Fluorescence Dynamics of Individual Charge-Transfer Complexes and Charge-Transfer Nanocrystals Revealed by Single Molecule Fluorescence Spectroscopy

用单分子荧光光谱(SMRS)研究了以1，2，4，5-四氰基苯为受体的单咔唑和二咔唑化合物在不同聚合物膜中形成的单一电荷转移(CT)络合物的荧光动力学。同时测量的结果(CT时间轨迹、荧光强度和寿命)显示出三种时间轨迹模式。这些图案的出现比例取决于供体和聚合物。根据给体的化学结构和主体聚合物的自由体积对这些结果进行了讨论。SMFS还被应用于激基复合物系统和CT纳米晶。并对这些结果进行了讨论。

Single molecule fluorescence spectroscopy(SMRS) was applied for elucidating fluorescence dynamics of singly isolated charge-transfer(CT) complexes formed between various monocarbazolyl and dicarbazolyl compounds as donors and 1, 2, 4, 5-tetracyanobenzene as an acceptor in various polymer films. The results of simultaneous measurements(time traces of CT fluorescence intensity and lifetime) showed three patterns of time traces. The ratio of the appearance of these patterns depended on donors and polymers. These results were discussed on the basis of the chemical structure of donors and the free volume of the host polymers. SMFS was also applied to an exciplex system and CT nanocrystals. These results were also discussed.