RESONANCE RAMAN-SPECTROSCOPY OF RUTHENIUM(II) AND OSMIUM(II) POLYPYRIDYL COMPLEXES CONTAINING THE N-METHYL-4,4'-BIPYRIDINIUM RADICAL (MQ(CENTER-DOT)) AS A LIGAND - EVIDENCE FOR A M(D-PI)-]MQ(CENTER-DOT)(PI-ASTERISK) METAL-TO-LIGAND CHARGE-TRANSFER (MLCT) TRANSITION

被引：12

作者：

BATES, WD

CHEN, PY

BIGNOZZI, CA

SCHOONOVER, JR

MEYER, TJ

机构：

[1] LOS ALAMOS NATL LAB,BIOSCI & BIOTECHNOL GRP,LOS ALAMOS,NM 87544

[2] UNIV FERRARA,CNR,CTR FOTOREATT & CATALISI,DIPARTIMENTO CHIM,I-44100 FERRARA,ITALY

[3] UNIV N CAROLINA,DEPT CHEM,CHAPEL HILL,NC 27599

来源：

INORGANIC CHEMISTRY | 1995年 / 34卷 / 24期

关键词：

D O I：

10.1021/ic00128a039

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Free N-methyl-4,4'-bipyridinium radical (MQ(.)) displays broad, visible absorptions at 360 and 600 nm that can be assigned to pi --> pi* and pi* --> pi* (MQ(.)) transitions. Excitation-dependent resonance Raman measurements on MQ(.), [(bpy)(2)Ru(MQ(.))(2)](2+), and [(bpy)(2)Os(CO)(MQ(.))](2+) indicate that new absorption bands in the complexes are MQ(.)-based and causes significant resonance enhancements for modes affected by a change in the oxidation state at the metal. The new band is assigned to a MII --> (d pi) -->MQ(.)(pi*) metal-to-ligand charge transfer (MLCT) transition.

引用

页码：6215 / &

共 21 条

[1] CHARACTERIZATION OF METAL-TO-LIGAND CHARGE-TRANSFER AND INTRALIGAND TRANSITIONS OF FAC-[RE(CO)3L(X)] COMPLEXES [L=DI-IMINE - X=HALIDE OR MN(CO)5] AND EXPLANATION OF THE PHOTOCHEMISTRY OF [RE(CO)3L-[MN(CO)5]] USING THE RESONANCE RAMAN EFFECT [J].