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Molecular captain: A light-sensitive linker molecule in poly(ethylene glycol)-poly(L -alanine)-poly(ethylene glycol) triblock copolymer directs molecular nano-assembly, conformation, and sol-gel transition

Title
Molecular captain: A light-sensitive linker molecule in poly(ethylene glycol)-poly(L -alanine)-poly(ethylene glycol) triblock copolymer directs molecular nano-assembly, conformation, and sol-gel transition
Authors
Jeong S.Y.Moon H.J.Park M.H.Joo M.K.Jeong B.
Ewha Authors
정병문
SCOPUS Author ID
정병문scopus
Issue Date
2012
Journal Title
Journal of Polymer Science, Part A: Polymer Chemistry
ISSN
0887-624XJCR Link
Citation
vol. 50, no. 15, pp. 3184 - 3191
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report a poly(ethylene glycol)-poly(L-alanine)-azobenzene-poly(L- alanine)-poly(ethylene glycol) (PEG-PA-Z-PA-PEG) as a temperature and light sensitive polymer. The poly(ethylene glycol)-poly(L-alanine) diblock copolymers with a flexible-rigid block structure were coupled by an azobenzene group that undergoes a reversible configurational change between "trans" and "cis" upon exposure to UV and vis light. The single azobenzene molecule embedded in the middle of a block copolymer with a flexible (shell)-rigid (core) structure significantly affected molecular assembly, micelle size, polypeptide secondary structure, and sol-to-gel transition temperature of the polymer aqueous solution, depending on its exposure to UV or vis light. © 2012 Wiley Periodicals, Inc.
DOI
10.1002/pola.26104
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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