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Pentiptycene‐Derived Oligo( p ‐phenyleneethynylene)s: Conformational Control, Chain‐Length Effects, Localization of Excitation, and Intrachain Resonance Energy Transfer
Author(s) -
Yang JyeShane,
Yan JyuLun,
Lin ChengKai,
Chen ChihYuan,
Xie ZhenYu,
Chen ChungHsuan
Publication year - 2009
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.200905405
Subject(s) - dihedral angle , excitation , excited state , conjugated system , torsion (gastropod) , relaxation (psychology) , resonance (particle physics) , polymer , twist , crystallography , chemistry , materials science , nuclear magnetic resonance , atomic physics , physics , hydrogen bond , molecule , quantum mechanics , surgery , organic chemistry , geometry , mathematics , medicine , psychology , social psychology
Do the twist : The preference of large pentiptycene–pentiptycene dihedral angles and the restricted torsional relaxation for pentiptycene‐derived oligo ( p ‐phenyleneethynylene)s in a 2‐methyltetrahydrofuran glass at 80 K result in a localized excited state. These results demonstrate not only the concept of torsion‐induced localization of excitation but also the efficient intrachain energy hopping processes in conjugated polymers.