The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.
Highly Stable Crystalline Catalysts Based on a Microporous Metal−Organic Framework and Polyoxometalates
Abstract
A series of remarkable crystalline compounds [Cu(2)(BTC)(4/3)(H(2)O)(2)](6)[H(n)XM(12)O(40)].(C(4)H(12)N)(2) (X = Si, Ge, P, As; M = W, Mo) were obtained from the simple one-step hydrothermal reaction of copper nitrate, benzentricaboxylate (BTC), and different Keggin polyoxometalates (POMs). In these compounds, the catalytically active Keggin polyanions were alternately arrayed as noncoordinating guests in the cuboctahedral cages of a Cu-BTC-based metal-organic framework (MOF) host matrix. X-ray crystallographic analyses, TG, FT-IR, UV-vis, N(2) adsorption studies, and acid-base titration demonstrated their high stability and toleration for thermal and acid-base conditions. No POM leaching or framework decomposition was observed in our study. The representative acid catalytic performance of a compound containing PW(12) species was assessed through the hydrolysis of esters in excess water, which showed high catalytic activity and can be used repeatedly without activity loss. Moreover, catalytic selectivity, which is dependent on the molecular size of substrates, and substrate accessibility for the pore surface were observed. It is the first time that the well-defined, crystalline, MOF-supported POM compound has behaved as a true heterogeneous acid catalyst. The unique attributes of MOF and well-dispersed level of POMs prohibited the conglomeration and deactivation of POMs, which allowed for the enhancement of their catalytic properties.
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Metadata
- Authors
- Sun, C.-Y., Liu, S.-X., Liang, D.-D., Shao, K.-Z., Ren, Y.-H., & Su, Z.-M.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-01-15
- Volume
- 131
- Issue
- 5
- Pages
- 1883-1888
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1969142803
- Cited by
- 962
- References
- 31
- FWCI
- 37.01
- Type
- journal article
- Language
- en
- Open access
- closed
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