State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
Faraday Discuss. 2017 Feb 1;196:163-176. doi: 10.1039/c6fd00159a. Epub 2016 Dec 1.
A donor-acceptor molecule, PICNDSB, with cyclopenta[b]indole as the donor and (1,4-phenylene)bis(3-phenylacrylonitrile) as the acceptor, is designed and synthesized. PICNDSB shows typical aggregation-induced emission characteristics. The photoluminescence quantum yield of PICNDSB in dilute THF was only 0.7% and reaches 51.4% in the solid state. Compared with its analogue CzCNDSB, PICNDSB possesses stronger intramolecular charge transfer properties, as revealed from CV measurements, theoretical calculations, and their fluorescence behaviors. Correspondingly, the relatively more efficient electron-donating terminal group of cyclopenta[b]indole endows the molecule with a much higher two-photon absorption cross section of 1286 GM compared to CzCNDSB (357 GM).
设计并合成了一种给体-受体分子 PICNDSB，其给体为环戊并[b]吲哚，受体为（1,4-亚苯基）双（3-苯基丙烯腈）。PICNDSB 表现出典型的聚集诱导发光特性。在稀 THF 中，PICNDSB 的光致荧光量子产率仅为 0.7%，而在固态中则达到 51.4%。与类似物 CzCNDSB 相比，PICNDSB 具有更强的分子内电荷转移特性，这可以从 CV 测量、理论计算和它们的荧光行为中得到证明。相应地，环戊并[b]吲哚的给电子端基赋予了分子更高的双光子吸收截面，为 1286 GM，而 CzCNDSB 仅为 357 GM。
