866566-10-1Relevant academic research and scientific papers
Cyclometalated platinum complexes: High-yield synthesis, characterization, and a crystal structure
Cho, Jian-Yang,Suponitsky, Kyrill Yu.,Li, Jennifer,Timofeeva, Tatiana V.,Barlow, Stephen,Marder, Seth R.
, p. 4090 - 4093 (2005)
The one-pot reaction of K2PtCl4 and various 2-arylpyridines, H?N, in a 3:1 (v/v) mixture of 2-ethoxyethanol and H2O at 80 °C for 16 h affords cyclometalated platinum complexes, Pt(?N)(H?N)(Cl), in high yield. These have been fully characterized and, in one case, the X-ray structure has been determined.
Synthesis and characterization of polymerizable phosphorescent platinum(II) complexes for solution-processible organic light-emitting diodes
Cho, Jian-Yang,Domercq, Benoit,Barlow, Stephen,Suponitsky, Kyrill Yu.,Li, Jennifer,Timofeeva, Tatiana V.,Jones, Simon C.,Hayden, Lauren E.,Kimyonok, Alpay,South, Clinton R.,Weck, Marcus,Kippelen, Bernard,Marder, Seth R.
, p. 4816 - 4829 (2008/10/09)
A norbornene-functionalized derivative of acetylacetone has been used to synthesize a series of new polymerizable norbornene-derivatized phosphorescent platinum complexes of the form Pt(C∧N)(O∧O*) where C∧N represents a cyclometalated ligand and O∧O* represents the functionalized acetylacetonate ligand. The complexes have been fully characterized, and the structures of three examples have been determined by X-ray diffraction. Solution absorption and luminescence spectra and electrochemical data are very similar to those for analogues without these polymerizable groups. A 9,9-dialkyl-2,7-di(carbazol-9-yl)fluorene material, in which one of the alkyl groups bears a norbornene group, has been synthesized and copolymerized with the Pt(C∧N)(O∧O*) complexes using Grubbs ruthenium catalysts, resulting in copolymers with broad molecular weight distributions. The copolymers have been used as lumophores in organic light-emitting diodes, thus demonstrating that platinum phosphors can be successfully integrated into the "hybrid" approach to organic light-emitting diodes, in which molecules with transport or luminescent properties are covalently attached to electronically inert polymer backbones to give solution-processible materials. Emission from aggregate states appears to play a similar role in these copolymers to that seen in vapor-deposited devices based on small phosphor and host molecules; in particular, considerable aggregate emission is observed when a phosphor with blue solution emission is used in the devices.
