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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Lithium ion-ketocyanine dye interactions in the ground and excited states
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Lithium ion-ketocyanine dye interactions in the ground and excited states

机译：锂离子-酮氰酸染料在基态和激发态的相互作用

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摘要

Electronic absorption and emission spectral characteristics of a ketocyanine dye have been studied in solution in the presence of lithium perchlorate. Absorption spectral studies indicate complex formation between lithium ion and the dye in the ground state. The value of the equilibrium constant along with the molar absorbance of the absorbing species has been determined for the dye-cation interaction. The energy of maximum fluorescence shifts toward the red with the addition of LiClO4. Steady-state emission studies point to the existence of two emitting species, viz., the solvated and the complexed dye in equilibrium. The values of the equilibrium constant for the process have been determined in acetone and acetonitrile. Time-resolved studies in the picosecond domain in pure solvents reveal that the lifetime (tau) value increases as the solvation interaction increases. Time-resolved studies also indicate the presence of two emitting species in equilibrium.
机译：在高氯酸锂存在下，在溶液中研究了酮菁染料的电子吸收和发射光谱特征。吸收光谱研究表明，在基态下锂离子和染料之间形成了络合物。对于染料-阳离子相互作用，已经确定了平衡常数的值以及吸收物质的摩尔吸光度。加入LiClO4可使最大荧光能量移向红色。稳态发射研究指出存在着两种发射态，即处于平衡状态的溶剂化染料和络合染料。该方法的平衡常数的值已经在丙酮和乙腈中确定。在皮秒域中的纯溶剂中，时间分辨研究表明，随着溶剂化相互作用的增加，寿命（tau）值也随之增加。时间分辨的研究还表明两种发光物质处于平衡状态。

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