Issue 9, 2006
From the journal:

Dalton Transactions

Novel charge transfer supramolecular assemblies with Keggin anions and 2-amino-5-nitropyridine†

J. A. F. Gamelas,a   F. M. Santos,a   V. Felix,a   A. M. V. Cavaleiro,*a   E. de Matos Gomes,b   M. Belsleyb  and  M. G. B. Drewc  

* Corresponding authors

a Department of Chemistry, Universidade de Aveiro, 3810-193 Aveiro, Portugal
E-mail: ana@dq.ua.pt
Fax: +351 234 370084
Tel: +351 234 370200 or +351 234 370734

b Department of Physics, Universidade do Minho, 4710-057 Braga, Portugal

c School of Chemistry, University of Reading, Reading, UK

Abstract

Several novel compounds with the non-linear optical chromophore 2-amino-5-nitropyridine (2A5NP) and Keggin polyoxoanions (α-isomers), having the general formula (2A5NP)mHn[XM12O40]·xH2O, M = Mo, W, were synthesised. Compounds were obtained with X = P, n = 3, m = 3 and 4 and X = Si, n = m = 4 (x = 2–6). Thus, for each of the anions [PMo12O40]3− and [PW12O40]3− two different compounds were obtained, with the same anion and organic counterpart but with a different stoichiometric ratio. These presented different charge transfer properties and thermal stability. All compounds were characterised by spectroscopic and analytical techniques. The single crystal X-ray diffraction structure of (2A5NP)4H3[PMo12O40]·2.5H2O·0.5C2H5OH showed that the water solvent molecules and the organic chromophores are assembled via infinite one-dimensional chains of hydrogen bonds with formation of open channels, which accommodate [PMo12O40]3− and ethanol solvent molecules.

Graphical abstract: Novel charge transfer supramolecular assemblies with Keggin anions and 2-amino-5-nitropyridine

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Article information

DOI
https://doi.org/10.1039/B508986G
Article type
Paper
Submitted
24 Jun 2005
Accepted
27 Oct 2005
First published
16 Nov 2005

Dalton Trans., 2006, 1197-1203

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Novel charge transfer supramolecular assemblies with Keggin anions and 2-amino-5-nitropyridine

J. A. F. Gamelas, F. M. Santos, V. Felix, A. M. V. Cavaleiro, E. de Matos Gomes, M. Belsley and M. G. B. Drew, Dalton Trans., 2006, 1197 DOI: 10.1039/B508986G

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