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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. [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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2
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Polymeric REE coordination compounds based on novel enaminone derivative. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Synthesis and photophysical investigations of pyridine-pyrazolate bound boron(III) diaryl complexes. Sci Rep 2022; 12:16482. [PMID: 36183021 PMCID: PMC9526719 DOI: 10.1038/s41598-022-20796-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/19/2022] [Indexed: 11/09/2022] Open
Abstract
This study presents the design and synthetic pathway of unsymmetric ligands based on pyridine-pyrazolate scaffold with Donor-Acceptor (D-A) molecular arrays and their boron complexes to achieve a large Stokes shift. Intermolecular charge transfer (ICT) triggered by the uneven molecular charge distribution from electronically dense pyrazolate (donor) part of the ligands to electron-deficient boron centre (acceptor) resulted in a mega Stokes shift up to 263 nm for selected compounds while retaining the characteristic quantum efficiency and chemical stability. The photophysical properties of derivatization of pyrazolate group in the pyridine-pyrazolate scaffold of diaryl boron complexes were explored based on UV-Visible, steady-state and time-resolved fluorescence spectroscopy. An interesting dual emission along with quenching behaviour was also observed for 2-(6-methoxynaphthelene) 5-(2-pyridyl) pyrazolate boron complex (P5) due to the formation of a twisted intermolecular charge transfer (TICT) state from a locally excited (LE) state rendering it a potential candidate for sensing applications based on H-Bond quenching. In addition, the extended excited state lifetime of the reported compounds compared to classical boron-dipyrromethene (BODIPY) makes them suitable as potential probes for analytical applications requiring a longer excited state lifetime.
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4
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Asymmetric Core‐Expanded BOPYOs: Facile Synthesis and Optical Properties. Chemistry 2022; 28:e202201372. [DOI: 10.1002/chem.202201372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Indexed: 12/25/2022]
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Murali AC, Nayak P, Venkatasubbaiah K. Recent advances in the synthesis of luminescent tetra-coordinated boron compounds. Dalton Trans 2022; 51:5751-5771. [PMID: 35343524 DOI: 10.1039/d2dt00160h] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tetra-coordinated boron compounds offer a plethora of luminescent materials. Different chelation around the boron center (O,O-, N,C-, N,O-, and N,N-) has been explored to tune the electronic and photophysical properties of tetra-coordinated boron compounds. A number of fascinating molecules with interesting properties such as aggregation induced emission, mechanochromism and tunable emission by changing the solvent polarity were realised. Owing to their rich and unique properties, some of the molecules have shown applications in making optoelectronic devices, probes and so on. This perspective provides an overview of the recent developments of tetra-coordinated boron compounds and their potential applications.
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Affiliation(s)
- Anna Chandrasekar Murali
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar-752050, Odisha, India.
| | - Prakash Nayak
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar-752050, Odisha, India.
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar-752050, Odisha, India.
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6
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Benassi E. An inexpensive density functional theory-based protocol to predict accurate 19 F-NMR chemical shifts. J Comput Chem 2022; 43:170-183. [PMID: 34757623 DOI: 10.1002/jcc.26780] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 10/14/2021] [Accepted: 10/19/2021] [Indexed: 01/31/2023]
Abstract
Thanks to its advantages, 19 F-NMR is an increasingly popular technique for the structural characterization of F-containing molecules, among which polymers, materials, fluorophores, pharmaceuticals, and so forth. However, the computational calculation of the 19 F-NMR chemical shifts, both for prediction and interpretation of experimental spectra, remains a challenge. In this work a density functional theory (DFT) based protocol for the calculation of the chemical shifts is established within the framework of the gauge-independent atomic orbital method, upon verifying the performance of Hartree-Fock and 60 DFT functionals coupled with seven different basis sets. The benchmark is conducted using two sets of molecules, namely one used for testing methods and another used for probing; the former set consists of 134 molecules, the latter 50, yet both of them with F in different chemical environments. Following Bally-Rablen-Tantillo strategy, the scaling parameters and other statistical quantities were computed for each method upon least squares linear regression between experimental and computed chemical shifts. The designed computational workflow is computationally inexpensive and represents a significant improvement with respect to the current state of the art.
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Affiliation(s)
- Enrico Benassi
- Faculty of Chemistry, Novosibirsk State University, Novosibirsk, Russia
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7
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Liu Y, Li X, Hua Y, Zhang W, Zhou X, He J, Chen D. Tannic Acid as a Natural Ferroptosis Inhibitor: Mechanisms and Beneficial Role of 3’‐
O
‐Galloylation. ChemistrySelect 2021. [DOI: 10.1002/slct.202004392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yangping Liu
- The Fourth Clinical Medical College Guangzhou University of Chinese Medicine Waihuan East Road No. 232, Guangzhou Higher Education Mega Center Guangzhou China 510006
| | - Xican Li
- School of Chinese Herbal Medicine Guangzhou University of Chinese Medicine Waihuan East Road No. 232, Guangzhou Higher Education Mega Center Guangzhou China 510006
| | - Yujie Hua
- School of Chinese Herbal Medicine Guangzhou University of Chinese Medicine Waihuan East Road No. 232, Guangzhou Higher Education Mega Center Guangzhou China 510006
| | - Wenhui Zhang
- School of Chinese Herbal Medicine Guangzhou University of Chinese Medicine Waihuan East Road No. 232, Guangzhou Higher Education Mega Center Guangzhou China 510006
| | - Xianxi Zhou
- School of Basic Medical Science Guangzhou University of Chinese Medicine Guangzhou China 510006
| | - Jianfeng He
- School of Chinese Herbal Medicine Guangzhou University of Chinese Medicine Waihuan East Road No. 232, Guangzhou Higher Education Mega Center Guangzhou China 510006
| | - Dongfeng Chen
- School of Basic Medical Science Guangzhou University of Chinese Medicine Guangzhou China 510006
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Lugovik KI, Kanaa A, Benassi E, Belskaya NP. Fluorescent Assembles of 2‐Amino‐3‐cyanothiophenes with Azoles. Design and Peculiar Properties of Absorption and Emission. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kseniya I. Lugovik
- Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
| | - Ali Kanaa
- Ural Federal University 19 Mira Str. Yekaterinburg 620002 Russian Federation
| | - Enrico Benassi
- Shihezi University 280 N 4th Rd Shihezi Xinjiang 832000 P. R. China
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Castro KADF, Costa LD, Guieu S, Biazzotto JC, da Neves MGPMS, Faustino MAF, da Silva RS, Tomé AC. Photodynamic treatment of melanoma cells using aza-dipyrromethenes as photosensitizers. Photochem Photobiol Sci 2020; 19:885-891. [PMID: 32662457 DOI: 10.1039/d0pp00114g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In this study, we report for the first time the use of four aza-dipyrromethenes (ADPMs) as photosensitizers for cancer PDT. The synthesis and characterization of the ADPMs and their photodynamic action against B16F10 melanoma cells were assessed. ADPM 2 is the best singlet oxygen generator and the most phototoxic (at 2.5 μM) towards B16F10 cells.
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Affiliation(s)
- Kelly A D F Castro
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil.
| | - Letícia D Costa
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal
| | - Samuel Guieu
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal.,CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Portugal
| | - Juliana C Biazzotto
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil
| | | | | | - Roberto S da Silva
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil
| | - Augusto C Tomé
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Portugal
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10
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Eltyshev AK, Minin AS, Smoliuk LT, Benassi E, Belskaya NP. 2-Aryl-2,4-dihydro-5H-[1,2,3]triazolo[4,5-d]pyrimidin-5-ones as a New Platform for the Design and Synthesis of Biosensors and Chemosensors. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901582] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Artem S. Minin
- Ural Federal University; 19 Mira Str. 620002 Yekaterinburg Russia
- M. N. Mikheev Institute of Metal Physics; Ural Branch of Russian Academy of Science; 18 S. Kovalevskaya Str. 620108 Yekaterinburg Russia
| | - Leonid T. Smoliuk
- Institute of Immunology and Physiology; Ural Branch of Russian Academy of Science; 20 S. Kovalevskaya Str. 620049 Yekaterinburg Russia
| | - Enrico Benassi
- Lanzhou Institute of Chemical Physics; Chinese Academy of Science; 18 Tianshui Middle Rd 73000020 Lanzhou Shi Gansu Sheng P.R. China
- Department of Chemistry; Hexi University; 734000 Zhangye P. R. China
| | - Nataliya P. Belskaya
- Ural Federal University; 19 Mira Str. 620002 Yekaterinburg Russia
- I. Ya. Postovsky Institute of Organic Synthesis; Ural Branch of Russian Academy of Science; 20 S. Kovalevskaya Str. 620219 Yekaterinburg Russia
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11
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Palai BB, Soren R, Sharma NK. BODIPY analogues: synthesis and photophysical studies of difluoro boron complexes from 2-aminotropone scaffolds through N,O-chelation. Org Biomol Chem 2019; 17:6497-6505. [PMID: 31210246 DOI: 10.1039/c9ob00915a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Boron-dipyrromethene (BODIPY) fluorophore derivatives were prepared from a Pyrromethene scaffold and di-fluoroboron. To add to the range of biocompatible fluorophores, this report describes the synthesis and photophysical studies of carboxylate-functionalized BODIPY analogues from natural products, Tropolone and α-amino acids, through N,O-chelation. The structure of a few derivatives was confirmed by single crystal X-ray studies. UV/fluorescence studies revealed their fluorescence behaviors in organic solvents with a quantum yield of ∼0-15%, which varied based on the structure of amino acids. Further, electrochemical studies were accomplished by cyclic voltammetry, which confirm only one irreversible reduction reaction with Epc = -1.3 (V). Finally, their HOMO and LUMO molecular orbitals/energy differences were calculated from a theoretically (DFT) optimized structure, which also supported the role of amino group residues in the enhancement of the fluorescence. The glycinate derivative exhibited the greatest quantum yield compared to the other amino groups. Hence, 2-aminotropone containing BODIPY analogues are potential candidates for the development of various types of functionalized fluorophores as BODIPY analogues.
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Affiliation(s)
- Bibhuti Bhusana Palai
- School of Chemical Sciences, National Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni campus, Bhubaneswar-752050, Odisha, India. and HBNI-Mumbai, Mumbai, India
| | - Ramachandra Soren
- School of Chemical Sciences, National Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni campus, Bhubaneswar-752050, Odisha, India. and HBNI-Mumbai, Mumbai, India
| | - Nagendra K Sharma
- School of Chemical Sciences, National Institute of Science Education and Research (NISER)-Bhubaneswar, Jatni campus, Bhubaneswar-752050, Odisha, India. and HBNI-Mumbai, Mumbai, India
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12
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A highly fluorescent tri-nuclear boron complex with large Stokes shifts based on tripodal Schiff base: synthesis and photophysical properties. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1643-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Huang J, Wang Y, Van Hecke K, Pereshivko OP, Peshkov VA. Studies on Functionalization of N,O-Chelated Isoquinoline-Enol Boron Complexes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jianjun Huang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Yingchun Wang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Kristof Van Hecke
- XStruct; Department of Chemistry; Krijgslaan 281-S3, B -9000 Ghent Belgium
| | - Olga P. Pereshivko
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
| | - Vsevolod A. Peshkov
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Dushu Lake Campus 215123 Suzhou China
- Department of Chemistry; School of Science and Technology; Nazarbayev University; 53 Kabanbay Batyr Ave, Block 7 010000 Astana Republic of Kazakhstan
- The Environment and Resource Efficiency Cluster (EREC); Nazarbayev University; Astana Republic of Kazakhstan
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