A novel fluorescence "turn-on" sensor based on a photochromic diarylethene for the selective detection of Al(III)

作者：Wang, Niansheng; Wang, Renjie^*; Tu, Yayi; Pu, Shouzhi^*; Liu, Gang

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2018, 196: 303-310.

DOI：10.1016/j.saa.2018.02.018

• Photochromism
• Diarylethene
• Fluorescence switch
• Sensor
• Al3+ recognition

A novel photochromic diarylethene with a triazole-containing 2-(2'-phenoxymethyl)-benzothiazole group has been synthesized via "click" reaction. The diarylethene exhibited good photochromism and photoswitchable fluorescence. Its fluorescence emission intensity was enhanced 7-fold by acids, accompanied by the red-shift of emission peak from 526 nm to 566 nm and the concomitant color change from dark to bright flavogreen. The diarylethene selectively formed a 1:1 metal complex with Al3+, resulting in a "turn-on" fluorescence signal. The complexation - reaction between Al3+ and the diarylethene is reversible with the binding constant of 2.73 x 10(3) L mol(-1). The limit of detection (LOD) of Al3+ was determined to be 5.94 x 10(-8) mol L-1. Based on this unimolecular platform, a logic circuit was fabricated using the fluorescence emission intensity at 572 nm as the output and the combined stimuli of Al3+/EDTA and UV/Vis as the inputs.

• 出版日期2018-5-5
• 单位南昌大学; 江西科技师范大学