The Design of Dual-Emissive Composite Material [Zn2(HL)3]+@MOF-5 as Self-Calibrating Luminescent Sensors of Al3+ Ions and Monoethanolamine

Introducing another chromophore into a luminescent MOF is a potential way to assembling novel dual-emissive luminescent materials. Putting the chromophore, for which luminescence can be enhanced by Zn2+ ion, into MOP-5 by the bottle around ship strategy is a: simple but efficient synthesis method to realize such dual-emissive materials. According to this strategy, a novel dual-emissive luminescent composite material [Zn-2(HL)(3)](+)@MOF-5 was constructed by loading, the [La-3(HL)(2)L-2(NO3)(3)H2O] (1) (H2L = 7,7'-(ethane 1,1'-diyl)8-hydro-quinoline) into MOF-5, in which the; [Zn-2(HL)(3)](+) anions were transformed from 1 with the existence of Zn2+. The dual-emissive composite materials show excellent luminescence with two emissions of MOF-5 at 410 nm and [Zn-2(HL)(3)](+) at 524 run. Furthermore, by combining characteristics of MOP-5 and the guest chromophore, the composite material is highly selectively sensitive toward Al3+ and monoethanolamine, which makes [Zn-2(HL)(3)](+)@MOF-5 a potential self-calibrated fluorescence sensor: