Subnanosecond relaxation time measurements using a transient induced grating method

Phillion, D. W.; Kuizenga, D.; Siegman, A. E.

doi:10.1063/1.88362

Cited by 173 publications

(31 citation statements)

References 18 publications

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“…A similar observation in the present investigation suggests that the ADR dyes rotate as prolate models of ellipsoids. In the present study, we find the faster out-of-plane rotation in contrast to the earlier reports [7][8][9][10][11][12][13][14]16 for the following reasons. The calculated lengths of the long and short axes of the ADR molecule change on changing the substituent.…”

Section: Adrcontrasting

confidence: 85%

Fluorescence anisotropy of acridinedione dyes in glycerol: Prolate model of ellipsoid

Indirapriyadharshini

Ramamurthy

2007

J Chem Sci

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Time-dependent reorientations of resorcinol-based acridinidione (ADR) dyes in glycerol were studied using steady-state and time-resolved fluorescence studies. The difference between fluorescence anisotropy decays recorded at 460 nm when exciting at 250 nm and those obtained when exciting at 394 nm are reported. When exciting at 394 nm, the fluorescence anisotropy decay is bi-exponential, while on exciting at 250 nm a mono-exponential fluorescence anisotropy decay is observed. We interpret this in terms of different directions of the absorption dipole at 394 and 250 nm with the emission dipole respectively, which is experimentally validated and further analysed as a prolate model of ellipsoid.

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Section: Adrcontrasting

confidence: 85%

Fluorescence anisotropy of acridinedione dyes in glycerol: Prolate model of ellipsoid

Indirapriyadharshini

Ramamurthy

2007

J Chem Sci

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“…The same applies to the solution of DTDCI in methanol, for which very large orientation relaxation times are expected. 8,23 For the usual purposes, the measuring accuracy of the molecular wavenumber is very high for I-CRS. 24 In the present extreme low wavenumber limit it approaches the molecular wavenumbers investigated.…”

Section: Discussionmentioning

confidence: 99%

Determination of damped molecular rotation in the liquid phase using interferometric coherent Raman scattering

Kozich

Lau

Pfeiffer

et al. 1999

J. Raman Spectrosc.

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Extremely low wavenumber responses of 3,3 0 -diethylthiadicarbocyanine iodide (DTDCI) in methanol, neat benzene, nitrobenzene and carbon disulfide were observed with interferometric coherent Raman spectroscopy using incoherent light techniques. Strongly damped modes with transition wavenumbers around 0.5 cm −1 were observed. The close agreement of the measured damping times with known orientational relaxation times for benzene and carbon disulfide and with the calculated rotational wavenumbers of isolated molecules strongly supports the interpretation of the measured wavenumber as being correlated with the free-rotor motion of the molecules. These results are in agreement with the picture of orientational relaxation in liquids as a sequence of successive free rotations interrupted by collisions.

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“…Diffusion in some biological systems has also been investigated by Rhee et al (1984) and Stewart et al (1986), using the same technique. A similar transient grating approach has also been applied to the study of the dynamics of energy transport in molecular solids (Phillion et al, 1975;Rondelez et al, 1978b;Salcedo et al, 1978;Fayer, 1982;Lutz et al, 1981;Nelson and Fayer, 1980;Nelson et al, 1982).…”

Section: The Frs Experimentsmentioning

confidence: 95%

Tracer diffusion measurement in polymer solutions near the glass transition by forced rayleigh scattering

et al. 1987

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Forced Rayleigh scattering, a relatively recently developed optical technique, is used to measure tracer diffusion coefficients in polymersolvent mixtures near the system glass transition temperature, T,. The technique has a wider range of potential application than has yet been realized, and so is presented in some detail. The objectives were to obtain data necessary to scrutinize free volume theory, and t o understand so-called anomalous, non-Fickian diffusion effects observed by others in polymer-solvent mixtures near T,. Data on dye tracer diffusion coefficients in the systems polyvinyl acetate-toluene, polystyrenetoluene, and polystyrene-tri-m-tolyl phosphate were obtained over a polymer concentration range from infinite dilution to 96 wt. YO. Small molecule diffusion coefficients are seen to vary by as much as nine orders of magnitude to cm2/s) over this concentration range. The data are in reasonable accord with expectations based on the DudaVrentas version of free-volume theory.

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Subnanosecond relaxation time measurements using a transient induced grating method

Cited by 173 publications

References 18 publications

Fluorescence anisotropy of acridinedione dyes in glycerol: Prolate model of ellipsoid

Fluorescence anisotropy of acridinedione dyes in glycerol: Prolate model of ellipsoid

Determination of damped molecular rotation in the liquid phase using interferometric coherent Raman scattering

Tracer diffusion measurement in polymer solutions near the glass transition by forced rayleigh scattering

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