(4,4'-Dimethyl-2,2'-bipyridyl-N,N')bis(isocyanato)platinum(II)

Coyer, M. J.; Herber, R. H.; Cohen, S.M.

doi:10.1107/s0108270190012665

Cited by 8 publications

(7 citation statements)

References 5 publications

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“…Since the original work on Pt(bpy)Cl 2 (bpy = 2,2‘-bipyridine) by Osborn and Rogers, only a few linear-chain platinum(II) diimine complexes have been structurally characterized. − Obtaining suitable crystals for X-ray diffraction studies is generally difficult, in part due to poor solubility. Moreover, since growth is rapid along the chain axis, crystals are typically thin needles and frequently twinned.…”

Section: Introductionmentioning

confidence: 99%

Linear-Chain Structures of Platinum(II) Diimine Complexes

et al. 1997

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I I;/ 'Mir~1llud11 %.1111111Ld1 OULY m1ulg11ln %'.lr11111 L1y V JU ragr, :7 1J O.UUU1LK31PIUMUIilLdi radgr I Table S1. Crystal and Intensity Collection Data for Pt(bpm)Cl 2 .0.5(nmp) (3) Formula: C 8 C1 2 H 6 N 4 Pt.0.5(C 5 H 9 NO) Formula weight: 473.72 Crystal color: Red Habit: Short needle Crystal Size: 0.10 x 0.19 x 0.31 mm pale = 2.38 g cm-3 Crystal System: Monoclinic Space group: C2/m (no. 12) a = 12.668(4) A b = 15.618(6) A) = 93.43(3)0 c = 6.704(3) A V = 1324.0(8) A 3 Z = 4 Lattice parameters: 25 reflections, 100 < 0 < 150 p. = 112.1 cm-1 Absorption correction: none Enraf-Nonius Cad-4 diffractometer w scans MoKa, A = 0.7107 A Graphite monochromator 20 range: 2-50'-15 < h < 15-18 K k < 18,0 < 1 < 7 T = 294 K Number of reflections measured: 2539 Number of independent reflections: 978 Number with F' > 0: 900 Number with F' > 3c(F2): 793 Standard reflections: 2 every 150 min. Variation: within counting statistics GOFmerge: 1.30 for 978 multiples Rmerge: 0.035 for 778 duplicates Number used in refinement: 978 Criterion: All reflections used Final R on F: 0.031 for 793 reflections with F > 3a(F2)

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Section: Introductionmentioning

confidence: 99%

Linear-Chain Structures of Platinum(II) Diimine Complexes

et al. 1997

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“…Although there are many examples of such materials, we have found few structural reports of platinum(ID diimine compounds forming such chains [Osborn & Rogers, 1974;Che, He, Poon & Mak, 1989;Coyer, Herber & Cohen, 1990, 1991(see Marsh, 1994; Biedermann, Gliemann, Klement, Range & Zabel, 1990]. In all but one of these reported structures, successive platinum diimine molecules are rotated by 180 ° about the chain axis, so that eclipsing of the ligands is avoided and the Pt...Pt...Pt chain is slightly zigzag.…”

Section: Introductionmentioning

confidence: 99%

“…The doubling could occur if systematically weak reflections with I odd had been overlooked in the original investigation: we t" Contribution No. 9163. imagined a structure, perhaps in space group Cmcm [as found by Osborn & Rogers, 1974, for the dichlorobipyridyl compound and by Coyer et al, 1991(see also Marsh, 1994, for the bis-isocyanato-4,4'-dimethylbipyridyl compound] with successive Pt atoms approximately but not exactly superposed. We report here a re-investigation of the structure, which confirms our suspicions.…”

Section: Introductionmentioning

confidence: 99%

A revision of the structure of (bipyridyl-N,N')-dicyanoplatinum(II)

Connick¹,

Henling²,

Marsh³

1996

Acta Crystallogr Sect B

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In a previous X-ray crystallographic study of crystals of Pt(bpy)(CN) 2 (bpy = 2,2'-bipyridine) the planar molecules were reported to be exactly eclipsed, stacked directly on top of one another with a spacing of 3.33 A so as to form a linear Pt...Pt...Pt chain. A reinvestigation shows this structure to be incorrect. The presence of weak intermediate layer lines indicates that the repeat distance along the stacking direction is 6.66A rather than 3.33 A. Successive molecules within the stack are rotated by 180 ° and the resulting Pt-atom chain is slightly zigzag with a Pt...Pt...Pt angle of 168.6(1) °. The implications are discussed of the determination and refinement of an apparently satisfactory, although grossly wrong, structure that was based on an incorrect unit cell and an incorrect space group.

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“…Second, platinum(II) moieties in all six structures show an alternate arrangement of antiparallel and staggered packing patterns and stack the 1D “Pt wire” structure along the c axis (Figures and S3–S9). In contrast, only one kind of packing pattern (mainly antiparallel packing pattern) is usually adopted in the 1D “Pt wire” structure of small molecular platinum(II) complexes such as Pt(bpy)Cl 2 , Pt(bpm)Cl 2 · 1 / 2 nmp, Pt(bpy)(NCS) 2 , Pt(bpy)(NCO) 2 , Pt(bpy)(CN) 2 , Pt(bpm)(CN) 2 ·DMF, Pt(dmbpy)(NCO) 2 , Pt(phen)(CN) 2 , and Pt(bph)(CO) 2 . − It has been well-known that the staggered packing pattern of diimineplatinum(II) complexes can effectively reduce the effect of steric hindrance of substituents during molecular stacking and is helpful for the formation of intermolecular Pt–Pt interactions. , Therefore, an alternate arrangement of two packing patterns is more conducive for a molecule containing larger sterically hindered substituents to construct a stable 1D “Pt wire” stacking structure.…”

Section: Resultsmentioning

confidence: 99%

“…Second, in most cases, the combination of a 1D “Pt wire” structure and other strategies to further reduce the emission energy of a platinum(II) complex is mutually limited. As a result, the luminescence of most platinum(II) complexes with a 1D “Pt wire” structure is still in the visible region. − Therefore, the development of a new strategy to achieve high-efficiency long-wavelength NIR luminescence of a diimineplatinum(II) complex is very important and necessary.…”

Section: Introductionmentioning

confidence: 99%

Strategy for Achieving Long-Wavelength Near-Infrared Luminescence of Diimineplatinum(II) Complexes

Jiajia

et al. 2021

Inorg. Chem.

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Although many strategies have been used to help design effective near-infrared (NIR) luminescent materials, it is still a huge challenge to realize long-wavelength NIR luminescence of diimineplatinum(II) complexes in the solid state. Herein, we have successfully achieved long-wavelength NIR luminescence of a family of diimineplatinum(II) complexes based on a new strategy that combines a one-dimensional (1D) "Pt wire" structure with the electronic effect of the substituent. The structures of six solvated diimineplatinum(II) complexes based on 4,4-dichloro-2,2′-bipyridine or 4,4-dibromo-2,2′-bipyridine and 4-substituted phenylacetylene ligands have been determined, namely, and 6• 1 / 4 toluene. All of them crystallize in the monoclinic space group C2/c or C2/ m and stack in the 1D "Pt wire" structure. In the solid state, six complexes exhibited unusual long-wavelength metal−metal-to-ligand charge-transfer luminescence that peaked at 984, 1044, 972, 990, 1022, and 935 nm, respectively. Interestingly, 2• 1 / 2 THF has the shortest Pt•••Pt distance and the longest emission wavelength among the six complexes. As far as we know, the luminescence of 2• 1 / 2 THF at 1044 nm is the longest emission wavelength among known diimineplatinum(II) complexes. Systematic studies revealed that good molecular planarity, suitable substituent position, weak hydrogen-bond-forming ability of the substituents, appropriate molecular bending, and weakening of the interaction between solvated molecules and platinum molecules are conducive to the construction of a 1D "Pt wire" structure of the diimineplatinum(II) complex. Furthermore, the emission energy of the complex is mainly determined by the strength of the Pt−Pt interaction and electronic effect of the substituent.

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(4,4'-Dimethyl-2,2'-bipyridyl-N,N')bis(isocyanato)platinum(II)

Cited by 8 publications

References 5 publications

Linear-Chain Structures of Platinum(II) Diimine Complexes

Linear-Chain Structures of Platinum(II) Diimine Complexes

A revision of the structure of (bipyridyl-N,N')-dicyanoplatinum(II)

Strategy for Achieving Long-Wavelength Near-Infrared Luminescence of Diimineplatinum(II) Complexes

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