Preparation and characterization of metal–organic frameworks and their composite Eu2O3@[Zn2(bdc)2dabco] (ZBDh) via pulsed laser ablation in a flowing liquid†
Abstract
This work reports the compounds [Zn2(bdc)2dabco] (ZBDh) and [Zn2(bdc)2dabco] (ZBDt) and their composite Eu2O3@[Zn2(bdc)2dabco] (ZBDh) synthesized by pulsed laser ablation in flowing liquid. At an appropriate reactant concentration, phase ZDBh transforms into phase ZDBt by an increase of the irradiation time from 4 to 40 min. The results show that the Eu2O3 nanoparticles with an average size of 3.17 nm are uniformly distributed throughout the crystal and the BET specific surface area of the composite Eu2O3@[Zn2(bdc)2dabco] (ZBDh) is 1621 m2 g−1, which is larger than that of compound [Zn2(bdc)2dabco] (ZBDh). Moreover, the composite Eu2O3@[Zn2(bdc)2dabco] (ZBDh) can emit very intense characteristic fluorescence at 613 nm of the Eu3+ ion under ultraviolet radiation and can be used for detecting methanol molecules in fluorescence sensing because its fluorescence intensity at 613 nm is sensitive to the content of methanol in solvent.