Journal
INORGANIC CHEMISTRY
Volume 60, Issue 2, Pages 671-681Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c02629
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21771095, 21571092, 91961105, 21822107]
- Natural Science Foundation of Shandong Province [ZR2017JL013, ZR2019ZD45, JQ201803]
- Youth Innovation Team of Shandong Colleges and Universities [2019KJC027, 2019KJC028]
- Taishan Scholar Project of Shandong Province of China [tsqn201812003, ts20190908]
Ask authors/readers for more resources
The novel nanocage-based N-rich LMOF (LCU-103) with abundant N functional sites demonstrates efficient detection of toxic heavy-metal ions through a luminescent quenching mechanism. It shows low limits of detection for Fe3+ and Cu2+ ions and offers advantages such as high sensitivity, appropriate selectivity, recycling stability, and fast response times in N,N-dimethylformamide. The material also displays good luminescent quenching activity toward Fe3+ in water and a biological system, making it a promising sensor for real-time and easy detection of heavy-metal ions.
Luminescent metal-organic frameworks (LMOFs) as sensors showing highly efficient detection toward toxic heavy-metal ions are in high demand for human health and environmental protection. A novel nanocage-based N-rich LMOF (LCU-103) has been constructed and characterized. It is a 2-fold interpenetrating structure built from N-rich {Zn-6(dttz)(4)} nanocages extended by N-donor ligand Hdpa [H(3)dttz = 4,5-di(1H-tetrazol-5-yl)-2H-1,2,3-triazole; Hdpa = 4,4'-dipyridylamine]. Notably, LCU-103 contains abundant N functional sites anchoring on both the windows of nanocages and the inner channels of the framework that can interact with metal ions and then recognize them. As a result, it can serve as a luminescent sensing material for detecting trace amounts of Fe3+ and Cu2+ ions with low limits of detection (LODs) of 1.45 and 1.66 mu M, respectively, through a luminescent quenching mechanism. Meanwhile, LCU-103 as a LMOF sensor exhibits several advantages such as high sensitivity, appropriate selectivity (for Fe3+ in H2O), recycling stability, and fast response times in N,N-dimethylformamide. Moreover, LCU-103 also displays good luminescent quenching activity toward Fe3+ in H2O and a simulated 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid biological system with low LODs of 1.51 and 1.52 mu M, respectively. LCU-103 test papers were further prepared to offer easy and real-time detection of Fe3+ and Cu2+ ions. Importantly, when density functional theory calculations and multiple experimental evidence, including X-ray photoelectron spectroscopy, UV-vis absorption, luminescence decay lifetimes, and quantum efficiencies, are combined, a preferred N-donor site and possible weak interaction sensing mechanism is also proposed to elucidate the quenching effect.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available