A new photoinduced fluorescent switch based on a photochromic diarylethene with a rhodamine fluorophore

作者：Pu, Shouzhi^*; Wang, Taofeng; Liu, Gang; Liu, Weijun; Cui, Shiqiang

来源：Dyes and Pigments, 2012, 94(3): 416-422.

DOI：10.1016/j.dyepig.2012.02.012

• Fluorescence switch
• Photochromism
• Diarylethene
• Rhodamine fluorophore
• FRET
• Cation recognition

A new photoinduced fluorescent switch based on a photochromic diarylethene with a rhodamine fluorophore has been successfully explored. The target compound exhibits excellent photochromism with good fatigue-resistance upon photo-irradiation. Upon addition of Cr(III), the color of the diarylethene turns from colorless to pink accompanied with a 300-fold increase in fluorescence emission intensity in methanol. In the presence of Cr(III), an efficient FRET process from the rhodamine moiety (FRET donor) to the closed-ring diarylethene moiety (FRET acceptor) occurs upon UV light stimuli, and its emission intensity can be recovered upon irradiation with visible light. Also, the ability of the compound to detect metal ions has been evaluated by monitoring the changes of emission intensity in methanol. Amongst the tested metal ions, only Cr(III), AI(III) and Fe(III) are efficiently detected. The result indicates that the diarylethene can selectively recognize Cr(III) with significant color and fluorescence changes.

• 出版日期2012-9
• 单位江西科技师范大学