摘要
以丙烯酰胺(AM)和N-乙烯基咪唑(NVI)为双功能单体,借助"三明治"结构有效控制前驱液的填充,制备了可特异性识别Cu^(2+)的反蛋白石结构光子晶体水凝胶膜(PCHs).该PCHs具有相互贯通的三维有序大孔结构,可在Cu^(2+)缓冲溶液中快速响应,产生特征的布拉格(Bragg)衍射峰.随着Cu^(2+)浓度的增大(0~10-4mol/L),PCHs的Bragg衍射峰位移66 nm,并伴随着明显的颜色变化(由棕红色逐渐变为黄绿色).此外,PCHs在混合金属盐溶液中仍能实现对Cu^(2+)的特异性识别.PCHs对Cu^(2+)的特异识别性、快速响应及自表达的特点为Cu^(2+)现场快速检测提供了可能.
Inverse opals of photonic crystal hydrogels(PCHs) composed of acrylamide(AM) and N-vinyl imidazole(NVI) copolymers were fabricated for the specific detection of Cu^(2+). A "sandwich"structure was used to control the precursor infiltration in order to endow PCHs with highly ordered three-dimensional interconnected macroporous structure. The acquired PCHs produced the characteristic Bragg diffraction peak when immersed into Cu^(2+) buffers,and exhibited a rapid response. With the increase of concentration of Cu^(2+)from 0 mol/L to 10-4 mol/L,Bragg diffraction peak of PCHs blueshifted 66 nm and the color change was visible to the naked eyes(from brown to kelly green). Furthermore,PCHs exhibited efficient recognition to Cu^(2+) in the multicomponent metal ion solution. Such a specific recognition,rapid response and signal self-reporting of PCHs to Cu^(2+) provide great potential for the real-time monitor of Cu^(2+).
作者
刘士荣
秦立彦
张晓栋
陈明清
LIU Shirong QIN Liyan ZHANG Xiaodong CHEN Mingqing(Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2017年第11期1993-1998,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21571084)资助~~