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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Photophysical study of a covalently linked quantum dot-low symmetry phthalocyanine conjugate
Journal of Photochemistry and Photobiology A: Chemistry, Volume 212, No. 1, Year 2010
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Description
The linkage of a low symmetry phthalocyanine, ZnttbIPc to mercaptopropionic acid (MPA) capped CdTe quantum dots has been achieved using a coupling agent, dicyclohexylcarbodiimide (DCC), to facilitate formation of an amide bond. UV-vis, Raman and IR spectroscopic studies on the linked (QD:ZnttbIPc-linked) conjugate suggest the reaction was a success. Förster resonance energy transfer (FRET) resulted in stimulated emission of ZnttbIPc in both the linked (QD:ZnttbIPc-linked) and mixed (QD:ZnttbIPc-mixed) conjugates. The linked complex (QD:ZnttbIPc-linked) gave the largest FRET efficiency hence showing the advantages of covalent linking. Photophysicochemical properties of the phthalocyanine were improved in the presence of the QDs i.e. for QD:ZnttbIPc-mixed. Fluorescence lifetimes of QDs were unchanged in QD:ZnttbIPc-mixed and decreased for QD:ZnttbIPc-linked. © 2010 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Chidawanyika, Wadzanai J.U.
South Africa, Grahamstown
Rhodes University
Litwinski, Christian
South Africa, Grahamstown
Rhodes University
Antunes, Edith M.
South Africa, Grahamstown
Rhodes University
Nyokong, Tebello
South Africa, Grahamstown
Rhodes University
Statistics
Citations: 37
Authors: 4
Affiliations: 1
Identifiers
Doi:
10.1016/j.jphotochem.2010.03.008
Research Areas
Environmental