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Titolo:
SYNTHESIS AND SPECTROELECTROCHEMICAL CHARACTERIZATION OF BINUCLEAR COMPLEXES OF BIS(BIPYRIDINE) RUTHENIUM AND PENTAAMMINERUTHENIUM BRIDGED WITH ALPHA,OMEGA-DIPYRIDYLCYANINES
Autore:
TOLBERT LM; ZHAO XD; DING YZ; BOTTOMLEY LA;
Indirizzi:
GEORGIA INST TECHNOL,SCH CHEM & BIOCHEM ATLANTA GA 30332 GEORGIA INST TECHNOL,SCH CHEM & BIOCHEM ATLANTA GA 30332
Titolo Testata:
Inorganica Chimica Acta
fascicolo: 1-2, volume: 251, anno: 1996,
pagine: 29 - 33
SICI:
0020-1693(1996)251:1-2<29:SASCOB>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL ELECTRON-TRANSFER; MIXED-VALENCE MOLECULES; SOLITON MODEL COMPOUNDS; CHEMISTRY; POLYENES; LIGAND;
Keywords:
SPECTROELECTROCHEMISTRY; MOLECULAR WIRES; RUTHENIUM COMPLEXES; POLYENE COMPLEXES; AMMINE COMPLEXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
L.M. Tolbert et al., "SYNTHESIS AND SPECTROELECTROCHEMICAL CHARACTERIZATION OF BINUCLEAR COMPLEXES OF BIS(BIPYRIDINE) RUTHENIUM AND PENTAAMMINERUTHENIUM BRIDGED WITH ALPHA,OMEGA-DIPYRIDYLCYANINES", Inorganica Chimica Acta, 251(1-2), 1996, pp. 29-33

Abstract

As part of our systematic investigation of solitonic behavior in molecules and search for structural and dimensional requirements for molecular level electronic components, we have prepared two binuclear compounds which incorporate a pyridocyanine bridging segment between two ruthenium complexes. [(NH3)(5)Ru(LH)Ru(NH3)(5)](PF6)(4) and [(bipy)(2)ClRu(LH)RuCl(bipy)(2)](PF6)(2) (where LH is 1,5-dipyridyl-1,3-pentadiene) and the mononuclear complexes [(NH3)(5)Ru(LH)](PF6)(2) and [Ru(bipy)(2)(LH)Cl](PF6) were synthesized by ligand substitution from the convenient precursors Ru(bipy)(2)Cl-2 and [Ru(NH3)(5)Cl]Cl-2. Deprotonationof the dimeric complexes M-LH-M afforded cyanine-linked complexes M-L-M. Attempts to prepare mixed-valence polyenyl complexes electrooxidatively were unsuccessful. A spectroelectrochemical investigation revealed that oxidation of the deprotonated polyenyl bridging moiety occurred at a lower potential than that required for oxidation of the terminicenters in the deprotonated complex [(bipy)(2)ClRu(L)RuCl(bipy)(2)](PF6)(2). Similarly, the expected intervalence transfer between the polyene terminal groups in deprotonated [(NH3)(5)Ru(L)Ru(NH3)(5)](PF6)(4) was not realized due to ligand dissociation.

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Documento generato il 22/01/20 alle ore 21:49:11