Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups

Siemeling U, Bausch K, Fink H, Bruhn C, Baldus M, Angerstein B, Plessow R, Brockhinke A (2005)
JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS 2005(14): 2365-2374.

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Abstract
The new diimine ligand 3,8- di- n- pentyl- 4,7- di( phenylethynyl)- 1,10- phenanthroline ( 1) was used for the synthesis of a range of PtII complexes, viz. [ Pt( 1) Cl-2], [ Pt( 1)C&3bond; C - Ph)(2)], [ Pt( 1)( C&3bond; C - Fc)(2)] and [ Pt( 1)( C&3bond; C - p- C6H4- C&3bond; C - Fc)(2)] ( Fc = ferrocenyl). Crystal structure analyses were performed for [ Pt( 1) Cl-2] and [ Pt( 1)( C&3bond; C - Ph)(2)] and revealed that the di( acetylide) pi- tweezer of the latter binds a molecule of chloroform through C - H (...) pi hydrogen bonds. The redox and optical properties of 1 and its complexes were investigated by ( spectro-) electrochemistry, UV - Vis and luminescence spectroscopy, and an energy level diagram was derived for [ Pt( 1)( C&3bond; C - Fc)(2)] and related compounds on the basis of the data collected. The ferrocenyl- substituted PtII complexes are donor - sensitiser assemblies. Intramolecular quenching of the photoexcited PtII diimine unit leads to very short luminescence lifetimes for [ Pt( 1)( C&3bond; C - p- C6H4 - C&3bond; C - Fc)(2)] ( 2 ns) and [ Pt( 1)( C&3bond; C - Fc)(2)] ( 0.3 ns), as opposed to [ Pt( 1)( C&3bond; C - Ph)(2)] ( 0.7 mu s). Excimer formation has been observed for [ Pt( 1)( C&3bond; C - Ph)(2)] at room temperature in dichloromethane and at low temperatures in frozen glassy dichloromethane and 2- methyltetrahydrofuran solution, but not in the solid state.
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Siemeling U, Bausch K, Fink H, et al. Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS. 2005;2005(14):2365-2374.
Siemeling, U., Bausch, K., Fink, H., Bruhn, C., Baldus, M., Angerstein, B., Plessow, R., et al. (2005). Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS, 2005(14), 2365-2374.
Siemeling, U., Bausch, K., Fink, H., Bruhn, C., Baldus, M., Angerstein, B., Plessow, R., and Brockhinke, A. (2005). Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS 2005, 2365-2374.
Siemeling, U., et al., 2005. Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS, 2005(14), p 2365-2374.
U. Siemeling, et al., “Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups”, JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS, vol. 2005, 2005, pp. 2365-2374.
Siemeling, U., Bausch, K., Fink, H., Bruhn, C., Baldus, M., Angerstein, B., Plessow, R., Brockhinke, A.: Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS. 2005, 2365-2374 (2005).
Siemeling, Ulrich, Bausch, K., Fink, H., Bruhn, C., Baldus, M., Angerstein, B., Plessow, Regina, and Brockhinke, Andreas. “Platinum(II) 1,10-phenanthroline complexes of acetylides containing redox-active groups”. JOURNAL OF THE CHEMICAL SOCIETY, DALTON TRANSACTIONS 2005.14 (2005): 2365-2374.
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