Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/4929
Título: Copper-organic frameworks assembled from in situ generated 5-(4-pyridyl) tetrazole building blocks: synthesis, structural features, topological analysis and catalytic oxidation of alcohols
Autor: Nasani, Rajendar
Saha, Manideepa
Mobin, Shaikh
Martins, Luísa Margarida D. R. S.
Pombeiro, Armando J. L.
Kirillov, Alexander M.
Mukhopadhyay, Suman
Palavras-chave: Tert-butyl hydroperoxide
Cadmium Coordination Polymer
Aerobic oxidation
Benzylic alcohols
Substituted tetrazoles
Dipolar cycloaddiction
Microwave synthesis
Selective oxidation
Data: 2014
Editora: Royal Society of Chemistry
Citação: NASANI, Rajendar; [et al] – Copper-Organic frameworks assembled from in situ generated 5-(4-Pyridyl) tetrazole building blocks: synthesis, structural features, topological analysis and catalytic oxidation of alcohols. Dalton Transactions. ISSN: 1477-9226. Vol. 43, N.º 26 (2014) pp. 9944-9954
Relatório da Série N.º: 26
Resumo: Two new metal- organic compounds {[Cu-3(mu(3)-4-(p)tz)(4)(mu(2)-N-3)(2)(DMF)(2)](DMF)(2)}(n) (1) and {[Cu(4ptz) (2)(H2O)(2)]}(n) (2) {4-ptz = 5-(4-pyridyl)tetrazolate} with 3D and 2D coordination networks, respectively, have been synthesized while studying the effect of reaction conditions on the coordination modes of 4-pytz by employing the [2 + 3] cycloaddition as a tool for generating in situ the 5-substituted tetrazole ligands from 4-pyridinecarbonitrile and NaN3 in the presence of a copper(II) salt. The obtained compounds have been structurally characterized and the topological analysis of 1 discloses a topologically unique trinodal 3,5,6-connected 3D network which, upon further simplification, results in a uninodal 8-connected underlying net with the bcu (body centred cubic) topology driven by the [Cu-3(mu(2)-N-3)(2)] cluster nodes and mu(3)-4-ptz linkers. In contrast, the 2D metal-organic network in 2 has been classified as a uninodal 4-connected underlying net with the sql [Shubnikov tetragonal plane net] topology assembled from the Cu nodes and mu(2)-4-ptz linkers. The catalytic investigations disclosed that 1 and 2 act as active catalyst precursors towards the microwave-assisted homogeneous oxidation of secondary alcohols (1-phenylethanol, cyclohexanol, 2-hexanol, 3-hexanol, 2-octanol and 3-octanol) with tert-butylhydroperoxide, leading to the yields of the corresponding ketones up to 86% (TOF = 430 h(-1)) and 58% (TOF = 290 h(-1)) in the oxidation of 1-phenylethanol and cyclohexanol, respectively, after 1 h under low power ( 10 W) microwave irradiation, and in the absence of any added solvent or additive.
Peer review: yes
URI: http://hdl.handle.net/10400.21/4929
DOI: 10.1039/c4dt00531g
ISSN: 1477-9226
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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