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

• Published in: Inorganic chemistry 2017-08, Vol.56 (16), p.9555-9562
• Main Authors: Wu, Meng-Meng, Wang, Jiao-Yang, Sun, Rui, Zhao, Cui, Zhao, Jiong-Peng, Che, Guang-Bo, Liu, Fu-Chen
• Format: Article
• Language: English
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/acs.inorgchem.7b00939

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 MOF-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 [Zn2(HL)3]+@MOF-5 was constructed by loading the [La3(HL)2L2(NO3)3H2O] (1) (H2L = 7,7′-(ethane-1,1′-diyl)­8-hydro-quinoline) into MOF-5, in which the [Zn2(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 [Zn2(HL)3]+ at 524 nm. Furthermore, by combining characteristics of MOF-5 and the guest chromophore, the composite material is highly selectively sensitive toward Al3+ and monoethanolamine, which makes [Zn2(HL)3]+@MOF-5 a potential self-calibrated fluorescence sensor.