Dynamic self-assembled polymer: HCl responsive inversion of supramolecular polymer handedness

Content Provider	Semantic Scholar
Author	Paikar, Arpita Haldar, Debasish
Copyright Year	2017
Abstract	A series of discotic tricarboxyamides with varied amino acid side arm functionality and their HCl responsive diverse self-assembly behavior and formation of dynamic polymer is studied. Discotic trisamide 1 obtained from Boc protected L-Lys self-assembled into a long fibrillar aggregate-like supramolecular P helical polymer. However, on addition of HCl, the supramolecular helical handedness of the assemblies is completely inverted. Irrespective of the chiral centres configuration, supramolecular chiral bias is arising from molecular conformations. FE-SEM reveals the formation of right handed entangled polymeric fibers. However, left handed entangled fibers have appeared on addition of 0.12 M HCl. The trisamide 2 containing Boc protected L-Trp exhibits disk like morphology both in the presence and absence of 0.12 M HCl and does not show a change of supramolecular handedness. This demonstrates how remarkably distinct morphologies originate from stimuli responsive building blocks assembled in a subtly different manner.
Starting Page	47170
Ending Page	47176
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1039/C7RA08035B
Alternate Webpage(s)	https://pubs.rsc.org/en/content/articlepdf/2017/ra/c7ra08035b?page=search
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/ra/c7ra08035b/c7ra08035b1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C7RA08035B
Volume Number	7
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article