RE-Organo Cation POM Supermolecule Complexes

The photoexcitation into the oxygen-to-metal (O M) ligand-to-metal charge transfer (LMCT) bands of polyoxometaloeuropates leads to an intramolecular energy transfer from 

Akins et al. successfully immobilized polyoxometaloeuropates [(Eu2PWio038)4(W30s (H20)2(0H)4)] inside the channels of MCM-41 mesoporous molecular sieve material by means of the incipient wetness method. For proper host-guest interactions, amine groups were introduced into the system as a result of an aminosilylation procedure. The photoluminescent behavior of the composite at room temperature indicates a characteristic trivalent europium emission pattern corresponding to Dq transitions. Such a composite might represent a new material with potential applications as a photoluminescent device or phosphor [85]. 

Specimen. The photophysical behavior (fluorescence spectra, fluorescence lifetimes, fluorescence quantum yield) of the complexes differs widely in solid powders, films, and solutions. The cationic surfactants not only play a structural role but also have a strong influence on the photophysical properties of Ki3[Eu(SiW9M02O39)2] [86]. 

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