par Servaty, Kathleen 
;Moucheron, Cécile ;Kirsch-De Mesmaeker, Andrée
Référence Dalton transactions, 40, 44, page (11704-11711)
Publication Publié, 2011
;Moucheron, Cécile ;Kirsch-De Mesmaeker, Andrée Référence Dalton transactions, 40, 44, page (11704-11711)
Publication Publié, 2011
Article révisé par les pairs
| Résumé : | Novel polynuclear compounds, the trinuclear precursor complex cis-{[(phen) 2Ru(PHEHAT)] 2Ru(CH 3CN) 2} 6+4 and the trinuclear TPAC (tetrapyrido[3,2-a:2′, 3′-c:3′′,2′-h:2′′′, 3′′′-j]acridine) complex {[(phen) 2Ru(PHEHAT)] 2Ru(TPAC)} 6+5 have been prepared. Their electrochemistry and photophysics indicate that the 3MLCT (metal to ligand charge transfer) emissions involve the external {Ru(PHEHAT)} moieties for both complexes and there is no spectro-electrochemical correlation. The trinuclear dendron with the TPAC ligand represents a key compound for future constructions of much larger species thanks to the TPAC that could bridge another polynuclear precursor. For decreasing the length of preparation of these compounds, microwave assisted syntheses have been tested and used not only for the targeted complexes but also for the precursors ((phen) 2RuCl 2, {(phen) 2Ru(phendione)} 2+, {(phen) 2Ru(PHEHAT)} 2+ (PHEHAT = 1,10-phenanthrolino[5,6-b]1,4,5,8,9,12- hexaazatriphenylene), (DMSO) 4RuCl 2), and for the bridging TPAC ligand itself. The microwave method allows a drastic decrease of the preparation times, especially in the case of the TPAC, from 8 days to 60 min. This journal is © The Royal Society of Chemistry 2011. |
