A novel rhodamine B-based "off-on" fluorescent sensor for selective recognition of copper (II) ions

作者：Jiao, Yang^*; Zhou, Lu; He, Haiyang; Yin, Jiqiu; Gao, Qianmiao; Wei, Junnan; Duan, Chunying; Peng, Xiaojun

来源：Talanta, 2018, 184: 143-148.

DOI：10.1016/j.talanta.2018.01.073

• Fluorescent sensor
• Rhodamine B
• Cu2+ ions

A novel rhodamine based sensor RBH was developed and synthesized by rhodamine B with 3-methyl-2-benzothiazolinone hydrazone, which exhibited high selectivity and sensitivity for sensing Cu2+ ions in the presence of other important relevant metal ions in aqueous acetonitrile. As an "off-on" fluorescent sensor, RBH exhibited a UV vis absorption increase at 570 nm and a 132-fold significant fluorescence enhancement at 580 nm with a distinct color change from colorless to purple upon the addition of Cu2+ ions. The fluorescence intensity of RBH is linear with the Cu2+ ions concentration with low limit of detection. Furthermore, the sensor RBH has been successfully utilized for fluorescence imaging of Cu2+ ions in living cells. The sensor could potentially recognize Cu2+ ions in biological system.

• 出版日期2018-7-1
• 单位大连理工大学; 精细化工国家重点实验室