Ion-responsive fluorescence resonance energy transfer between grafted polyacrylic acid arms of star block copolymers
作者： Seiichi Ohta , Taichi Ito , Yuki Amano , Yoshiyuki Nakagawa
DOI: 10.1016/J.POLYMER.2018.01.010
关键词:
摘要: Abstract Interactions between polyacrylic acid (PAA) arms of star block copolymers through metal ions were investigated by fluorescence resonance energy transfer (FRET). Dendritic polyester (DPE) core was grafted with copolymer oligo (ethylene glycol) methyl ether acrylate (OEGA) and PAA. Fluorescein o-methacrylate (FMA) or methacryloxyethyl thiocarbamoyl rhodamine B (MTR) introduced via copolymerization to the terminated PAA blocks. The unique structure enabled FRET chains without causing precipitation, which inevitably occurs for linear Addition such as Zn2+, Ca2+, Na+ induced FRET, order Zn2+>Ca2+≫Na+. intensity also correlated concentration each ion. Furthermore, in situ measurement during hydrogel formation performed mixing Zn2+.
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