基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备...基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备了接枝型农药抗蚜威分子印迹膜（MIM）。采用红外光谱（FITR）和光学显微镜（OM）对该分子印迹膜进行表征,通过等温结合实验与竞争吸附实验,考察了抗蚜威分子印迹膜的分子识别性能与机理。以该印迹膜作为敏感膜,构建了抗蚜威电位型传感器,并对其检测性能进行了考察。结果表明,所制备的接枝型印迹膜对模板抗蚜威分子具有特异的识别选择性和优良的结合亲和性,结合容量高达92μg/cm2,相对于分子结构与抗蚜威相似的阿特拉津,印迹膜对抗蚜威的选择性系数为4.537。在p H 4.0的水介质中,传感器膜电极的电位响应与抗蚜威浓度对数在1.0×10-6~1.0×10-3mol/L范围内呈良好的线性关系（r=0.999 9）,其检出限为2.5×10-8mol/L;以抗蚜威分子印迹膜为敏感膜所构建的电位型传感器,其构建过程简捷,检测灵敏准确,电位响应快速（t〈10 s）。展开更多
A non-sulfur chemosensor based on an easy to prepare double naphthalene Schiff base is reported for the colorimetric and fluorometric dual-channel sensing of Hg2+ ions by taking advantage of the twisted intramolecular...A non-sulfur chemosensor based on an easy to prepare double naphthalene Schiff base is reported for the colorimetric and fluorometric dual-channel sensing of Hg2+ ions by taking advantage of the twisted intramolecular charge transfer (TICT) mechanism. This work provides a novel approach for the selective recognition of mercury ions. Moreover, this sensor serves as a potential recyclable component in sensing materials and the complex L-Hg2+ (L = 1-[(2-naphthalenylimino)methyl]-2-naphthalenol) can therefore be used as a fluorescent sensor for iodine anions. Notably, the color changes are very significant and all the recognition and recycling processes can be observed by the naked eye.展开更多
文摘基于分子设计,以氯甲基化聚砜（CMPSF）为基膜,阴离子单体对苯乙烯磺酸钠（SSS）为功能单体,N,N＇-亚甲基双丙烯酰胺（MBA）为交联剂,在表面引发体系-NH2/S2O2-8的作用下,采用＂接枝聚合与分子印迹同步进行＂的分子表面印迹新技术,制备了接枝型农药抗蚜威分子印迹膜（MIM）。采用红外光谱（FITR）和光学显微镜（OM）对该分子印迹膜进行表征,通过等温结合实验与竞争吸附实验,考察了抗蚜威分子印迹膜的分子识别性能与机理。以该印迹膜作为敏感膜,构建了抗蚜威电位型传感器,并对其检测性能进行了考察。结果表明,所制备的接枝型印迹膜对模板抗蚜威分子具有特异的识别选择性和优良的结合亲和性,结合容量高达92μg/cm2,相对于分子结构与抗蚜威相似的阿特拉津,印迹膜对抗蚜威的选择性系数为4.537。在p H 4.0的水介质中,传感器膜电极的电位响应与抗蚜威浓度对数在1.0×10-6~1.0×10-3mol/L范围内呈良好的线性关系（r=0.999 9）,其检出限为2.5×10-8mol/L;以抗蚜威分子印迹膜为敏感膜所构建的电位型传感器,其构建过程简捷,检测灵敏准确,电位响应快速（t〈10 s）。
基金supported by the National Natural Science Foundation of China (21064006, 21161018)the Natural Science Foundation of Gansu Province (1010RJZA018)the Program for Changjiang Scholars and Innovative Research Teams in Universities of the Ministry of Education of China (IRT1177)
文摘A non-sulfur chemosensor based on an easy to prepare double naphthalene Schiff base is reported for the colorimetric and fluorometric dual-channel sensing of Hg2+ ions by taking advantage of the twisted intramolecular charge transfer (TICT) mechanism. This work provides a novel approach for the selective recognition of mercury ions. Moreover, this sensor serves as a potential recyclable component in sensing materials and the complex L-Hg2+ (L = 1-[(2-naphthalenylimino)methyl]-2-naphthalenol) can therefore be used as a fluorescent sensor for iodine anions. Notably, the color changes are very significant and all the recognition and recycling processes can be observed by the naked eye.
