Loading...

Synthesis, Characterization and Emission Study of Carbazole-Based Platinum(II) Pincer Complexes and their Emission Properties

Hosseini, Mahsa | 2024

1 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56860 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Jamali, Sirous
  7. Abstract:
  8. Platinum(II) complex [Pt(Carb-PPh2)Cl] (1) (Carb-PPh2 = 1,8-bis(phosphino)-3,6-di-tert-butyl carbazole) was synthesized from the reaction of K2[PtCl4] salt with PNP carbazole-based pincer ligand, 1,8-bis(phosphino)-3,6-di-tert-butyl carbazole (c) and LiHMDS in a 1:2:1.1 molar ratio. The structure of 1 was characterized by X-ray crystallography in solid state, NMR spectroscopy, UV-Vis spectroscopy, and photoluminescence spectroscopy in solution state. Platinum(II) complex [Pt(Carb-PPh2)(C≡CPh)] (2) was prepared from the reaction of complex 1 with phenylacetylene with a 3:1 molar ratio in the presence of CuI as a catalyst and triethylamine. Complex 2 was identified by NMR spectroscopy, UV-Vis spectroscopy, and photoluminescence spectroscopy in solution state. Complex 1 has yellow emission in solid state under 365 nm ultraviolet light and does not show emission in the solution. The solution of complex 1 shows yellow emission during the Aggregation Induced Emission (AIE) phenomenon. According to the crystal structure of this compound, the cause of its emission in the aggregated form can be C-H...π intermolecular interaction between the C-H of phenyls in phosphine groups of a molecule and the π system of carbazole in another molecule. Complex 2 shows green emission in solid state and no emission in the solution. The solution of this compound also shows AIE and has a strong green emission. Due to the addition of the tert-butyl chloride compound to complex 2 in its aggregated form, it undergoes quenching and does not show any emission. As a result, this complex can be candidate for alkyl chloride bond activation. More studies in this field are under consideration
  9. Keywords:
  10. Carbazole ; Absorption ; Platinum Complex ; PNP Ligand ; Pincer Ligand ; Bond Activation ; Emission

 Digital Object List

 Bookmark

No TOC