摘要
报道了一个对Pb2+具有很好选择性的探针1,其荧光团部分为:1,4-二氰基-2,5-联(苯乙烯基)苯;配体为:[(2-羧基甲氧基-苯基)-羧基甲基-胺基]-乙酸.在探针1的水溶液中滴加铅离子,它的荧光发射光谱发生变化,在590nm处出现一个新的宽带峰.探针1在生理环境的pH范围内不受pH的影响,并且在740nm,它的双光子吸收截面为最大:51GM.
A new fluorescent sensor (1) for Pb^2+ containing a 1,4-dicyano-2,5-bis(styryl) benzene fluorophore and 2-(N,N'-bis(carboxylmethyl))amino-1-carboxylmethoxylbenzene as receptor has been synthesized. The sensor selectively responds to Pb^2+ in aqueous environment, and brings about similar and significant changes in one- and two-photon excited emission spectra: λmax red-shift from 460(519) to 590 nm. The selective response is pH-independent in a large physiological pH range, and two-photon action cross section (δφ) is 51 GM(1 GM = 1×10^-50 cm^4.s-photon^-1.molecule^-1) at 740 nm.
出处
《中国科学(B辑)》
EI
CSCD
北大核心
2009年第6期541-547,共7页
Science in China(Series B)
基金
国家自然科学基金(批准号:207025621
20706008)
国家重点基础研究发展计划(编号:2009CB724706)
国家教育部"长江学者"和创新团队(IRT0711)项目资助
关键词
双光子
荧光探针
铅离子
水环境
双光子吸收截面
化学传感器
探针
two-photon, fluorescent sensor, lead ion, aqueous environment, two-photon action cross section, chemosensor, sensor