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Issue 32, 2009
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Natural abundance 13C and 15N solid-state NMR analysis of paramagnetic transition-metal cyanide coordination polymers

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Abstract

The 13C and 15N MAS NMR spectra of a series of well-characterized paramagnetic metal cyanide coordination polymers are acquired at natural abundance, without the need for polarization transfer methods such as cross-polarization or INEPT. For systems where the paramagnetic centre is outside of the cyanide framework, well-resolved 13C and 15N spectra of cyanide ligands are obtained. Chemical shifts deviate from typical diamagnetic cyanide ranges and depend only partly on the cyanide coordination type, being dominated by their proximity to the paramagnetic center. A combination of the observed isotropic chemical shifts, their temperature dependence, and transverse relaxation time constants (T2) provides valuable local structural information and lays the foundation for the structural elucidation of unknown paramagnetic metal–cyanide coordination polymers. Toward this end, we apply these solid-state NMR techniques to a pair of compounds without a priori knowledge of the structures.

Graphical abstract: Natural abundance 13C and 15N solid-state NMR analysis of paramagnetic transition-metal cyanide coordination polymers

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Publication details

The article was received on 17 Apr 2009, accepted on 29 Jun 2009 and first published on 21 Jul 2009


Article type: Paper
DOI: 10.1039/B907747B
Citation: Phys. Chem. Chem. Phys., 2009,11, 6925-6934
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    Natural abundance 13C and 15N solid-state NMR analysis of paramagnetic transition-metal cyanide coordination polymers

    P. M. Aguiar, M. J. Katz, D. B. Leznoff and S. Kroeker, Phys. Chem. Chem. Phys., 2009, 11, 6925
    DOI: 10.1039/B907747B

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