Luminescence properties of some platinum (II) complexes. Counter-ion and molecular geometry effects

Camassei, F. Diomedi; Ancarani-Rossiello, L.; Castelli, Francesco

doi:10.1016/0022-2313(73)90036-7

Cited by 14 publications

(2 citation statements)

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“…47,48 Nevertheless, the microsecond lifetimes are within the expected range for d-d emissions from platinum(II) complexes. 34,49,50 The intense emissions from glassy solution samples of 3 and 4 excited at 300 nm are strongly blue-shifted with respect to the previous compounds. The sharply structured emissions clearly originate from the lowest pyridyl-centered π-π* excited states of the respective 4-phpy and 4,4′-bpy ligands.…”

Section: Resultsmentioning

confidence: 90%

“…However, in contrast to 1 , the emissions from solid salts of 2 are weakly excitation dependent (e.g., λ ex = 355 nm, λ max = 694 nm), indicating some contamination, presumably from a product of pyridine ligand substitution . In addition, whereas the emission decays for solid samples of 1 are adequately modeled with a single-exponential function (τ, 1.9 μs), the emission decays from repeatedly recrystallized samples of the triflate salt of 2 in glassy solution or the solid state required a biexponential function to obtain a reasonable fit (τ, 3, 11 μs). , Nevertheless, the microsecond lifetimes are within the expected range for d−d emissions from platinum(II) complexes. ,, …”

Section: Resultsmentioning

confidence: 96%

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Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

2003

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Triflate salts of four platinum(II) pyridyl complexes with a mer-coordinating tridentate pincer ligand, pip(2)NCN(-) (pip(2)NCNH = 1,3-bis(piperidylmethyl)benzene), are reported: Pt(pip(2)NCN)(L)(+) (2, L = pyridine; 3, L = 4-phenylpyridine; 5, L = 2,6-pyridinedimethanol) and [(Pt(pip(2)NCN))(2)(micro-4,4'-bipyridine)](2+) (4). The complexes have been fully characterized by (1)H NMR spectroscopy, elemental analysis, and X-ray crystallography. Compound 2(CF(3)SO(3)(-)): triclinic, P1, a = 9.7518(6) A, b = 12.0132(8) A, c = 12.6718(9) A, alpha = 114.190(2) degrees, beta = 100.745(3) degrees, gamma = 103.545(2) degrees, V = 1247.95(14) A(3), Z = 2. Compound 3(CF(3)SO(3)(-)): monoclinic, P2(1)/c, a = 15.550(2) A, b = 9.7386(11) A, c = 18.965(3) A, beta = 92.559(7) degrees, V = 2869.1(6) A(3), Z = 4. Compound 4(CF(3)SO(3)(-))(2).1/2(CH(3))(2)CO: monoclinic, I2/a, a = 21.3316(5) A, b = 9.6526(2) A, c = 26.1800(6) A, beta = 96.4930(10) degrees, V = 5356.0(2) A(3), Z = 4. Compound 5(CF(3)SO(3)(-)).3/2CHCl(3): monoclinic, P2(1)/n, a = 17.1236(10) A, b = 9.3591(5) A, c = 21.3189(11) A, beta = 96.11(3) degrees, V = 3397.2(3) A(3), Z = 4. The accumulated data indicate that the phenyl group of pip(2)NCN(-) labilizes the trans pyridyl ligand. The electronic structures were investigated using cyclic voltammetry, as well as UV-visible absorption and emission spectroscopies. Red emission from 2 in rigid media originates from a lowest triplet ligand field excited state, whereas yellow-green emissions from 3 and 4 originate from a lowest pyridyl ligand-centered triplet pi-pi state, indicating that substitution of the pyridyl ligand results in a dramatic change in the orbital character of the emissive state.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 96%

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

2003

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σ‐Pyridine Coordination Compounds with Transition Metals

1985

Chemistry of Heterocyclic Compounds: A Series of Monographs

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Thermal and Photoinduced Electron Transfer in Directional Bis(terpyridine)ruthenium(II)–(Bipyridine)platinum(II) Complexes

et al. 2013

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Metalloligands L1 and L2 consisting of directional bis(terpyridine)ruthenium(II) units and bipyridine moieties were constructed by amide formation. From these metalloligands two Ru-Pt heterobimetallic complexes 1 and 2 were derived by a building-block method by means of platination with [PtCl 2 (dmso) 2 ]. Both bimetallic complexes 1 and 2 feature metal-to-ligand charge transfer (MLCT) absorptions, and emission occurs at room temperature in fluid solution from 3 MLCT(Ru) states in all cases. Energy transfer from platinum [a]

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Luminescence properties of some platinum (II) complexes. Counter-ion and molecular geometry effects

Cited by 14 publications

References 28 publications

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

Tuning the Electronic Structures of Platinum(II) Complexes with a Cyclometalating Aryldiamine Ligand

σ‐Pyridine Coordination Compounds with Transition Metals

Thermal and Photoinduced Electron Transfer in Directional Bis(terpyridine)ruthenium(II)–(Bipyridine)platinum(II) Complexes

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