A New Reverse Photoinduced Electron Transfer Phosphoroionophore With Response to Heavy Metal Ions

Abstract

A novel phosphorescent sensor, bromonaphthyl iminodiacetic acid (BNIA), is synthesized. Room temperature phosphorescence (RTP) sensing is carried out in β‐cyclodextrin (β‐CD) aqueous solution. The RTP intensity depends on the acidity, and the maximal value is obtained at pH 5.3. The quenching effect is observed with the addition of heavy metal ions due to photoinduced electron transfer process. The quenching ability is estimated by the Stern‐Volmer method, and the detection limits of Cu²⁺, Pb²⁺, Co²⁺, and Ni²⁺ are 0.017, 0.024, 0.090, and 0.018 µmol L⁻¹, respectively (S/N = 3).

Supported from the National Natural Science Foundation of China (No. 20345004), the Natural Science Foundation of Shanxi Province (No. 20031018), the Youth Foundation of Shanxi Province (No. 20021007), and Ministry of Education of China.

Keywords:

• Phosphorescence
• photoinduced electron transfer
• heavy metal ions
• bromonaphthalene
• β‐cyclodextrin

Notes

Supported from the National Natural Science Foundation of China (No. 20345004), the Natural Science Foundation of Shanxi Province (No. 20031018), the Youth Foundation of Shanxi Province (No. 20021007), and Ministry of Education of China.