A coumarin-based fluorescent probe for the fast detection of Pd-0 with low detection limit

作者：Liu, Yunchang; Xiang, Kaiqiang; Guo, Min; Tian, Baozhu; Zhang, Jinlong^*

来源：Tetrahedron Letters, 2016, 57(13): 1451-1455.

DOI：10.1016/j.tetlet.2016.02.062

• Pd-0
• Fluorescent probe
• Coumarin
• Low detection limit

A off-on coumarin-based fluorescent probe for the fast detection of Pd-0 is designed and synthesized. The probe shows not only good selectivity but also fast response to Pd-0 in phosphate buffered saline (PBS) solution. The absorption band at 412 nm rises sharply as well as the fluorescence at 450 nm after the addition of Pd-0 within few minutes. The detection limit is as low as 0.34 nM. The probe shows nonfluorescence when it conjuncted with allyl carbonate ester which destroys the Intramolecular Charge Transfer (ICT) system. The effect of Pd-0 to the probe can change the structure and make the departure of the conjuncted allyl carbonate ester. As a result, the fluorogen is exposed and it shows fluorescence.

• 出版日期2016-3-30
• 单位华东理工大学