Large CoAPO-5 single crystals: Microwave synthesis and anisotropic optical 
absorption

Girnus, Irina; Hoffmann, Katrin; Marlow, Frank; Caro, Jürgen; Döring, Günther

doi:10.1016/0927-6513(93)E0066-P

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Large CoAPO-5 single crystals: Microwave synthesis and anisotropic optical absorption

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Marlow, Frank
Institut für Angewandte Chemie, Rudower Chaussee 5, 12489 Berlin-Adlershof, Germany;
Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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引用

Girnus, I., Hoffmann, K., Marlow, F., Caro, J., & Döring, G. (1994). Large CoAPO-5 single crystals: Microwave synthesis and anisotropic optical absorption. Microporous and Mesoporous Materials, 2(6), 543-555. doi:10.1016/0927-6513(93)E0066-P.

引用: https://hdl.handle.net/11858/00-001M-0000-0024-2449-1

要旨

Large CoAPO-5 crystals were synthesized by microwave heating of a fluoride-containing aluminophosphate gel. By polarization microscopy and polarization-dependent single-crystal ultraviolet—visible (UV—VIS) spectroscopy, the as-synthesized crystals show an optical anisotropy of light absorption. It is proposed that this effect originates from structure-related symmetry distortions of the tetrahedral Co2+ environment in the AFI framework. Consequently, the effect of anisotropic optical absorption can be taken as a proof for the incorporation of cobalt in the AFI framework.