A new application about Europium(III) trifluoromethanesulfonate

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Sol-gel derived Eu3+-doped materials based on a poly(oxyethylene)/siloxane hybrid host incorporating two coordinating functionalities (polymer ether- and cross-link carbonyl-type oxygen atoms) have been investigated by mid-infrared and Raman spectroscopies with the goal of elucidating the cation/polymer and cation/cross-link interactions and hydrogen bonding. The organic/inorganic matrix of these ormosils is composed of a siliceous backbone bonded through urethane groups to methyl end-capped polyether chains with approximately seven oxyethylene repeat units. This framework, called mono-urethanesil, has been doped with europium triflate, Eu(CF3SO3)3. Xerogels with salt composition n (where n is the molar ratio of OCH2CH2 moieties per Eu3+ion) ranging from ? to 5 have been analyzed. The results obtained indicate that in the mono-urethanesils with n ? 60 the Eu3+ ions coordinate solely to the urethane carbonyl oxygen atoms. The first evidences of the complexation of the polyether chains to the cations have been found at a salt concentration that corresponds to n = 40, that is considerably lower than the saturation level the carbonyl groups has attained (in theory at n = 7). At a higher salt content (n < 40), both types ofcation coordination are apparent. Because enzymes can increase reaction rates by enormous factors and tend to be very specific, SDS of cas: 52093-25-1, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 52093-25-1

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI