Study on the Tunable LCST Properties of Phenylalaninate Derivative with Branching Oligoethyleneoxy Chains
Pan Yu
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Kundan Hao
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Zhou Yang
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Liangchun Li *
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
*Author to whom correspondence should be addressed.
Abstract
Thermosensitive amino acid derivative with oligoethyleneoxy chains with tunable lower critical solution temperature (LCST) were prepared from L-methyl phenylalaninate and 3,5-diaminobenzoic acid derivative with oligoethyleneoxy chains. The solution properties and the effects of salt ion species on LCST of phenylalaninate derivative 11 were investigated by UV-vis. The results indicate that the LCST value of 11 could be controlled by adjusting the salt concentration with different cationic species.
Keywords: Metal ions, LCST, oligoethyleneoxy, L – phenylalanine