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Volumn 107, Issue 22, 2003, Pages 4347-4353

Detailed picosecond Kerr-gated time-resolved resonance Raman spectroscopy and time-resolved emission studies of merocyanine 540 in various solvents

Author keywords

[No Author keywords available]

Indexed keywords

COOLING; EMISSION SPECTROSCOPY; HYDROGEN BONDS; MICELLES; OPTICAL KERR EFFECT; POLYCYCLIC AROMATIC HYDROCARBONS; RAMAN SPECTROSCOPY; SOLVENTS; THERMAL DIFFUSION; VISCOELASTICITY;

EID: 0037834637     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp027343z     Document Type: Article
Times cited : (28)

References (51)
  • 1
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    • Dragsten, P. R.; Webb, W. W. Biochemistry 1978, 24, 5228. Easton, T. G.; Valinsky, J. E.; Reich, E. Cell 1978, 13, 476.
    • (1978) Biochemistry , vol.24 , pp. 5228
    • Dragsten, P.R.1    Webb, W.W.2
  • 2
  • 4
    • 0037772232 scopus 로고
    • Selber, F. Photochem Photobiol. 1987, 46, 71. Danilatou, V.; Lydaki, E.; Dimitriou, H.; Papazoglou, T.; Kalmanti, M. Leuk. Res. 2000, 24, 427.
    • (1987) Photochem Photobiol. , vol.46 , pp. 71
    • Selber, F.1
  • 21
    • 0038109779 scopus 로고    scopus 로고
    • note
    • Ground-state structure of MC540 was carried out using AM1 semiempirical calculations using the commercial package Titan, 1999 Wavefunction, Inc., Irvine, CA. The structure was allowed to converge and a single-point calculation carried out to obtain the molar volumes.
  • 22
    • 0037772224 scopus 로고    scopus 로고
    • note
    • The cis isomer of MC540 is known to possess a transient absorption spectrum with a maximum that is red-shifted with respect to the trans isomer, see ref 7.
  • 23
    • 0038786634 scopus 로고    scopus 로고
    • note
    • Although it was possible to collect what appeared to be a time-resolved rR spectrum of the first-excited trans state, it did in fact mirror too closely the ground-state trans spectrum obtained using the negative time delay. The spectrum collected at long time delays (∼2 ns), which was first identified as the ground-state cis isomer, turned out to be the inverse mirror image of the ground-state trans isomer. It is known that the cis isomer is photolabile and so the spectrum is likely to be the result of over subtraction of the negative time delay data.
  • 28
    • 0542375725 scopus 로고    scopus 로고
    • In other cases ground-state and transient rR bands have been shown to be sensitive to soluie-solvent interactions and manifest in alterations in shifts and band intensities; see for example: Zhao, X.; Kitagawa, T. J. Roman. Spectrosc. 1998, 29, 773. Treffert-Ziemelis, S. M.; Kincaid, J. R. J. Roman Spectrosc. 1994, 25, 893.
    • (1998) J. Roman. Spectrosc. , vol.29 , pp. 773
    • Zhao, X.1    Kitagawa, T.2
  • 29
    • 84986754947 scopus 로고
    • In other cases ground-state and transient rR bands have been shown to be sensitive to soluie-solvent interactions and manifest in alterations in shifts and band intensities; see for example: Zhao, X.; Kitagawa, T. J. Roman. Spectrosc. 1998, 29, 773. Treffert-Ziemelis, S. M.; Kincaid, J. R. J. Roman Spectrosc. 1994, 25, 893.
    • (1994) J. Roman Spectrosc. , vol.25 , pp. 893
    • Treffert-Ziemelis, S.M.1    Kincaid, J.R.2
  • 31
    • 0001552461 scopus 로고    scopus 로고
    • In this recent study the empirical polarity factor ET(30) for this micelle was estimated at 43.8, which is similar to a mixture of 5% water and 95% dioxane, see: Mandai, D.; Kumar, S.; Sukul, D.; Bhattacharyya, K. J. Phys. Chem. A 1999, 103, 8156.
    • (1999) J. Phys. Chem. A , vol.103 , pp. 8156
    • Mandai, D.1    Kumar, S.2    Sukul, D.3    Bhattacharyya, K.4
  • 35
    • 0037772210 scopus 로고    scopus 로고
    • note
    • Because of the difficulty in carrying out the experiment to obtain the cis isomer fluorescence, the real data spectra (as shown) contained a poor signal-to-noise ratio. For a better visualization of the bands the fitted spectra are hence shown as well.
  • 40
    • 0038109762 scopus 로고    scopus 로고
    • note
    • 2 and the Lippert-Mataga solvent polarity factor (Δf) for linear alcohols only. Thus, it is feasible that there also occurs electronic-state potential energy well relaxation in MC540 following initial photoexcitation.
  • 42
    • 0035909761 scopus 로고    scopus 로고
    • A similar approach has been used to obtain the reorganization dynamics of Rhodamine 6G in alcohols, see: Dela Cruz, J. L.; Blanchard, G. J. J. Phys. Chem. A 2001, 105, 9328. Gumy, J.-C.; Vauthey, E. J. Phys. Chem. 1996, 100, 8628.
    • (2001) J. Phys. Chem. A , vol.105 , pp. 9328
    • Dela Cruz, J.L.1    Blanchard, G.J.2
  • 43
    • 33751024160 scopus 로고    scopus 로고
    • A similar approach has been used to obtain the reorganization dynamics of Rhodamine 6G in alcohols, see: Dela Cruz, J. L.; Blanchard, G. J. J. Phys. Chem. A 2001, 105, 9328. Gumy, J.-C.; Vauthey, E. J. Phys. Chem. 1996, 100, 8628.
    • (1996) J. Phys. Chem. , vol.100 , pp. 8628
    • Gumy, J.-C.1    Vauthey, E.2
  • 45
    • 0038109759 scopus 로고    scopus 로고
    • note
    • This value is only an estimate because the expression used is oversimplified and does not take into account the frictional boundary factor (f) or the solute molecular shape factor (S). It is conceivable that the "stick" limit J is high for MC540 in protic solvents because H-bonding solvents will interact strongly with the molecule. It should also be noted that because of the oversimplification of the DSE expression, the derived microviscosity value is only an approximation and should not be taken as definitive.
  • 48
    • 4243221808 scopus 로고
    • Sheppard, S. E.; Newsome, P. T. J. Am. Chem. Soc. 1942, 64, 2941. Förster, T. H. Z. Electrochem. 1939, 45, 572.
    • (1939) Z. Electrochem. , vol.45 , pp. 572
    • Förster, T.H.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.