1
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Substituent control of dynamical process for excited state intramolecular proton transfer of benzothiazole derivatives. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Antony Muthu Prabhu A. Spectral and Theoretical Studies of Benzimidazole and 2-Phenyl Substituted Benzimidazoles. BENZIMIDAZOLE 2022. [DOI: 10.5772/intechopen.101966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This chapter discusses about the spectral and theoretical aspects of selected benzimidazole and 2-phenyl substituted benzimidazole molecules. The synthesis of these benzimidazoles was reported in many methods by the reaction between o-phenylenediamine with formic acid, aromatic aldehydes and N-benzylbezene-1,2-diamine in presence of oxidant tert-butyl hydroperoxide (TBHP). The spectral analysis of these molecules mainly such as UV-visible, fluorescence in solvents will be included in this chapter and discussed about the absorption, fluorescence maximum, conjugation, transition. Further the optimized structure of these molecules will be given using Gaussian 09 W (DFT 6-31G method). And also will be discussed about structural parameters, highest occupied molecular orbital (HOMO) – lowest unoccupied molecular orbital (LUMO) energy energy values, natural bond orbital (NBO), molecular electrostatic potential map (ESP). Many benzimidazole molecules having tautomers in the structure will be explained with the help of theoretical parameters to describe the structural properties.
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3
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Benzimidazoquinazolines as new potent anti-TB chemotypes: Design, synthesis, and biological evaluation. Bioorg Chem 2020; 99:103774. [DOI: 10.1016/j.bioorg.2020.103774] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/16/2020] [Indexed: 02/08/2023]
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4
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Yu Q, Zhang X, Wu ST, Chen H, Zhang QL, Xu H, Huang YL, Zhu BX, Ni XL. Twisted Schiff-base macrocycle showing excited-state intramolecular proton-transfer (ESIPT): assembly and sensing properties. Chem Commun (Camb) 2020; 56:2304-2307. [DOI: 10.1039/c9cc09540c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A Schiff-base macrocyclic host showing ESIPT-based AIEE and nanoparticle assembly.
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Affiliation(s)
- Qing Yu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Xiaodong Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Shou-Ting Wu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Huaiyu Chen
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Qi-Long Zhang
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Hong Xu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Ya-Li Huang
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Bi-Xue Zhu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Xin-Long Ni
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
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5
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Chang K, Liu Y, Liu J, Peng Y, Yang Y, Li Z, Jheng R, Chao C, Liu K, Chou P. Catalytic‐Type Excited‐State N−H Proton‐Transfer Reaction in 7‐Aminoquinoline and Its Derivatives. Chemistry 2019; 25:14972-14982. [DOI: 10.1002/chem.201904027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Kai‐Hsin Chang
- Department of ChemistryNational (Taiwan) University Taipei 10617 Taiwan) (R.O.C
| | - Ying‐Hsuan Liu
- Department of ChemistryNational (Taiwan) University Taipei 10617 Taiwan) (R.O.C
| | - Jiun‐Chi Liu
- Department of ChemistryNational (Taiwan) University Taipei 10617 Taiwan) (R.O.C
| | - Yu‐Chiang Peng
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Yu‐Hsuan Yang
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Zhi‐Bin Li
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Ren‐Hua Jheng
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Chi‐Min Chao
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Kuan‐Miao Liu
- Department of Medical Applied ChemistryChung Shan Medical University andDepartment of Medical EducationChung Shan Medical University Hospital Taichung 40201 Taiwan) (R.O.C
| | - Pi‐Tai Chou
- Department of ChemistryNational (Taiwan) University Taipei 10617 Taiwan) (R.O.C
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6
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Solid state structure and photophysical properties of monoanionic 2-(2′-hydroxyphenyl)benzimidazole as an anionic core in rhenium complex. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.03.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Tang Z, Lu M, Liu K, Zhao Y, Qi Y, Wang Y, Zhang P, Zhou P. Solvation effect on the ESIPT mechanism of 2-(4′-amino-2′-hydroxyphenyl)-1H-imidazo-[4,5-c]pyridine. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.08.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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9
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Suzuki N, Suda K, Yokogawa D, Kitoh-Nishioka H, Irle S, Ando A, Abegão LMG, Kamada K, Fukazawa A, Yamaguchi S. Near infrared two-photon-excited and -emissive dyes based on a strapped excited-state intramolecular proton-transfer (ESIPT) scaffold. Chem Sci 2018; 9:2666-2673. [PMID: 29719675 PMCID: PMC5897875 DOI: 10.1039/c8sc00066b] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 01/26/2018] [Indexed: 12/21/2022] Open
Abstract
Strapped acceptor–π–donor–π–acceptor type fluorophores exhibit intense near infrared emission, together with near infrared two-photon absorption.
Fluorophores that can undergo excited-state intramolecular proton transfer (ESIPT) represent promising scaffolds for the design of compounds that show red-shifted fluorescence. Herein, we disclose new near infrared-emissive materials based on a dialkylamine-strapped 2,5-dithienylpyrrole as an ESIPT scaffold. The introduction of electron-accepting units to the terminal positions of this scaffold generates acceptor–π–donor–π–acceptor (A–π–D–π–A) type π-conjugated compounds. Following the ESIPT, the electron-donating ability of the core scaffold increases, which results in a substantially red-shifted emission in the NIR region, while increasing the oscillator strength. The electron-accepting units play a vital role to achieve intense and red-shifted emission from the ESIPT state. The strapped dialkylamine chain that forms an intramolecular hydrogen bond is also essential to induce the ESIPT. Moreover, an extended A–π–D–π–A skeleton enables two-photon excitation with the NIR light. One of the derivatives that satisfy these features, i.e., borylethenyl-substituted 5, exhibited an intense NIR emission in polar solvents such as acetone (λem = 708 nm, ΦF = 0.55) with a strong two-photon-absorption band in the NIR region.
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Affiliation(s)
- Naoya Suzuki
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Kayo Suda
- Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Daisuke Yokogawa
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Hirotaka Kitoh-Nishioka
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Stephan Irle
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
| | - Akihiro Ando
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan
| | - Luis M G Abegão
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan.,Departamento de Física , Universidade Federal de Sergipe , 49100-000 São Cristovão , SE , Brazil
| | - Kenji Kamada
- IFMRI , National Institute of Advanced Industrial Science and Technology (AIST) , 1-8-31 Midorigaoka, Ikeda , Osaka , 563-8577 , Japan
| | - Aiko Fukazawa
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan
| | - Shigehiro Yamaguchi
- Department of Chemistry , Graduate School of Science and Integrated Research Consortium on Chemical Sciences (IRCCS) , Nagoya University , Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM) , Nagoya University , Furo, Chikusa , Nagoya , 464-8602 , Japan
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10
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Jang YJ, Hwang SH, Choi TL. Iridium-Catalyzed Direct C−H Amidation Polymerization: Step-Growth Polymerization by C−N Bond Formation via C−H Activation to Give Fluorescent Polysulfonamides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yoon-Jung Jang
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
| | - Soon-Hyeok Hwang
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
| | - Tae-Lim Choi
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
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11
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Jang YJ, Hwang SH, Choi TL. Iridium-Catalyzed Direct C−H Amidation Polymerization: Step-Growth Polymerization by C−N Bond Formation via C−H Activation to Give Fluorescent Polysulfonamides. Angew Chem Int Ed Engl 2017; 56:14474-14478. [DOI: 10.1002/anie.201707446] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 09/06/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Yoon-Jung Jang
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
| | - Soon-Hyeok Hwang
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
| | - Tae-Lim Choi
- Department of Chemistry; Seoul National University; Seoul 08826 South Korea
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12
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An M, Kim BY, Seo H, Helal A, Kim HS. Fluorescence sensor for sequential detection of zinc and phosphate ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 169:87-94. [PMID: 27343439 DOI: 10.1016/j.saa.2016.06.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 04/28/2016] [Accepted: 06/17/2016] [Indexed: 06/06/2023]
Abstract
A new, highly selective turn-on fluorescent chemosensor based on 2-(2'-tosylamidophenyl)thiazole (1) for the detection of zinc and phosphate ions in ethanol was synthesized and characterized. Sensor 1 showed a high selectivity for zinc compared to other cations and sequentially detected hydrogen pyrophosphate and hydrogen phosphate. The fluorescence mechanism can be explained by two different mechanisms: (i) the inhibition of excited-state intramolecular proton transfer (ESIPT) and (ii) chelation-induced enhanced fluorescence by binding with Zn(2+). The sequential detection of phosphate anions was achieved by the quenching and subsequent revival of ESIPT.
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Affiliation(s)
- Miran An
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Bo-Yeon Kim
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hansol Seo
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Aasif Helal
- Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Hong-Seok Kim
- Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
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13
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Skonieczny K, Yoo J, Larsen JM, Espinoza EM, Barbasiewicz M, Vullev VI, Lee CH, Gryko DT. How To Reach Intense Luminescence for Compounds Capable of Excited-State Intramolecular Proton Transfer? Chemistry 2016; 22:7485-96. [PMID: 27062363 DOI: 10.1002/chem.201504944] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Indexed: 01/03/2023]
Abstract
Photoinduced intramolecular direct arylation allows structurally unique compounds containing phenanthro[9',10':4,5]imidazo[1,2-f]phenanthridine and imidazo[1,2-f]phenanthridine skeletons, which mediate excited-state intramolecular proton transfer (ESIPT), to be efficiently synthesized. The developed polycyclic aromatics demonstrate that the combination of five-membered ring structures with a rigid arrangement between a proton donor and a proton acceptor provides a means for attaining large fluorescence quantum yields, exceeding 0.5, even in protic solvents. Steady-state and time-resolved UV/Vis spectroscopy reveals that, upon photoexcitation, the prepared protic heteroaromatics undergo ESIPT, converting them efficiently into their excited-state keto tautomers, which have lifetimes ranging from about 5 to 10 ns. The rigidity of their structures, which suppresses nonradiative decay pathways, is believed to be the underlying reason for the nanosecond lifetimes of these singlet excited states and the observed high fluorescence quantum yields. Hydrogen bonding with protic solvents does not interfere with the excited-state dynamics and, as a result, there is no difference between the occurrences of ESIPT processes in MeOH versus cyclohexane. Acidic media has a more dramatic effect on suppressing ESIPT by protonating the proton acceptor. As a result, in the presence of an acid, a larger proportion of the fluorescence of ESIPT-capable compounds originates from their enol excited states.
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Affiliation(s)
- Kamil Skonieczny
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224, Warsaw, Poland.,Department of Bioengineering, University of California, Riverside, CA, 92521, USA
| | - Jaeduk Yoo
- Department of Chemistry, Kangwon National University, Chuncheon, 23417, Republic of Korea
| | - Jillian M Larsen
- Department of Bioengineering, University of California, Riverside, CA, 92521, USA
| | - Eli M Espinoza
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Michał Barbasiewicz
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Valentine I Vullev
- Department of Bioengineering, University of California, Riverside, CA, 92521, USA. .,Department of Chemistry, University of California, Riverside, CA, 92521, USA.
| | - Chang-Hee Lee
- Department of Chemistry, Kangwon National University, Chuncheon, 23417, Republic of Korea.
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224, Warsaw, Poland.
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14
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Mukhina OA, Kutateladze AG. Oxazolines as Dual-Function Traceless Chromophores and Chiral Auxiliaries: Enantioselective Photoassisted Synthesis of Polyheterocyclic Ketones. J Am Chem Soc 2016; 138:2110-3. [PMID: 26866604 PMCID: PMC5578731 DOI: 10.1021/jacs.5b12690] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
2-(o-Amidophenyl)oxa- and -thiazolines undergo excited-state intramolecular proton transfer (ESIPT), generating aza-o-xylylenes capable of intramolecular [4+2] and [4+4] cycloadditions with tethered unsaturated pendants. Facile hydrolysis of the primary photoproducts, spiro-oxazolidines and thiazolidines, under mild conditions unmasks a phenone functionality. Variations in linkers allow for access to diverse core scaffolds in the primary photoproducts, rendering the approach compatible with the philosophy of diversity-oriented synthesis. Chiral oxazolines, readily available from the corresponding amino alcohols, yield enantioenriched keto-polyheterocycles of complex topologies with enantiomeric excess values up to 90%.
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Affiliation(s)
- Olga A. Mukhina
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
| | - Andrei G. Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, 2190 E. Iliff Ave. Denver, CO 80208-2436 (USA)
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15
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New armed near-IR two-photon organic chromophores undergoing ESIPT and ‘naked eye’ fluorescence sensing to zinc ions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Liu K, Zhao X, Liu Q, Huo J, Wang X, Wu Y. Investigation on the photophysical properties of ESPT inspired salicylaldehyde-based sensor for fluoride sensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:198-201. [PMID: 25594213 DOI: 10.1016/j.saa.2014.12.092] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 12/02/2014] [Accepted: 12/15/2014] [Indexed: 06/04/2023]
Abstract
A simple, highly selective and sensitive chemosensor (E)-2-((quinolin-8-ylimino) methyl) phenol (QP) has been developed for the fluoride, as demonstrated by the photophysical properties obtained by UV-vis and fluorescent methods. Excited-state inter/intramolecular proton transfer (ESPT) was suggested to be responsible for the fluoride-induced 'turn on' fluorescence and the blue shift of 25 nm in the emission spectrum.
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Affiliation(s)
- Kai Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China.
| | - Xiaojun Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Qingxiang Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
| | - Jianzhong Huo
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China
| | - Xing Wang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin 300387, China
| | - Yanping Wu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
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17
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Stasyuk AJ, Cyrański MK, Gryko DT, Solà M. Acidic C–H Bond as a Proton Donor in Excited State Intramolecular Proton Transfer Reactions. J Chem Theory Comput 2015; 11:1046-54. [DOI: 10.1021/ct501100t] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Anton J. Stasyuk
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Department
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Michał K. Cyrański
- Department
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Daniel T. Gryko
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Institute of Organic Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Miquel Solà
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia, Spain
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18
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Turn on ESPT: Novel salicylaldehyde based sensor for biological important fluoride sensing. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 138:75-9. [DOI: 10.1016/j.jphotobiol.2014.05.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 04/26/2014] [Accepted: 05/05/2014] [Indexed: 11/19/2022]
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19
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Jayabharathi J, Vimal K, Thanikachalam V, Kalaiarasi V. Photophysical and excited-state intramolecular proton transfer of 2-(1-(3,5-dimethylphenyl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenol: DFT analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 125:290-296. [PMID: 24561576 DOI: 10.1016/j.saa.2014.01.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/22/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
Fluorescent phenenthrimidazole derivatives have been synthesized and characterized by (1)H, (13)C NMR and mass spectral analyses. Synthesized compounds have been. The solvent effect on the absorption and fluorescence bands has been analyzed and supplement by computational studies. Phenenthrimidazole containing hydroxy group shows a single prominent absorption and emission in polar solvents and dual emission in non-polar solvents due to excited state intramolecular proton transfer (ESIPT). The ESIPT of 2-(1-(3,5-dimethylphenyl)-1H-phenanthro[9,10-d]imidazol-2-yl)phenol was cross validated by the analysis of optimized geometry parameters, potential energy surface (PES), mulliken's charge distribution on the heavy atoms and molecular orbitals of its tautomers. Nonviability of ground state electron transfer was explained by HOMO-LUMO analysis. The intramolecular hydrogen bonding (IMHB) interaction has been explored by the calculation of electron density ρ(r) and the Laplacian Δ(2)ρ(r) at the bond critical point (BCP) using atoms-in-molecule (AIM) method and by calculation of hyper conjugative interaction between N17 lone pair and σ*(O53⋯H54) using natural bond orbital (NBO) analysis.
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Affiliation(s)
- J Jayabharathi
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India.
| | - K Vimal
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
| | - V Thanikachalam
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
| | - V Kalaiarasi
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
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Fukazawa A, Osaki H, Yamaguchi S. Hydroxyphenyl-Substituted Benzophosphole Oxides: Impact of the Intramolecular Hydrogen Bond on the Fluorescence Properties. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300227] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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21
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Helal A, Kim HG, Ghosh MK, Choi CH, Kim SH, Kim HS. New regioisomeric naphthol–thiazole based ‘turn-on’ fluorescent chemosensor for Al3+. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Chipem FAS, Krishnamoorthy G. Temperature Effect on Dual Fluorescence of 2-(2′-Hydroxyphenyl)benzimidazole and Its Nitrogen Substituted Analogues. J Phys Chem B 2013; 117:14079-88. [DOI: 10.1021/jp405804c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Francis A. S. Chipem
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, India
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23
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Jayabharathi J, Thanikachalam V, Kalaiarasi V, Jayamoorthy K. Optical properties of 1-(4,5-diphenyl-1-p-tolyl-1H-imidazol-2-yl)naphthalen-2-ol--ESIPT process. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 120:389-394. [PMID: 24211620 DOI: 10.1016/j.saa.2013.10.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 09/28/2013] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
This article presents optical, electrochemical, and thermal properties of novel class of green fluorescent 1-(4,5-diphenyl-1-p-tolyl-1H-imidazol-2-yl)naphthalen-2-ol. Detailed photo physical and quantum chemical studies have been performed to elucidate the excited state intramolecular proton transfer (ESIPT) reaction leading a large stokes shifted fluorescence emission from the phototautomer. The results of quantum chemical investigations confirmed the intramolecular charge transfer characteristics of the ESIPT tautomers. The high photoluminescence quantum yield is ascribed to twisted chromophores due to phenyl substituents at 1,2-position of the imidazole ring which restricted intramolecular motion, leading to an optically allowed lowest optical transition without self quenching.
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Affiliation(s)
- J Jayabharathi
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India.
| | - V Thanikachalam
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
| | - V Kalaiarasi
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
| | - K Jayamoorthy
- Department of Chemistry, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
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Kanagaraj K, Pitchumani K. Highly selective "turn-on" fluorescent and colorimetric sensing of fluoride ion using 2-(2-hydroxyphenyl)-2,3-dihydroquinolin-4(1H)-one based on excited-state proton transfer. Chem Asian J 2013; 9:146-52. [PMID: 24347072 DOI: 10.1002/asia.201300816] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/05/2013] [Indexed: 01/25/2023]
Abstract
A simple, highly selective and sensitive colorimetric system for the detection of fluoride ion in an aqueous medium has been developed using 2-(2-hydroxyphenyl)-2,3-dihydroquinolin-4(1H)-one. This system allows selective "turn-on" fluorescence detection of fluoride ion, which is found to be dependent upon guest basicity. An excited-state proton transfer is proposed to be the signaling mechanism, which is rationalized by DFT and TD-DFT calculations. The present sensor can also be applied to detect fluoride levels in real water samples.
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Affiliation(s)
- Kuppusamy Kanagaraj
- School of Chemistry, Madurai Kamaraj University, Madurai 625 021 (India), Fax: (+91) 452-2459181, Fax: (+91) 452-2459105
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25
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Tian M, Wang C, Wang L, Luo K, Zhao A, Guo C. Study on the synthesis and structure-effect relationship of multi-aryl imidazoles with their fluorescence properties. LUMINESCENCE 2013; 29:540-8. [DOI: 10.1002/bio.2580] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 07/08/2013] [Accepted: 08/05/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Mi Tian
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
| | - Chao Wang
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
| | - LiGong Wang
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
| | - Kai Luo
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
| | - An Zhao
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
| | - CanCheng Guo
- College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Hunan China
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26
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Structural, Electronic and Charge Transfer Studies of Highly Sensitive Fluorescent Probe 2-((E)-2-(1-phenyl-1H-phenanthro[9,10-d]imidazol-2-yl)vinyl)phenol: Quantum Chemical Investigations. J Fluoresc 2013; 24:377-87. [DOI: 10.1007/s10895-013-1302-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Accepted: 09/11/2013] [Indexed: 10/26/2022]
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27
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Ciuciu AI, Flamigni L, Skonieczny K, Gryko DT. Blue-green emitting sulphonamido-imidazole derivatives: ESIPT based excited state dynamics. Phys Chem Chem Phys 2013; 15:16907-16. [PMID: 24002612 DOI: 10.1039/c3cp52291a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six imidazole derivatives characterized by the presence in their molecules of a sulphonamido group and able to display excited state intramolecular proton transfer (ESIPT) have been synthesized in a straightforward manner and the dynamics of their excited states investigated in detail in solvents of different polarity and proticity: toluene (TOL), dichloromethane (DCM) and methanol (MeOH). With the exception of one compound, these ESIPT-capable molecules are highly luminescent. The major emitting species at room temperature is the ketimine (K) tautomer but the weak emission from the enamide (E) form was detected in several cases. In general, the luminescence quantum yields (φfl) of the K form range between 0.4 and 0.6 with lifetimes of several nanoseconds, with radiative rate constants kr of the order of 10(8) s(-1). The lifetime of the E form, and hence of the ESIPT process, range between τ <10 ps up to 190 ps. At 77 K, in addition to hypsochromically shifted fluorescence bands from the E and/or K tautomers, E phosphorescence emissions with lifetimes in the range of seconds (0.4-2.5 s) are also detected. The triplet excited state absorbance of these molecules was probed in DCM and MeOH and both E (between 450-520 nm) and K (at about 420 nm) forms were identified. The triplet lifetimes at room temperature in air-free solutions are in the microsecond range, whereas the reaction rates with oxygen are of the order of 10(9) M(-1) s(-1).
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Affiliation(s)
- Adina I Ciuciu
- Istituto per la Sintesi Organica e Fotoreattivita' (ISOF), CNR, Via P. Gobetti 101, 40129 Bologna, Italy.
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28
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Goswami S, Das AK, Aich K, Manna A. Competitive intra- and inter-molecular proton transfer in hydroxynaphthyl benzothiazole: selective ratiometric sensing of acetate. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.119] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Azadbakht R, Almasi T, Keypour H, Rezaeivala M. A new asymmetric Schiff base system as fluorescent chemosensor for Al3+ ion. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.03.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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30
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Mutai T, Sawatani H, Shida T, Shono H, Araki K. Tuning of Excited-State Intramolecular Proton Transfer (ESIPT) Fluorescence of Imidazo[1,2-a]pyridine in Rigid Matrices by Substitution Effect. J Org Chem 2013; 78:2482-9. [DOI: 10.1021/jo302711t] [Citation(s) in RCA: 163] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Toshiki Mutai
- Department of Materials and Environmental Science,
Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Hirotaka Sawatani
- Department of Materials and Environmental Science,
Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Toshihide Shida
- Department of Materials and Environmental Science,
Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Hideaki Shono
- Department of Materials and Environmental Science,
Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Koji Araki
- Department of Materials and Environmental Science,
Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
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31
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Topal SZ, Önal E, Gürek AG, Hirel C. pH-induced “off–on–off” type molecular switch behaviors of zinc and free tetraimidazophthalocyanines. Dalton Trans 2013; 42:11528-36. [DOI: 10.1039/c3dt51055g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Molander GA, Ajayi K. Oxidative condensations to form benzimidazole-substituted potassium organotrifluoroborates. Org Lett 2012; 14:4242-5. [PMID: 22873832 PMCID: PMC3428750 DOI: 10.1021/ol301956p] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A library of benzimidazole-substituted potassium organotrifluoroborates was prepared via the condensation of various potassium formyl-substituted aryl- and heteroaryltrifluoroborates with aromatic 1,2-diamines under oxidative conditions. The efficient Suzuki-Miyaura cross-coupling of products thus formed to various aryl and heteroaryl bromides was achieved in good yields. The method allows the facile preparation of benzimidazole-containing triaromatic products in two steps from simple potassium formyl substituted aryl- or heteroaryltrifluoroborates.
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Affiliation(s)
- Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States.
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33
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Nayak MK. Synthesis, characterization and optical properties of aryl and diaryl substituted phenanthroimidazoles. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.05.018] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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McCutcheon DC, Paley MA, Steinhardt RC, Prescher JA. Expedient synthesis of electronically modified luciferins for bioluminescence imaging. J Am Chem Soc 2012; 134:7604-7. [PMID: 22519459 PMCID: PMC3613990 DOI: 10.1021/ja301493d] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Bioluminescence imaging with luciferase enzymes requires access to light-emitting, small-molecule luciferins. Here, we describe a rapid method to synthesize d-luciferin, the substrate for firefly luciferase (Fluc), along with a novel set of electronically modified analogues. Our procedure utilizes a relatively rare, but synthetically useful dithiazolium reagent to generate heteroaromatic scaffolds in a divergent fashion. Two of the luciferin analogues produced with this approach emit light with Fluc in vitro and in live cells. Collectively, our work increases the number of substrates that can be used for bioluminescence imaging and provides a general strategy for synthesizing new collections of luciferins.
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Affiliation(s)
- David C. McCutcheon
- Department of Chemistry, University of California, Irvine, CA 92697
- Department of Pharmaceutical Science, University of California, Irvine, CA 92697
| | - Miranda A. Paley
- Department of Chemistry, University of California, Irvine, CA 92697
| | | | - Jennifer A. Prescher
- Department of Chemistry, University of California, Irvine, CA 92697
- Department of Molecular Biology & Biochemistry, University of California, Irvine, CA 92697
- Department of Pharmaceutical Science, University of California, Irvine, CA 92697
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35
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Tanakit A, Rouffet M, Martin DP, Cohen SM. Investigating chelating sulfonamides and their use in metalloproteinase inhibitors. Dalton Trans 2012; 41:6507-15. [PMID: 22411188 DOI: 10.1039/c2dt12373h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Matrix metalloproteinase inhibitors (MMPi) utilize zinc-binding groups (ZBGs) to chelate the catalytic Zn(II) ion resulting in enzyme inhibition. Adapting findings from the literature of Zn(II) ion sensors, we previously reported chelating sulfonamide inhibitors of MMP-2, some of which showed excellent selectivity over other gelatinases (MMP-9). Herein, we greatly expand our investigation of chelating sulfonamides as MMP inhibitors (MMPi) with the synthesis and screening of several new libraries consisting of 2-phenyl-7-sulfonamidobenzimidazole, 2-phenyl-7-sulfonamidobenzoxazole, 7-sulfonamidobenzimidazole, 7-sulfonamidobenzoxazole, and 2-(2-sulfonamidophenyl)-quinoline ZBG derivatives. A novel microwave irradiation synthetic procedure was utilized to rapidly and efficiently prepare these molecules. To better understand the coordination chemistry underlying these ZBGs, crystal structures of representative molecules with several first row transition metals were determined and differences in coordination preferences were considered. Surprisingly, only compounds with the 2-phenyl-7-sulfonamidobenzimidazole ZBG showed inhibition of MMP-2, suggesting that the specific structure of the ZBG can have a pronounced effect of inhibitory activity.
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Affiliation(s)
- Alisa Tanakit
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, USA
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36
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Konoshima H, Nagao S, Kiyota I, Amimoto K, Yamamoto N, Sekine M, Nakata M, Furukawa K, Sekiya H. Excited-state intramolecular proton transfer and charge transfer in 2-(2′-hydroxyphenyl)benzimidazole crystals studied by polymorphs-selected electronic spectroscopy. Phys Chem Chem Phys 2012; 14:16448-57. [DOI: 10.1039/c2cp42686b] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Skonieczny K, Ciuciu AI, Nichols EM, Hugues V, Blanchard-Desce M, Flamigni L, Gryko DT. Bright, emission tunable fluorescent dyes based on imidazole and π-expanded imidazole. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33891b] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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38
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Helal A, Rashid MHO, Choi CH, Kim HS. New regioisomeric naphthol-substituted thiazole based ratiometric fluorescence sensor for Zn2+ with a remarkable red shift in emission spectra. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.106] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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39
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Luxami V, Kumar S. ESIPT based dual fluorescent sensor and concentration dependent reconfigurable boolean operators. RSC Adv 2012. [DOI: 10.1039/c2ra21170j] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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40
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Abstract
Numerous metalloproteins are important therapeutic targets that are gaining increased attention in the medicinal and bioinorganic chemistry communities. This Perspective article describes some emerging trends and recent findings in the area of metalloprotein inhibitor discovery and development. In particular, increasing recognition of the importance of the metal-ligand interactions in these systems calls for more input and consideration from the bioinorganic community to address questions traditionally confined to the medicinal chemistry community.
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Affiliation(s)
| | - Seth M. Cohen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, U.S.A. Fax: 858-822-5598; Tel: 858-822-5596
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41
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Yao D, Zhao S, Guo J, Zhang Z, Zhang H, Liu Y, Wang Y. Hydroxyphenyl-benzothiazole based full color organic emitting materials generated by facile molecular modification. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm00009h] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Helal A, Kim SH, Kim HS. Thiazole sulfonamide based ratiometric fluorescent chemosensor with a large spectral shift for zinc sensing. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.10.055] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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The Concept of λ-Ratiometry in Fluorescence Sensing and Imaging. J Fluoresc 2010; 20:1099-128. [DOI: 10.1007/s10895-010-0644-y] [Citation(s) in RCA: 170] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 03/16/2010] [Indexed: 11/25/2022]
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44
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Abstract
Metal-responsive fluorescent indicators are powerful tools for visualizing trace metals with subcellular resolution. By taking advantage of the diverse photophysical properties of organic fluorophores, metal ion-selective fluorescent indicators have been rationally designed and tailored towards cellular applications. This review summarizes challenges associated with the probe design and describes recent efforts in our research group in developing selective and sensitive reagents for the detection of zinc and copper in mammalian cells.
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Affiliation(s)
- Christoph J. Fahrni
- Correspondence: Prof. Dr. C.J. Fahrni, Georgia Institute of Technology, School of Chemistry and Biochemistry, and Petit Institute for Bioengineering and Bioscience, 901 Atlantic Drive, Atlanta, GA 30332-0400, Tel.: +1 404 385-1164, Fax: + 1 404 894-2295,
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45
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Yan YN, Lin DY, Pan WL, Li XL, Wan YQ, Mai YL, Song HC. Synthesis and optical behaviors of 2-(9-phenanthrenyl)-, 2-(9-anthryl)-, and 2-(1-pyrenyl)-1-alkylimidazole homologues. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:233-242. [PMID: 19577952 DOI: 10.1016/j.saa.2009.06.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2008] [Revised: 06/06/2009] [Accepted: 06/07/2009] [Indexed: 05/28/2023]
Abstract
Eight 2-(9-phenanthrenyl)-, 2-(9-anthryl)- and 2-(1-pyrenyl)-1-alkyl-benzimidazole compounds, three 2-(9-anthryl)-1-alkylphenanthroimidazole compounds and five 4,5-diphenyl-1-alkyl-2-(9-anthryl)imidazole compounds were synthesized by alkylation reactions of the corresponding benzimidazole, phenanthroimidazole or imidazole compounds. 2-(10-Bromo-9-anthryl)-1-alkyl-benzimidazole compounds were prepared by bromination reaction of 2-(9-anthryl)-1-alkylbenzimidazole compounds. All the synthesized compounds were characterized by elemental analysis, (1)H NMR, (13)C NMR, MS or HRMS; their absorption coefficients (epsilon), maximum absorption lambda(amax), fluorescence emission maximum lambda(em), Stokes shifts and fluorescence quantum yields (Phi(F)) in ethyl acetate were determined; their fluorescent lifetimes (T(1) and T(2)) were measured in ethyl acetate and in solid state, respectively. The crystal structure of 2-(9-anthryl)-1-n-butyl-4,5-diphenylimidazole (12a) was determined to be triclinic, space group P-1 types, using single crystal X-ray crystallography technique. The results showed that these compounds exhibited moderate fluorescence-emission abilities and higher solubility in most organic solvents than their corresponding starting materials. The relationships between the optical behaviors and structures for these compounds were discussed.
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Affiliation(s)
- Yun-Nan Yan
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
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46
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Jin R, Zhang J. Substituent effects in the tuning of excited-state intramolecular proton transfer and optical properties of the derivatives of 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0613-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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47
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Montagnese T, Ogliaro F, Wilsey S, Bearpark MJ. Inertial Effects on the Intramolecular Vibrational Energy Redistribution and Nonadiabatic Photoisomerization of a 2,3-Substituted 1,3-Butadiene: A Quasi-Classical CASSCF Dynamics Study. J Phys Chem A 2008; 112:13239-43. [DOI: 10.1021/jp803751b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tony Montagnese
- Equipe de Chimie et Biochimie Théoriques, UMR 7565 - CNRS, Université Henri Poincaré, Nancy 1, 54506 Vandoeuvre-lès-Nancy, France, and Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - François Ogliaro
- Equipe de Chimie et Biochimie Théoriques, UMR 7565 - CNRS, Université Henri Poincaré, Nancy 1, 54506 Vandoeuvre-lès-Nancy, France, and Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Sarah Wilsey
- Equipe de Chimie et Biochimie Théoriques, UMR 7565 - CNRS, Université Henri Poincaré, Nancy 1, 54506 Vandoeuvre-lès-Nancy, France, and Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
| | - Michael J. Bearpark
- Equipe de Chimie et Biochimie Théoriques, UMR 7565 - CNRS, Université Henri Poincaré, Nancy 1, 54506 Vandoeuvre-lès-Nancy, France, and Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, U.K
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