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Star‐Shaped D‐π‐A Molecules Containing a 2,4,6‐Tri(thiophen‐2‐yl)‐1,3,5‐triazine Unit: Synthesis and Two‐Photon Absorption Properties
Author(s) -
Zou Li,
Liu Zijun,
Yan Xiaobing,
Liu Yan,
Fu Yang,
Liu Jun,
Huang Zhenli,
Chen Xingguo,
Qin Jingui
Publication year - 2009
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.200900641
Subject(s) - chemistry , intramolecular force , triazine , molecule , conjugated system , absorption (acoustics) , 1,3,5 triazine , two photon absorption , photochemistry , electron acceptor , acceptor , electron transfer , electron donor , crystallography , stereochemistry , polymer chemistry , organic chemistry , polymer , catalysis , laser , physics , acoustics , optics , condensed matter physics
A series of new star‐shaped donor‐π‐acceptor (D‐π‐A) molecules containing the 2,4,6‐tri(thiophen‐2‐yl)‐1,3,5‐triazine unit were synthesized and characterized. The 1,3,5‐triazine group, as a strong electron‐accepting center, is connected to three electron‐donating end groups through π‐conjugated bridges. As a result of the coexistence of the electron acceptor and donor, these compounds show reversible or quasireversible redox behavior. Through changing the peripheral end group the optical properties can be modified. All compounds exhibit two‐photon absorption activity in the range of 720–880 nm and show large two‐photon absorption cross sections that are closely related to the intramolecular charge transfer and π‐conjugated length of the molecule.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)