Luminescent mononuclear Pt(II) chloride complexes with C-linked 2,2′-bipyridyl tetrazole terdentate chelating ligands

Chen, Jing‐Lin; Tan, Xiu-Zhen; Chen, Xiuxiu; Wang, Jin-Yun; Cao, Xing-Fu; He, Lin; Hua, Jia-Yi; Wen, He‐Rui

doi:10.1016/j.inoche.2013.02.003

Cited by 14 publications

(4 citation statements)

References 31 publications

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“…The structure depicted in Figure a reveals that the platinum(II) center adopts a minimally distorted square-planar coordination geometry with the C1–Pt1–N7 trans angle of 178.50(18)° and N1–Pt1–N3 trans angle of 175.21(16)°. The bond lengths of the Pt1–C1 (ppy) (2.008(5) Å), Pt1–N1 (ppy) (2.021(4) Å), Pt–N3 (tetrazol) (2.014(4) Å), and Pt–N7 (tetrazol) (2.104(4) Å) are similar to those of previously studied mononuclear cyclometalated Pt(II) complexes. , Additionally, there are large dihedral angles (53.053°, 65.326°) between the tetrazol groups of the ancillary ligands (TTPPO) and Pt(ppy), taking advantage to prevent the π–π interactions between adjacent molecules. More importantly, the Zn 2+ ion adopts a typical octahedral coordination environment, which is furnished by the Pt(ppy)(TTPPO) 2 and another TTPPO.…”

Section: Results and Discussionsupporting

confidence: 80%

“…The structure depicted in Figure 1a reveals that the platinum(II) center adopts a minimally distorted square-planar coordination geometry with the C1−Pt1−N7 trans angle of 43,44 Additionally, there are large dihedral angles (53.053°, 65.326°) between the tetrazol groups of the ancillary ligands (TTPPO) and Pt(ppy), taking advantage to prevent the π−π interactions between adjacent molecules. More importantly, the Zn 2+ ion adopts a typical octahedral coordination environment, which is furnished by the Pt(ppy)(TTPPO) 2 and another TTPPO.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Formation of Hetero-binuclear Pt(II)-M(II) Complexes Based on (2-(1H-Tetrazol-5-yl)phenyl)diphenylphosphine Oxide for Superior Phosphorescence of Monomers

et al. 2019

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Novel hetero-binuclear platinum complexes (HBC-Pt(II)-M(II), M = Ca(II), Mg(II), Zn(II), and Cd(II)) have been synthesized by the reaction of the corresponding precursors [Pt(ppy)(μ-Cl)]2 with (2-(1H-tetrazol-5-yl)phenyl)diphenylphosphine oxide (TTPPO). The X-ray structures of the complexes show that two ancillary ligands TTPPO in the square-planar Pt(II) moiety act as a quadridentate chelating agent for the other metal center, eventually forming a distorted octahedral configuration. There are no significant π–π interactions and Pt–M metallophilic interactions in the crystal lattice, due to the steric hindrances associated with the rigid octahedral structure together with the bulky TTPPO. Consequently, HBC-Pt-M complexes show monomer emission characteristics with quantum yields up to 59% in powder, suggesting their great potential for practical applications. DFT and TD-DFT calculations on HBC-Pt-Zn reveal that the phosphorescence can be ascribed to intraligand charge transfer (3ILCT) combined with some metal-to-ligand charge transfer (3MLCT) in the Pt(ppy) moiety, which is consistent with the observations from the photophysical investigations.

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Section: Results and Discussionsupporting

confidence: 80%

Section: ■ Results and Discussionmentioning

confidence: 99%

Formation of Hetero-binuclear Pt(II)-M(II) Complexes Based on (2-(1H-Tetrazol-5-yl)phenyl)diphenylphosphine Oxide for Superior Phosphorescence of Monomers

et al. 2019

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“…[23] The electron-withdrawing CF 3 substituento fp z CF3 bpy chelate effectively reduced the donor strength of the adjacent nitrogen atom. [26] Moreover,c omplex 9 was allowed to react with silver acetate to give acetate derivative[ Pt(pz CF3 bpy)(OAc)]( 11); in this reactiont he Ag + ion served as the chloride scavenger,a nd the acetate occupied the fourth coordinations ite of the Pt II metal atom. [24] Single crystals of 9 were obtainedb yc ooling the saturated sample of the complex in am ixture of DMSO and acetone.…”

Section: Introductionmentioning

confidence: 99%

“…SubsequentX -ray analysiss howed similar zigzag packing arrangement as found for pyrazolyl complex 9,b ut with two distinctive Pt···Pt separations of 3.415 and 5.469 and as lightly decreased Pt-Pt-Pt angle to 130.98. [26] Moreover,c omplex 9 was allowed to react with silver acetate to give acetate derivative[ Pt(pz CF3 bpy)(OAc)]( 11); in this reactiont he Ag + ion served as the chloride scavenger,a nd the acetate occupied the fourth coordinations ite of the Pt II metal atom. Similarly,t he treatmento f9 with one equivalent of AgBF 4 in acetonitrile afforded an orange-yellow complext hat was identifieda s[ Pt(pz CF3 bpy)(NCMe)](BF 4 )( 12)a ccording to the spectral data.…”

Section: Introductionmentioning

confidence: 99%

Metal Complexes with Azolate‐Functionalized Multidentate Ligands: Tactical Designs and Optoelectronic Applications

Wang

Chi

2016

Chemistry A European J

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This review is aimed at updating the recent development on the metal complexes bearing azolate-containing chelates that have received a growing attention from both the industrial and academic sectors. Particular emphasis is given to the luminescent metal complexes, for which tridentate and multidentate bonding interactions give rise to both higher ligand field strength and better rigidity versus their bidentate counterparts-consequently, this is beneficial to the chemical stability and emission efficiency needed for applications such as organic light-emitting diodes and bio-imaging. Their basic designs involve chelates, such as monoanionic 6-azolyl 2,2'-bipyridine, dianionic 2,6-diazolylpyridine, and 2-azolyl-6-phenylpyridine, and the core metal ion spanning from main group elements, such as Ga and In , to the late transition metal ions such as Ru , Os , Ir , and Pt and even the lanthanides. Furthermore, the great versatility of these azolate chelates for assembling the robust and emissive metal complexes, provides bright prospect in future optoelectronic investigations.

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Heteroleptic Complexes of the Tridentate Pyridine‐2,6‐di‐tetrazolate Ligand

et al. 2017

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The synthesis and spectroscopic characterisation of a series of heteroleptic complexes of the tridentate pyridine-2,6-di-(5-tetrazolate) (pydtz(2-)) with Co(II), Ni(II), Cu(II) and Zn(II) and pyridine (Py) and H2O as coligands is reported. Single crystal XRD data reveals the formation of octahedrally configured complexes [Co(pydtz)(H2O)(Py)(2)], [Co(pydtz)(H2O)(2)(Py)]2H(2)O, [Ni(pydtz)(Py)(3)]2Py, and [Zn(pydtz)(H2O)(Py)(2)]Py, and a markedly Jahn-Teller distorted octahedral structure for [Cu(pydtz)(H2O)(2)(Py)]. Magnetic measurements reveal a S = 3/2 high-spin configuration for the Co(II) complex [Co(pydtz)(H2O)(Py)(2)], an S = 1 ground state for the Ni(II) derivative and S = 1/2 Cu(II) ions for [Cu(pydtz)(H2O)(2)(Py)], the latter is supported by electron-paramagnetic-resonance spectroscopy. The crystalline materials are subject to severe corrosion as revealed by powder XRD and DSC-TG experiments. H2O and pyridine co-crystallisates and coligands are easily cleaved. At the same time DSC-TG reveal very high stability of the [M(pydtz)] fragments with exothermic decomposition at T > 300 degrees C. As a consequence, in pyridine solution in all cases the species [M(pydtz)(Py)(3)] are observed. Ultraviolet-visible light absorption spectroscopy reveals a strong ligand field procured by the pydtz(2-) ligand and electrochemical measurements suggest very strong sigma-donation but only weak -accepting abilities of pydtz(2-) compared to the isostructural terpy (2,2';6',2''-terpyridine) ligand

show abstract

Luminescent mononuclear Pt(II) chloride complexes with C-linked 2,2′-bipyridyl tetrazole terdentate chelating ligands

Cited by 14 publications

References 31 publications

Formation of Hetero-binuclear Pt(II)-M(II) Complexes Based on (2-(1H-Tetrazol-5-yl)phenyl)diphenylphosphine Oxide for Superior Phosphorescence of Monomers

Formation of Hetero-binuclear Pt(II)-M(II) Complexes Based on (2-(1H-Tetrazol-5-yl)phenyl)diphenylphosphine Oxide for Superior Phosphorescence of Monomers

Metal Complexes with Azolate‐Functionalized Multidentate Ligands: Tactical Designs and Optoelectronic Applications

Heteroleptic Complexes of the Tridentate Pyridine‐2,6‐di‐tetrazolate Ligand

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