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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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聚磷腈荧光纳米纤维用于选择性检测液相中苦味酸的研究
DOI: 10.11777/j.issn1000-3304.2015.15166, PP. 1477-1485
Keywords: 聚磷腈,纳米纤维,荧光,苦味酸,选择性检测
Abstract:
以六氯环三磷腈和4,4'-二羟基二苯砜为单体,通过一步沉淀聚合制备了环交联型聚磷腈荧光纳米纤维(PZS-NF),对其化学结构、形貌、热稳定性及荧光特性进行了表征;进一步以PZS-NF为荧光化学传感器,研究了其检测液相中苦味酸(PA)的性能,并探讨了检测机理.结果表明PZS-NF的平均直径为80nm,高度交联的有机-无机杂化结构赋予了其优异的热稳定性;纳米纤维在369nm紫外光的激发下,在433nm具有显著的荧光特性,对液相中的PA表现出了高灵敏、高效和高选择性的荧光猝灭响应;优异的检测性能缘于PZS-NF结构中具有大量富电子的氮原子,通过酸碱相互作用将PA分子富集到纳米纤维表面,从而有效促进了PZS-NF与PA之间形成非荧光基态配合物,同时有利于PZS-NF向PA发生激发态能量转移.
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