摘要
报道了一种罗丹明B衍生物(RM)填充的SiO_(2)反蛋白石光子晶体薄膜作为荧光传感平台,实现了对Hg^(2+)的高灵敏、高选择性、可重复性检测。RM与Hg^(2+)发生专一的配位作用,其产物RMHg^(2+)在585 nm处发射荧光。当所选光子晶体的光子禁带蓝带边与荧光波长重叠时,光子晶体的慢光子效应能够有效增强RM-Hg^(2+)的荧光强度,提高检测Hg^(2+)的灵敏度,最低检出限为2.1 nmol/L,且具有良好的选择性和抗干扰性。此外,基于Hg^(2+)与EDTA更强的络合作用,传感薄膜可被EDTA再次激活而重复用以检测Hg^(2+)。该光子晶体荧光传感薄膜为设计检测其他金属离子传感平台提供了新策略。
A Rhodamine B derivative infiltrated SiO_(2)inverse opal photonic crystal(IOPC)is reported as a fluorescence sensing platform for the detection of Hg^(2+)ions with high sensitivity,selectivity and reusability.The fluorescent probe RM can specifically coordinate with Hg^(2+)ions,and the product emitted fluorescence at 585 nm.When the photonic stopband blue-band edge of the selected photonic crystal overlapped with the fluorescence wavelength,the slow photon effect of the photonic crystal can effectively enhance the fluorescence intensity of the complex RMHg^(2+)and improve the detection sensitivity.The limit of detection was 2.1 nmol/L,and the censing film has high selectivity and anti-interference.In addition,the sensing film can be reactivated by EDTA and can be reused to detect Hg^(2+)based on the stronger coordination between Hg^(2+)and EDTA.The constructed photonic crystal fluorescence sensing film provides a new strategy for designing sensing platforms of other metal ions.
作者
李恒
沙夜龙
孙溢敏
冯广东
韩波
张玉琦
LI Heng;SHA Yelong;SUN Yimin;FENG Guangdong;HAN Bo;ZHANG Yuqi(Yan’an Key Laboratory of New Energy&New Functional Materials,Shaanxi Key Laboratory of Chemical Reaction Engineering,School of Chemistry and Chemical Engineering,Yan’an University;Yan’an Oil and Gas Products Quality Inspection and Testing Co.Ltd.,Yan’an 716000,China)
出处
《延安大学学报(自然科学版)》
2022年第1期20-26,共7页
Journal of Yan'an University:Natural Science Edition
基金
国家自然科学基金项目(22061041)
陕西省科技资源开放共享平台项目(2021PT-004)
陕西省自然科学基金项目(2020JQ-789)
延安大学博士科研启动基金项目(YDBK2019-60)。