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Synthesis and structural analysis of novel indole derivatives by XRD, spectroscopic and DFT studies

Texto completo
Autor(es):
Tariq, Sobia [1] ; Raza, Abdul Rauf [1] ; Khalid, Muhammad [2] ; Rubab, Syeda Laila [3] ; Khan, Muhammad Usman [4] ; Ali, Akbar [1] ; Tahir, Muhammad Nawaz [5] ; Braga, Ataualpa Albert Carmo [6]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Sargodha, Dept Chem, Ibn E Sina Block, Sargodha 40100 - Pakistan
[2] Khwaja Fareed Univ Engn & Informat Technol, Dept Chem, Rahim Yar Khan 64200 - Pakistan
[3] Univ Educ, Div Sci & Technol, Dept Chem, Lahore - Pakistan
[4] Govt Coll Univ, Dept Appl Chem, Faisalabad 38000 - Pakistan
[5] Univ Sargodha, Dept Phys, Ibn ul Hathim Block, Sargodha 40100 - Pakistan
[6] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Journal of Molecular Structure; v. 1203, MAR 5 2020.
Citações Web of Science: 9
Resumo

The indole derivatives have been getting immense interest to possess diverse applications in different fields. In present investigation, four novel indole based derivatives namely; 4,6-dimethoxy-2,3-diphenyl-1H-indole 3a, 4,5,6-trimethoxy-2,3-diphenyl-1H-indole-7-carbaldehyde 4b, N-(3'''-chlorophenyl) (4,6-dimethoxy-2,3-diphenyl-1H-indol-7-yl)methanimine 6a and N-(3'''-chlorophenyl) (4,5,6-trimethoxy-2,3-diphenyl-1H-indol-7-yl)methanimine 6b were synthesized and characterized by H-1 NMR \& C-13 NMR to resolve their molecules structures. To provide additional spectroscopic support, FT-IR and UV-Visible techniques were executed for characterization of entitle synthesized molecules. The X-ray diffraction (XRD) studies have been performed to evaluate bond angles, bond lengths, unit cells and specific space groups. Ancillary, density functional theory (DFT) study at B3LYP level of theory and 6-311 + G(d,p) basis set to investigate the optimized geometry, FT-IR vibrational analysis, frontier molecular orbital (FMO), molecular electrostatic potential (MEP) and nonlinear optical (NLO investigations. The results of single crystal studies and experimental spectroscopic studies were compared with computational insights and found in good agreement. Global reactivity parameters were estimated using energy values of FMOs. The UV-Vis spectral analysis was executed by time dependent DFT (TDDFT) at B3LYP/6-311 + G(d,p) level of theory. Two-state model and urea molecule comparative analysis evident that 3a, 4b, 6a and 6b comprise of fine NLO properties. We hope that this synergistic experimental-computational study may provide new ways for the utilization of investigated molecules for NLO associated hi-tech applications. (C) 2019 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 15/01491-3 - Estudo teórico das reações de acoplamento-cruzado: catálise homogênea e heterogênea
Beneficiário:Ataualpa Albert Carmo Braga
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 14/25770-6 - Novas fronteiras em reações de acoplamento cruzado mediadas por paládio: associando catálise enantiosseletiva, ativações C-H, novos materiais e reações em fluxo visando alta eficiência e sustentabilidade em processos sintéticos
Beneficiário:Carlos Roque Duarte Correia
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 11/07895-8 - Estudo teórico das reações de Heck-Matsuda
Beneficiário:Ataualpa Albert Carmo Braga
Linha de fomento: Bolsas no Brasil - Pós-Doutorado