✦ LIBER ✦

Picosecond rotational diffusion in kinetic and steady state fluorescence spectroscopy

✍ Scribed by G. Porter; P.J. Sadkowski; C.J. Tredwell

Publisher: Elsevier Science
Year: 1977
Tongue: English
Weight: 498 KB
Volume: 49
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(77)87005-x

No coin nor oath required. For personal study only.

✦ Synopsis

The rotational diffusion time constants of tetrachlorotetraiodotluorescein in a series of low viscosity, hydrogen bonding solvents have been determined by picosecond time-resolved fluorescence depolarisation spectroscopy. Steady state measurements of this dye and rhodamine 6G have been used to obtain results of comparable accuracy to the kinetic technique, provided that the fluorescence lifetimes are known. Data from both techniques indicate that Stokes-Einstein behaviour holds at low viscosities, but that in the higher viscosity solvents rotation times are longer than predicted.

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