2008年6月
Effect of diffusion on the photoinduced reaction between a tetra-anionic porphyrin and methylviologen cation in methanol
JOURNAL OF PHYSICAL CHEMISTRY A
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- 巻
- 112
- 号
- 24
- 開始ページ
- 5378
- 終了ページ
- 5384
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/jp800538e
- 出版者・発行元
- AMER CHEMICAL SOC
The quenching of the fluorescence decay of electronically excited 5,10,15,20-tetraphenyl-21H,23H-porphinetetrasulfonate (TPPS4-*) in the presence of methylviologen cations (MV2+) was measured at various ionic strengths in methanol. Analysis of the fluorescence decay curves revealed strong evidence for the presence of a second fluorescent species over the entire range of ionic strength used in this work, which is attributed to solvent-separated ion pairs (TPPS4--S-MV2+). Transient effects of the fluorescence decays were analyzed, and values for the effective reaction distance, R-NH, and the diffusion coefficients, D, were obtained. Diffusion coefficients were independently measured for TPPS4- and MV2+ using the Taylor dispersion method. The values for D obtained by the analysis of the transient effect were found to be smaller than those for the sum of the diffusion coefficients of TPPS4- and MV2+ obtained by the Taylor dispersion method and a possible explanation for this result is given.
- リンク情報
-
- DOI
- https://doi.org/10.1021/jp800538e
- CiNii Articles
- http://ci.nii.ac.jp/naid/80019650226
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/18507362
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000256738800009&DestApp=WOS_CPL
- ID情報
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- DOI : 10.1021/jp800538e
- ISSN : 1089-5639
- CiNii Articles ID : 80019650226
- PubMed ID : 18507362
- Web of Science ID : WOS:000256738800009