期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 25, 页码 9940-9945出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201914900
关键词
Bischler-Napieralski cyclization; mechanochromic fluorescence; microcrystals; optical waveguides; peropyrene
资金
- National Key Research and Development Program of China [2017YFA0204503, 2017YFA0207800]
- National Natural Science Foundation of China [21734006, 21774115, 21975178, 21522405]
- Thousand Youth Talents Plan
- Natural Science Foundation of Tianjin [17JCJQJC44200]
5,6,12,13-Tetraazaperopyrenes with different number of tert-butyl groups (c-TAPP-T, c-TAPP-H) were synthesized, via four-fold Bischler-Napieralski cyclization as the key step. As deduced from the single-crystal structures and optical properties, N-doping and substitution type allow for a precise control of intermolecular interactions. Compared to the reported 1,3,8,10-tetraazaperopyrenes, significantly different packing modes were found in 5,6,12,13-tetraazaperopyrenes. Going from c-TAPP-T to c-TAPP-H, two additional tert-butyl groups lead to different preferential growth directions, affording 1D and 2D microcrystals, respectively. Most importantly, both microcrystals exhibit excellent optical waveguide properties with extraordinarily low loss coefficients and unique polarization features. Although c-TAPP-H possesses a rigid and planar core, its crystals display an exceptional mechanochromic fluorescence, which, again, depends on the mode of molecular packing.
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