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New Findings from Rhodes University in the Area of Nanoparticles Reported (Photophysical behavior of Zn aminophenoxy substituted phthalocyanine...

August 1, 2014



New Findings from Rhodes University in the Area of Nanoparticles Reported (Photophysical behavior of Zn aminophenoxy substituted phthalocyanine conjugates with carboxylic acid-coated silica nanoparticles: Effect of point of substitution)

By a News Reporter-Staff News Editor at Science Letter -- A new study on Nanoparticles is now available. According to news reporting originating in Grahamstown, South Africa, by NewsRx journalists, research stated, "This work reports on the grafting of silica nanoparticles with zinc phthalocyanine complexes tetra-substituted non-peripherally and peripherally with a 4-amino phenoxy group. The phthalocyanine dyes have free amino groups, facilitating covalent attachment of the dyes on the silica surface via amide bond formation."

The news reporters obtained a quote from the research from Rhodes University, "The surface area of the functionalized silica nanoparticles increased on conjugation but the pore volumes were reduced. The phthalocyanine functionalized silica nanoparticles showed lower fluorescence quantum yields as well as shorter triplet lifetimes compared to the free phthalocyanines in dimethyl formamide."

According to the news reporters, the research concluded: "For the non-peripherally substituted phthalocyanines increases in triplet yield quantum yields, lifetimes, and singlet oxygen quantum yields were observed."

For more information on this research see: Photophysical behavior of Zn aminophenoxy substituted phthalocyanine conjugates with carboxylic acid-coated silica nanoparticles: Effect of point of substitution. Journal of Molecular Structure, 2014;1068():245-254. Journal of Molecular Structure can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Molecular Structure - www.elsevier.com/wps/product/cws_home/500850)

Our news correspondents report that additional information may be obtained by contacting A. Fashina, Rhodes University, Dept. of Chem, ZA-6140 Grahamstown, South Africa. Additional authors for this research include E. Antunes and T. Nyokong (see also Nanoparticles).

Keywords for this news article include: Grahamstown, South Africa, Africa, Emerging Technologies, Nanoparticle, Nanoparticles, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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