Synthesis of a fluorescent and star-shaped 4-arm PEG with different functional groups at its ends

Dong Ik Lee, Chan Jin Kim, Chang Ha Lee, Ik Sung Ahn

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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).

Original languageEnglish
Pages (from-to)1186-1190
Number of pages5
JournalJournal of Industrial and Engineering Chemistry
Issue number3
Publication statusPublished - 2012 May 25


All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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