Rotation of PRODAN in excited state

• Autorzy: Tomin V I
• Języki publikacji: EN

Abstrakty

EN

Instant spectra and anisotropy kinetics of PRODAN luminescence in different ranges of spectra has been studied upon excitation by picosecond pulses. Instant spectra of luminescence reveal time dependent Stokes shift having intermolecular nature as its characteristic time correlates with dielectric relaxation time of solvent. The mean Brownian rotation time for the curves obtained shows complex character of spectral dependence with maximum ~39 ns near maximum of luminescence intensity and drops down to 15 ns on the edges of the spectrum. An explanation is based on a treatment of intermolecular energy conversion into thermal movement of molecules during relaxation in excited state. Calculations using hydrodynamic model show “stick” boundary conditions for solutes: rotational volumes correspond to solute together with molecules of the first coordinative sphere filled by solvent.

Słowa kluczowe

EN

PRODAN; luminescence; rotation; excited state; charge transfer states; conformers; relaxation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2006
• Tom: Vol. 36, nr 4
• Strony: s. 523--528
• Opis fizyczny: Bibliogr. 19 poz., tab., wykr.

Twórcy

autor

Tomin V I

• Institute of Physics, Pomeranian University, Arciszewskiego 22B, 76-200 Słupsk, Poland

Bibliografia

• [1] GALLEY W.C., PURKEY R.M., Role of heterogeneity of the solvation site in electronic spectra in solution, Proceedings of the National Academy of Sciences USA 67(3), 1970, pp. 1116–21.
• [2] RUBINOV A.N., TOMIN V.I., Bathochromic luminescence in solutions of organic dyes at low temperatures, Optics and Spectroscopy 29(6), 1970, pp. 578-80 (original: Optika i Spektroskopiya, 29(6), 1970, pp. 1082–6).
• [3] WEBER G., SHINITSKY M., Failure of energy transfer between identical aromatic molecules on excitation at the long wave edge of the absorption spectrum, Proceedings of the National Academy of Sciences USA 65(4), 1970, pp. 823–30.
• [4] NEMKOVICH N.A., RUBINOV A.N., TOMIN V.I., Topics in Fluorescence Spectroscopy, [Ed.] J.R. Lakowicz, Vol. 2, Principles, Plenum Press, New York 1991, p. 367.
• [5] RUBINOV A.N., TOMIN V.I., BUSHUK B.A, Kinetic spectroscopy of orientational states of solvated dye molecules in polar solutions, Journal of Luminescence 26(4), 1982, pp. 377–91.
• [6] MAZURENKO Yu.T., Broadening of the electronic spectra of complex molecules in a polar medium, Optics and Spectroscopy 33(1), 1972, pp. 22–6 (original: Optika i Spektroskopiya 33(1), 1972, pp. 42–50).
• [7] DEMCHENKO A.P., The red-edge effects: 30 years of exploration, Journal of Luminescence 17(1), 2002, pp. 19–50.
• [8] LIPPERT E., RETTIG W., BONACIC-KOUTECKY V., HEISEL F., MIEHE J.A., Photophysics of internal twisting, [In] Advances in Chemical Physics, [Ed.] I. Prigogine, S.A. Rise, Vol. 68, Wiley 1987, p. 1.
• [9] GRABOWSKI Z.R., ROTKIEWICZ K., RETTIG W., Structural changes accompanying intramolecular electron transfer: focus on twisted intramolecular charge-transfer states and structures, Chemical Reviews 103(10), 2003, pp. 3899–4032.
• [10] TOMIN V.I., BROZIS M., HELDT J., The red-edge effects in laurdan solutions, Zeitschrift für Naturforschung 58a, 2003, pp. 109–17.
• [11] TOMIN V.I., HUBISZ K., Anomalous inhomogeneous broadening of the electronic spectra of N,N-dimethylaminobenzonitrile in solutions, Journal of Applied Spectroscopy 70(5), 2003, pp. 804–6.
• [12] TOMIN V.I., HUBISZ K., MUDRYK Z., Anomalous inhomogeneous broadening of electronic spectra of molecules with internal charge transfer, Zeitschrift für Naturforschung 58a, 2003, pp. 529–36.
• [13] TOMIN V., HUBISZ K., Band broadening in the electronic spectra of 4-dimethylaminobenzonitrile in polar solvents, Russian Journal of Physical Chemistry 78(7), 2004, p. 1114.
• [14] KAWSKI A., KUKLIŃSKI B., BOJARSKI P., Thermochromic shifts of apsorption and fluorescence spectra and excited state dipole moment of PRODAN, Zeitschrift für Naturforschung 55a, 2000, pp. 550–4.
• [15] LAKOWICZ J., Principles of Fluorescent Spectroccopy, Springer 2006.
• [16] TOMIN V., HUBISZ K., Inhomogeneous spectral broadening and the decay kinetics of the luminescence spectra of prodan, Optics and Spectroscopy 101(1), 2006, pp. 98–104.
• [17] NEMKOVICH N.A., RUBINOV A., Spectral inhomogeneity and wavelength-dependent rotation of probe molecules in membranes, Journal of Fluorescence 5(3), 1995, pp. 285–94.
• [18] ZEVANDROV N.D., NIKOLAEV V.P., Doklady Academy Nauk USSR 113(5), 1957, p. 1025.
• [19] LAKOWICZ J.R., Time-dependent rotational rates of excited fluorophores: A linkage between fluorescence depolarization and solvent relaxation, Biophysical Chemistry 19(1), 1984, pp. 13–23.