Organization of cationic porphyrins in mixed Langmuir-Blodgett films. An absorption and steady-state fluorescence study

Langmuir

Volumn 18, Issue 15, 2002, Pages 5772-5781

  Viseu, Maria Isabel ^a   Gonçalves da Silva, Amélia M ^a   Antunes, Patrícia ^a   Costa, Sílvia M B ^a  

^a INSTITUTO SUPERIOR TÉCNICO   (Portugal)

Author keywords

[No Author keywords available]

Indexed keywords

CATIONIC PORPHYRINS;

ELECTROSTATICS; FLUORESCENCE; HYDROPHILICITY; HYDROPHOBICITY; INTERFACES (MATERIALS); LANGMUIR BLODGETT FILMS; POSITIVE IONS; QUENCHING;

PORPHYRINS;

EID: 0037162574     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0117909     Document Type: Article

References (41)

1. Hoffman, B.M.; Ibers, J.A. Acc. Chem. Res. 1983, 16, 15.
2. Nevin, W.A.; Chamberlain, G.A. J. Appl. Phys. 1991, 69, 4324.
3. Norwood, R.A.; Sounik, J.R. Appl. Phys. Lett. 1992, 60, 295.
4. Kobayashi, N.; Janda, P.; Lever, A.B.P. Inorg. Chem. 1992, 31, 5172.
5. Schouten, P.G.; Warman, J.M.; Haas, M.P.; Fox, M.A.; Pan, H.L. Nature 1991, 353, 736.
6. Liu, C.Y.; Pan, H.L.; Fox, M.A.; Bard, A.J. Science 1993, 261, 897.
7. Gaines, G.L., Jr. Insoluble Monolayers at Liquid-Gas Interfaces; Interscience: New York, 1966.
8. Hann, R.A. Molecular Structure and Monolayer Properties. In Langmuir-Blodgett Films; Roberts, G.G., Ed.; Plenum Press: New York, 1990.
9. Petty, M.C. Langmuir-Blodgett Films; Cambridge University Press: Cambridge, U.K., 1996.
10. Zhang, Z.; Verma, A.L.; Yoneyama, M.; Nakashima, K.; Iriyama, K.; Ozaki, Y. Langmuir 1997, 13, 4422.
11. Zhang, Z.; Verma, A.L.; Nakashima, K.; Yoneyama, M.; Iriyama, K.; Ozaki, Y. Langmuir 1997, 13, 5726.
12. Zhang, Z.; Nakashima, K.; Verma, A.L.; Yoneyama, M.; Iriyama, K.; Ozaki, Y. Langmuir 1998, 14, 1177.
13. Verma, A.L.; Zhang, Z.; Tamai, N.; Nakashima, K.; Yoneyama, M.; Iriyama, K.; Ozaki, Y. Langmuir 1998, 14, 4638.
14. Vandevyver, M.; Barraud, A.; Raudel-Texier; Maillard, P.; Gianotti, C. J. Colloid Interface Sci. 1982, 85, 571.
15. Grüniger, H.; Möbius, D.; Meyer, H. J. Chem. Phys. 1983, 79, 3701.
16. Anikin, M.; Tkachenko, N.V.; Lemmetyinen, H. Langmuir 1997, 13, 3002.
17. Efimov, A.V.; Anikin, M.; Tkachenko, N.V.; Mironov, A.F.; Lemmetyinen, H. Chem. Phys. Lett. 1998, 289, 572.
18. Gonçalves da Silva, A.M.; Viseu, M.I.; Malathi, A.; Antunes, P.; Costa, S.M.B. Langmuir 2000, 16, 1196.
19. Gonçalves da Silva, A.M.; Viseu, M.I.; Romão, R.; Costa, S.M.B., manuscript submitted.
20. Martin, M.T.; Prieto, I.; Camacho, L.; Möbius, D. Langmuir 1996, 12, 6554.
21. Prieto, I.; Camacho, L.; Martin, M.T.; Möbius, D. Langmuir 1998, 14, 1853.
22. Prieto, I.; Martín-Romero, M.T.; Camacho, L.; Möbius, D. Langmuir 1998, 14, 4175.
23. Gonçalves da Silva, A.M.; Viseu, M.I.; Campos, C.S.; Rechena, T. Thin Solid Films 1998, 320, 236.
24. Gonçalves da Silva, A.M.; Viseu, M.I. Colloids Surf. A: Physicochem. Eng. Aspects 1998, 144, 191.
25. Viseu, M.I.; Gonçalves da Silva, A.M.; Costa, S.M.B. Langmuir 2001, 17, 1529.
26. 27-31.
27. Czikkely, V.; Försterling, H.D.; Kuhn, H. Chem. Phys. Lett. 1970, 6, 11.
28. Czikkely, V.; Försterling, H.D.; Kuhn, H. Chem. Phys. Lett. 1970, 6, 207.
29. Whitten, D.G. The Spectrum 1993, 6 (3), 1.
30. Azumi, R.; Matsumoto, M.; Kawabata, Y.; Kuroda, S.; Sugi, M.; King, L.G.; Crossley, M.J. J. Phys. Chem. 1993, 97, 12862.
31. Cantor, C.R.; Schimmel, P.R. Biophysical Chemistry. Part II. Techniques for the Study of Biological Structure and Function; W.H. Freeman and Co.: New York, 1998.
32. Chernia, Z.; Gill, D. Langmuir 1999, 15, 1625.
33. Because the transition moments lie in the plane of the porphyrin macrocycle, the formation of perfect (fully superposed) H-aggregates would imply that the macrocycles stand perpendicularly to the water surface. However, to increase the contact between the hydrophilic pyridinium groups and water, it seems more likely that, along the transition, the porphyrin rings become tilted relative to the interface (at an angle below 90°) and therefore only partially superimposed.
34. Maiti, N.C.; Mazumdar, S.; Periasamy, N. J. Phys. Chem. B 1998, 102, 1528.
35. 36 However, polydisperse H-aggregates (in terms of the number of assembled monomers) might have larger bands than the monomer band. This is a common situation, observed, e.g., with cyanines and porphyrins.
36. Kunisawa, T.; Sato, T.; Yonezawa, Y.; Popova, G.V. Thin Solid Films 1997, 311, 267.
37. 38 Our results, showing a weak fluorescence, seem to support, instead, the formation of tilted H-aggregates, where the angle between the individual transition dipole moments and the line of molecular centers would be smaller than 90° but larger than arccos(1/√3), or 57.4°.
38. McRae, E.G.; Kasha, M. J. Chem. Phys. 1958, 28, 721.
39. A slower increase in absorption is seen thereafter (for n = 7), but this could be due to a reorganization of the aggregates in the film because a larger width of the band is also observed; see Table 1.
40. Gonçalves da Silva, A.M.; Romão, R.; Viseu, M.I.; Costa, S.M.B. Instituto Superior Técnico, Lisboa, Portugal. Unpublished results.
41. Kano, K.; Fukuda, K.; Wakami, H.; Nishiyabu, R.; Pasternack, R.F. J. Am. Chem. Soc. 2000, 122, 7494.