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Chowdhury A, Dasgupta S, Gaur N, Shukla A, Adhyapak P, Kabra D, Datta A. Modulation of fluorescence and phosphorescence of organoboron compounds from ortho-substituted phenolic Schiff bases by structural modification. Photochem Photobiol 2024; 100:1089-1099. [PMID: 38801138 DOI: 10.1111/php.13965] [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: 02/18/2024] [Revised: 04/20/2024] [Accepted: 04/30/2024] [Indexed: 05/29/2024]
Abstract
Light emission from organoboron compounds of Schiff bases is found to depend strongly on their chemical structure. Two of these compounds (OB1 and OB2), which contain a benzene ring between the Schiff base moieties, exhibit weak fluorescence in methanol, with marked viscosity dependence. Fluorescence lifetimes of these compounds are in picosecond timescale, as determined by femtosecond optical gating (FOG). A significant enhancement in fluorescence intensity and lifetime is observed at 77 K, indicating the operation of an activated nonradiative process. Using fluorescence lifetime imaging microscopy (FLIM), OB1 and OB2 are shown to be potential membrane probes. The third (OB3), which is devoid of this benzene ring, exhibits relatively stronger fluorescence with nanosecond lifetimes at room temperature. No viscosity dependence is observed in this case. The emission spectrum at 77 K is markedly more intense and exhibits an additional red shifted structured feature, which persists for a few seconds. Hence, OB3 seems to have greater promise not only as fluorescent probe but also for light harvesting. The marked improvement of the light emission properties of OB3 compared with OB1 and OB2 is likely to serve as a pointer for the design of Schiff base-derived organoboron luminophores with diverse potential applications.
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Affiliation(s)
- Arkaprava Chowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Souradip Dasgupta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Nrita Gaur
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India
| | - Aparna Shukla
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Dhanbad, India
| | - Pranav Adhyapak
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
| | - Dinesh Kabra
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, India
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Hu L, Sun C, Cheng R, Gao X, Zhou J, Wang Y, Jiang R, Zhu X, Liu P, Yan Z. A high-performance fluorescent and ratiometric colorimetric detection of Cu 2+ in practice. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4656-4662. [PMID: 37667675 DOI: 10.1039/d3ay01082a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
To monitor Cu2+ efficiently, a kind of D-π-A-π-D conjugated 3,5-di-(2-hydroxyl naphthaldehyde)-iminyl triazole (HNIT) was developed, using triazole as the electron acceptor, 2-hydroxyl naphthaline as the electron donor, and -CN- as the bridging group. The proposed HNIT possessed superior UV-vis and fluorescent spectral property with high molar absorption coefficient of 2.313 × 104 L mol-1 cm-1 and fluorescence quantum yield of 36.2%. Trace Cu2+ could exclusively alter its UV-vis and fluorescent property with clear color change. Under the optimized conditions, a high-performance fluorescent and ratiometric colorimetric detection of Cu2+ based on HNIT was efficient, with low detection limits of 3.3 × 10-8 mol L-1 (S/N = 3) and 9.6 × 10-8 mol L-1 (S/N = 3), respectively. It well satisfied with the safe value of 31.5 μM Cu2+ in drinking water recommended by World Health Organization (WHO). When applied for detection of Cu2+ in real environmental samples, the recovery was in the range of 97.5-105.2%. The recognition mechanism for HNIT to Cu2+ realized quite stable 6-membered rings between electron-deficient Cu2+ and electron-rich N and O atoms in HNIT with 1 : 2 chemical stoichiometry of HNIT to Cu2+.
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Affiliation(s)
- Lei Hu
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Chengjie Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Renxiang Cheng
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Xinhong Gao
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Jiayi Zhou
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Yi Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Ruping Jiang
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Xiao Zhu
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Peng Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
| | - Zhengquan Yan
- School of Chemistry and Chemical Engineering, Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, Qufu Normal University, Qufu, 273165, China.
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Krishnan U, Manickam S, Kulathu Iyer S. Selective detection of BF3 in living cells and environmental water samples using Schiff-base fluorescent probe. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Enbanathan S, Manickam S, Dhanthala Thiyagarajan M, Jothi D, Manojkumar S, Munusamy S, Murugan D, Rangasamy L, Balijapalli U, Kulathu Iyer S. Rational design of diphenyl-λ5σ4-phosphinine based fluorescent probe for the selective detection of Hg2+ ions: Real application in cell imaging and paper strips. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sha C, Li Z, Lu S, Hu X, Xu D. A dansyl-based fluorescent probe for turn-off and turn-on detection of Hg2+ in a full water system. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04846-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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