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Synthetic dyes in food can cause severe problems for health, so they need to be replaced by natural dyes. However, natural dyes are unstable, and encapsulation is one way to maintain the stability of natural dyes. This study was conducted to determine the best microencapsulation coating, storage stability, and color variations produced by butterfly pea, sappan wood, and turmeric extracts. The coating materials used were maltodextrin, carrageenan, and carboxy methyl cellulose (CMC) using the following formulations: 85% maltodextrin and 15% carrageenan (formula A) and 90% maltodextrin and 10% carrageenan (formula B) for coating butterfly pea and sappan wood extracts. Turmeric extracts were coating using 85% maltodextrin and 15% carrageenan (formula A) and 75% CMC and 25% starch (formula C). The encapsulation with maltodextrin (90%) and carrageenan (10%) was the best of encapsulation formula for butterfly pea and sappan wood extract. However, the encapsulation with maltodextrin (85%) and carrageenan (15%) was the best of encapsulation formula for turmeric extract. The green color was obtained from mixing butterfly pea and turmeric dyes in 1:4 ratio, purple from mixing butterfly pea and sappandyes in 1:8 ratio, and orange from mixing turmeric and sappan dyes in 1:2 ratio.

A series of inorganic pigments LiMg1-xCoxPO4 have synthesized by conventional solid-state method. Optical features of the phase pure compounds have investigated, the characteristic absorption spectra confirmed the octahedral geometry of Co2+ chromophore. The spin allowed d-d transition in the visible region attributed to the excellent magenta hue of the pigment series. The best composition LiMg0.8Co0.2PO4 exhibited colour a* = 26.45, b* = −26.83 and NIR reflectance 67% and total solar reflectance (TSR) 55%. Acrylic coatings of LiMg0.8Co0.2PO4 on concrete and Al roofing sheet have successfully retained the pigment properties. Subsequent temperature shielding experiment and thermal images of coatings revealed 7 °C reduction in interior temperature for the magenta coatings compared to commercial CoAl2O4. The pigment LiMg0.8Co0.2PO4 shown excellent corrosion resistance on steel epoxy coatigs, because of the active phosphatization mechanism. The charge transfer resistance Rct = 9.3 × 109 Ωcm2, of the coatings are 4 order higher than that of bare and CoAl2O4 loaded epoxy coatings. In addition, 10 wt% of the pigment shown an intense colour in transparent PMMA matrix, substantiated the colour deliverability of the material. Eventually, the studies concluded that LiMg0.8Co0.2PO4 could be a potential inorganic pigment for developing an anticorrosive ‘cool’ paint for energy efficient buildings.

The iron oxychloride/pillared montmorillonite (FeOCl/MMT) catalyst was prepared by wet impregnation method and solid melting method. Various characterization techniques were used to analyze the microscopic morphology and structure of a series of catalysts. Moreover, the catalysts were used to treat magenta-simulated dye wastewater through catalytic wet peroxide oxidation (CWPO) degradation. The magenta removal rate and chemical oxygen demand (COD) removal rate of the magenta-simulated dye wastewater were used to evaluate the catalytic performance of the catalyst, and the optimal catalyst preparation conditions were selected. The results showed that the solid melting method was more favorable to the preparation of the catalyst, and the COD removal rate of wastewater can reach 70.8% when the FeOCl load was 3%. Moreover, 96.2% of the magenta in the solution was removed. The COD removal rate of the magenta wastewater decreased by only 12.4% after the catalyst was repeatedly used six times, indicating that the catalyst has good activity and stability. The Fermi equation can simulate the reaction process of the catalyst treating magenta wastewater at high temperature. HIGHLIGHTS Loading FeOCl on montmorillonite with Al-pillar support to treat magenta-simulated wastewater.; Determining the optimal preparation conditions of the catalyst and finding that only a small amount of Fe ions leached in repeat experiments.; The mechanism of the CWPO reaction was explored, and the free radical groups that play an important role in the reaction was found.

Eight azomethine pyrazolone magenta dyes with iminodiethanol groups have been synthesized from 1,3-disubstituted- 1H-pyrazol-5( 4H)-ones in good yield. The newly synthesized dyes were characterized using spectroscopic data and elemental analyses techniques. All dyes have been successfully applied to polyester fabrics as disperse dyes where their dyeing performances have been discussed and evaluated in detail. The shades of these dyes ranged from red violet, purple and dark purple colors with good depth, brightness and good leveling properties. Multifunctional properties such as color representation, colorimetric data (L*, a*, b*, C*, h*, K/S), fastness properties of the dyed samples with respect to washing, perspiration, rubbing and light fastness have been discussed and evaluated in detail. The degree of exhaustion and fixation was also achieved after establishing the optimal dyeing conditions at 130°C, high pressure, 2% shade, and pH ≈5. As well, the influence of the dye bath pH on the K/S percentage and color intensity was estimated and discussed. Furthermore, the dyed fabrics were tested for ultraviolet protection factor and the results showed that these dyes gave excellent ultraviolet protection.

The FMCG sector (Fast Moving Consumer Goods) is one of the largest industries in the world wherein the brands are reliant on the customer attraction and product sales worldwide. It is important for brands to maintain the quality and color consistency of these products. FMCG labels printed with Spot colors by Flexography process is not cost-effective due to higher job changeover times and wastage. The most effective way of ensuring spot color reproduction is implementing Expanded Color Gamut (ECG) printing by using a fixed set of colors with four process colors namely Cyan, Magenta, Yellow, Black (CMYK) along with three colors Orange, Green and Violet (OGV). These seven colors provide eye-catching graphics and a larger gamut so as to reproduce maximum number of Pantone® colors. The evaluation of spot color reproduction was carried on a Nilpeter FB-430 Narrow Web Flexo press that included runs viz. Initial, Optimization, Fingerprinting, Characterization and Validation on Polypropylene substrate with UV based inks. The runs were carried as per Idealliance® specifications. The aims and tolerance as per ISO 12647-2 with CRPC 6 GRACoL 2013 for CMYK while ISO 20654 Spot Color Tonal Value (SCTV), Chroma and Hue for OGV were achieved. The customized Characterization Test Chart with 2016 patches for CMYKOGV for profile generation and Verification Test Chart with 799 patches of Pantone® Solid Coated from the Digital Library was created in CGS Oris XGamut. These Test Charts were measured using X-Rite EyeOne iO automated device. The magnitude of color match for Spot Colors by expanded gamut printing was verified on a narrow web flexography press. The gamut analysis between CRPC 6 and CMYKOGV showed that from the geometric region of Pantone® Colors Inside CMYKOGV Gamut and Outside CRPC6 Gamut, 85% of the Pantone colors were reproduced below Delta E 2.5.

Recently, there has been much interest in applying the color changes of nano-patterned structures to sensor technology. However, the lithographic nano-patterning process is not environmentally friendly, and it is difficult to fabricate large areas of color due to limitations associated with this approach. In this study, we realized a highly tunable structural coloration based on a Fabry–Perot interferometer design that does not require nano-patterning processes. To increase the reflected color change according to the angle, a color element using an asymmetric metal–insulator–metal structure was applied, fabricated using silver–silicon dioxide–tin (Sn), respectively. Using the optical properties of Sn, we maximized the change in reflection color and realized three primary colors of subtractive color of cyan, magenta and yellow according to the angle of designed MIM structure. Theoretical and experimental results revealed that the color and intensity of the reflectance depended strongly on the angle of the reflective surfaces. The manufacturing process is simple and yields large surfaces of high quality. Based on this premise, we fabricated a soft robot capable of color camouflage, and an angle-detecting color sensor for inspecting the three-dimensional shape quality of curved glass with a high sensitivity of 1.8 nm/degree. In addition, we propose a shape evaluation method by color, spectrometry, and monochromatic light.

In the present study an attempt has been made to identify the green vegetation based on colour using visible spectral colour indices such as excess green index (ExG), excess red index (ExR) and excess green minus excess red index (ExGR). At first stage, the performance of colour indices were tested at four illumination intensities using the standard colour patches. The results indicated a clear separation between the ExG, ExR and ExGR values of green colour patches (foliage, yellow green & green) and soil colour patches (dark skin, moderate red & magenta) at illumination intensity of 89.04 ± 8.12 lux than 188.8 ± 6.36, 259.25 ± 12.73 and 359.28 ± 10.10 lux illumination intensities. This observation suggested that the colour indices might perform better at low lighting condition. In the second stage, the images of original plants and soil were captured at an illumination intensity of 89.04 ± 8.12 lux and classification rate at different threshold were studied. The average correct classification rate of ExGR and ExG colour indices were found to be 93.03% and 86.03% at threshold values 0 and 10, respectively. This indicates that the colour index ExGR could be successfully employed for image based classification of plant and non-plant material.

Purpose: The aim of this study was to describe a poly-vinyl chloride air condition (PVC AC) curtain shield placed at the intervening space between the chin rest and the illuminating and optical arm of the slit lamp microscope (distal barrier) instead of the present position at the oculars (proximal barrier) to guard against severe acute respiratory syndrome Coronavirus 2. This experimental study was done to validate and compare the protection offered by the conventional breath shields and the one described by us in a simulated environment. Methods: In this experimental study, 12 puffs of fine mist were sprayed over a period of 1 minute using “magenta-colored dye” and “cyan-colored dye” for analyzing proximal barrier and distal barrier respectively. To access the amount of contamination of the slit lamp, caused by sprayed “magenta” and “cyan” colored dye, we covered the entire slit lamp with appropriately sized white-colored cotton sheet. The stained sheets were individually photographed and then the images were first cropped, then color threshold adjusted and then converted to binary and finally fraction of surface area stained was calculated using the ImageJ software. (Pn Surface Area magenta fraction (%) during analysis of “proximal barrier” and Pn Surface Area cyan fraction (%) during the analysis of “distal barrier”, where Pn refers to various parts of slit lamp. Results: The entire surface area of the cloth covering the slit lamp was 9912.45 cm2. The surface area of the cloth which was stained when using the “proximal barrier” was 567.50 cm2 whereas when using the “distal barrier” was 222.93 cm2. When using proximal barrier, 97.71% of the staining was present on the slit lamp base, viewing arm, illumination arm and the pivot of the slit lamp. While using the distal breath shield no parts of the viewing arm, illumination arm, the pivot or the mechanical base with joystick were stained. Conclusion: The novel PVC AC curtain shield provides better barrier against the simulated contaminated stream of patient's breath directed towards the working parts of the slit lamp as compared to conventional slit lamp oculars mounted breath shields.

This study covers aspects of stability and colouration of Carthamin– a unique red chalcone extracted from Carthamus tinctorius L. Due to its fast degradation in aqueous solutions even at room temperature, Carthamin has no significant use in the food industry. Therefore, obtaining Carthamin in a stable form is of high interest. Comparing UV–Vis spectra of Carthamin solutions and RGB-data of Carthamin–cellulose complex in the wet state showed a predominant formation of stable Carthamin conformation on the cellulose phase. It was determined that the wet Carthamin–cellulose complex acquires a stable and rich magenta colour in the pH range of 1–5. In aqueous suspensions with pH >6, the Carthamin–cellulose complex gets a purple colour, which is absolutely uncharacteristic for pure Carthamin in an aqueous solution. IR spectra indicate the fixation of Carthamin molecules on the cellulose, which presumably causes hindrance of free internal rotation of Carthamin molecules in the cellulose phase. The reduction of water activity in the cellulosic phase represents an additional stabilizing factor. As a result, the Carthamin–cellulose complex withstands heating up to 70 °C for 15 min in the pH range of 2–5, showing up to 90% of stability. These conditions are typical for the preparation of a wide range of food products. High stability in a food-like environment and magenta colour make the Carthamin–cellulose complex a prospective natural food dye.

A directed synthesis of the first nitrile-rich dye showing visible-light-induced negative photochromism in aqueous medium was implemented. The possibility to change the color of an aqueous solution from yellow to magenta by varying the pH from 5 to 8 was shown. The synthesized dye was found to be a thermally unstable photochrome (T-type) whose photoinduced form returned to the initial state following the first order kinetic equation in the dark at room temperature. It was possible to change the dark reaction rate in a wide range and to block the photochromic process by pH regulation. The calculated pKa1 of the initial form was more than 2.5 units higher than the pKa1S of the photoinduced form, which indicated the photoacidity of the dye in aqueous medium. This allowed the pH of the solution on 1.2 pH units to be reversibly changed under visible light irradiation, followed by dark relaxation. The obtained results revealed a new direction in the investigation of nitrile-rich negative photochromes, namely, the synthesis of water-soluble multicolor molecular switching systems sensitive to several factors.

In this study, three foodstuffs (surimi, minced meat, and milk) were dyed with carminic acid and carminic aluminum lake. The effects of protein, metal ions, and food additives on the color of carminic acid and carminic aluminum lake were investigated. After being dyed by carminic acid, the colors of surimi, minced meat, and milk were light purple, red, and gray‐green, respectively. When using carminic aluminum lake, surimi and milk were magenta, and minced meat was red. Regarding the carminic acid solution, the presence of myofibrillar protein (MFP), whey protein isolate (WPI), and soy protein isolate (SPI) turned it red by changing the pH, while the presence of casein made it orange. The carminic aluminum lake solution turned magenta in all four cases, which were not affected by protein. The color of carminic acid and carminic aluminum lake was significantly affected by 0.001–0.1 mol/L Fe3+, 0.001–0.1 mol/L Fe2+, 0.001–0.1 mol/L Cu2+, and 0.1 mol/L Ca2+, limiting their application in iron‐, copper‐, and high‐calcium foods. The color of carminic acid was changed to yellow by 0.01%‐1% sodium nitrite, but 0.01%–1% ascorbic acid and 0.01%–0.1% monascus color did not significantly affect the color of either carminic acid or carminic aluminum lake. This paper provides a reference for the application of carminic acid and carminic aluminum lake in food science., Three foodstuffs (surimi, minced meat and milk) were dyed by carminic acid and carminic aluminum lake. The effects of protein, metal ions and food additives on the color of carminic acid and carminic aluminum lake were investigated.This paper provides a reference for the application of carminic acid and carminic aluminum lake in food industry.

Waste textiles generally have various colours. The largely discarded textiles not only result in huge loss of the limited natural materials, but also waste the colour in it which had cost substantial energy consumption and risked water pollution during dyeing. This work aimed to recycle both the waste textiles and the colours in them. In this research, magenta waste cotton fabric was firstly milled into powders with different particle sizes, and then printed as “pigments” onto cotton fabric to achieve new magenta coloured fabrics. Properties of the powders and corresponding printed fabrics were tested, including powder morphology, colour and fabric colour fastness. Powders with different particle sizes showed different colour depth from the K/S and L*a*b* value results. The K/S value of printed fabrics indicated that particle size did not have an apparent influence on the fabric colour. Furthermore, fabrics printed with 2, 5, 10 and 30 µm magenta cotton powders presented good fastness, among which the fabric printed with 5 µm powders possessed the best colour and rub fastness. This study demonstrated a potential new application for coloured textile waste.

Herewith, we synthesized the new oxazolidines (SP-1, SP-2 and SP-3) by without using any withdrawing or donating substitution, and for these molecules we demonstrated CO2 sensing properties in naked eye condition with different colors (yellow and magenta). All the dyes showed different colors in the presence and absence of CO2 in ethanol solution with the concept of ring closing and opening. In UV-visible absorption spectrum all the compounds showed visible light absorptions after purging of CO2. To confirm this mechanism for SP-1 molecule case, we approached the 1H-NMR and 13C-NMR techniques deuterated methanol as a solvent and we clearly identified. The stability of the SP-1 molecule in ethanol for CO2 purging case, we studied repeatability test up to ten cycles and we confirmed that there is no any decrease in sensing ability.

Food adulteration is a primary global concern for public health, especially in developing countries, due to the lack of monitoring and appropriate policy developments and implementations. Synthetic colors and dyes are used to enhance the appearance of food products. Metanil Yellow (MY), a non-permitted, toxic, chief additive adulterant is majorly used in sweets, pulses, and turmeric in India owing to its color that ranges from yellow to orange. Owing to this, we have assessed the presence of MY in sweets like “jalebi” and “laddu” from branded and local vendors. We present a method to isolate the additive from the sweets with the help of acetic acid, followed by screening through colorimetric assay. The chemical characterization of MY was conducted using a multi-plate ultraviolet–visible (UV–Vis) spectrophotometer and attenuated total reflectance–Fourier transform infrared spectroscopy (ATR–FTIR). The appearance of magenta/pink color indicates the presence of MY in the chemical spot test. Also, thin-layer chromatography (TLC) was applied to validate the presence of this adulterant by comparing the peaks of reference (MY) with the extracted samples. TLC of food color extracted from the samples is an easy, efficient, and cost-effective method to detect toxic adulterants like MY. Our study demonstrates a simple food color extraction procedure, with easy and sensitive chemical assays, for the detection of MY in sweets. It also offers reasonable sensitivity and can be used to screen large numbers of samples in a short time.

BACKGROUND To evaluate the effects of the ChromaGen contact lens (CCL) on best-corrected visual acuity, contrast sensitivity and pseudoisochromatic test plate performance in patients with congenital colour vision deficiency (CVD). METHODS CCLs were inserted into 50 eyes of 25 patients with congenital red-green CVD. The patients were tested with the Ishihara and Hardy-Rand-Rittler test plates before and after the insertion of Magenta 2, Magenta 3, and Violet 3 CCLs. The patients' mean numbers of recognised symbols were calculated and the most appropriate CCL was determined for each eye. The best-corrected visual acuity for both far and near vision and contrast sensitivity were evaluated before and after the insertion of the appropriate CCLs, and the results were compared. RESULTS The mean age of the patients was 26.56 ± 10.30 years. While all CCLs increased the mean numbers of recognised symbols on the Ishihara (p

Numerous color images are digitally reproduced today, mainly using the cyan, magenta, yellow and black ink set. The information in a printed image, however, may be distorted or lost due to the image's gradual color degradation as the result of ink fading and diffusion on the substrate. The degradation behavior of the inks can be difficult to predict when catalytic fading is introduced by a variety of ink mixtures produced in the printing process. In this article, we prove that the fading or diffusion rate has an equivalent interpretation as the hazard function in reliability modeling, and the degradation model of printed images with constant fading and diffusion rates can be reformulated as a Markov process model. Hence, the degradation of printed images with time-varying fading and diffusion rates can be modeled as a semi-Markov process. The semi-Markov process model provides a deterministic degradation prediction. We further propose a spatio-temporal Wiener process model for stochastic prediction of the ink fading and diffusion of printed images. Numerical examples and a real-life case study are provided to illustrate the proposed approach.

This article presents new optical pixel sensors that are based on hydrogenated amorphous silicon thin-film transistors (a-Si:H TFTs) for detecting secondary color optical signals to increase the number of colors of sensed light. Three types of series-connected structure with different photo TFTs enable the sensors to receive secondary color optical input signals that combine any two primary colors, such as magenta (blue and red), cyan (green and blue), and yellow (red and green). The secondary color optical sensors also prevent from being affected by light of a single color to integrate with primary color optical sensors for realizing a six-color sensing mechanism. Moreover, only one photo TFT is used to suppress the effect of ambient white light by compensating photocurrents without increasing the complexity of the proposed sensor structure. The measurements demonstrate that the difference in the output voltages is 15.6 V even under ambient white light with an intensity of 10000 lux, proving that the proposed sensor can yield significantly different sensing results with and without an optical input signal under intense ambient white light. Thus, the proposed sensors increase the number of sensed color light that can be integrated with a large TFT-LCD panel for multiuser interaction.

The intensive use of flexographic printing for packaging decoration and the increased consumer demands for it require an in-depth study of the factors that influence the prints’ quality. In this paper, we examined the test prints obtained at a flexographic proofer. Images on cardboard were printed by the environmentally friendly inks made by a Ukrainian manufacturer. The effect of the cardboard surface layer on the microgeometry of the prints created by cyan, yellow, black, and magenta inks has been shown. It has been established that the roughness parameter Ra for a two-layer coated cardboard is reduced by 3times as compared to the uncoated cardboard. The photographs of the microstructure of the prints’ surface, their profile demonstrate a significant effect of the chalked coating on the image quality. It has been confirmed that the ink layer smooths out the micro-roughness of the print surface. However, when printed on the uncoated cardboard, the ink particles penetrate deeper into the structure and do not completely smooth out its micro-roughness. If the size of the printing element is smaller than the size of the cell on a raster roller, it falls into this cell and the ink is applied beyond the boundaries of the image. As a result, a spot of an arbitrary shape is formed on the print instead of a raster dot of a certain size, that is, the so-called "inverse tone transfer" occurs. We have measured the densitometric indicators of prints (optical density, gray balance), which significantly affect the quality of the product. Based on a Harrington's desirability function, the maximum permissible values of optical density, evenness of printing, contrast, dot gain of raster elements, and trapping, have been calculated. According to the generalized optimization criterion, a comprehensive index of the prints’ quality has been determined, which could ensure the predicted quality of a would-be run of the printed products, and would make it possible to adjust the printing process if necessary

Recently, more attention has been paid for the research of CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) owing to their tunable luminescence characteristics and ultrahigh photoluminescence quantum yiel...

The study investigated the differences between perceived and instrumentally measured colors of woven fabrics in which different colored yarns are woven together such that they are perceived as solid colors. Cyan, magenta, and yellow yarns were woven together to produce 63 fabrics in a wide range of colors, the values of which were measured spectrophotometrically. The measured colors were generated as solid color images on a calibrated cathode ray tube (CRT) monitor. Then the fabrics were scanned and their scanned images were displayed beside their corresponding solid color images on the CRT monitor to evaluate the visual color difference between them. The results showed that the individual yarn colors and their interlacement on the fabric surface influenced the overall color appearance. Although the woven and solid colors in each pair had identical CIELAB color values, the perceived color difference was as large as 5.68 ΔE*ab,10 on average. Fabrics composed of various colors of yarn were found to have larger visual color differences from their measured colors than those composed of single colors of yarn. The visual color difference varied according to texture, but texture strength, which has been widely reported as a strong parametric factor in visual color difference evaluation, was not shown to have had a consistent effect. This study also examined how the overall color attributes, including the lightness, chroma, and hue, of fabrics affected the visual color difference and developed a predictive model of those effects.

In recent decades the interest to the study of Hedysarum has increased. Researchers touched upon the classical issues of morphology and variability of external features of Hedysarum grandiflorum and other species of Hedysarum (to clarify morphology, to more accurately separate existing species, to describe the morphology of new species, including rare ones) providing almost no detailed descriptions. The paper provides information about the morphology of external features of H. grandiflorum in the Southern Volga Upland. The study was conducted in 2007–2018. We have studied 23 H. grandiflorum cenopopulations in habitats with various environmental conditions, where more than 600 counting sites were laid, and concluded that the morphological features of H. grandiflorum are rather variable and the values of morphometric parameters are higher in the northeastern part of the study area. The well-being of the population is achieved due to some heterogeneity in the size of individual plants and by means of suppressing the growth and size of separate cenopopulations. The decrease in the parameters of signs is often associated with a higher anthropogenic load. Dimensional indicators of individuals from the cenopopulations of the species studied depend on the thickness of soil, which decreases from fescue-feather grass to petrophyte steppes. Cluster analysis has allowed us to divide the cenopopulations into southern, northern and northeastern ones, and those with anthropogenic impact. The least variable and most informative morphological features of H. grandiflorum (in the descending order of importance) are: the length of the standard, the diameter of the caudex, the plant height, the number of foliole pairs, the number of inflorescences, the number of leaves, the length of the unpaired foliole, the number of flowers on the inflorescence, the length of leaves and the width of the unpaired foliole. In the overwhelming majority of the plants encountered, all the petals of the corolla were of uniform light yellow color, turning into a white tint to the edges of the petals. In some cenopopulations, the corolla can be colored differently and unevenly, especially at the keel. Approximately 0.3% of individuals of the corolla petals and/or the lower part of the keel and/or veins are light blue or light pink, less than 0.07% has a light magenta or even light purple tint of the veins of the carina, edges of the petals or the whole corolla. Similar individuals are found in other regions. Many scientists noted this peculiarity a long time ago and had already described this phenomenon as a color variation (for example, H. grandiflorum var. violaceum) or less often, as a subspecies (for example, H. grandiflorum ssp. argenteum). Individuals with recessive coloring of the corolla from the area of study are called intraspecific color variations.

Electro-fluidic displays (EFDs) are one of the most promising reflective displays due to their full color and video speed. Colored EFD oil, normally formulated by dissolving soluble organic dyes in non-polar solvent, dominates the color, electro-optical behavior and reliability performance of electro-fluidic display devices. In this paper, novel perylene-based organic dyes for electro-fluidic displays, which can cover yellow, orange, red, magenta and cyan colors, were synthesized. The absorbance, electro-optical and light stability properties were tested; the results showed that the perylene-based organic dyes are especially suitable for EFDs.

International audience; A series of six compounds composed of an emissive oligofluorene or dithiophenethiobenzimidazole (p3) core bearing H-bonding biuret molecular recognition motifs in the meta-or para-position was investigated with regard to their propensity to undergo either social or narcissistic self-sorting when deposited from dilute THF solutions. The structural similarity of the compounds uniformly leads to social self-sorting with the exception of two combinations involving p3 for which narcissistic self-sorting is observed instead. Their behavior is attributed to the difference in location of the biuret groups (meta vs. para) combined with a greater structural difference in the conjugated core. Deposition of solutions demonstrating narcissistic self sorting gives rise to ensembles of disk-like aggregates exhibiting two different populations of emission (blue and magenta or yellow and orange).