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Front Cover: Peculiar Triarylamine‐Based Co‐assembled Supramolecular Polymers That Exhibit Two Transition Temperatures in the Formation of a Coiled Helical Bundle (Chem. Asian J. 19/2018)
Author(s) -
Seo Hyowon,
Go Misun,
Choi Heekyoung,
Kim Ka Young,
Choi Yeonweon,
Lee Shim Sung,
Jung Sung Ho,
Jung Jong Hwa
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801141
Subject(s) - crystallography , circular dichroism , supramolecular chemistry , polymerization , chemistry , helix (gastropod) , materials science , nucleation , supramolecular polymers , polymer , crystal structure , organic chemistry , biology , ecology , snail
The peculiar co‐assembly supramolecular polymerization behavior of triphenylamine trisamide derivatives with d ‐alanine ( T‐ala ) or glycine ( T‐gly ) moieties is described. Concentration‐ and temperature‐dependent circular dichroism (CD) spectroscopy revealed that the heating curves of co‐assemblies obtained at various molar ratios of T‐ala to T‐gly exhibited two distinct transition temperatures. The first transition was due to the transformation from coiled helical bundles to single helical fibers without handedness. The second was due to a change from typical elongation to nucleation. These phenomena were confirmed by solvent‐dependent decoiling of coiled helical structures and concentration‐dependent morphological analysis. More information can be found in the Full Paper by Sung Ho Jung, Jong Hwa Jung et al. on page 2847 in Issue 19, 2018 (DOI: 10.1002/asia.201800961).