𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Picosecond excited-state dynamics of fixed-distance triads consisting of metalloporphyrin, doubly strapped metal-free porphyrin, and pyromellitimide

✍ Scribed by Atsuhiro Osuka; Shinji Marumo; Kazuhiro Maruyama; Noboru Mataga; Masaya Ohkochi; Seiji Taniguchi; Tadashi Okada; Iwao Yamazaki; Yoshinobu Nishimura

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
513 KB
Volume
225
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Upon photoexcitation of fixed-distance triads consisting of zinc-porphyrin (ZnP) or magnesium-porphyrin (MgP), a doubly strapped metal-free porphyrin (SH,P), and pyromellitimide (PIm), (ZnP) +-SH2P-(PIm)-and (MgP)+-SH2P-(PIm)-ion pair states are produced in high yields by two-step electron-transfer reactions: ( 1) charge separation between ' (SH,P)* and PIm and ( 2 ) hole transfer from ( SH2P) + to the metalloporphyrin. A (MgP ) +-SH2P-(PIm ) -ion pair state is fairly long-lived, while a (ZnP ) +-SH2P-(PIm ) -state is only short-lived due to a decay pathway to the ground state through a reverse hole transfer to give ZnP-(SH2P)+-( PIm)-followed by charge recombination.

📜 SIMILAR VOLUMES

Long-lived charge separated states from
Long-lived charge separated states from distance fixed triads consisting of zinc porphyrin, free-base porphyrin, and pyromellitimide
✍ Atsuhiro Osuka; Toshi Nagata; Fumikazu Kobayashi; Run Ping Zhang; Kazuhiro Maruy 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 614 KB

Photwxcitation of distance restricted triads consisting of zinc porphyrin (ZnP), free-base porphyrin (HP), and pyromellitimide (Im) at 532 urn in THF at room temperature led to long-lived charge separated states (ZnP)+-H2P-(Im)-with a lifetime of 0.16-80 ps via electron transfer from the ' (H2P)\* t

Orientation effects on excited state dyn
Orientation effects on excited state dynamics of zinc porphyrin–free base porphyrin–pyromellitimide triads
✍ Atsuhiro Osuka; Ji-Young Shin; Ryusho Yoneshima; Hideo Shiratori; Takeshi Ohno; 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB

The synthesis is described of fixed distance triads consisting of zinc porphyrin (ZP), metal-free porphyrin (HP) and pyromellitimide (I) in which the ZP and HP moieties are bridged by a rigid 4,4'biphenylene spacer and related spacers, being held with dihedral angles defined by the torsional angle (