SYNTHESIS AND INTRAMOLECULAR CHARGE SEPARATION OF FIXED-DISTANCE TRIADS CONSISTING OF ZINC PORPHYRIN, METAL-FREE PORPHYRIN, AND ELECTRON-ACCEPTING DIIMIDE MOIETY

被引：41

作者：

OSUKA, A ^{[1
]}

ZHANG, RP ^{[1
]}

MARUYAMA, K ^{[1
]}

OHNO, T ^{[1
]}

NOZAKI, K ^{[1
]}

机构：

[1] OSAKA UNIV, COLL GEN EDUC, DEPT CHEM, TOYONAKA, OSAKA 560, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1993年 / 66卷 / 12期

关键词：

D O I：

10.1246/bcsj.66.3773

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Synthesis of fixed-distance triads consisting of zinc porphyrin (ZnP), metal-free porphyrin (H2P), and pyromellitimide (PIm) or 1,4:5,8-naphthalenetetracarboximide (NIm) is described. The ZnP and H2P moieties are bridged by aromatic spacers such as 1,4-phenylene, 4,4'-biphenylylene, methylenebis(1,4-phenylene), and bicyclo[2.2.2]octane-1,4-diylbis(1,4-phenylene) groups. The steady-state fluorescence spectra indicated the occurrence of intramolecular singlet-singlet energy transfer form the ZnP to the H2P. Formation of long-lived charge-separated states (ZnP)+-H2P-(PIM)- and (ZnP)+-H2P-(NIm)- with lifetimes of 0.14-80 mus in THF was observed by nanosecond to microsecond transient absorption spectroscopy. The lifetimes of the (ZnP)+-H2P-(Im)- states depend on the distances between the charged sites as well as the energy gaps between the ion pair and the ground state.

引用

页码：3773 / 3782

页数：10

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