Lihlahisoa

Letoto la li-bimetallic complexes tsa ruthenium(II) tse kentsoeng ke li-heterocyclic ligands tse entsoeng ke condensation ea 4,5-diazafluoren-9-one e nang le diamine tse sa tšoaneng, hydrazine, 1,4-phenylenediamine, benzidine, le 4,4'-methylenedianiline, ho fella ka litsi tsa tšepe tse arohaneng ka libaka tse fapaneng.Mehaho ena e hlahisa ho fetisoa ha tšepe ho isa ho ligand sebakeng sa 450 nm sa spectrum e bonahalang le intraligand pi --> pi ho fetoha sebakeng sa 300 nm sa mahlaseli a ultraviolet.Litsi tsa ruthenium(II) li na le oxidized ka mekhoa e 'meli e haufi-ufi ea elektronike e le' ngoe ka menyetla e ntle ho feta ea Ru(bpy) (3) (2+).Li-bridging ligands li fokotsehile ka mekhoa e 'meli e haufi ea elektronike e le' ngoe ka menyetla e metle ho feta ea ho fokotsa li-bipyridine ligands (hoo e ka bang -1.30 V), leha diazafluorene = NN = diazafluorene bridging ligand e fokotsehile ka mokhoa o fetohang ho tse peli tsa elektronike e le 'ngoe. mehato ea E(1/2) boleng ba -0.29 le -0.52 V. Ka mor'a ho hloekisoa ka ho hlahisa li-complexes tse hloekileng holim'a kholomo ea gel ea silica e nang le mefuta e sa tšoaneng ea 0.10 M NH(4)PF(6) ka methanol, ho tsoa ho etsahala feela ka matrix a khalase ho 77 K le mocheso o tlase ka tharollo.Nako ea bophelo ba ho tsoa ho 77 K ho 4:1 ethanol: khalase ea methanol ke 5 +/- 1 &mgr;s.Boithuto ba bophelo bohle ba mocheso o feto-fetohang bo senola boteng ba boemo bo tlase bo nang le DeltaE = hoo e ka bang 1500 cm(-) (1), 'me ho feta ho mocheso oa kamore ho bontša hore nako ea bophelo ea tlhahiso e maemong a subnanosecond.