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首页> 外文期刊>Chemical Physics: A Journal Devoted to Experimental and Theoretical Research Involving Problems of Both a Chemical and Physical Nature >Solvent effects on photophysical properties of merocyanine 540
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Solvent effects on photophysical properties of merocyanine 540

机译：溶剂对花菁540光物理性质的影响

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摘要

Absorption and corrected fluorescence emission spectra of merocyanine 540 (MC 540) were recorded in solvents with different physico-chemical parameters - dielectric constant ε_r, refractive index n, dipolarity/polarizability π~*, hydrogen-bonding ability α. Hypsochromic shifts of their maxima positions did not obey Lippert-Mataga equation. However, a correlation with π~* and α was observed. Relative quantum yields φ_f and rate constants of nonradiative deactivation processes κ_(nr) of the dye in different solvents based on steady-state measurements were estimated. Dependence on hydrogen-bonding ability was indicated - with increasing α, φ_f decreased and κ_(nr) increased. The interaction between MC 540 and solvent molecules is discussed in terms of the different interactions contributing to the solvent stabilization of merocyanine dyes. Our results indicate that hydrogen bonding may contribute to solvent stabilization of MC 540.
机译：在具有不同物理化学参数-介电常数ε_r，折射率n，偶极/极化率π〜*，氢键结合力α的溶剂中，记录了花菁540（MC 540）的吸收光谱和校正的荧光发射光谱。它们的最大位置的变色位移不服从Lippert-Mataga方程。然而，观察到与π〜*和α的相关性。基于稳态测量，估算了染料在不同溶剂中的相对量子产率φ_f和非辐射失活过程的速率常数κ_（nr）。指出了对氢键结合能力的依赖-随着α的增加，φ_f减小，而κ_（nr）增大。讨论了MC 540和溶剂分子之间的相互作用，这些相互作用会影响部花青染料的溶剂稳定性。我们的结果表明氢键可能有助于MC 540的溶剂稳定化。

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