A Highly Selective On/Off Fluorescence Sensor for Cadmium(II)

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• 作者：Qiang Zhao ; Rui-Fang Li ; Sheng-Kai Xing ; Xiu-Ming Liu ; Tong-Liang Hu ; Xian-He Bu
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：October 17, 2011
• 年：2011
• 卷：50
• 期：20
• 页码：10041-10046
• 全文大小：919K
• 年卷期：v.50,no.20(October 17, 2011)
• ISSN：1520-510X

文摘

A polypyridyl ligand, 2,3,6,7,10,11-hexakis(2-pyridyl)dipyrazino[2,3-f:2鈥?3鈥?h]quinoxaline (HPDQ), was found to have excellent fluorescent selectivity for Cd²⁺ over many other metal ions (K⁺, Na⁺, Ca²⁺, Mg²⁺, Mn²⁺, Fe²⁺, Ni²⁺, Co²⁺, Cu²⁺, Ag⁺, Hg²⁺, Zn²⁺, and Cr³⁺) based on the intramolecular charge-transfer mechanism, which makes HPDQ a potential fluorescence sensor or probe for Cd²⁺. An obvious color change between HPDQ and HPDQ + Cd²⁺ can be visually observed by the naked eye. The structure of the complex HPDQ-Cd has been characterized by X-ray crystallography. Density functional theory calculation results on the HPDQ and HPDQ-Cd complexes could explain the experimental results.