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Semiconducting Fabrics by In Situ Topochemical Synthesis of Polydiacetylene: A New Dimension to the Use of Organogels
Author(s) -
Krishnan Baiju P.,
Mukherjee Somnath,
Aneesh Pacheri M.,
Namboothiry Manoj A. G.,
Sureshan Kana M.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201507475
Subject(s) - polymerization , hydrogen bond , molecule , in situ , polymer chemistry , polymer , fibril , self assembly , chemistry , materials science , chemical engineering , nanotechnology , organic chemistry , biochemistry , engineering
A diyne functionalized 4,6‐O‐benzylidene β‐ d ‐galactopyranoside gelator, which can align its diyne motifs upon self‐assembly (gelation) have been synthesized. The organogel formed by this gelator undergoes topochemical polymerization to polydiacetylene (PDA) under photoirradiation. This strategically designed gelator has been used to make semi‐conducting fabrics. By developing the organogel on the fabrics, the gelator molecules were made not only to self‐assemble on the fibers, but also to adhere to fabrics through hydrogen bonding. UV irradiation of the gel‐coated fabric/fiber resulted in the formation of PDA on fibers. The benzylidene motif could be deprotected to get PDA with pendant free sugars that strongly bind to the cotton fibrils through multiple hydrogen bonds. Conductivity measurements revealed the semiconducting nature of these fabrics.