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Cited by 423

The DOI matches its Crossref record; 52 of the 52 references it cites were found in a registry or an index.

Stable Zr(IV)-Based Metal–Organic Frameworks with Predesigned Functionalized Ligands for Highly Selective Detection of Fe(III) Ions in Water

Wang, Bin, Yang, Qi, Guo, Chao, Sun, Yuxiu, Xie, Lin-Hua, Li, Jian-Rong·2017·ACS Applied Materials & Interfaces

Abstract

Metal–organic frameworks are a class of attractive materials for fluorescent sensing. Improvement of hydrolytic stability, sensitivity, and selectivity of function is the key to advance application of fluorescent MOFs in aqueous media. In this work, two stable MOFs, [Zr 6 O 4 (OH) 8 (H 2 O) 4 (L 1 ) 2 ] (BUT-14) and [Zr 6 O 4 (OH) 8 (H 2 O) 4 (L 2 ) 2 ] (BUT-15), were designed and synthesized for the detection of metal ions in water. Two new ligands utilized for construction of the MOFs, namely, 5′,5‴-bis(4-carboxyphenyl)-[1,1′:3′,1″:4″,1‴:3‴,1′′′′-quinquephenyl]-4,4′′′′-dicarboxylate (L 1 ) and 4,4′,4″,4‴-(4,4′-(1,4-phenylene)bis(pyridine-6,4,2-triyl))tetrabenzoate (L 2 ), are structurally similar with the only difference being that the latter is functionalized by pyridine N atoms. The two MOFs are isostructural with a sqc - a topological framework structure, and highly porous with the Brunauer–Emmett–Teller (BET) surface areas of 3595 and 3590 m 2 g –1, respectively. Interestingly, they show intense fluorescence in water, which can be solely quenched by trace amounts of Fe 3+ ions. The detection limits toward the Fe 3+ ions were calculated to be 212 and 16 ppb, respectively. The efficient fluorescent quenching effect is attributed to the photoinduced electron transfer between Fe 3+ ions and the ligands in these MOFs. Moreover, the introduced pyridine N donors in the ligand of BUT-15 additionally donate their lone-pair electrons to the Fe 3+ ions, leading to significantly enhanced detection ability. It is also demonstrated that BUT-15 exhibits an uncompromised performance for the detection of Fe 3+ ions in a simulated biological system.

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Authors
Wang, B., Yang, Q., Guo, C., Sun, Y., Xie, L.-H., & Li, J.-R.
Venue
ACS Applied Materials & Interfaces
Published
2017-03-10
Volume
9
Issue
11
Pages
10286-10295
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2593194056
Cited by
423
References
52
FWCI
21.00
Type
journal article
Language
en
Open access
closed

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