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Guesmi NE. Solvent Effect on the Photophysical Properties of Terpyridine Incorporating Pyrene Moiety: Estimation of Dipole Moments by Solvatochromic Shift Methods. J Fluoresc 2023; 33:2315-2326. [PMID: 37036630 DOI: 10.1007/s10895-023-03210-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/09/2023] [Indexed: 04/11/2023]
Abstract
The absorption and fluorescence emission spectra of terpyridine incorporating pyrene moiety (Tpy-pyr) have been recorded in extensive variety of solvents having different polarities. The effect of the solvent on the spectral characteristics are examined. It is shown that Tpy-pyr exhibit positive solvatochromism, large Stokes shift values in polar solvents, and fluorescence in the long wavelength region of the visible range. A linear increasing trend with Stokes shift indicates the presence of Tpy-pyr - solvent interaction. The acquired results could be attributed to the formation of excited states with intramolecular charge transfer. The fluorescence quantum yield was drastically reduced in polar protic solvents and the formation of the twisted states with charge transfer was proposed. Both ground and excited state dipole moments (µg and µe) were determined experimentally by Lippert-Mataga, Reichardt, Bilot-Kawski, Bakhshiev and Kawski-Chamma-Viallet solvatochromic methods analyzed on the base of the microscopic solvent polarity functions. The µg and µe dipole moment of Tpy-pyr estimated from density functional theory (DFT) and those determined experimentally from solvatochromic methods are compared and the results are discussed.
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Affiliation(s)
- Nizar El Guesmi
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, 21955, Makkah, Saudi Arabia.
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Thomas A, Kirilova EM, Nagesh B, Manohara S, Siddlingeshwar B, Belyakov SV. Synthesis, solvatochromism and DFT study of pyridine substituted benzanthrone with ICT characteristi. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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3
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Sarrato J, Pinto AL, Malta G, Röck EG, Pina J, Lima JC, Parola AJ, Branco PS. New 3-Ethynylaryl Coumarin-Based Dyes for DSSC Applications: Synthesis, Spectroscopic Properties, and Theoretical Calculations. Molecules 2021; 26:molecules26102934. [PMID: 34069210 PMCID: PMC8156968 DOI: 10.3390/molecules26102934] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/07/2021] [Accepted: 05/10/2021] [Indexed: 11/27/2022] Open
Abstract
A set of 3-ethynylaryl coumarin dyes with mono, bithiophenes and the fused variant, thieno [3,2-b] thiophene, as well as an alkylated benzotriazole unit were prepared and tested for dye-sensitized solar cells (DSSCs). For comparison purposes, the variation of the substitution pattern at the coumarin unit was analyzed with the natural product 6,7-dihydroxycoumarin (Esculetin) as well as 5,7-dihydroxycomarin in the case of the bithiophene dye. Crucial steps for extension of the conjugated system involved Sonogashira reaction yielding highly fluorescent molecules. Spectroscopic characterization showed that the extension of conjugation via the alkynyl bridge resulted in a strong red-shift of absorption and emission spectra (in solution) of approximately 73–79 nm and 52–89 nm, respectively, relative to 6,7-dimethoxy-4-methylcoumarin (λabs = 341 nm and λem = 410 nm). Theoretical density functional theory (DFT) calculations show that the Lowest Unoccupied Molecular Orbital (LUMO) is mostly centered in the cyanoacrylic anchor unit, corroborating the high intramolecular charge transfer (ICT) character of the electronic transition. Photovoltaic performance evaluation reveals that the thieno [3,2-b] thiophene unit present in dye 8 leads to the best sensitizer of the set, with a conversion efficiency (η = 2.00%), best VOC (367 mV) and second best Jsc (9.28 mA·cm−2), surpassed only by dye 9b (Jsc = 10.19 mA·cm−2). This high photocurrent value can be attributed to increased donor ability of the 5,7-dimethoxy unit when compared to the 6,7 equivalent (9b).
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Affiliation(s)
- João Sarrato
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
| | - Ana Lucia Pinto
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
| | - Gabriela Malta
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
| | - Eva G. Röck
- Department of Chemistry, Coimbra Chemistry Centre, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal; (E.G.R.); (J.P.)
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - João Pina
- Department of Chemistry, Coimbra Chemistry Centre, University of Coimbra, Rua Larga, 3004-535 Coimbra, Portugal; (E.G.R.); (J.P.)
| | - João Carlos Lima
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
| | - A. Jorge Parola
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
- Correspondence: (A.J.P.); (P.S.B.); Tel.: +351-21-294-8300 (P.S.B.)
| | - Paula S. Branco
- LAQV-REQUIMTE, Departament of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal; (J.S.); (A.L.P.); (G.M.); (J.C.L.)
- Correspondence: (A.J.P.); (P.S.B.); Tel.: +351-21-294-8300 (P.S.B.)
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Rosli M, Basar N, Mohd Rozi N, Krishnan G, Harun S, Sazali E, Aziz M. The study and comparison of power-dependent nonlinear optical behaviours of α-mangostin with Sheik-Bahae formalism and thermal lens model using Z-Scan technique. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.113034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Bhalekar SB, Bhagwat AA, Sekar N. Orange-Red Fluorescent (Partially Rigidified) Donor-π-(rigidified)-Acceptor System – Computational Studies. J Fluoresc 2020; 30:565-579. [DOI: 10.1007/s10895-020-02506-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 02/06/2020] [Indexed: 10/24/2022]
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Bhalekar SB, Kothavale S, Sekar N. Coumarin and Hydroxyl Decorated Viscosity Sensitive Triphenylamine Derivatives: Synthesis, Photophysical Properties, Viscosity Sensitivity, TD‐DFT, and NLO Properties. ChemistrySelect 2019. [DOI: 10.1002/slct.201903247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sulochana B. Bhalekar
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
| | - Shantaram Kothavale
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
| | - Nagaiyan Sekar
- Department of Dyestuff TechnologyInstitute of Chemical Technology, Matunga, Mumbai India
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Ayare NN, Sreenath MC, Chitrambalam S, Joe IH, Sekar N. NLO characteristics of D-π-A coumarin-thiophene bridged azo dyes by Z-scan and DFT methods. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1662127] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Nitesh N. Ayare
- Dyestuff Technology Department, Institute of Chemical Technology, Mumbai, India
| | - Mavila C. Sreenath
- Department of Physics, Mar Ivanios College, Centre for Molecular and Biophysics Research, Thiruvananthapuram, India
| | - Subramaniyan Chitrambalam
- Department of Physics, Mar Ivanios College, Centre for Molecular and Biophysics Research, Thiruvananthapuram, India
| | - Isaac H. Joe
- Department of Physics, Mar Ivanios College, Centre for Molecular and Biophysics Research, Thiruvananthapuram, India
| | - Nagaiyan Sekar
- Dyestuff Technology Department, Institute of Chemical Technology, Mumbai, India
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Triphenylamine and N-phenyl carbazole-based coumarin derivatives: Synthesis, solvatochromism, acidochromism, linear and nonlinear optical properties. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111937] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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