期刊
CRYSTAL GROWTH & DESIGN
卷 9, 期 7, 页码 2999-3002出版社
AMER CHEMICAL SOC
DOI: 10.1021/cg900282k
关键词
-
资金
- National Science Foundation [DMR-0720655]
- FIRB
- Cariplo Foundation
- New York University
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0906576] Funding Source: National Science Foundation
Multinuclear H-1-C-13 heterocorrelated (HETCOR) NMR spectroscopy combined with X-ray diffraction revealed the unusual dual properties of identical guest molecules confined in two crystallographically distinct host cavities within single crystals based oil hexagonal frameworks comprising guanidinium ions and organomonosulfonates. The environments of the two cavities differ substantially, as one is lined by the highly polar quasihexagonal guanidinium-sulfonate network, while the other is defined by walls consisting of nonpolar aromatic groups. The effect of these different environments oil the NMR properties of the guest molecules is evident from chemical shift data and two-dimensional HETCOR spectra. The large magnetic susceptibility effect due to ring currents of the aromatic hosts enables determination of the host-guest distances and suggests intermolecular CH center dot center dot center dot pi interactions. The C-13 relaxation times reveal the molecular dynamics of the guests in two nanoscale environments that differ with respect to shape and dimensionality.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据