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5,6,12,13‐Tetraazaperopyrenes as Unique Photonic and Mechanochromic Fluorophores
Author(s) -
Yuan Wei,
Cheng Junjie,
Li Xiaopei,
Wu Mengjiao,
Han Yi,
Yan Chunmei,
Zou Gang,
Müllen Klaus,
Chen Yulan
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201914900
Subject(s) - planar , intermolecular force , crystallography , fluorescence , materials science , chemistry , molecule , optics , organic chemistry , physics , computer graphics (images) , computer science
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.