Photophysics and visible light photodissociation of supramolecular meso-tetra(4-pyridyl) porphyrin/RuCl2 (CO)(PPh3)(2) structures

Autor(es)

Lopes, J. M. S. ^[1] ; Costa, S. N. ^[1] ; Batista, A. A. ^[2] ; Dinelli, L. R. ^[3] ; Araujo, P. T. ^{[4, 1]} ; Barbosa Neto, N. M. ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Para, Inst Nat Sci, Grad Program Phys, Belem, Para - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, Sao Carlos, SP - Brazil

^[3] Univ Fed Uberlandia, Coll Sci Pontal, Ituiutaba, MG - Brazil

^[4] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 - USA

• Tipo de documento: Artigo Científico
• Fonte: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY; v. 237, AUG 15 2020.
• Citações Web of Science: 0

Resumo

In the last decades, supramolecular structures have been explored in many technological efforts. One example of such supramolecules is attained when ruthenium complexes are attached in the outer sites of a porphyrin. Ruthenium complexes act as modulators of the photophysical processes of macrocyclic molecules. Besides the investigation of the main changes introduced by the ruthenium complexes in the electronic and vibronic properties, and in the excited state deactivation processes of porphyrins, discussions concerning the photostability of these supramolecules are much needed. Here, we investigate the supramolecular free-base meso-tetra(4-pyridyl) porphyrin decorated with ``RuCl2(CO)(PPh3)(2){''} ruthenium species linked at each of its (4-pyridyl) moieties. The modifications in the photophysical processes introduced by the metallic outlying species are discussed and our results suggest an energy transfer process from the porphyrin B-band to the ruthenium complex MLCT-band. The demonstration of visible light photodissociation of the supramolecule, via both pulsed and continuous laser, is also addressed. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/50869-6 - INCT 2014: em Eletrônica Orgânica INEO
• Beneficiário: Roberto Mendonça Faria
• Modalidade de apoio: Auxílio à Pesquisa - Temático