Anomalous broadening of DMABN electronic spectra in solutions

• Autorzy: Tomin V , Hubisz K
• Języki publikacji: EN

Abstrakty

EN

The results of spectral broadening study of electronic bands of an archetype molecule with intramolecular charge transfer in the excited state, n-dimethylaminobenzonithrile (DMABN), in polar solvents are discussed. The broadening is anomalously large, it amounts to 8000 cm–1, and manifests itself in both luminescence and excitation spectra. The explanation of the results obtained is based on treating a solution as a set of chemically identical solvates with solute in the centre, which have different energies of the pure electronic transitions. The inhomogeneity is likely to arise due to both the intermolecular effect of luminophor environment on its spectra in polar solvents and the existence of various conformers of DMABN.

Słowa kluczowe

EN

DMABN; luminescence; local-excited and charge transfer states; conformers; relaxation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2006
• Tom: Vol. 36, nr 4
• Strony: s. 475--481
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Tomin V

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

autor

Hubisz K

Bibliografia

• [1] 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, pp. 367–428.
• [2] 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.
• [3] 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).
• [4] GRABOWSKI Z.R., ROTKIEWICZ K., RETTIG W., Structural changes accompanying intramolecular electron transfer: focus on twisted intramolecular charge-transfer states and structures, Chemical Review 103(10), 2003, pp. 3899–4032.
• [5] DEMCHENKO A.P., The red-edge effects: 30 years of exploration, Journal of Luminescence 17(1), 2002, pp. 19–50.
• [6] TOMIN V.I., BROZIS M., HELDT J., The red-edge effects in laurdan solutions, Zeitschrift für Naturforschung 58a, 2003, pp. 109–17.
• [7] 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.
• [8] 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.
• [9] 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.
• [10] TOMIN V.I., HUBISZ K., KWIEK P., Properties of DMABN long-wavelength emission excited by picosecond laser pulses, Proceedings of SPIE 5849, 2005, pp. 195–8.
• [11] TOMIN V.I., HUBISZ K., KWIEK P., Polarization and kinetic properties of the luminescence of nonequilibrium forms of dimethylaminobenzonitrile, Optics and Spectroscopy 99(1), 2005, pp. 43–8.
• [12] TOMIN V.I., HUBISZ K., KVIEK P., Characteristics of long-wave luminescence of dimethylaminobenzonitrile excited by picosecond laser pulses, Russian Journal of Physical Chemistry 79(8), 2005, pp. 1347–9.
• [13] LIPPERT E., RETTIG W., BONACIC-KOUTECKY V., HEISEL F., MIEHE J.A., [In] Advances in Chemical Physics, [Eds.] I. Prigogine, S.A. Rise, Vol. 68, Wiley 1987, p. 1.
• [14] BAUMANN W., BISCHOF H., FRöHLING J.-C., BRITTINGER C., RETTIG W., ROTKIEWICZ K., Considerations on the dipole moment of molecules forming the twisted intramolecular charge transfer state, Journal of Photochemistry and Photobiology A: Chemistry 64(1), 1992, pp. 49–72.
• [15] FISZ J.J., VAN HOEK A., Picosecond emission anisotropy decays of dimethyl aminobenzonitrile, Chemical Physics Letters 270(5–6), 1997, pp. 432–42.
• [16] OKADA T., UESUGI M., KöHLER G., RECHTHALER K., ROTKIEWICZ K., RETTIG W., GRABNER G., Time-resolved spectroscopy of DMABN and its cage derivatives 6-cyanobenzquinuclidine (CBQ) and benzquinuclidine (BQ), Chemical Physics 241(3), 1999, pp. 327–37.
• [17] TOMIN V.I., BROZIS M., Semiempirical calculations of the electronic state properties of the dimethylaminobenzonitrile molecule, Russian Journal of Physical Chemistry 79(6), 2005, pp. 954–8.