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Dipyrido[3,2‐ a :2′,3′‐ c ]phenazine‐Based Donor–Acceptor Aromatic Heterocyclic Compounds with Thienyl and Triphenylamino Chromophores at the 2,7‐ and/or 10,13‐Positions
Author(s) -
Wang XiaoXu,
Tao Tao,
Geng Jiao,
Ma BinBin,
Peng YuXin,
Huang Wei
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201301284
Subject(s) - phenazine , chromophore , intramolecular force , acceptor , thermal stability , molecule , chemistry , fluorescence , crystallography , photochemistry , stereochemistry , organic chemistry , physics , quantum mechanics , condensed matter physics
A series of T‐ and H‐shaped donor–acceptor (D–A) types of dipyrido[3,2‐ a :2′,3′‐ c ]phenazine (DPPZ)‐based molecules, extended by thienyl and triphenylamino chromophores at the 2,7‐(bottom) and/or 10,13‐positions (top), have been designed and prepared successfully. Synthetic, structural, thermal, spectral, and computational comparisons have been carried out for related compounds because of their adjustable intramolecular charge‐transfer properties. It is noted that a pair of structural isomers ( 5 and 6 ) has been obtained, respectively, where distinguishable UV/Vis and fluorescence spectra, electrochemical activity, thermal stability , and bandgaps are observed. Furthermore, compounds 6 , 8 , 10 , 11 , 13 , and 15 exhibit excellent thermal stability , and the Td 10 values for them are found to range from 524 to 646 °C, which can be regarded as one of the best groups of thermally stable compounds among organic small molecules. In addition, theoretical calculations were performed, and the structure–property relationships were examined to reveal the effects of the position and number of donor arms on the DPPZ acceptor core.