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Synthesis, Crystal Structure, and Physical Property of Sterically Unprotected Thiophene/Phenylene Co‐Oligomer Radical Cations: A Conductive π – π Bonded Supermolecular meso ‐Helix
Author(s) -
Chen Xiaoyu,
Ma Binbin,
Chen Shuang,
Li Yizhi,
Huang Wei,
Ma Jing,
Wang Xinping
Publication year - 2013
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.201200819
Subject(s) - oligomer , steric effects , phenylene , thiophene , polymer chemistry , electron paramagnetic resonance , chemistry , crystallography , stacking , materials science , photochemistry , polymer , stereochemistry , organic chemistry , physics , nuclear magnetic resonance
Sterically unprotected thiophene/phenylene co‐oligomer radical cation salts BPnT .+ [Al(OR F ) 4 ] − (OR F =OC(CF 3 ) 3 , n =1–3) have been successfully synthesized. These newly synthesized salts have been characterized by UV/Vis‐NIR absorption and EPR spectroscopy, and single‐crystal X‐ray diffraction analysis. Their conductivity increases with chain length. The formed meso ‐helical stacking by cross‐overlapping radical cations of BP2T .+ is distinct from previously reported face‐to‐face overlaps of sterically protected (co‐)oligomer radical cations.