Preparation and luminescence performance of flexible films based on curdlan derivatives and europium (III) complexes as luminescent sensor for base/acid vapor
Preparation and luminescence performance of flexible films based on curdlan derivatives and europium (III) complexes as luminescent sensor for base/acid vapor
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DOI：
10.1016/j.jlumin.2020.117241
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发表时间：
2020-09
影响因子：
3.6
通讯作者：
Sun Yingjian-;Liang Qingfeng;Shuai Wei;Zhao Ruichun-;Han Jingfen-;Guichen Ping
中科院分区：
文献类型：
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作者：
Sun Yingjian-;Liang Qingfeng;Shuai Wei;Zhao Ruichun-;Han Jingfen-;Guichen Ping
在此，我们提出了一种用琥珀酸（SA）或离子液体（IL）对胺化凝胶多糖进行化学改性的天然多糖合成水溶性生物聚合物的替代路线，并在水性条件下由铕（III）纳米粘土络合物和上述生物聚合物组成的均匀溶液制成了一系列透明且发光的柔性自支撑薄膜。与不含凝胶多糖衍生物的薄膜相比，水溶性修饰凝胶多糖的存在可以显着提高薄膜的发光效率并改善光致发光稳定性。当将薄膜暴露于三乙胺蒸气时，发光强度进一步显着增强，而暴露于HCl蒸气时发生明显的发光猝灭。这些薄膜令人鼓舞的光电探测器和蒸汽敏感的发光传感器。
Herein we manifested an alternative route to synthesize water-soluble biopolymers from natural polysaccharides by chemically modifying aminated curdlan with succinic acid (SA) or ionic liquid (IL), and a series of flexible self-standing films were made from the homogeneous solutions consisting of europium(III) complexes in nanoclay and the above biopolymers under aqueous conditions, which are transparent and luminescent. Compared to film without curdlan derivatives, the presence of water-soluble decorated curdlan can significantly enhance the luminescence efficiency and improve photoluminescent stability of the films. Enhancements of the luminescent intensity were further remarkable when exposing the films to triethylamine vapor, while obvious luminescence quenching occurred upon exposure to HCl vapor. The films are encouraging optoelectronic detectors and vapor-sensitive luminescent sensors.