Search

[Display omitted] • A novel phosphorescence light-harvesting system with sequential two-step energy transfer processes was constructed. • The tunable multicolor emission was employed for the information anti-counterfeiting and storage. • The sequential two-step energy transfer processes facilitate the conversion of photosensitizer types. • The PLHS was employed to enhance the photooxidation of styrene derivatives and CDC reaction. Making full use of the captured energy by phosphorescence light-harvesting systems (PLHSs) and the tunable photoluminescence in energy transfer process to realize the multiple applications is still the challenge of PLHSs research. In this study, we have successfully constructed a highly effective PLHS with tunable multicolor luminescence and efficient conversion of photosensitizer types, which can further be used in photocatalytic organic conversion, information anti-counterfeiting and storage. The supramolecular polymer of BDBP-CB[8], which is generated by cucurbit[8]uril (CB[8]) and 4-(4-bromophenyl)-pyridine derivative (BDBP), realizes a phosphorescence emission and a change in luminescence color. Notably, white light emission was achieved and the logic gate systems were constructed utilizing the application of adjustable luminescence color. More interestingly, PLHS can be constructed by employing BDBP-CB[8] as energy donors, Sulforhodamine 101 (SR101) and Cyanine5 (Cy5) as energy acceptors, which results in a remarkably tunable multicolor photoluminescence to achieve the information storage. Furthermore, we have also found that BDBP-CB[8] can serve as type II photosensitizer for the effective production of singlet oxygen (1O 2) during the photooxidation process of styrene in aqueous environments, attaining a remarkable output rate reaching as high as 89 %. Particularly, compared with 1O 2 produced by type II photosensitizer BDBP-CB[8], the construction of PLHS can effectively convert type II photosensitizer to type I photosensitizer and efficiently generate superoxide anion radical (O 2 •−), which can be used for photocatalytic cross-dehydrogenative coupling (CDC) reaction in the aqueous solution with a yield of 90 %. Thus, we have created a PLHS that not only achieves tunable multicolor emission for information anti-counterfeiting and storage, but also realizes the conversion of reactive oxygen species (ROS) for different types photocatalytic oxidation reactions. [ABSTRACT FROM AUTHOR]

A novel triphenylamine-based SOF was constructed, which can serve as superoxide radical generator to promote the oxidative hydroxylation of arylboronic acids under green light in water. [Display omitted] • A novel triphenylamine-based SOF was constructed based on the host–guest interaction. • The control of singlet oxygen and superoxide radical can be realized by using SOF as photosensitizers. • The monomer TP-3Py can effectively produce singlet oxygen (1O 2) and realize the photocatalytic oxidation of thioanisole in water. • The TP-SOF has the ability to generate superoxide anion radicals (O 2 •−) efficiently. • TP-SOF can be used for the promotion of the oxidative hydroxylation of arylboronic acids under green light in water. Supramolecular organic frameworks (SOFs) mostly require high-energy purple or blue light for photocatalytic reactions, while highly abundant and low-energy light systems have rarely been explored. Therefore, it is necessary to construct 2D SOFs for low-energy light-induced photocatalysis. This study describes the design and synthesis of a water-soluble two-dimensional (2D) supramolecular organic framework (TP-SOF) using the host–guest interaction between a triphenylamine derivative (TP-3Py) and cucurbit[8]uril (CB[8]). The formation of the 2D SOF can be attributed to the synergistic impact resulting from the orientated head-to-tail superposition mode between the vinylpyridine arms of TP-3Py and CB[8], which results in a significant redshift in the UV–vis absorption spectrum, especially displaying a strong absorption band in the green light region. The monomeric TP-3Py can effectively produce singlet oxygen (1O 2) and realize the photocatalytic oxidation of thioanisole in the aqueous solution. In comparison to monomeric TP-3Py, the confinement effect of CB[8] results in a notable enhancement in the production efficiency of superoxide anion radicals (O 2 •−), exhibiting promising prospects in the field of photocatalytic oxidation reaction, which facilitates the application of TP-SOF as a very efficient photosensitizer for the promotion of the oxidative hydroxylation of arylboronic acids under green light in the aqueous solution, giving a high yield of 91%. The present study not only presents a compelling illustration of photocatalysis utilizing a 2D SOF derived from triphenylamine, but also unveils promising avenues for the photocatalytic oxidation of SOF employing low-energy light systems. [ABSTRACT FROM AUTHOR]

[Display omitted] • A pyrene-based amphiphilic molecule (Pmvb) was designed and synthesized. • Pmvb could self-assemble into rod-like aggregates in aqueous solution. • Pmvb can be used as highly specific colorimetric and fluorimetric sensors for ClO− and Fe3+. In this study, a pyrene-based amphiphilic molecule (Pmvb) was designed and synthesized, which could self-assemble into rod-like aggregates in aqueous solution. The modification of luminescence and the sensing capabilities of Pmvb can be accomplished by ClO− and Fe3+ in water and DMSO, respectively, through self-assembly and disassembly process. In the aqueous solution, ClO− has the potential to engage in electrostatic interactions with the positively charged methylpyridine groups of Pmvb, which leads to a notable enhancement in fluorescence emission and a discernible alteration in color, transitioning from dark yellow to bright orange. Interestingly, in DMSO solution, the luminescence suppression of Pmvb in the presence of Fe3+ was observed, accompanied with change of the fluorescence emission color from bright yellow to dark orange, caused by the cation-π interactions between Fe3+ and the pyrene unit of Pmvb. Thus, the specific colorimetric and fluorometric sensor of pyrene derivatives could be achieved by ClO− and Fe3+ in different solvents. [ABSTRACT FROM AUTHOR]