OPTICAL CHARACTERIZATION OF ORGANIZED ADSORBATES IN ZEOLITE MICROCRYSTALS - POLARIZED ABSORPTION-SPECTROSCOPY

Chromophores are incorporated in a highly ordered manner in molecular sieve crystals. The resulting geometric arrangement is determined by t he pore structure. Microfocus u.v.-vis spectroscopy on individual zeol ite microcrystals is used for the investigation of the electronic stat es of the incorporated compounds. The polarization-dependent measureme nts on single crystals allow the determination of the alignment of zeo lite-hosted guest molecules. The new method can be used to determine t he guest concentration in the microcrystal at very low loading via the Lambert-Beer law.