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Electron paramagnetic resonance study of partially oriented clay platelets intercalated with copper(II) 1,4,8,11-tetraazacyclotetradecane
- Title
- Electron paramagnetic resonance study of partially oriented clay platelets intercalated with copper(II) 1,4,8,11-tetraazacyclotetradecane
- Authors
- So H.; Jung H.; Choy J.-H.; Belford R.L.
- Ewha Authors
- 최진호
- SCOPUS Author ID
- 최진호
- Issue Date
- 2005
- Journal Title
- Journal of Physical Chemistry B
- ISSN
- 1520-6106
- Citation
- Journal of Physical Chemistry B vol. 109, no. 8, pp. 3324 - 3329
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Electron paramagnetic resonance (EPR) spectra of powder and oriented films of montmorillonite, hectorite, and saponite intercalated with [Cu(cyclam)] 2+ (cyclam = 1,4,8,11-tetraazacyclotetradecane) exhibit three components: an orientation-dependent component without hyperfine features, an orientation-dependent component with hyperfine features, and an orientation-independent component without hyperfine feature. EPR spectra of [Cu(cyclam)] 2+-saponite, which exhibit only two components and the best resolved hyperfine features, were simulated. The spectra indicate that a large portion of the saponite platelets are inclined to the glass surface, although they tend to align with their basal planes parallel to the glass surface. The orientation-dependent spectra could be simulated by introducing a Gaussian distribution with a standard deviation of 20° for the inclination angle. The standard deviation may be used as a disorder parameter for the microcrystals assembled on glass plates. Spectral simulation also shows that the CuN 4 plane of [Cu(cyclam)] 2+ is parallel to the clay layers. EPR spectra of some other partially oriented systems are also discussed. © 2005 American Chemical Society.
- DOI
- 10.1021/jp0454826
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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