Solvothermal synthesis and device fabrication of a Eu3+-based metal–organic framework as a turn-on and blue-shift fluorescence sensor toward Cr3+, Al3+ and Ga3+

A pH-stable and solvent-stable Eu 3+ -based MOF can selectively and sensitively recognize Cr 3+ /Al 3+ /Ga 3+ via obvious turn-on and blue-shift fluorescence. More interestingly, the fluorescence test papers and LED lamps have been successfully developed.