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• W2546777897 abstract "Nonlinear optical (NLO) properties of organic and metal-organic materials are of considerable interest to emerging optoelectronic and photonic technologies. Much work has been carried out on the former materials but the latter ones have received less attention till date. Herein, a density functional theory (DFT) study on the combined effects of transition metal chelation and solvent polarity on the first hyperpolarizability (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mrow><mml:msub><mml:mrow><mml:mi>β</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>t</mml:mi><mml:mi mathvariant=normal>o</mml:mi><mml:mi mathvariant=normal>t</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>) of 4-methoxyacetophenone thiosemicarbazone (MAPTSC) is reported. MAPTSC exhibits a tautomeric form with higher optical nonlinearity rendering its NLO response in polar solvents potentially switchable. Our results have revealed significant modifications of the first hyperpolarizability of MAPTSC upon complexation with different transition metal chlorides in the presence of solvents with varying dielectric constants. Therefore, its second-order NLO response is highly tunable by the synergy of transition metal chelation and solvent polarity. MAPTSC and its Zn(II) and Pt(II) chloride complexes are promising NLO materials because their gas-phase <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:mrow><mml:msub><mml:mrow><mml:mi>β</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant=normal>t</mml:mi><mml:mi mathvariant=normal>o</mml:mi><mml:mi mathvariant=normal>t</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math> values are larger than those of the prototype push-pull molecules, para -nitroaniline (PNA) and urea, by factors of about 1.40–1.76 and 19.57–37.24, respectively; these factors greatly increase in polar solvent medium. Moreover, they possess high optical transparencies in the visible region of the electromagnetic spectrum which mitigate transparency/nonlinearity trade-offs, thereby increasing the likelihood of broad band NLO response." @default.
• W2546777897 created "2016-11-11" @default.
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• W2546777897 date "2016-11-02" @default.
• W2546777897 modified "2023-10-14" @default.
• W2546777897 title "Concomitant Effects of Transition Metal Chelation and Solvent Polarity on the First Molecular Hyperpolarizability of 4-Methoxyacetophenone Thiosemicarbazone: A DFT Study" @default.
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• W2546777897 doi "https://doi.org/10.1155/2016/7909576" @default.
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