View : 10 Download: 0

Synthesis and photodynamics of fluorescent blue bodipy-porphyrin tweezers linked by triazole rings

Title
Synthesis and photodynamics of fluorescent blue bodipy-porphyrin tweezers linked by triazole rings
Authors
Eggenspiller A.Takai A.El-Khouly M.E.Ohkubo K.Gros C.P.Bernhard C.Goze C.Denat F.Barbe J.-M.Fukuzumi S.
Ewha Authors
Shunichi Fukuzumi
SCOPUS Author ID
Shunichi Fukuzumiscopus
Issue Date
2012
Journal Title
Journal of Physical Chemistry A
ISSN
1089-5639JCR Link
Citation
vol. 116, no. 15, pp. 3889 - 3898
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Novel zinc porphyrin tweezers in which two zinc porphyrins were connected with π-conjugated boron dipyrromethenes (BDP meso-Por 2 and BDP β-Por 2) through triazole rings were synthesized to investigate the photoinduced energy transfer and electron transfer. The UV-vis spectrum of BDP β-Por 2 which has less bulky substituents than BDP meso-Por 2 exhibits splitting of the Soret band as a result of the interaction between porphyrins of BDP β-Por 2 in the excited state. Such interaction between porphyrins of both BDP β-Por 2 and BDP meso-Por 2 is dominant at room temperature, while the coordination of the nitrogen atoms of the triazole rings to the zinc ions of the porphyrins occurs at low temperature. The conformational change of the BDP-porphyrin composites was confirmed by the changes in UV-vis and fluorescence spectra depending on temperature. Photodynamics of BDP meso-Por 2 and BDP β-Por 2 has also been investigated by laser flash photolysis. Efficient singlet-singlet energy transfer from the ZnP to the π-conjugated BDP moiety of both BDP meso-Por 2 and BDP β-Por 2 occurred in opposite direction as compared to energy transfer from conventional BDP to ZnP due to the π-conjugation in nonpolar toluene. In polar benzonitrile, however, additional electron transfer occurred along with energy transfer. © 2012 American Chemical Society.
DOI
10.1021/jp300415a
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE