Large cyano- and triazine-substituted D–π–A–π–D structures as efficient AIEE solid emitters with large two-photon absorption cross sections
作者:Wei Huang、Fansheng Tang、Bo Li、Jianhua Su、He Tian
DOI:10.1039/c3tc31913j
日期:——
transfer (ICT) characteristics and AIEE features, 3a–c are intense solid emitters (589 nm, 546 nm and 556 nm, respectively) with high quantum efficiencies of 18.1%, 27.4% and 14.9%, respectively. Their two-photon absorption (2PA) properties have been investigated using the open-aperture Z-scan technique, and the values of the 2PA cross section at 800 nm for 3a–c are 1363 GM, 413 GM and 5782 GM, respectively
已经合成并表征了一系列新的大的π共轭分子,包括二苯胺和咔唑(3a–c)。所有化合物均显示出聚集诱导的发射增强(AIEE)特性:在纯THF中显示弱荧光,而在水分数(f w)为90%且荧光强度急剧增加的混合物中观察到显着的AIEE效果。结合分子内电荷转移(ICT)特性和AIEE特性,3a–c是强固体发射体(分别为589 nm,546 nm和556 nm),具有分别为18.1%,27.4%和14.9%的高量子效率。使用开孔Z对它们的双光子吸收(2PA)特性进行了研究扫描技术,对于3a–c,在800 nm处2PA截面的值分别为1363 GM,413 GM和5782 GM。它们出色的2PA特性和固体量子效率为它们在生物光子和光电应用中的潜在应用铺平了道路。