English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Cr3+ in AlPO4-5: Single crystal u.v.-vis spectroscopy of as-synthesized and modified crystals

MPS-Authors
/persons/resource/persons58799

Marlow,  F.
Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Thiele, S., Hoffmann, K., Vetter, R., Marlow, F., & Radaev, S. (1997). Cr3+ in AlPO4-5: Single crystal u.v.-vis spectroscopy of as-synthesized and modified crystals. Zeolites, 19(2-3), 190-196. doi:10.1016/S0144-2449(97)00069-9.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-2729-4
Abstract
Large Cr:AlPO4-5 single crystals have been characterized by microcrystal absorption spectros copy using a CCD array spectrometer and a fiber optics technique. For Cr3+ in AlPO4-5 crystals a polarization-dependent absorption is observed. This indicates an anisotropic coordination of Cr3+ distorted by the molecular sieve structure. Polarized absorption measurements on Cr: AlPO4-5 crystals loaded with p-nitrodimethyl aniline (pNDMA) and with p-nitroaniline (pNA) show a strong alignment of the guest molecules in the pore system parallel to the straight channels. The reduced ability to adsorb large molecules into the channels of the Cr:AlPO4-5 crystals supports the hypothesis of the nonframework incorporation of Cr3+.