高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (10): 1751.doi: 10.7503/cjcu20170139

• 分析化学 • 上一篇    下一篇

双氰基二苯代乙烯型双光子荧光汞离子探针

黄池宝1,2(), 潘淇1, 陈晓远2, 赵光练1, 陈华仕1, 梁兴1, 吕国岭1   

  1. 1. 遵义师范学院化学化工学院, 遵义563002
    2. 韶关大学农业科学与工程学院, 韶关 512005
  • 收稿日期:2017-03-08 出版日期:2017-10-10 发布日期:2017-09-20
  • 作者简介:联系人简介: 黄池宝, 男, 博士, 教授, 主要从事双光子荧光探针研究. E-mail:huangchibao@163.com
  • 基金资助:
    贵州省高层次创新型人才培养计划项目——“百”层次人才(批准号: 黔科合平台人才[2016]5683)、 国家自然科学基金(批准号: 21562050)、 贵州省第八批科技创新人才团队建设专项基金[批准号: 黔科合人才团队(2015)4007]、 贵州省科学技术基金项目(批准号: 黔科合J字[2015]2146)、 贵州省教育厅自然科学重点研究项目(批准号: 黔教合KY字[2014]296)、 贵州省教育厅省级本科教学工程建设项目(批准号: 黔教[2014]JXGChcb)、 遵义市“15851人才精英工程”项目[批准号: (2015)4007]和遵义市红花岗区科学技术项目(批准号: 遵红科合社字[2015]18)资助

Dicyanostilbene-derived Two-photon Fluorescence Probe for Mercury Ions

HUANG Chibao1,2,*(), PAN Qi1, CHEN Xiaoyuan2, ZHAO Guanglian1, CHEN Huashi1, LIANG Xing1, LÜ Guoling1   

  1. 1. Chemistry and Chemical Engineering College, Zunyi Normal University, Zunyi 563002, China
    2. College of Agricultural Science and Engineering, Shaoguan University, Shaoguan 512005, China
  • Received:2017-03-08 Online:2017-10-10 Published:2017-09-20
  • Contact: HUANG Chibao E-mail:huangchibao@163.com
  • Supported by:
    † Supported by the Guizhou Provincial High-Level Innovative Talents Training Project-Hundred Talents Program, China(No.[2016]5683), the National Natural Science Foundation of China(No.21562050), the Special Fund Project of the Construction of the Eighth Batch of Scientific and Technological Innovation Talent Team in Guizhou Province, China [No.(2015)4007], Guizhou Science and Technology Fund Project, China(No.J[2015]2146), the Key Project of Education Department of Guizhou Province, China(No.KY[2014]296), the Teaching Contents and Curriculum System Reform Project of Higher Education in Guizhou Province, China(No.KY [2014] JXGChcb), the Project of “15851 Talents Elite Project” in Zunyi City, China [No.(2015)4007] and the Science and Technology Project of Honghuagang District in Zunyi City, China(No.[2015]18)

摘要:

分别以双氰基二苯代乙烯(DCS)和双[2-(2-羟乙基硫基)乙基]氨(HSA)为双光子荧光团和汞离子受体, 合成了双光子荧光汞离子探针(DHg), 并对其结构进行了分析. 实验结果表明, DHg在甲苯、 乙腈和水中的荧光量子产率(Φ)分别为0.78, 0.42和0.20, 对汞离子的络合常数通过单、 双光子荧光滴定分别拟合为lgK=5.47±0.02和lgK=5.34±0.02. DHg在水溶液中对汞离子具有优良的选择性和高的灵敏性, 可用于中性环境中汞离子的检测. DHg的双光子吸收截面(δTPA)在水溶液中高达840 GM, 可用于细胞中汞离子的检测与成像.

关键词: 双光子荧光探针, 汞离子, 活体成像, 双光子吸收截面

Abstract:

A novel water-soluble two-photon fluorescent probe for Hg2+(DHg) derived from dicyanostilbene(DCS) as a two-photon fluorophore and bis[2-(2-hydroxyethyl sulfanyl) ethyl]amino group(HAS) as a novel Hg2+ ligand was developed, and its structure was analyzed and identified. The results of UV-Vis absorption and absorption-titration experiments, one- and two-photon excited fluorescence experiments, as well as cellimaging and tissue-imaging experiments showed that the probe has a very high sensitivity and selectivity for the detection of Hg2+ in water. It can be used to detect trace Hg2+ in neutral or basic aqueous solution(pH=7—12), and its binding constant(lgK) for Hg2+ was determined from the one- and two-photon fluorescence-titration curves to be lgK=5.47±0.02 and lgK=5.34±0.02, respectively. Nitrogen atom property and the sulfur atom number on the ionophore are believed to be responsible of the unique selectivity of probe DHg for Hg2+. The fluorescent quantum yields of DHg in toluene, acetonitrile and water are 0.78, 0.42 and 0.20, respectively, and its two-photon absorption cross-section(δTPA) is as high as 840 GM in aqueous solution. The probe could selectively detect free Hg2+ ions in live cells without interference from other metal ions and the membrane-bound probes. Undoubtedly, the probe is an ideal two-photon excited fluorescence bioimaging candidate.

Key words: Two-photon fluorescence probe, Mercury ion, Live-imaging, Two-photon absorption across-section

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