Efficiently red emitting cycloplatinated(II) complexes supported by N^O and N^P benzimidazole ancillary ligands

Zhang, Han; Liu, Chunmei; Du, Chenxia; Zhang, Bin

doi:10.1016/j.jorganchem.2021.122237

Cited by 5 publications

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“…The geometries of complexes ( 4–6 ) (Figures and S29 and S30) are quite similar, and they all adopt apparently distorted square-planar configurations around Pt(II) centers by chelating with the bt ligand and deprotonated ancillary ligands ( L4–L6 ). The P–Pt–N bite angles are in the range of 84.49–85.71°, which are close to those of reported Pt(II) complexes with six-membered chelate rings. ,, The bond lengths of Pt–C (2.021(8)–2.044(8) Å) and Pt–N (bt) (2.106(6)–2.121(6) Å) are close to those of bt-based cyclometalated Pt(II) complexes . The two Pt–N (bt) bond lengths (2.037–2.044 Å) of complex 2 are obviously shorter than those of complexes ( 4–6 ), which may be due to the trans-effect exerted by the PPh 2 group. , Moreover, complex 2 displays slightly distorted square-planar geometries around Pt(II) centers, and the dihedral angles between C–Pt–N and N–Pt–N chelate planes are 3.564–3.569°.…”

Section: Resultsmentioning

confidence: 99%

“…Our previous work demonstrated highly luminescent platinum(II) complexes using (2-(1 H -tetrazol-5-yl)phenyl)diphenylphosphine oxide (TTPPO) as the bulky ancillary ligand . In our recent work, Pt(II) complexes with excellent monomeric emissions were obtained based on benzimidazole derivatives modified with bulky OPPh 3 or PPh 3 groups. − …”

Section: Introductionmentioning

confidence: 99%

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Highly Emissive Platinum(II) Complexes Bearing Bulky Phenyltriazolate Ligands: Synthesis, Structure, and Photophysics

et al. 2022

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Dinuclear and mononuclear cycloplatinated(II) complexes (1−3 and 4−6) with formulas [Pt(bt)(μ-L)] 2 and Pt(bt)(L) [bt = 2-phenylbenzothiazole, μ-L = deprotonated diphenyl(2-(5-phenyl-4H-1,2,4-triazol-3yl)phenyl)phosphine oxide derivatives for L1−L3, and L = deprotonated 3-(2-(diphenylphosphino)phenyl)-5-phenyl-4H-1,2,4-triazole derivatives for L4−L6]have been successfully synthesized and systematically characterized. Singlecrystal X-ray analysis demonstrates that these complexes exhibit distorted square-planar geometries around Pt(II) centers. There are no apparent intermolecular π−π and Pt−Pt interactions owing to the presence of bulky ligands. Therefore, these complexes achieve excellent monomeric emission in solution, PMMA films, and the solid state with a photoluminescence quantum yield (Φ) up to 67.3% in the solid state. The photophysical behaviors associated with theoretical investigations reveal that the emissions of these complexes possess primarily a 3 LC feature together with some 3 MLCT character.

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