Photoluminescence Control of Cellulose via Surface Functionalization Using Oxidative Polymerization,Biomacromolecules

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Photoluminescence Control of Cellulose via Surface Functionalization Using Oxidative Polymerization
Biomacromolecules ( IF 5.5 ) Pub Date : 2017-10-23 00:00:00 , DOI: 10.1021/acs.biomac.7b01067
Thien An Phung Hai ₁ , Ryuichi Sugimoto ₁

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Control of the photoluminescence properties of cellulose is conducted by introduction of conducting polymers including fluorene (F) and 3-hexylthiophene (3HT) on cellulose surface through FeCl₃ oxidative polymerization. The UV–vis absorption peak of cellulose grafted with the 3-hexylthiophene and fluorene copolymer was increasingly blue-shifted with increasing fluorene content and the shift in the peak position in photoluminescence spectra depend on the initial 3HT:F ratio of the copolymer. The crystallinity and thermal stability of cellulose decreased slightly upon graft polymerization with PF and P3HT, while the quantum yield, determined using absolute methods, increased from 3.1 to 9.7% with increasing fluorene content. The roles of the 3HT and F copolymers in improving the properties of cellulose were thoroughly studied by FT-IR, UV–vis, fluorescence, X-ray diffraction (XRD), thermogravimetric (TG), transmission electron microscopy-energy dispersive X-ray (TEM-EDX), and quantum yield measurements. Mechanistic insight into the grafting reaction is also provided.

中文翻译：

通过使用氧化聚合的表面功能化控制纤维素的光致发光

纤维素的光致发光特性的控制是通过在纤维素表面上通过FeCl ₃引入包括芴（F）和3-己基噻吩（3HT）的导电聚合物来进行的氧化聚合。随着芴含量的增加，接枝了3-己基噻吩和芴共聚物的纤维素的紫外可见吸收峰逐渐蓝移，并且光致发光光谱中峰位置的变化取决于共聚物的初始3HT：F比。用PF和P3HT接枝聚合时，纤维素的结晶度和热稳定性略有下降，而使用绝对方法测定的量子产率随着芴含量的增加从3.1提高到9.7％。通过FT-IR，UV-vis，荧光，X射线衍射（XRD），热重（TG），透射电子显微镜-能量色散X射线对3HT和F共聚物在改善纤维素性能中的作用进行了深入研究。（TEM-EDX）和量子产率测量。

更新日期：2017-10-23

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