THERMAL SENSITIVE FLUORESCENT HYPERBRANCHED POLYMER WITHOUT ANY FLUOROPHORES
In recent years, many dendritic macromolecules which respond to light, pH, ionic strength or temperature, have been considered as smart polymers because the potential application for triggered release of encapsulated activates via different chemical stimuli.1-4 However, a dendritic polymer with both light-sensitive and thermal-sensitive properties has not been reported before. A thermallight dual response hyperbranched polymer Polyethylenimine-grafted-cyclohexane carboxylic acid (PEI-CCA) was designed and synthesized by introducing hydrophobic cyclohexyl units to the terminals of hyperbranched polyethylenimine (PEI) as presented in scheme 1. Proper amounts of hydrophobic cyclohexyl units endue PEI-CCA with a hydrophobic-hydrophilic balance which leads to the thermo sensitive property. And the peripheral modifier of PEI endues the resultant hyperbranched polymer strong fluorescence as shown in Figure 1. Both temperature response and fluorescence response can be controlled by adjusting the ratio of cyclohexyl groups.
Pingli Wang Xin Wang Kun Meng He Cheng Charles C.Han
State Key Laboratory of Polymer Physics and Chemistry,Joint Laboratory of Polymer Science and Materials,Beijing National Laboratory for Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
407-408
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）