Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

The Spectroscopic Studies on the Aggregation Behavior of Cyanine Dyes

  • Published : 1998.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

Aggregations of 1,1'-diethyl-2,2'-carbocyanine iodide (DCI) and 1,1'-diethyl-2,2'-dicarbocyanine iodide (DDT) in aqueous solution have been investigated by the steady-state absorption spectroscopy. The equilibrium constants for dimerization of DCI and DDT are found to be $(9.8{\pm}0.5){\times}10^4 \;and\; (1.6{\pm}0.5){\times}10^5\; M^{-1}$, respectively, at 293 K. The enthalpy changes for the dimerization of DCI and DDT are -6.7±0.7 and -7.7±0.8 kcal/mol, respectively. The results show that the dispersion force plays an important role in the aggregation of DCI and DDT in aqueous solution. The absorption bandwidth of DCI/ethanol system has been measured as a function of temperature, providing the evidence for no strong interaction between DCI and solvent molecules. The participation of hydrophobic force in driving the aggregation is suggested. For the first time, DCI in aqueous solution is found to form a new aggregate which has both J- and H- bands.

Keywords

References

  1. In The photosynthetic bacteria Feher, G.;Okamura, M. Y.;Clayton, R. K.(ed.);Sistrom, W. F.(ed.)
  2. Photo. Sci. Eng. v.18 Gilman, P. B.
  3. Chem. Phys. Lett. v.126 Wang, Y.
  4. J. Phys. Chem. v.87 Liang, Y.;Ponte Goncalves, A. M.;Negus, D. K.
  5. J. Phys. Chem. v.89 Liang, Y.;Ponte, Goncalves, A. M.
  6. J. Phys. Chem. v.90 Anfinrud, P. A.;Causgrove, T. P.;Struve, W. S.
  7. J. Phys. Chem. v.88 Anfinrud, P. A.;Crackel, R. L.;Struve, W. S.
  8. Chem. Phys. Lett. v.120 no.473 Crackel, R. L.;Struve, W. S.
  9. Opt. Spectrosc v.10 Arvan, Kh. L.;Zaitseva, N. E.
  10. J. Phys. Chem. v.92 Valdes-Aguilera, O.;Neckers, D. C.
  11. Acc. Chem. Res. v.22 Valdes-Aguilera, O.;Neckers, D. C.
  12. J. Am. Chem. Soc. v.109 Sielcken, O. E.;van Tillborg, M.;Roks, M. F. M.;Hendriks, R.;Drenth, W.;Nolts, R. J. M.
  13. J. Phys. Chem. v.69 West, W.;Pearce, S.
  14. J. Chem. Phys. v.28 McRae, E. G.;Kasha, M.
  15. In Physical Processes in Radiation Biology McRae, E. G.;Kasha, M.;Augenstein, L.(ed.);Rosenberg, B.(ed.);Mason, S. F.(ed.)
  16. Laser Dyes Maeda, M.
  17. J. Phys. Chem. v.93 Chen, S.-Y.;Horng, M.-L.;Quitevis, E. L.
  18. J. Phys. Chem. v.71 Emerson, E. S.;Conlin, M. A.;Rosenoff, A. E.;Norland, K. S.;Rodriguz, H.;Chin, D.;Bird, G. R.
  19. J. Phys. Chem. v.79 Graves, R. E.;Rose, P. I.
  20. Chem. Phys. Lett. v.83 Kopainsky, B.;Hallermeier, J. K.;Kaiser, W.
  21. J. Chem. Pyhs. v.20 Lax, M.
  22. J. Chem. Phys. v.96 Yu, J.;Berg, M.
  23. Phys, Rev. v.40 Spano, F. C.;Mukamel, S.
  24. J. Phys. Chem. v.96 Carpenter, M. A.;Willand, C. S.;Penner, T. L.;Willwams, D. J.;Mukamel, S.
  25. Appl. Phys. Lett. v.63 Sasaki, F.;Kobayashi, S.