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Influence of the meso-substituents on the spectral features of free-base porphyrin.

التفاصيل البيبلوغرافية
العنوان: Influence of the meso-substituents on the spectral features of free-base porphyrin.
المؤلفون: Lopes JMS; Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil. Electronic address: jefferson.lopes@icen.ufpa.br., Reis JRT; Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil., Machado AEH; Institute of Chemistry, Federal University of Uberlândia, Uberlândia, MG, Brazil; Federal University of Catalão, Av. Lamartine Pinto de Avelar, 1120, CEP 75704-020, Catalão, GO, Brazil., Leite THO; Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil., Batista AA; Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil., Acunha TV; Bioinorganic and Porphyrinoid Materials Laboratory, Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil., Iglesias BA; Bioinorganic and Porphyrinoid Materials Laboratory, Department of Chemistry, Federal University of Santa Maria, Santa Maria, RS, Brazil., Araujo PT; Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States. Electronic address: paulo.t.araujo@ua.edu., Barbosa Neto NM; Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil. Electronic address: barbosaneto@ufpa.br.
المصدر: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2020 Sep 05; Vol. 238, pp. 118389. Date of Electronic Publication: 2020 Apr 30.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Country of Publication: England NLM ID: 9602533 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3557 (Electronic) Linking ISSN: 13861425 NLM ISO Abbreviation: Spectrochim Acta A Mol Biomol Spectrosc Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Publication: : Amsterdam : Elsevier
Original Publication: [Kidlington, Oxford, U.K. ; Tarrytown, NY] : Pergamon, c1994-
مستخلص: The role of meso-substituents on the spectral features of free-base porphyrins is explored. Meso-tetra(4-pyridyl)porphyrin is compared with meso-tetra(2-thienyl)porphyrin and meso-tetra(pentafluorophenyl)porphyrin. Our results indicate that some of the asymmetric Q-bands in the free-base porphyrin tend to become symmetric relative to the adopted meso-substituent. The results show that the outlying perturbations lead the free-base quasi-degenerated Q x 1 , Q x 2 , Q y 1 , and Q y 2 bands to be closer in energy. Combined, absorption, fluorescence and Raman spectroscopies endorse our conclusions showing that both the frequencies and the Huang-Rhys factors associated with every vibronic progression are noticeably affected by the investigated meso-substituents. Our results confirm that the B-band is also multi-featured in agreement with what is found for the Q-bands.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
فهرسة مساهمة: Keywords: Asymmetric Q-band; Electronic and vibronic structure; Porphyrin; meso-substituents
تواريخ الأحداث: Date Created: 20200518 Date Completed: 20200608 Latest Revision: 20200608
رمز التحديث: 20240628
DOI: 10.1016/j.saa.2020.118389
PMID: 32417643
قاعدة البيانات: MEDLINE
الوصف
تدمد:1873-3557
DOI:10.1016/j.saa.2020.118389