Giant Static Dipole Moment In Pseudoisocyanine J-aggregate
Giant Static Dipole Moment In Pseudoisocyanine J-aggregate
复制标题
准异花青 J 聚集体中的巨大静态偶极矩
DOI：
10.1080/10587259808042451
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Misawa
中科院分区：
文献类型：
--
作者：
T. Kobayashi;K. Misawa
摘要 基于通过新型垂直旋涂方法制备的取向J-聚集体的线性和非线性光学性质，提出了J-聚集体、介观聚集体和宏观聚集体的分级结构的新模型。研究了二向色光谱的浓度依赖性、烧孔效率的波长依赖性以及电吸收的偏振依赖性。介观聚集体的特征是相干激子在介观尺寸上离域，而大聚集体可以通过溶剂流的宏观离心力进行定向。大团聚体是由交替堆叠的细团聚体的不相干整体构成的。
Abstract A new model of hierarchical structure in J-aggregates, mesoaggregates and macroaggregates, is proposed on the basis of the linear and nonlinear optical properties of the oriented J-aggregates prepared by a novel vertical spin-coating method. The concentration dependence of dichroic spectra, wavelength dependence of hole-burning efficiency, and polarization dependence of electroabsorption are studied. The mesoaggregate is characterized by coherent exciton delocalized over the mesoscopic size, while the macroaggregate can be oriented by macroscopic centrifugal force of solvent flow. The macroaggrcgale is constituted by an incoherent ensemble of the mesoaggregates alternately stacked.