Dependence of Raman scattering by aggregated 2,2-cyanine on pH and excitation wavelength
Dependence of Raman scattering by aggregated 2,2-cyanine on pH and excitation wavelength
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聚集的 2,2-花青拉曼散射对 pH 值和激发波长的依赖性
DOI：
10.1021/j100353a014
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
J. Macklin
中科院分区：
文献类型：
--
作者：
D. Akins;J. Macklin
本文根据溶液pH值和激发频率对2，2 '-菁聚集态的基本和高阶线性拉曼散射的依赖关系进行了分析。2，2 '-花青的两种构象被假定为随机混合形成吸附的J-聚集体结构。我们进一步假设，拉曼光谱由吸附的J-聚集体以及有效的单体（例如，弱聚集或聚集终止）2，2 ′-花青分子。散射增强是聚集增强和共振拉曼增强的结果
Fundamental and higher order linear Raman scattering of aggregated 2,2'-cyanine has been analyzed on the basis of dependence on pH and excitation frequency. Two conformers of 2,2'-cyanine are postulated as being randomly mixed to form the adsorbed J-aggregate structure. We further postulate that the Raman spectrum consists of bands due to adsorbed J-aggregate as well as effectively monomeric (e.g., weakly aggregated or aggregate terminating) 2,2'-cyanine molecules. The scattering is enhanced as a result of both aggregation enhancement and resonance Raman enhancement