Structure dependence of intramolecular electron transfer reactions of simple dyads of a zinc(ii) porphyrin complex bearing a peripheral bipyridine moiety.

Content Provider	Semantic Scholar
Author	Sakakibara, Kei Nagino, Shou Akanuma, Hajime Tsukada, Yuki Nakano, Hirofumi Yagyu, Takeyoshi Takagi, Hideo D. Inamo, Masahiko
Copyright Year	2017
Abstract	New dyad systems based on a zinc(ii) porphyrin complex and a 2,2'-bipyridine moiety linked by amide bridges having various bridging groups were synthesized. The photochemical behavior was investigated using fluorescence spectroscopy and a time-resolved absorption technique. The singlet excited state of the porphyrin complex was found to be partially quenched by Cu2+ in methanol, and a photoinduced electron transfer from the excited state of the porphyrin moiety to the Cu(ii)-bipyridine moiety was observed using a transient absorption technique. The relatively long lifetime of the charge-separated state was ascribed to the slow electron-transfer reaction of the Cu(ii)/Cu(i) couple bound to the bipyridine moiety. The lifetime of the charge-separated state of dyads becomes longer with the increase of the distance between the porphyrin and bipyridine moieties, and these findings are discussed using an empirical formula for the relationship between the reactivity and molecular structure of dyads.
Starting Page	12645
Ending Page	12654
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1039/c7dt02674a
PubMed reference number	28914303
Journal	Medline
Volume Number	46
Issue Number	37
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/dt/c7dt02674a/c7dt02674a1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/c7dt02674a
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article