Photoluminescent ellipsometric circular dichroism

Gustavo Gonçalves Dalkiranis; Fernando Costa Basílio; Roberto S Nobuyasu; Silésia de Fátima Curcino da Silva; Sandra Lucia Dias Nogueira; Eralci Moreira Therézio; Françoise Serein-Spirau; Raigna A Silva; Alexandre Marletta

doi:10.1016/j.saa.2023.122437

Photoluminescent ellipsometric circular dichroism

Spectrochim Acta A Mol Biomol Spectrosc. 2023 May 15:293:122437. doi: 10.1016/j.saa.2023.122437. Epub 2023 Feb 3.

Authors

Gustavo Gonçalves Dalkiranis¹, Fernando Costa Basílio², Roberto S Nobuyasu³, Silésia de Fátima Curcino da Silva², Sandra Lucia Dias Nogueira⁴, Eralci Moreira Therézio⁵, Françoise Serein-Spirau⁶, Raigna A Silva², Alexandre Marletta²

Affiliations

¹ Physics Institute of São Carlos, University of São Paulo, 13560-970 São Carlos, SP, Brazil; Catalan Institute of Nanoscience and Nanotechnology (ICN2), Edifici ICN2, Campus UAB, 08193, Bellaterra, Barcelona, Spain. Electronic address: dalkiranis@gmail.com.
² Physics Institute, Federal University of Uberlândia, 38400-902 Uberlândia, MG, Brazil.
³ Physics and Chemistry Institute, Federal University of Itajubá, CEP 37500-903 Itajubá, MG, Brazil.
⁴ University Center of Patos de Minas - UNIPAM, 31708-054 Patos de Minas, MG, Brazil.
⁵ Institute of Physics, Federal University of Mato Grosso, 78060-900 Cuiabá, MT, Brazil. Electronic address: therezio@fisica.ufmt.br.
⁶ Institut Charles Gerhardt, Ecole Nationale Superieure de Chimie de Montpellier, 34296 Montpellier, France.

PMID: 36758363
DOI: 10.1016/j.saa.2023.122437

Abstract

A novel spectroscopic technique, photoluminescent ellipsometric circular dichroism (PECD), which distinguishes all radiative electronic transitions related to molecular chiral centers. Additionally, it is proposed as complementary to the ellipsometric Raman spectroscopy (ERS) technique, thus establishing a relationship between vibrational modes and electronic transitions, associated with molecular chiral centers. In this way, PECD turns into a powerful technique for chiral material characterization. The PECD technique was performed on a chiral oligomer (1R,2R)-diiminocyclohexane, and its derivative polymer. A complete photophysical characterization in solution was performed to corroborate the new PECD technique.

Keywords: (1R; 2R)-diiminocyclohexane; Ellipsometric Spectroscopy; Optical Activity; Photoluminescent ellipsometric circular dichroism.