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6 results on '"Guo Rong Chen"'

1. Selective Catalytic Oxidation of Diglycerol

Author

Marc Lemaire, Huan Wang, Guo-Rong Chen, Nicolas Duguet, Estelle Métay, Vu Duc Nam, Catalyse Synthèse et Environnement (CASYEN), Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), and East China University of Science and Technology

Subjects
010405 organic chemistry, Inorganic chemistry, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, Pollution, Oxygen, 0104 chemical sciences, Neocuproine, chemistry.chemical_compound, chemistry, Product (mathematics), Yield (chemistry), Selective catalytic oxidation, Environmental Chemistry, [CHIM]Chemical Sciences, Palladium
Abstract

International audience; The selective oxidation of alpha-alpha-diglycerol was studied using oxygen as a clean oxidant in the presence of a palladium / neocuproine complex. After optimization of the reaction parameters, the mono-oxidation product was obtained with 93% NMR yield (up to 76% isolated yield). The product was named "diglycerose" considering that it mainly exists as a cyclic hemi-ketal form.

Published
2021

2. Fluorescent glycoconjugates and their applications

Author

Baptiste Thomas, Xi-Le Hu, Guo-Rong Chen, Marion Donnier-Maréchal, Kai-Cheng Yan, Sébastien Vidal, Xiao-Peng He, Chimie Organique 2-Glycochimie (CO2GLYCO), Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)

Subjects
Glycoconjugate, High selectivity, Cancer therapy, Antineoplastic Agents, Context (language use), 010402 general chemistry, 01 natural sciences, Fluorescence, Drug Delivery Systems, Cell Line, Tumor, Neoplasms, Humans, [CHIM]Chemical Sciences, Avidity, Fluorescent Dyes, chemistry.chemical_classification, biology, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Lectin, General Chemistry, 3. Good health, 0104 chemical sciences, Biochemistry, chemistry, Drug delivery, biology.protein, Glycoconjugates
Abstract

International audience; Glycoconjugates and their applications as lectin ligands in biology has been thoroughly investigated in the past decades. Meanwhile, the intrinsic properties of such multivalent molecules were limited essentially to their ability to bind to their receptors with high selectivity and/or avidity. The present review will focus on multivalent glycoconjugates displaying an additional capability such as fluorescence properties for applications toward imaging of cancer cells, detection of proteins or pathogens but also for drug delivery systems toward targeted cancer therapy. This review is a collection of research articles discussed in the context of the structural features of the fluorescent glycoconjugates organized according to their fluorescent core scaffold and with their representative applications.

Published
2020

3. Thiophenol detection using an AIE fluorescent probe through self-assembly with TPE-based glycoclusters

Author

Xiao-Peng He, Guo-Rong Chen, Lei Dong, Sébastien Vidal, Chimie Organique 2-Glycochimie (CO2GLYCO), Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), and East China University of Science and Technology

Subjects
Aqueous solution, Thiophenol, Organic Chemistry, High selectivity, Phosphate buffered saline, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Biochemistry, Fluorescence, 6. Clean water, 0104 chemical sciences, chemistry.chemical_compound, Environmental water, chemistry, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Self-assembly, Physical and Theoretical Chemistry, 0210 nano-technology, Sensing system
Abstract

International audience; We describe a novel green-emitting tetraphenylethylene-dicyanomethylene-4H-pyran (TPE-DCM) based fluorescent probe (TD-1). Conjugating TPE and DCM moieties allowed TD-1 to display high selectivity for thiophenol with excellent AIE properties in aqueous solution. Nevertheless, the poor water-solubility from the hydrophobic structure resulted in the weak and unstable emission intensity. Non-covalent self-assembly of TD-1 with TPE glycocluster (TPE2S) led to a largely improved water solubility producing a reliable and stable sensing system. The corresponding glyco-probe could detect sensitively exogenous thiophenol concentrations in PBS buffer or environmental water samples.

Published
2019

4. Direct Aldolization of Unprotected Fructose to Bio-Based Surfactants

Author

Guo-Rong Chen, Marc Lemaire, Biwen Zhu, Nicolas Duguet, Catalyse Synthèse et Environnement (CASYEN), Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), East China University of Science and Technology, Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut de Chimie du CNRS (INC)-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)

Subjects
chemistry.chemical_classification, Hydrogen, Base (chemistry), 010405 organic chemistry, Renewable Energy, Sustainability and the Environment, [CHIM.ORGA]Chemical Sciences/Organic chemistry, General Chemical Engineering, Trimethylamine, chemistry.chemical_element, Bio based, Fructose, General Chemistry, Alkylation, 010402 general chemistry, 01 natural sciences, Tautomer, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Yield (chemistry), Environmental Chemistry, Organic chemistry, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

A new alkylation mode of fructose was developed by direct aldolization of unprotected fructose with fatty aldehydes as alkylating agents. The reaction occurs in the presence of a base in a mixture of water/EtOH at 60 °C under microwave irradiation. Trimethylamine was found the most effective base for the aldolization of fructose with short chain aldehydes (C4–C8) while better results were obtained with K2CO3 in association with tetrabutylphosphonium bromide (TBPB) for long chain aldehydes (C8–C12). The corresponding alkylated fructose were obtained as mixture of 3 main tautomers (the β-pyranoid form being the predominant isomer) and were isolated with 31–46% yield. These aldolization products were also reduced under hydrogen to give the corresponding alkylated heptaols with 84–96% isolated yields.

Published
2018

5. Effects of Ag addition on properties and structure of Ge–Ga–Se–AgI chalcohalide glasses

Author

Guo-Rong Chen, Yinyao Liu, Jing Ren, David Le Coq, Lili Hu, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Key Laboratory for Ultrafine Materials, NSFC 51572081, National Natural Science Foundation of China, 20120074110018, Research Funds for the Doctoral Program by Ministry of Education of China, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Materials science, Band gap, Analytical chemistry, Mineralogy, 02 engineering and technology, Activation energy, Conductivity, 010402 general chemistry, 01 natural sciences, Metal, symbols.namesake, Arrhenius fitting, Electrical resistivity and conductivity, Materials Chemistry, [CHIM]Chemical Sciences, Thermal stability, Chalcohalide glasses, Arrhenius equation, 021001 nanoscience & nanotechnology, Condensed Matter Physics, AC conductivity, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, visual_art, Raman spectroscopy, Ceramics and Composites, visual_art.visual_art_medium, symbols, 0210 nano-technology
Abstract

An increasing amount of Ag metal was introduced in two GeSe2-Ga2Se3-AgI chalcohalide glasses with GeSe2/Ga2Se3 molar ratios of 1:1 and 2:1. Up to 25 mol% Ag can be added in this GeSe2-Ga2Se3-AgI glass. The effects of Ag addition on some basic properties such as density, thermal stability, and optical band gap were investigated to have an overall understanding of GeSe2-Ga2Se3-AgI-Ag chalcohalide glasses. The modification of glass networks can be observed by Raman spectra and DSC measurements. Specifically, electrical conductivity was characterized by AC impedance spectra. The activation energy values of conductivity (E-sigma) were obtained through Arrhenius linear fitting. The large amount of Ag in the systems led to high conductivity and low E-sigma values. In general, several basic properties of the two series of novel glasses with different GeSe2/Ga2Se3 ratios were investigated in parallel and their potential as solid state conductive materials was evaluated. (C) 2015 Elsevier B.V. All rights reserved.

Published
2016

6. Preparation and Photoluminescence Properties of Eu2+-Doped Oxyapatite-Type SrxLa10−x(SiO4)6O3−x/2

Author

Zhao-Feng, Cui, Shuang-Long, Yuan, Yun-Xia, Yang, Cheviré, François, Tessier, Franck, Guo-Rong, Chen, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE]Chemical Sciences/Material chemistry, 78.55.Hx, 81.20.-n, 61.66.Fn
Abstract

International audience; Eu2+-doped oxyapatite SrxLa10−x(SiO4)6O3−x/2 phosphors are prepared by solid-state reaction at high temperatures under reducing atmosphere. Their crystal structures and photoluminescence are investigated by x-ray diffraction (XRD) and fluorescence spectroscopy, respectively. The XRD results indicate that the samples are pure oxyapatite phase (P63/m space group). The fluorescence spectra show two peaks corresponding to two sites (4f and 6h sites) for Eu2+ in the host lattice. As the Eu2+ content influences the intensity ratio of the two observed emission peaks, the photoluminescence mechanism is discussed.

Published
2011

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