期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 6, 页码 1141-1148出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc31913j
关键词
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资金
- NSFC/China
- National Basic Research 973 Program
A series of new large pi-conjugated molecules including diphenylamine and carbazole have been synthesized and characterized (3a-c). All compounds display aggregation-induced emission enhancement (AIEE) characteristics: exhibiting weak fluorescence in pure THF, while a significant AIEE effect is observed in mixtures with a water fraction (f(w)) of 90% with a sharp increase in fluorescence intensity. Combining intramolecular charge 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. Their excellent 2PA properties and solid quantum efficiencies pave the way for their potential use in biophotonic and optoelectronic applications.
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