新穎非對稱型偶氮苯之光響應超分子複合材料

李可風

doi:10.6842/NCTU.2011.00290

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新穎非對稱型偶氮苯之光響應超分子複合材料

Photoresponsive Supramolecular Complexes Based on a Novel Asymmetrcial Azobenzene Molecules

李可風 , Masters　　Advisor：張豐志　　

繁體中文 DOI： 10.6842/NCTU.2011.00290

聚酯；偶氮苯；光響應超分子； PCL ； Azobenzene ； Photoresponsive Supramolecular

Abstract │ Reference (56) │ Altmetrics

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Nucleobase-grafted biocompatible polyester was transformed into non-covalent network film through biocomplementary hydrogen bonding recognition in the presence of diamidopyridine-based dye molecules (DAP). A series of biomimetic copolymers, poly(εCL-g-Uracil)were synthesized through combination of sequential ring-opening and click chemistry. Wide-angle X-ray diffraction, OM and Differential scanning calorimetry indicate that Grafting this multiple hydrogen bonding motif onto poly(ε-caprolactone) dramatically destroy the crystalline as a result of formation of supramolecular polymer. The Biomimetic graft polyesters prepared in this study are shown to be biocompatible by in vitro cytotoxicity, suggesting their suitability for biomaterial applications. Specific interactions between polymer-azobenzene supramolecular structures of RNA-like diblock copolymer and their molecular recognition mediated by hydrogen bonding interactions were investigated in detail. The polymer-azobenzene complexes can be used to alter material behavior with light, switching both optical and thermal properties. The AFM micrograph shows Remarkable changes in the surface morphology and the contact angle with water were also observed. In addition, dynamic light scattering analyses provided evidence for “light-controlled aggregation” in these blend systems.

Reference ( 56 ) 〈TOP〉

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[2] Wilson, A. J.Soft Matter, 2007, 3, 409.
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[13] Ziauddin, J.; Sabatini, D. M. Nature 2001, 411, 107.
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