Synthesis, photophysical and electrochemical properties, and biological labelling studies of luminescent cyclometallated iridium(III) bipyridine-aldehyde complexes |
| |
Authors: | Kenneth Kam-Wing Lo Joe Sai-Wan Chan Vic Wing-Hang Tsang |
| |
Institution: | a Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China b Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China |
| |
Abstract: | We report the synthesis, characterisation, and photophysical and electrochemical properties of a series of luminescent cyclometallated iridium(III) bipyridine-aldehyde complexes Ir(N-C)2(bpy-CHO)](PF6) (HN-C=2-phenylpyridine, Hppy (1); 2-(4-methylphenyl)pyridine, Hmppy (2); 1-phenylpyrazole, Hppz (3); 3-methyl-1-phenylpyrazole, Hmppz (4); 7,8-benzoquinoline, Hbzq (5); 2-phenylquinoline, Hpq (6); bpy-CHO=4-formyl-4′-methyl-2,2′-bipyridine). The X-ray crystal structures of complexes 1 and 4 have been determined. On the basis of the photophysical data, the emission of these complexes is assigned to an excited state of predominantly triplet metal-to-ligand charge-transfer (3MLCT) (dπ(Ir) → (bpy-CHO)) character. For complex 6, the excited state is also mixed with substantial (3IL) ( ) (pq−) character. The protein bovine serum albumin has been labelled with these complexes to produce luminescent bioconjugates. The photophysical properties of the luminescent conjugates have also been investigated. |
| |
Keywords: | Biological labels Crystal structures Electrochemistry Iridium(III) complexes Luminescence |
本文献已被 ScienceDirect 等数据库收录! |
|