Enhanced Circularly Polarized Luminescence Activity in Chiral Platinum(II) Complexes With Bis- or Triphenylphosphine Ligands.
Front Chem
; 8: 303, 2020.
Article
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| MEDLINE
| ID: mdl-32391328
ABSTRACT
Distinct circularly polarized luminescence (CPL) activity was observed in chiral (Câ§Nâ§N)Pt(II) [(Câ§Nâ§N) = 4,5-pinene-6'-phenyl-2,2'-bipyridine] complexes with bis- or triphenylphosphine ligands. Compared to the pseudo-square-planar geometry of chiral (Câ§Nâ§N)Pt(II) complexes with chloride, phenylacetylene (PPV) and 2,6-dimethylphenyl isocyanide (Dmpi) ligands, the coordination configuration around the Pt(II) nucleus of chiral (Câ§Nâ§N)Pt(II) complexes with bulk phosphine ligands is far more distorted. The geometry is straightforwardly confirmed by X-ray crystallography. The phosphines' participation enhanced the CPL signal of Pt(II) complexes profoundly, with the dissymmetry factor (g lum) up to 10-3. The distorted structures and enhanced chiroptical signals were further confirmed by time-dependent density functional theory (TD-DFT) calculations.
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Base de datos:
MEDLINE
Idioma:
En
Revista:
Front Chem
Año:
2020
Tipo del documento:
Article
País de afiliación:
China