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一个新的具有双光子诱导荧光测量能力的在水中对铅离子有选择性的荧光探针 被引量:1

A new fluorescent sensor selective for Pb^(2+) in water capable of two-photon-induced fluorescence measurement
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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
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