Journal of Photoscience

Korean Society of Photoscience (한국광과학회)
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Synthesis and Characterization of Phosphorescent Platinum and Iridium Complexes of 6-Chloro-3-phenylpyridazine

  • Lee, Sang-Jin (Department of Chemical System Engineering, Hongik University) ;
  • Seok, Kang (Department of Chemical System Engineering, Hongik University) ;
  • Lee, Jae-Sung (Department of Chemical System Engineering, Hongik University) ;
  • Lee, Seung-Hee (Department of Chemical System Engineering, Hongik University) ;
  • Hwang, Kwang-Jin (Department of Chemical System Engineering, Hongik University) ;
  • Kim, Young-Kwan (Department of Basic Science, Hongik University) ;
  • Kim, Young-Sik (Department of Basic Science, Hongik University)
  • Published : 2003.08.01
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Abstract

The preparation and the photophysics of organometallic Pt(II) and Ir(III) complexes with 6-ch1oro-3-phenylpyridazine (H6Clppdz) are reported. $K_2$PtCl$_4$ and IrCl$_3$ㆍn$H_{2}O$ cleanly cyclometalate with H6Clppdz, forming the corresponding chloro-bridged dimers, (6Clppdz)Pt($\mu$-Cl)$_2$Pt(6Clppdz) and (6Clppdz)$_2$Ir($\mu$-Cl)$_2$Ir(6Clppdz)$_2$ in good yield. These chloro-bridged dimers are cleaved with acetylacetone (Hacac) to give the corresponding monomer, (6Clppdz)Pt(acac) and (6Clppdz)$_2$ Ir(acac), respectively. Both complexes show bright orange luminescence at room temperature and the emission wavelengths are different depending on the metal and the structure of complexes. (6Clppdz)Pt(acac) shows two sharp emission bands in shorter wavelength ($\lambda$$_{em}$=541 and 580 nm), while (6Clppdz)$_2$ Ir(acac) shows a broad emission band in longer wavelength ($\lambda$$_{em}$=615 nm). Strong spinorbit coupling due to the heavy metal atom allows for the formally forbidden mixing of the $^1$MLCT with the $^3$MLCT and $^3$$\pi$-$\pi$$^{*}$ states.

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References

  1. Chem. Mater v.11 Efficient saturated red organic light emitting devices based on phosphorescent platinium(Ⅱ) Porphyrins Kwong;R.C.;Sibley,S.;Dubovoy,T.;Baldo,M.A.;Forrest,S.R.;Thompson,M.E.
  2. Appl. Phys. Lett. v.78 High-efficiency red electrophosphorescence devices Adachi,C.;Baldo,M.A.;Forrest,S.R.;Lamansky,S.;Thompson,M.E.;Kwong,R.C.
  3. Adv. Mater v.11 Harvesting singlet and triplet energy in polymer LEDs Cleave,V.;Yahioglu,G.;Barny,P.L.;Friend,R.H.;Tessler,N.
  4. Chem. Eur. J. v.7 Organic light-emitting materials based on bis(arylacetylide)platinium(Ⅱ) complexes bearing substituted bispyridine and phenanthroline ligands: photo and electroluminescence from ³MLCT excited states Chan,S.­C.;Chan,M.C.W.;Wang,Y.;Che,C.­M.;Cheung,K.K.;Zhu,N.
  5. Inorg. Chem. v.41 Synthesis and characterization of phosphorescent cyclometalated platinum complexes Brooks,J.;Babayan,Y.;Lamansky,S.;Djurovich,P.I.;Tsyba,I.;Bau,R.;Thompson,M.E.
  6. Inorg. Chem. v.40 Synthesis and Characterization of Phosphorescent Cyclometalated Iridium Complexes Lamansky,S.;Djurovich,P.;Murphy,D.;Abdel-Razzaq,F.;Kwong,R.;Tsyba,I.;Bortz,M.;Mui,B.;Bau,R.;Thompson,M.E.
  7. Appl. Phys. Lett v.75 Very high-efficiency green organic light-emitting devices based on electrophosphorescence Baldo,M.A.;Lamansky,S.;Burrows,P.E.;Thompson,M.E.;Forrest,S.R.
  8. Appl. Phys. Lett v.77 High-efficiency organic electrophosphorescent devices with tris(2phenylpyridine)iridium doped into electrontransporting materials Adachi,C.;Baldo,M.A.;Forrest,S.R.;Thompson,M.E.
  9. Inorg. Chem. v.33 Synthesis and Characterization of Luminescent Square-Planar Platinum(Ⅱ) Complexes Containing Dithiolate or Dithiocarbamate Ligands Bevilacqua,J.M.;Eisenberg,R.
  10. U. S. Patent v.182 Organometallic compounds and emission-shifting organic electrophosphorescence Lamansky,S.;Thompson,M.E.;Adamovich,V.;Djurovich,P.I.;Adachi,C.;Baldo,M.A.;Forrest,S.R.;Kwong,R.
  11. Inorg. Chem. v.30 Photoluminescence properties of chloro amine complexes of platinum(Ⅳ) Balashev,K.P.;Simon,J.;Ford,P.C.
  12. Mat. Sc.Eng. C Synthesis and characterization of phosphorescent platinum complexes containing phenylpyridazine Lee,S.J.;Kang,S.;Lee,S.H.;Hwang,K.J.;Park,N.K.;Kim,Y.S.