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Patil VS, Padalkar VS, Tathe AB, Gupta VD, Sekar N. Synthesis, photo-physical and DFT studies of ESIPT inspired novel 2-(2',4'-dihydroxyphenyl) benzimidazole, benzoxazole and benzothiazole. J Fluoresc 2013; 23:1019-29. [PMID: 23681947 DOI: 10.1007/s10895-013-1228-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 04/30/2013] [Indexed: 11/25/2022]
Abstract
Novel ESIPT inspired benzimidazole, benzoxazole and benzothiazole were synthesized from 2,4-dihydroxy benzoic acid and 1,2-phenelenediamine, 2-aminophenol, and 2-aminothiophenol respectively. The synthesized 2-(2',4'-dihydroxyphenyl) benzimidazole, benzoxazole and benzothiazole are fluorescent and the emission characteristic are very sensitive to the micro-environment. They show a single absorption and dual emission with large Stokes shift originating from excited state intramolecular proton transfer. The absorption-emission characteristics of all these compounds are studied as a function of pH. The change in the electronic transition, energy levels, and orbital diagrams of synthesized compounds were investigated by the molecular orbital calculation and were correlated with the experimental spectral emission. Experimental absorption and emission wavelengths are in good agreement with those predicted using the Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT) [B3LYP/6-31G(d)].
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Affiliation(s)
- Vikas S Patil
- Tinctorial Chemistry Group, Institute of Chemical Technology (Formerly UDCT), Matunga, Mumbai, Maharashtra, India.
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Patil VS, Padalkar VS, Phatangare KR, Gupta VD, Umape PG, Sekar N. Synthesis of New ESIPT-Fluorescein: Photophysics of pH Sensitivity and Fluorescence. J Phys Chem A 2011; 116:536-45. [DOI: 10.1021/jp2073123] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vikas S. Patil
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Vikas S. Padalkar
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Kiran R. Phatangare
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Vinod D. Gupta
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Prashant G. Umape
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
| | - Nagaiyan Sekar
- Institute of Chemical Technology (Formerly UDCT), N. P. Marg, Matunga, Mumbai, 400 019 Maharashtra, India
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He L, Zhang L, Liu X, Li X, Zheng M, Li H, Yu K, Chen K, Shen X, Jiang H, Liu H. Discovering Potent Inhibitors Against the β-Hydroxyacyl-Acyl Carrier Protein Dehydratase (FabZ) of Helicobacter pylori: Structure-Based Design, Synthesis, Bioassay, and Crystal Structure Determination. J Med Chem 2009; 52:2465-81. [DOI: 10.1021/jm8015602] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Lingyan He
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Liang Zhang
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaofeng Liu
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xianghua Li
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Mingyue Zheng
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Honglin Li
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Kunqian Yu
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Kaixian Chen
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xu Shen
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Hualiang Jiang
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Hong Liu
- Center for Drug Discovery and Design, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
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Gaggini F, Porcheddu A, Reginato G, Rodriquez M, Taddei M. Colorimetric Tools for Solid-Phase Organic Synthesis. ACTA ACUST UNITED AC 2004; 6:805-10. [PMID: 15360217 DOI: 10.1021/cc049963a] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One of the unresolved problems of solid-phase organic synthesis (SPOS) is the availability of general and rapid methods to monitor the transformation of functional groups present in molecules supported on insoluble supports. Color tests, far from providing the ultimate solution, may help in detection (and sometimes in quantification) of different functional groups. In this short review, we have collected most of the methods available and applied in SPOS with an Experimental Section that describes the procedure we have successfully applied to bead analyses in our laboratories.
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Affiliation(s)
- Francesca Gaggini
- CNR, Istituto di Chimica dei Composti Organo Metallici, c/o Dipartimento di Chimica Organica "Ugo Schiff", Polo Scientifico, Università degli Studi di Firenze, Via della Lastruccia, 13, 50019 Sesto Fiorentino, Italy
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