Skip to main content Accessibility help
×
Home

Platinum-Functionalized Chiral Molecular Squares as Light-Emitting Materials

  • Lin Zhang (a1), Yu-Hua Niu (a2), Alex K.-Y. Jen (a2) and Wenbin Lin (a1)

Abstract

A family of new chiral metallocycles based on Pt(II) diimine metallocornors and bis(acetylene) bridging ligands have been synthesized, and characterized by a variety of techniques including 1H and 13C NMR, UV-visible, luminescence, infrared, and circular dichroism (CD) spectroscopies, and mass spectrometry. All metallocycles exhibit very strong phosphorescence with quantum yields of 8.3 to 15.7%. Chiral Pt(II)-based molecular squares were used as the light-emitting layer in multiplayer devices, and a maximum brightness of 5470 cd/m2 with a maximum luminous efficiency of 0.93 cd/A was achieved.

Copyright

References

Hide All
1. (a) Stang, P.J., Olenyuk, B., Acc. Chem. Res. 1997, 30, 502.
(b) Fujita, M., Chem. Soc. Rev. 1998, 27, 417425.
(c) Holliday, B.J., Mirkin, C.A., Angew. Chem. Int. Ed. 2001, 40, 20222043. (d)
2. (a) Yoshizawa, M., Kusukawa, T., Fujita, M., Sakamoto, S., Yamaguchi, K., J. Am. Chem. Soc. 2001, 123, 1045410459.
(b) Yoshizawa, M., Takeyama, Y., Kusukawa, T., Fujita, M., Angew. Chem. Int. Ed. 2002, 41, 13471349.
3. Dinolfo, P.H., Hupp, J.T., Chem. Mater. 2001, 13, 3113.
4. (a) Jiang, H., Hu, A., Lin, W., Chem. Commun. 2003, 96.
(b) Jiang, H., Lin, W., Org. Lett. 2004, 6, 861864.
5. Jiang, H., Lin, W., J. Am. Chem. Soc. 2004, 126, 74267427.
6. (a) Chen, F.-C., Yang, Y., Thompson, M.E., Kido, J., J. Appl. Phys. Lett. 2002, 80, 23082310.
(b) Lamansky, S., Djurovich, P., Murphy, D., Abdel-Razzaq, F., Lee, H.-E., Adachi, C., Burrows, P.E., Forrest, S.R., Thompson, M.E., J. Am. Chem. Soc.; 2001, 123, 43044312.
(c) Rudmann, H., Shimada, S., Rubner, M.F., J. Am. Chem. Soc. 2002, 124, 49184921.
(d) Ostrowski, J.C., Robinson, M.R., Heeger, A.J., Bazan, G.C., Chem. Commun. 2002, 784785.
(e) Carlson, B., Phelan, G.D., Kaminsky, W., Dalton, L., Jiang, X., Liu, S., Jen, A. K.-Y., J. Am. Chem. Soc. 2002, 124, 1416214172.
7. Chan, C.W., Cheng, L.K., Che, C.M., Coord. Chem. Rev. 1994, 132, 8797.
8. (a) McGarrah, J.E., Eisenberg, R., Inorg. Chem. 2003, 42, 43554365.
(b) Whittle, C.E., Weinstein, J.A., George, M.W., Schanze, K.S., Inorg. Chem. 2001, 40, 40534062.
(c) Pomestchenko, I.E., Luman, C.R., Hissler, M., Ziessel, R., Castellano, F.N., Inorg. Chem. 2003, 42, 13941396.
(d) Adams, C.J., James, S.L., Liu, X., Raithby, P.R., Yellowlees, L.J., J. Chem. Soc., Dalton Trans. 2000, 6367.
(e) Yam, V. W.-W., Acc. Chem. Res. 2002, 35, 555563.
9. Bis(acetylide)Pt(II) complexes have recently been used as emissive materials in LED devices. See: S.-C. Chan, M.C.W. Chan, Y. Wang, C.-M. Che, K.-K. Cheung, N. Zhu, Chem. Eur. J. 2001, 7, 41804190.
10. 3a and 3b were synthesized by treating and Pt(5, 5’-dtbPy)(Cl)2 and Lm-H2 in 1:4 molar ratio in 46% and 62% yield, respectively.
11. The ratio of diffusion coefficients for 1a and 2a has been determined to be 1.09 by pulsed gradient NMR spectroscopy, consistent with their trimeric and tetrameric structure.
12. Lee, S.J., Hu, A., Lin, W., J. Am. Chem. Soc. 2002, 124, 1294812949.
13. The dihedral angle between the naphthyl groups is governed by the R groups (see Scheme 1) in the 2, 2'-positions.
14. Lee, S.J., Luman, C.R., Castellano, F.N., Lin, W., Chem. Commun. 2003, 21242125.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed