Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 188, Issue -, Pages 443-455Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2017.07.034
Keywords
1,3-Dimethy1-5-(phenylazo)-6-aminouracil; NLO and NBO analysis; Infrared spectroscopy; H-1 NMR and UV-Vis analysis
Categories
Funding
- Kocaeli University Research Fund [HDP 2014/147]
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The equilibrium geometry, nuclear magnetic resonance (NMR) and UV-Vis analysis, and vibrational frequencies for the azo and hydrazone isomers of 1,3-dimethyl-5-(phenylazo)-6-aminouracil have been performed using density functional theory (DFT/B3LYP) method with 6-311G(d,p) basis set. A detailed interpretation of the vibrational spectra has been made on the basis of the calculated potential energy distribution (PED) obtained from the Vibrational Energy Distribution Analysis (VEDA4) program. The H-1 NMR chemical shifts with respect to TMS were calculated by the gauge independent atomic orbital (GIAO) method and compared with the experimental data. Stability of the molecule arising from hyper conjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis. Using the TD-DFT method, electronic absorption spectra in CHCl3 solvent of the title compound have been predicted, and good agreement is determined with the experimental one. The NLO properties such as mean polarizability (), the anisotropy of the polarizability () and the mean first-order hyperpolarizability () were computed by using finite field method. The computed values of mu, alpha and beta for the azo and hydrazone forms of the title molecule are 5.4717 and 3.8905 D, 2.7773 x 10(-23) and 2.7598 x10(-23) esu, and 3.4499 x 10(-3) and 6.8504 x 10(-3) esu, respectively. The high beta values and non-zero values of mu indicate that the title compound might be a good candidate for NLO material. (C) 2017 Elsevier B.V. All rights reserved.
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