Characterization of highly luminescent europium complexes inside zeolites

Article Abstract:

Four organometallic complexes of Eu3+ have been synthesized in Y, mordenite and ZSM-5 zeolites by adsorbing the ligand into the Eu3+-doped zeolites. These compounds will be used in studying how their luminescence is affected by the Eu3+ content, the nature of the ligand and the zeolite crystalline structure. Results show that the complexes exhibit longer lived emissions even when the highest ligand:metal stoichiometry cannot be achieved. The emission is 10-fold longer than those for complexes in solution.

Organometallic compounds, Photoluminescence, Complex compounds, Coordination compounds

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Acid-base properties of coumarin 6. Characterization in solution, the solid state, and incorporated into supramolecular systems

Article Abstract:

A study was conducted to analyze the spectroscopic characteristics of the dye coumarin 6 in solution. The Hammatsu C-4334 streakscope was utilized to perform time-resolved fluorescence measurements. The Bruker AMX 500 was then used to determine the 1H nuclear magnetic resonance spectra of the free base and the hydrochloride salt. Results indicated that the the sensitivity of coumarin 6 to its microenvironment makes it a viable candidate for analyzing other heterogeneous systems.

Usage, Fluorescence, Spectrum analysis, Spectroscopy, Coumarins

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Intrazeolite photochemistry. Photochemistry of 1-azaxanthone in zeolites in the presence of hydrogen donors, electron donors, and energy acceptors

Article Abstract:

Research has been conducted on the photochemistry and photophysics of 1-azaxanthone that is included in faujasite zeolites. Reactivity of the prepared benzophenone inclusion complexes in NaY has been compared to that of 1-azaxanthone inclusion complexes.

Canada, Spain, Hydrogen, Benzophenone

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