Fluorescent sensors for Ca(2+) and Pb(2+) based on binaphthyl derivatives.
Two novel binaphthyl compounds have been synthesized for the selective fluorescent recognition of Ca(2+) or Pb(2+). By introducing different terminal groups to the receptor unit, the fluorescence signals of the receptors are significantly changed: 1 is fluorescence enhancement for Ca(2+), 2 is fluorescence quenching for Pb(2+). The binding properties for metal ions were examined by the absorption and fluorescence spectra. The fluorescence intensity enhancement was ascribed to the complex formation between Ca(2+) and 1 which blocked the photo-induced electron transfer process.
Wang
Ya-Wen
YW
State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China. ywwang@lzu.edu.cn
Shi
Yong-Tao
YT
Peng
Yu
Y
Zhang
Ai-Jiang
AJ
Ma
Tian-Hua
TH
Dou
Wei
W
Zheng
Jiang-Rong
JR
D002118:Calcium / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D007854:Lead / Q000032:analysis*; D009281:Naphthalenes / Q000138:chemical synthesis / Q000737:chemistry*; D055095:Optics and Photonics; D010777:Photochemistry
D005456:Fluorescent Dyes; D009281:Naphthalenes; D007854:Lead; D002118:Calcium