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Lopes JMS, Batista AA, Araujo PT, Neto NMB. Supramolecular porphyrin as an improved photocatalyst for chloroform decomposition. RSC Adv 2023; 13:5473-5482. [PMID: 36793300 PMCID: PMC9924222 DOI: 10.1039/d2ra07720e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 02/02/2023] [Indexed: 02/17/2023] Open
Abstract
In this work, the outlying decoration of the free-base meso-(4-tetra) pyridyl porphyrin (H2TPyP) with the RuCl(dppb)(5,5'-Me-bipy) ruthenium complex (here named Supra-H2TPyP) is observed as an improved molecular photocatalyst for dye-mediated chloroform (CHCl3) decomposition via one-photon absorption operating in the visible spectral range (532 nm and 645 nm). Supra-H2TPyP offers a better option for CHCl3 photodecomposition when compared to the same process mediated by pristine H2TPyP, which requires either excited-state- or UV absorption. The chloroform photodecomposition rates for Supra-H2TPyP as well as its excitation mechanisms are explored as a function of distinct laser irradiation conditions.
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Affiliation(s)
- J. M. S. Lopes
- Department of Physics, Federal University of RoraimaBoa VistaRRBrazil,Institute of Natural Sciences, Graduate Program in Physics, Federal University of ParáBelémPABrazil
| | - A. A. Batista
- Department of Chemistry, Federal University of São CarlosSão CarlosSPBrazil
| | - P. T. Araujo
- Department of Physics and Astronomy, University of AlabamaTuscaloosaAlabamaUSA
| | - N. M. Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of ParáBelémPABrazil
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Lopes J, Machado A, Batista A, Iglesias B, Araujo P, Barbosa Neto N. Fluorinated phenyl meso-substituents regulating excited state absorption-driven protonation of free-base porphyrins. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Lopes J, Machado A, Batista A, Araujo P, Barbosa Neto N. Protonation, exciplex, and evidence of aggregate formation in meso-tetra(4-pyridyl) porphyrin triggered by excited-state absorption. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ye L, Fang Y, Ou Z, Wang L, Xue S, Sun J, Kadish KM. Electrochemistry of zinc tetraarylporphyrins containing fused butano and benzo groups. Effect of solvent and substituents on spectra, potentials and mechanism in nonaqueous media. J PORPHYR PHTHALOCYA 2018. [DOI: 10.1142/s1088424618501067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Two series of zinc tetraarylporphyrins containing four [Formula: see text],[Formula: see text]′-pyrrole fused butano or benzo groups were synthesized and characterized as to their electrochemical and spectroelectrochemical properties in nonaqueous media. The examined compounds are represented as butano(Ar)4PorZn and benzo(Ar)4PorZn, where Por is the porphyrin dianion and Ar is a [Formula: see text]-CH3Ph, Ph or [Formula: see text]-ClPh substitutent on [Formula: see text]-positions of the macrocycle. Each Zn(II) butano- and benzoporphyrin undergoes two one-electron reductions to give a [Formula: see text]-anion radical and dianion in CH2Cl2. In contrast, three reductions were observed for the benzoporphyrin derivatives in pyridine, the third of which is assigned as electron addition to a benzophlorin anion generated from the doubly reduced benzoporphyrin. Two overlapped one-electron oxidations were observed for the butanoporphyrins in CH2Cl2, a result not previously observed for any other zinc porphyrin. The electrochemically measured HOMO-LUMO gap of the benzoporphyrins ranges from 1.89 to 1.90 V in CH2Cl2 and from 1.93 to 1.95 V in pyridine. Both values are smaller than the gaps of butanoporphyrins at 2.11-2.13 V in CH2Cl2 and 2.07.2.09 V in pyridine.
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Affiliation(s)
- Lina Ye
- College of Computer, Jilin Normal University, Siping 136000, P. R. China
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yuanyuan Fang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Zhongping Ou
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
| | - Liping Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
| | - Songlin Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Jing Sun
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, USA
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