A highly selective optical probe for sensing of Fe3+ based on a water-soluble croconaine

作者：Ye, Shouchen; Zhang, Chen; Mei, Jinfeng; Li, Zhongyu^*; Xu, Song; Li, Xiazhang; Yao, Chao^*

来源：Journal of Photochemistry and Photobiology A: Chemistry , 2017, 347: 130-137.

DOI：10.1016/j.jphotochem.2017.07.034

• Water-soluble optical probe
• Croconaine
• Iron ion (III)
• Molecular logic gate
• Test strips

A highly selective water-soluble optical probe, 2,5-bis[2,3,3-trimethyl-3H-indole-5-sulfonic acid]-croconaine (TISC) was successfully synthesized. TISC can efficiently recognize Fe3+ with the existence of competing cations (Nat, Mg2+, Al3+, Cr3+, Zn2+, K+, Ca2+, Ba2+, Pb2+, Ni2+, Co2+, Ag+, Cu2+, Cd2+) in deionized water. The binding constant (K-a) of TISC-Fe3+ was calculated to be about 3.071 x 10(4)M(-1). Correspondingly, the chelating mode of TISC-Fe3+ was confirmed by,Job's plot, FT-IR and H-1 NMR. Moreover, Fe3+ and EDTA could be employed as inputs and the absorbance which was 745 nm as output so that a molecular logic gate could be realized, and the test strips of TISC showed a high selectivity to Fe3+.

• 出版日期2017-10-1
• 单位常州大学