화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.18, No.3, 1186-1190, May, 2012
Synthesis of a fluorescent and star-shaped 4-arm PEG with different functional groups at its ends
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Dityrosine (DY), which is fluorescent and biocompatible, has multiple functional groups, including two amine and two carboxylic acid groups. By conjugating PEG arms to DY, we successfully synthesized a star-shaped 4-arm PEG with two carboxylic acid and two amine groups at its four ends. Two different kinds of molecules could be further linked to this 4-arm PEG. The chemical structures and molecular weights of the intermediate 2-arm PEG and 4-arm PEG were determined by 1H NMR spectroscopy and matrix assisted laser desorption ionization-time of flight-mass spectrometry (MALDI-TOF-MS).
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