Imikhiqizo

Uchungechunge lwe-bimetallic complexes ye-ruthenium(II) eboshwe yi-heterocyclic ligands eyakhiwe yi-condensation ye-4,5-diazafluoren-9-one ene-diamine ehlukahlukene, i-hydrazine, i-1,4-phenylenediamine, i-benzidine, ne-4,4'-methylenedianiline, kubangela izikhungo zensimbi ezihlukaniswe amabanga ahlukahlukene.Amakhompleksi abangela ukumuncwa kwe-metal-to-ligand charge-transfer endaweni engu-450 nm ye-spectrum ebonakalayo kanye ne-intraligand pi --> pi esifundeni esingu-300 nm se-ultraviolet spectrum.Izikhungo ze-ruthenium(II) zifakwe i-oxidized ezinqubweni ezimbili ezisondelene kakhulu ze-electron eyodwa emandleni amahle kakhulu kunaleyo ye-Ru(bpy)(3)(2+).Ama-bridging ligands ancishiswa ngezinqubo ezimbili ezisondelene kakhulu ze-electron eyodwa ezindaweni ezinhle kakhulu kunalezo zokunciphisa ama-bipyridine ligand ahlanganisiwe (cishe -1.30 V), nakuba i-diazafluorene=NN=diazafluorene bridging ligand incishiswa ngokuhlehla ku-electron eyodwa. izinyathelo ku-E(1/2) amanani angu- -0.29 kanye -0.52 V. Ngemva kokuhlanza ngokukhipha izinto ezihlanzekile phezu kwekholomu yejeli ye-silica enokugxilisa okuhlukahlukene okungu-0.10 M NH(4)PF(6) ku-methanol, ukungcola kwenzeka kuphela i-matrix eyingilazi ku-77 K futhi emazingeni okushisa aphansi esisombululo.Izikhathi zokuphila ezikhishwayo ku-77 K ku-4:1 ethanol:ingilazi ye-methanol ngu-5 +/- 1 &mgr;s.Ucwaningo lwempilo yonke yokukhishwa kwezinga lokushisa eliguquguqukayo lwembula ubukhona besimo esiphansi nge-DeltaE = cishe u-1500 cm(-)(1), futhi ukukhishwa kwegumbi lokushisa kubonisa ukuthi isikhathi sokuphila sokukhishwa sikubangeni le-subnanosecond.