First Hyperpolarizability of 1,3-Thiazolium-5-thiolates Mesoionic Compounds
Journal of physical chemistry(2018)
摘要
The first hyperpolarizabilities of the mesoionic compounds (MICs) 2-(4-chlorophenyl)-3-methyl-4-phenyl-1,3-thiazolium-5-thiolate (MIC-1), 2-(4-chlorophenyl)-3-methyl-4-(4-methylphenyl)-1,3-thiazolium-5-thiolate (MIC-2), and (2-(4-chlorophenyl)-3-methyl-4-(4-methoxyphenyl)-1,3-thiazolium-5-thiolate) (MIC-3), dissolved in dimethyl sulfoxide (DMSO), are reported here for the first time to our knowledge. Hyper-Rayleigh scattering experiments were performed with an excitation source operating at λ = 1180 nm (ω = 8475 cm–1). The measured hyperpolarizability, β(2ω), was used to calculate the static hyperpolarizability, β(0), by applying the classical two-level model. The values obtained for β(0) were 10.1 × 10–30 esu (MIC-1), 8.7 × 10–30 esu (MIC-2), and 10.4 × 10–30 esu (MIC-3) which are smaller than previous theoretical predictions that did not consider features related to the liquid phase.
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Organic Optoelectronic Materials
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