Intermolecular Structural Change for Thermoswitchable Polymeric Photosensitizer.
Intermolecular Structural Change for Thermoswitchable Polymeric Photosensitizer.
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DOI:
10.1021/jacs.6b04875
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发表时间:
2016-08-31
影响因子:
15
通讯作者:
Kim DH
中科院分区:
文献类型:
--
作者:
Park W;Park SJ;Cho S;Shin H;Jung YS;Lee B;Na K;Kim DH
We developed a thermoswitchable polymeric photosensitizer (T-PPS) by conjugating PS (Pheophorbide-a, PPb-a) to a temperature-responsive polymer backbone of biocompatible hydroxypropyl cellulose. Self-quenched PS molecules linked in close proximity by π–π stacking in T-PPS were easily transited to an active monomeric state by the temperature-induced phase transition of polymer backbones. The temperature-responsive intermolecular interaction changes of PS molecules in T-PPS were demonstrated in synchrotron small-angle X-ray scattering and UV–vis spectrophotometer analysis. The T-PPS allowed switchable activation and synergistically enhanced cancer cell killing effect at the hyperthermia temperature (45 °C). Our developed T-PPS has the considerable potential not only as a new class of photomedicine in clinics but also as a biosensor based on temperature responsiveness.
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