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

被引:15
作者
Aguiar, Pedro M. [1 ]
Katz, Michael J. [2 ]
Leznoff, Daniel B. [2 ]
Kroeker, Scott [1 ]
机构
[1] Univ Manitoba, Dept Chem, Winnipeg, MB R3T 2N2, Canada
[2] Simon Fraser Univ, Dept Chem, Burnaby, BC B5A 1S6, Canada
基金
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词
MULTINUCLEAR MAGNETIC-RESONANCE; MAS NMR; COPPER(I) CYANIDE; PB-207; NMR; VIBRATIONAL SPECTROSCOPY; ORGANOMETALLIC COMPLEXES; CRYSTAL-STRUCTURES; CHEMICAL-SHIFT; CHEMISTRY; SPECTRA;
D O I
10.1039/b907747b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The C-13 and N-15 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 C-13 and N-15 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 (T-2) 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.
引用
收藏
页码:6925 / 6934
页数:10
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