Luminescence properties of two new Pt(II)-2-phenylpyridine complexes; the influence of metal-carbon bonds

1H, 13C, 15N and 195Pt NMR studies of Au(III) and Pt(II) chloride organometallics with 2‐phenylpyridine

“…In the chelated 2ppy * moiety of trans(N,N)-[Pt(2ppy * )(2ppy)Cl], large deshielding of H(6) * (δ H(6) * = 9.59 ppm, H(6) * coord = 0.93 ppm) is observed, being more expressed than for H(6) in the monodentately bonded 2ppy ring (δ H(6) = 9.22 ppm, H(6) coord = 0.56 ppm); in contrast, for trans-[Pt(2ppy) 2 Cl 2 ] this effect was negligible ( H(6) coord = 0.04 ppm). [40] The same dependency can be found (Table S3, Supporting Information) for [Pt(3-hexyloxy-2ppy * )(3-hexyloxy-2ppy)Cl] ( H(6) * coord = 1.05 ppm versus H(6) coord = 0.50 ppm), [18] [Pt(2-(4-methylphenyl)-py * )(2-(4-methylphenyl)-py)Cl] ( H(6) * coord = 0.93 ppm versus H(6) coord = 0.58 ppm), [19] [Pt(2-(4-methoxyphenyl)-py * )(2-(4-methoxyphenyl)-py)Cl] ( H(6) * coord = 0.74 ppm versus H(6) coord = 0.44 ppm), [17] [5,9,17,20,21] H(6) * coord = 1.22 ppm for [Pt(2ppy * )(P(C 6 H 5 ) 3 )Cl]; [22] H(6) * coord = 0.73-0.79 ppm for [Pt(2ppy * )(CN) 2 ] − .…”

“…In the latter case, it forms a large number of cyclometallated species, which can be regarded as either organometallic or coordination compounds. [2] Among them, an important group are the chloride species; a few of them were investigated by single crystal X-ray diffraction: [Au(2ppy * )Cl 2 ] -IJAQEP, [3] (CH 3 CH 2 CH 2 CH 2 ) 4 N[Pt(2ppy * )Cl 2 ] -ZUDGAG, [4] trans(N,N)-[Pt(2 ppy * )(2ppy)Cl] -YUBJEK, YUBJEK01. [5,6] Some other X-ray structures were reported for the related Au(III) and Pt(II) cyclometallated compounds with various auxiliary ligands, e.g.…”

“…[Au(2ppy * [3] trans(S,N)-[Au(2ppy * )(SCN)(NCS)] -ILETOI; [7] trans(C,N)-[Au(2ppy * )(CH 2 COCH 3 )Cl] -BIGRAL and trans(C,N)-[Au(2ppy * ) (CH 2 COCH 3 )(ONO 2 )] -BIGREP; [8] [9] [Pt(2ppy * )(NH 2 CH 2 CH 2 NH 2 )]Cl -ZUDGIO; [4] trans(C,N)-[Pt(2ppy * ) (DMSO)(CH 3 )] -BEZPEC; [10] trans(C,N)-[Pt(2ppy * )(DMSO)(C 6 H 5 )] -TICSII and trans(C,N)-[Pt(2ppy * )(DMSO) (3,5-dimethylphenyl)] -TICSEE; [11] trans(N,N)-[Pt(2ppy * )(8-oxyquinolinate)] -WESQUH; [12] cis-[Pt(2ppy * ) 2 ] -CULWUB; [13] K[Pt(2ppy * )(CN) 2 ]· 2(CH 3 COC H 3 ). [14] These or similar compounds were also investigated by 1 H and/or 13 C NMR methods: [Au(2ppy * )Cl 2 ]; [1,3,15] [Au(2ppy * ) (OCOCH 3 [3] [Au(2ppy * )(SC H 2 CH 2 S)] and [Au(2ppy * )(SCH 2 CH 2 NH 2 )] + ; [15] trans(S,N)-[Au(2p py * )(SCN)(NCS)]; [7] trans(C,N)-[Au(2ppy * )(CH 2 COCH 3 )(ONO 2 )]; [8] [Au(2ppy * )(NH 2 CH 2 CH 2 NH 2 )] 2+ and [Au(2ppy * )(2,2 -bipyridine )] 2+ ; [16] trans(N,N)-[Pt(2ppy * )(2ppy)Cl]; [2,5,9,17 -19] [Pt(2ppy * )(2ppy) X] (X = Br, I, SCN, ONO 2 , NO 2 ); [19] [Pt(2ppy * )Cl 2 ] − ; [2] [Pt(2ppy * ) (CO)Cl]; [5,17,20] [Pt(2ppy * )(NH 3 )Cl]; [17] trans(S,N)-[Pt(2ppy * )(DMSO) Cl]; [9,17,21] [Pt(2ppy * )(P(C 6 H 5 ) 3 )Cl] and [Pt(2ppy * )(py)Cl]; [22] [Pt(2p py * )(CN) 2 ] − ; [14,23] [Pt(2ppy * )(2,4-pentanedionate)], [Pt(2ppy * )(1,1, 1,5,5,5-hexafluoro-2,4-pentanedionate)], [Pt(2ppy * )(2,2,6,6-tetramethyl-3,5-heptanedionate)] and [Pt(2ppy * )(benzoylacetonate )]; [21,...…”

Synthesis, structures and spectroscopic properties of platinum complexes containing orthometalated 2-phenylpyridine

“…Ancillary ligands in orthometalated 2-arylpyridine complexes of platinum(II) also play a crucial role on photophysical properties. For instance, [Pt(ppy)Cl 2 ] À (Hppy = 2-phenylpyridine) is not luminescent in solution at room temperature whereas [Pt(ppy)(Hppy)Cl] is luminescent under similar conditions [19]. Much of the studies on role of photophysical properties of orthometalated 2-arylpyridine type ligand complexes of platinum(II) are concerned with b-diketonate derivatives [17,18,20,21].…”

[Pt(topy)(Htopy)(ONO2)] complex (Htopy = 2‐p‐tolylpyridine) and its analogs: 195Pt NMR spectra and fabrication of light‐emitting devices

“…[26,27] Craig et al synthesized a 1a complex using dichloro(1,5-cyclooctadiene)platinum(II) as a starting material in ethanol. [28] The reaction mixture was stirred for 48 h under a flow of nitrogen gas, and the product was obtained in 59% 4 ] with 2-arylpyridine in the presence of 3 : 1 2-ethoxyethanol/H 2 O as solvent and a flow of nitrogen gas at 80…”