Synthesis and characterization of novel Ru(II)-diimine complexes for combination of layered double hydroxides

Srankó, Dávid Ferenc and Szülek, Daniella and Kerner, Zsolt Gábor and Pap, József Sándor (2014) Synthesis and characterization of novel Ru(II)-diimine complexes for combination of layered double hydroxides. In: 12th Pannonian Symposium on Catalysis, September 16-20, 2014, Trest, Czech Republic.

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Abstract

Conversion of solar energy into chemical energy by using stable and efficient photosynthetic devices is a key and timely challenge. Molecular hydrogen, as a promising substitute for fossil fuels, makes the water splitting a prominently important catalytic process. In the past decades the number of studies on the photochemistry of diimine-type Ru(II) complexes has extremely increased. These compounds can be dissolved in a variety of solvents by careful choice of the appropriate counter ion or ligand modifications. They also have a broad and intense metal-to-ligand charge transfer (MLCT) band in the visible region with a tunable maximum typically around 400 and 500 nm. The redox and excited-state properties can be tuned by the alteration of the ligands or ligand substituents. In practice, the bipyridine-type Ru(II) complexes as photosensitizers, can be part of photocatalytic molecular devices. Moreover, using layered double hydroxides (LDHs) as substrate, a novel hybrid photosensitized system can be obtained. Novel Ru-complexes with diimine ligands and their organic-inorganic nanohybrid forms are characterized by UV-visible spectroscopy, spectrofluorometry, secondary ion mass spectrometry (SIMS), fourier transform infrared spectroscopy (FT-IR). For the electroanalytical measurements, a potentiostat and cyclic voltammetry will be used. Acknowledgement This project was supported by the János Bolyai research scholarship of HAS for József S. Pap.

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