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Recent Findings in Porphyrins Described by Researchers from University of Hong Kong

June 24, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Biological Factors. According to news originating from Hong Kong, People's Republic of China, by NewsRx correspondents, research stated, "A new class of molecular dyads comprising metalloporphyrin-linked alkynylplatinum(II) polypyridine complexes with carboxylic acids as anchoring groups has been designed and synthesized. These complexes can sensitize nanocrystalline TiO2 in dye-sensitized solar cell (DSSC) studies."

Our news journalists obtained a quote from the research from the University of Hong Kong, "The photophysical, electrochemical, and luminescence properties of the complexes were studied and their excited-state properties were investigated by nanosecond transient absorption spectroscopy, with the charge-separated [Por(.-){(CC)Pt(tBu(3)tpy)}(.+)] state observed upon excitation. Excited-state redox potentials were determined; the electrochemical data supports the capability of the complexes to inject an electron into the conduction band of TiO2. The complexes sensitize nanocrystalline TiO2 and exhibited photovoltaic properties, as characterized by current-voltage measurements under illumination of air mass 1.5G sunlight (100mWcm(-2))."

According to the news editors, the research concluded: "A DSSC based on one of the complexes showed a short-circuit photocurrent of 10.1mAcm(-2), an open-circuit voltage of 0.64V, and a fill factor of 0.52, giving an overall power conversion efficiency of 3.4%."

For more information on this research see: Molecular Dyads Comprising Metalloporphyrin and Alkynylplatinum(II) Polypyridine Terminal Groups for Use as a Sensitizer in Dye-Sensitized Solar Cells. Chemistry-A European Journal, 2014;20(11):3142-3153. Chemistry-A European Journal can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany (see also Biological Factors).

The news correspondents report that additional information may be obtained from E.C.H. Kwok, University of Hong Kong, Dept. of Chem, Hong Kong, Hong Kong, People's Republic of China. Additional authors for this research include M.Y. Chan, K.M.C. Wong and V.W.W. Yam.

Keywords for this news article include: Asia, Hong Kong, Chemistry, Nanotechnology, Electrochemical, Nanocrystalline, Metalloporphyrins, Biological Factors, Emerging Technologies, People's Republic of China

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Source: Life Science Weekly