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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sulphonamide chalcones: Conformationally diverse yet optically similar

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Custodio, Jean M. F. [1] ; Gotardo, Fernando [2] ; Vaz, Wesley F. [3] ; D'Oliveira, Giulio D. C. [1] ; Cocca, Leandro H. Z. [2] ; Fonseca, Ruben D. [2, 4] ; Perez, Caridad Noda [1] ; de Boni, Leonardo [2] ; Napolitano, Hamilton B. [3]
Total Authors: 9
[1] Univ Fed Goias, Inst Quim, Goiania, Go - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, Sao Paulo, SP - Brazil
[3] Univ Estadual Goias, Ciencias Exatas & Tecnol, Anapolis, Go - Brazil
[4] Univ Popular Cesar, Campus Univ, Barrio Sabana, Valledupar - Colombia
Total Affiliations: 4
Document type: Journal article
Source: Journal of Molecular Structure; v. 1198, DEC 15 2019.
Web of Science Citations: 0

In this paper, we present the synthesis of three chalcone analogues and their spectroscopic, structural and optical characterization. The influence of the different substituents on the crystalline structure and on their optical properties was evaluated. The effects of derivatization on the chalcones, both at the molecular and supramolecular levels, were evaluated. Also, the molar absorptivity, the first hyperpolarizability beta and the two-photon absorption cross-section sigma(2PA) were obtained. The extended structures in each compound are stabilized by hydrogen-bonded dimers and by a pseudo-ring formed from an intramolecular H-bond. It was observed that more voluminous substituents, such as chlorine, contribute to the deviation from planarity. Although many effects were observed in molecular structures of these analogues when in solid form, experimental results of linear and nonlinear optical (NLO) properties showed that the optical properties were not as much influenced in solution. In addition, and to support some experimental results, the theoretical first hyperpolarizability was calculated and showed good agreement with experimental results, which are approximately 10 x 10(-30) cm(5)/esu. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/20886-1 - Ultrafast nonlinear optical spectroscopy: Transient Absorption and optical Kerr Gate with polarization control
Grantee:Leonardo De Boni
Support type: Regular Research Grants
FAPESP's process: 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials
Grantee:Cleber Renato Mendonça
Support type: Research Projects - Thematic Grants