Hostname: page-component-77c89778f8-m42fx Total loading time: 0 Render date: 2024-07-23T23:42:22.033Z Has data issue: false hasContentIssue false
  • English
  • Français

Optical Activity and Order in Luminescent Langmuir-Blodgett Poly(ρ-Phenylene Vinylene) Films

Published online by Cambridge University Press:  10 February 2011

A. Marletta ,
F.E.G. Guimãraes ,
D. Gonçalves ,
P.T. Campana ,
O.R. Nascimento ,
O.N. Oliveira Jr.  and
R.M. Faria
A. Marletta
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
F.E.G. Guimãraes
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
D. Gonçalves
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
P.T. Campana
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
O.R. Nascimento
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
O.N. Oliveira Jr.
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
R.M. Faria
Affiliation:
Instituto de Física de Sdo Carlos, Universidade de São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil. e-mail: gdebora@if.sc.usp.br
Get access

Abstract

Langmuir-Blodgett (LB) PPV films of poly(ρ-phenylene vinylene) (PPV) have been obtained using a mixture of a PPV precursor, poly(xylylidene tetrahydrothiophenium chloride) (PTHT), with the sodium salt of dodecylsulfonic acid (DBSA) as the spreading solution. Spincoated films were prepared in order to compare their properties with those of LB films. A large circular dichroism was observed for LB films but not for spin-coated ones. Optical activity of PPV films was characterized by circular dichroism technique, while optical properties were evaluated by optical absorption and luminescence measurements at various temperatures. Overall, the results obtained allowed us to conclude that the layer-by-layer LB process yields a high degree of molecular order in the PPV films with low interchain interaction. Polarized absorption and circular dichroism measurements demonstrate a preferential chain orientation along the dipping direction in the LB processing. The origin of the CD in the PPV-LB can be ascribed to convenient packing of individual monolayers given by the Z-type deposition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 560: Symposium E – Luminescent Materials , 1999 , 309
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Zhang, C., Braun, D., and Heeger, A.J., J. Appl. Phys 73, p. 5177 (1993).Google Scholar
2. Bradley, D.D.C., J.Phys. D: Appl. Phys. 20, p. 1389 (1987).Google Scholar
3. Pichler, K., Halliday, D.A., Bradley, D.D.C., Burn, P.L., Friend, R.H. and Holmes, A.B., J. Phys.: Condens. Matter 5, p. 7155 (1993).Google Scholar
4. Herold, M., Gmeiner, J., Riepß, W. and Schwoerer, M, Synthetic Metals 76, p. 109 (1996); D.A. Halliday, P.L. Burn, R.H. Friend, D.D.C. Bradley and A.B. Holmes, Synthetic Metals 55-57, p. 954 (1993).Google Scholar
5. Obrzut, J. and Karasz, F.E., J. Chem. Phys. 87, p. 2349 (1987).Google Scholar
6. Brazovskii, S., Kirova, N. and Bishop, A.R., Optical Materials 9, p. 465 (1998); Y. Shimoi and S. Abe, Synthetic Metals 78, p. 219 (1996).Google Scholar
7. Heller, C.M., Campbell, I.H., Laurich, B.K., Smith, D.L., Burn, D.D.C., Feraris, J.P., Muller, K., Phys. Rev. B, 54 (1996) 5516.Google Scholar
8. Jenekhe, S. A., Osaheni, J. A., Science 265, p. 765–768 (1994).Google Scholar
9. Elsenbaumer, R.L., Eckhardt, H., Iqbal, Z., Toth, J. and Baughman, R.H., Mol. Cryst. Liq. Cryst. 118, 111 (1985); E. Peeters, A. Delmotte, R.A.J. Janssen and E.W. Maijer, Adv. Matter. 9, p. 493 (1997).Google Scholar
10. Langeveld-Voss, B.M.W., Peeters, E., Janssen, R. A.J. and Meijer, E.W., Synthetic Metals 48, p 611–614 (1997); S.D.D.V. Rughooputh, S Hotta, A.J. Heeger, and F. Wudl, J. Polym. Sci.: Part B: Polym. Phys. 25, p. 1071 (1987);Google Scholar
11. Viswanathan, R., Zasadzinski, J. A. and Schwartz, D.K., Nature, 368, p. 440 (1994); G. J Ashwell, P.D. Jackson and W.A. Crossland, Nature, 368, p. 438 (1994).Google Scholar