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题名: Photophysical properties of rhodamine isomers: A two-photon excited fluorescent sensor for trivalent chromium cation (Cr3+)
作者: Wan, Yan;  Guo, Qianjin;  Wang, Xuefei1;  Xia, Andong
关键词: Two-photon excitation ;  Fluorescent sensor ;  Trivalent chromium ion (Cr3+) ;  Rhodamine ;  Fluorescence on/off
刊名: ANALYTICA CHIMICA ACTA
发表日期: 2010-04-30
DOI: 10.1016/j.aca.2010.03.035
卷: 665, 期:2, 页:215-220
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: We introduce a new rhodamine-based fluorescent chemosensor, FD8 which exhibits a distinct two-photon excited fluorescence (TPEF) on/off characteristic upon binding Cr3+ ions. By coordination with metal cation, conformation of FD8 changes from spirocyclic to open-ring, resulting in remarkable enhancement of absorption and fluorescence both in one- and two-photon excitations. As a result, a 29-fold enhancement of two-photon excited fluorescent intensity was observed when 10 eq. Cr3+ was added to the FD8 solution. The detection limit of Cr3+ cation concentration down to 1 mu M (0.01 eq. of FD8) was achieved under our experimental condition. Besides the excitation within ultraviolet regime by fluorescence resonance energy transfer (FRET) mechanism, the TPEF on/off behavior further extends the excitation to near infrared regime (the biological optimal window of 700-1200 nm), and shows more effective sensitivity. The broad excitation wavelength, on/off fluorescence and high selectivity to Cr3+ enable FD8 to be a powerful Cr3+ cation sensor with potential application, especially in biological detection. To the best of our knowledge, this is the first report about two-photon fluorescent sensor for Cr3+ ions. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: ABSORPTION CROSS-SECTION ;  AQUEOUS-SOLUTION ;  METAL-IONS ;  OFF-ON ;  LIVING TISSUE ;  CALCIUM WAVES ;  LIVE TISSUE ;  HG2+ IONS ;  CHEMOSENSOR ;  PROBE
语种: 英语
WOS记录号: WOS:000277854500014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142198
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, BNLMS, Beijing 100190, Peoples R China

Recommended Citation:
Wan, Yan,Guo, Qianjin,Wang, Xuefei,et al. Photophysical properties of rhodamine isomers: A two-photon excited fluorescent sensor for trivalent chromium cation (Cr3+)[J]. ANALYTICA CHIMICA ACTA,2010,665(2):215-220.
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