In:
Chemistry – An Asian Journal, Wiley, Vol. 10, No. 10 ( 2015-10), p. 2250-2256
Abstract:
An oligo( p ‐phenylenevinylene) (OPV) derivative connected to pyridyl end groups through an amide linkage ( OPV‐Py ) resulted in a multistimuli‐responsive π‐gelator. When compared to the corresponding OPV π‐gelator terminated by a phenyl‐amide ( OPV‐Ph ), the aggregation properties of OPV‐Py were found to be significantly different, leading to multistimuli gelation and other morphological properties. The pyridyl moiety in OPV‐Py initially interferes with the amide H‐bonded assembly and gelation, however, protonation of the pyridyl moiety with trifluoroacetic acid (TFA) facilitated the formation of amide H‐bonded assembly leading to gelation, which is reversible by the addition of N,N ‐diisopropyethylamine (DiPEA). Interestingly, addition of Ag + ions to a solution of OPV‐Py facilitated the formation of a metallo‐supramolecular assembly leading to gelation. Surprisingly, ultrasound‐induced gelation was observed when OPV‐Py was mixed with a dicarboxylic acid ( A 1 ). A detailed study using different spectroscopic and microscopic experimental techniques revealed the difference in the mode of assembly in the two molecules and the multistimuli‐responsive nature of the OPV‐Py gelation.
Type of Medium:
Online Resource
ISSN:
1861-4728
,
1861-471X
DOI:
10.1002/asia.201500331
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
2233006-9
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