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Sharma S, Sengupta S. Diindolocarbazole-Based Rigid Donor-Acceptor TADF Molecules for Energy and Electron Transfer Photocatalysis. Chemistry 2024; 30:e202303754. [PMID: 38009376 DOI: 10.1002/chem.202303754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 11/25/2023] [Accepted: 11/26/2023] [Indexed: 11/28/2023]
Abstract
The design and synthesis of four twisted donor-acceptor (D-A) thermally activated delayed fluorescence (TADF) molecules CBZ-IQ, CBZ-2FIQ, DI-IQ and DI-2FIQ is reported in this work based on diindolocarbazole (DI) and phenyl carbazole as donor and indoloquinoxalines as acceptor. These compounds serve as photocatalysts for organic transformations. Theoretical calculations and experimental data showed reasonable singlet and triplet energy gaps of 0.17-0.26 eV for all compounds. All molecules showed increase in fluorescence quantum yields after degassing the solution and the transient photoluminescence decay showed two components: shorter prompt components (11.4 ns to 31 ns) and longer delayed components (36.4 ns to 1.5 μs) which further indicate the occurrence of TADF process. Cyclic voltammetry studies indicated well-suited excited state redox potentials of all compounds to catalyze organic transformations such as heteroarene arylation. Accordingly, photocatalytic C-H arylation of heteroarenes were performed using these compounds with excellent isolated yields of upto 80 %. Due to their suitable efficient triplet energy levels, all the emitters were also employed as energy transfer photocatalysts in E to Z isomerization of stilbene with the excellent conversion of ~90 %.
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Affiliation(s)
- Sushil Sharma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, Punjab, 140306, India
| | - Sanchita Sengupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, Punjab, 140306, India
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Mayorga-Burrezo P, Sporer C, de Sousa JA, Capra N, Wurst K, Crivillers N, Veciana J, Rovira C. Electrocatalytic oxidative Z/E isomerization of a stilbene favoured by the presence of an electroactive persistent radical. Chem Commun (Camb) 2020; 56:14211-14214. [PMID: 33112297 DOI: 10.1039/d0cc04973e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A push-pull-functionalized stilbene has been prepared, with an electroactive perchlorotriphenylmethyl (PTM˙) radical and dimethylamine units as electron-withdrawing and -donating moieties, respectively, showing an electrocatalytic redox-induced Z→E isomerization where the open-shell nature of PTM˙ plays a key role in the isomerization ocurrance.
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Affiliation(s)
- Paula Mayorga-Burrezo
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, E-08193, Cerdanyola, Barcelona, Spain.
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Waszczuk M, Bianchi SE, Martiny S, Pittol V, Lacerda DS, Araújo ASDR, Bassani VL. Development and validation of a specific-stability indicating liquid chromatography method for quantitative analysis of pterostilbene: application in food and pharmaceutical products. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:4310-4318. [PMID: 32832940 DOI: 10.1039/d0ay00989j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Pterostilbene is a natural constituent with numerous preventive and therapeutic properties used for treating a wide range of human diseases. It has been isolated from blueberries in high concentrations. A versatile specific-stability indicating liquid chromatography method for reliable quantitative determination of pterostilbene in blueberry extracts was developed. In the stability-indicating analysis, pterostilbene samples were exposed to stress conditions: temperature, UV light, and oxidative, acid and alkaline media. The robustness of the method was evaluated using a Box-Behnken experimental design. Pterostilbene was stable in acid and alkaline media, but unstable when exposed to oxidation, high temperature, and UV light. Using the proposed method, it was demonstrated that degradation products did not interfere in the analyte analysis. The method revealed to be simple, fast, selective, linear, precise and accurate for the quantitative analysis of pterostilbene in Vaccinium myrtillus extract. Besides being a specific-stability indicating method, it demonstrated to be applicable to quantify pterostilbene in pterostilbene:β-cyclodextrin complexes and pterostilbene:β-cyclodextrin:hydrophilic polymer ternary systems. These findings are relevant for the development of food, pharmaceutical or cosmetic products containing pterostilbene or blueberry extracts.
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Affiliation(s)
- Mairique Waszczuk
- Laboratório de Desenvolvimento Galênico, Programa de Pós Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Ipiranga, 2752, 6° andar, CEP: 90610-000, Porto Alegre, RS, Brazil.
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Dattler D, Fuks G, Heiser J, Moulin E, Perrot A, Yao X, Giuseppone N. Design of Collective Motions from Synthetic Molecular Switches, Rotors, and Motors. Chem Rev 2019; 120:310-433. [PMID: 31869214 DOI: 10.1021/acs.chemrev.9b00288] [Citation(s) in RCA: 237] [Impact Index Per Article: 47.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Precise control over molecular movement is of fundamental and practical importance in physics, biology, and chemistry. At nanoscale, the peculiar functioning principles and the synthesis of individual molecular actuators and machines has been the subject of intense investigations and debates over the past 60 years. In this review, we focus on the design of collective motions that are achieved by integrating, in space and time, several or many of these individual mechanical units together. In particular, we provide an in-depth look at the intermolecular couplings used to physically connect a number of artificial mechanically active molecular units such as photochromic molecular switches, nanomachines based on mechanical bonds, molecular rotors, and light-powered rotary motors. We highlight the various functioning principles that can lead to their collective motion at various length scales. We also emphasize how their synchronized, or desynchronized, mechanical behavior can lead to emerging functional properties and to their implementation into new active devices and materials.
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Affiliation(s)
- Damien Dattler
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Gad Fuks
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Joakim Heiser
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Emilie Moulin
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Alexis Perrot
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Xuyang Yao
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
| | - Nicolas Giuseppone
- SAMS Research Group, Institute Charles Sadron, CNRS , University of Strasbourg , 23 rue du Loess , BP 84047, 67034 Strasbourg Cedex 2 , France
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Mishra S, Awasthi P, Singh J, Gupta RK, Singh V, Kant R, Jeet R, Goswami D, Goel A. White Light Induced E/Z-Photoisomerization of Diphenylamine-Tethered Fluorescent Stilbene Derivatives: Synthesis, Photophysical, and Electrochemical Investigation. J Org Chem 2018. [DOI: 10.1021/acs.joc.8b00033] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shachi Mishra
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Pallavi Awasthi
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Jagriti Singh
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Rahul Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Vikram Singh
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ram Jeet
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Debabrata Goswami
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Atul Goel
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
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