三联吡啶锌配合物改性氧化纳米纤维素薄膜的溶剂致变色研究

Study on solvatochromic research of oxidized cellulose nanofibril film modified by terpyridine-zinc complex

通过制备Zn(Ⅱ)N,N-二甲基-4-[2,2′:6′,2″-三联吡啶]-4′-基苯胺(简称三联吡啶锌配合物),并将其用于配位键改性TEMPO-氧化纤维素纳米纤丝,得到具有荧光性能的改性纤维素纳米纤丝,抽滤得到三联吡啶锌配合物改性纳米纤维素薄膜(改性薄膜).借助红外光谱、X射线衍射仪对产物进行结构表征,用紫外吸收光谱、荧光光谱研究其光学性能,通过SEM观察产物的表面形貌.结果表明,三联吡啶锌配合物成功地通过配位键改性氧化纤维素纳米纤丝,并且纳米尺度没有发生变化,所得到的改性薄膜具有良好的溶剂致变色性能,在不同溶剂的刺激下,改性薄膜的荧光光谱会发生明显变化.

The zinc（II）N,N dimethyl 4 [2,2＇：6＇,2＂ terpyridine] 4＇ yl anilin ex） is prepared, and used to modify TEMPO oxidized cellulose nano e （terpyridine zinc fibril by coordina tion bond,then the modified cellulose nanofibril with fluorescence property is obtained. Fi nally, terpyridine zinc complex grafted cellulose nanofibril film （modified film） is acquired by vacuum filtration. The structure of the product is characterized using IR and X ray diffraction （XRD）. The optical property of the product is studied by UV absorption spectroscopy and fluorescence spectroscopy. The surface morphology of the product is observed by SEM. The results show that the TEMPO oxidized cellulose nanofibril is successfully modified by coor dination bonds using terpyridine zinc complex,and its nanoscale has not changed. The modi fied film with good solvatochromic performance was obtained. The fluorescence spectrum of the modified film would occur obvious changes under the stimulation of different solvents.