A series of Rh(III) mixed ligand polypyridine type complexes have been prepared. Complexes of the form [Rh(L)2(L0)]nþ, where n ¼ 2=3, L¼2,20-bipyridine (bpy)/1,10-phenanthroline (phen) and L0 ¼3-(pyridin-2-yl)-1,2,4-triazole (Hpytr), 1-methyl-3-(pyridin- 2-yl)-1,2,4-triazole (1M3pytr), 4-methyl-3-(pyridin-2-yl)-1,2,4-triazole (4Mpytr), 3,5-bis(pyridin-2-yl)-1,2,4-triazole (Hbpt), 4-amino- 3,5-bis(pyridin-2-yl)-1,2,4-triazole (NH2bpt) and 3-(pyridin-2-yl)-5-phenyl-1,2,4-triazole (HPhpytr), have been prepared and their synthesis and characterisation are reported. Crystals of [Rh(bpy)2(Phpytr)](PF6)2 and [Rh(phen)2(NHbpt)](PF6)2 were obtained and their structures determined. Analysis of X-ray crystallographic data showed that coordination of the metal centre in [Rh(phen)2(NHbpt)](PF6)2 occurs via the amine moiety and a nitrogen of the pyridine ring. NMR studies illustrated that coordination to the NH2bpt ligand was also possible via a nitrogen of the triazole ring and the pyridine ring forming the complex [Rh(phen)2(NH2bpt)](PF6)3. The absorption and emission properties of the complexes studied were found to be p–p in nature and preliminary evidence suggests that all complexes with the exception of [Rh(phen)2(NHbpt)](PF6)2 and [Rh(bpy)2(NHbpt)](PF6)2 are dual emitting at 77 K.

“The synthesis and characterisation of Rh(III) complexes with pyridyl triazole ligamds”

INDELLI, Maria Teresa;
2004

Abstract

A series of Rh(III) mixed ligand polypyridine type complexes have been prepared. Complexes of the form [Rh(L)2(L0)]nþ, where n ¼ 2=3, L¼2,20-bipyridine (bpy)/1,10-phenanthroline (phen) and L0 ¼3-(pyridin-2-yl)-1,2,4-triazole (Hpytr), 1-methyl-3-(pyridin- 2-yl)-1,2,4-triazole (1M3pytr), 4-methyl-3-(pyridin-2-yl)-1,2,4-triazole (4Mpytr), 3,5-bis(pyridin-2-yl)-1,2,4-triazole (Hbpt), 4-amino- 3,5-bis(pyridin-2-yl)-1,2,4-triazole (NH2bpt) and 3-(pyridin-2-yl)-5-phenyl-1,2,4-triazole (HPhpytr), have been prepared and their synthesis and characterisation are reported. Crystals of [Rh(bpy)2(Phpytr)](PF6)2 and [Rh(phen)2(NHbpt)](PF6)2 were obtained and their structures determined. Analysis of X-ray crystallographic data showed that coordination of the metal centre in [Rh(phen)2(NHbpt)](PF6)2 occurs via the amine moiety and a nitrogen of the pyridine ring. NMR studies illustrated that coordination to the NH2bpt ligand was also possible via a nitrogen of the triazole ring and the pyridine ring forming the complex [Rh(phen)2(NH2bpt)](PF6)3. The absorption and emission properties of the complexes studied were found to be p–p in nature and preliminary evidence suggests that all complexes with the exception of [Rh(phen)2(NHbpt)](PF6)2 and [Rh(bpy)2(NHbpt)](PF6)2 are dual emitting at 77 K.
2004
H. M., Burke; J. F., Callager; Indelli, Maria Teresa; J. G., Vos
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1206291
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