Solvent-induced luminescence behavior of NH2-MIL-53(Fe) in H2O and D2O: a potential approach for D2O detection

An anomalous solvent-induced luminescence quenching of NH2-MIL-53(Fe) in D2O is reported. Contrary to conventional understanding, the quenching is originated from the inhibition of charge transfer by hydrogen bonding between NH2-MIL-53(Fe) and D2O, rather than protonation or high-frequency vibrations of solvent molecules. This enables accurate quantitative detection towards specific volume fractions of D2O in H2O.