In:
CrystEngComm, Royal Society of Chemistry (RSC), Vol. 25, No. 8 ( 2023), p. 1232-1239
Abstract:
Four MOFs with mixed ligands, [Zn 3 (3-BABA) 2 (bpa) 2 (H 2 O) 2 ] n (1), [Cd 3 (3-BABA) 2 (bpa) 2 ] n (2), [Cd 3 (3-BABA) 2 (bpe) 2 ] n (3), and {[Cd 3 (3-BABA) 2 (bib)(DMA) 2 ]·H 2 O} n (4) (where 3-H 3 BABA = 4′,4′′′-(((2-carboxyphenyl)azanediyl)bis(methylene))bis(([1,1′-biphenyl]-2-carboxylic acid)), bpa = 4,4′-azopyridine, bpe = 1,2-bis(pyridin-4-yl)ethane, and bib = 1,4-bis(imidazole)butane), have been synthesized. They are characterized by single crystal X-ray diffraction, X-ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy. In 1, two 3-BABA and two bpa bridge three Zn 2+ ions to form a bicyclic [Zn 3 (3-BABA) 2 (bpa) 2 ] unit which is further bridged by carboxylate groups with its adjacent units, resulting in a one-dimensional chain. In 2, 3 and 4, the [Cd 3 (CO 2 ) 6 ] units are bridged by six 3-BABA ligands into a three-dimensional structure. However, the adjacent [Cd 3 (CO 2 ) 6 ] units in 2 and 3 are doubly-bridged simultaneously by corresponding pyridyl ligands, while the adjacent [Cd 3 (CO 2 ) 6 ] units in 4 are singly-bridged simultaneously by corresponding pyridyl ligands. The luminescence sensing investigation indicates that compound 1 exhibits extremely sensitive and selective detection of Cu 2+ with a detection limit of 0.363 μM, and compounds 2–4 show extremely sensitive and selective detection of Fe 3+ with detection limits of 0.539 μM, 0.265 μM, and 0.748 μM, respectively. Competitive experiments in the presence of interfering cations with 1–4 revealed no major change in the quenching efficiency.
Type of Medium:
Online Resource
ISSN:
1466-8033
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2025075-7
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