Rotational relaxation and triplet‐state effects in the cw dye laser

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

doi:10.1063/1.1654405

Rotational relaxation and triplet‐state effects in the cw dye laser

Applied Physics Letters ◽

10.1063/1.1654405 ◽

1972 ◽

Vol 21 (8) ◽

pp. 345-348 ◽

Cited By ~ 19

Author(s):

A.E. Siegman ◽

D.W. Phillion ◽

D.J. Kuizenga

Keyword(s):

Triplet State ◽

Dye Laser ◽

Rotational Relaxation

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Study of Excitation Transfer in a Flowing Helium Afterglow Pumped with a Tuneable Dye Laser. II. Measurement of the Rate Coefficient for the Rotational Relaxation of He2(3p 3Πg)

The Journal of Chemical Physics ◽

10.1063/1.1678223 ◽

1972 ◽

Vol 57 (12) ◽

pp. 5317-5321 ◽

Cited By ~ 17

Author(s):

C. B. Collins ◽

B. W. Johnson

Keyword(s):

Rate Coefficient ◽

Excitation Transfer ◽

Dye Laser ◽

Rotational Relaxation

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Rotational diffusion and triplet state processes in dye laser solutions

The Journal of Chemical Physics ◽

10.1063/1.1682572 ◽

1974 ◽

Vol 61 (9) ◽

pp. 3828-3839 ◽

Cited By ~ 24

Author(s):

D. W. Phillion ◽

D. J. Kuizenga ◽

A. E. Siegman

Keyword(s):

Triplet State ◽

Rotational Diffusion ◽

Dye Laser

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Direct determination of triplet state influence on CW dye laser action – a new technique for intracavity absorption measurements

Optics Communications ◽

10.1016/s0030-4018(98)00625-7 ◽

1999 ◽

Vol 160 (1-3) ◽

pp. 162-174 ◽

Cited By ~ 1

Author(s):

E. Thiel

Keyword(s):

Triplet State ◽

Laser Action ◽

Direct Determination ◽

Dye Laser ◽

New Technique ◽

A New Technique ◽

Absorption Measurements

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Phosphorescence of protein-bound eosin and erythrosin. A possible probe for measurements of slow rotational mobility

Biochemical Journal ◽

10.1042/bj1830561 ◽

1979 ◽

Vol 183 (3) ◽

pp. 561-572 ◽

Cited By ~ 78

Author(s):

P B Garland ◽

C H Moore

Keyword(s):

Triplet State ◽

Ground State ◽

Relaxation Times ◽

Anisotropy Parameter ◽

Delayed Fluorescence ◽

Rotational Relaxation ◽

Rotational Mobility ◽

Long Wavelength ◽

Radiative Transitions ◽

Highly Sensitive

We used a pulsed dye laser working at 540 nm to excite triplet-state formation of eosin and erythrosin, either bound or unbound to bovine serum albumin, in aqueous solution anaerobically at pH 8 and 20-22 degrees C. Delayed emission from radiative transitions of the triplet state was readily detectable, both as delayed fluorescence and as red phosphorescence. Detection of the triplet state by measurement of phosphorescence at 645 nm upwards was at least 100-fold more sensitive than by absorbance measurements of ground-state depletion at 500 nm. When immobilized in poly(methyl methacrylate), the phosphorescence of eosin and erythrosin was polarized with an anisotropy parameter [Jablonski (1961) Z. Naturforsch. A16, 1-4] of about 0.25. The phosphorescence of erythrosin is sufficiently intense to be distinguishable from the long-wavelength end of fluorescence under conditions of continuous rather than pulsed excitation. Our observations suggest that phosphorescence depolarization of eosin or erythrosin probes could be used as a highly sensitive method of measuring rotational relaxation times in region from 10(-5) to 10(-3) s, such as those of the uniaxial rotation of membrane proteins.

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A nitroreductase-activatable near-infrared theranostic photosensitizer for photodynamic therapy under mild hypoxia

Chemical Communications ◽

10.1039/d0cc02019b ◽

2020 ◽

Vol 56 (43) ◽

pp. 5819-5822

Author(s):

Jing Zheng ◽

Yongzhuo Liu ◽

Fengling Song ◽

Long Jiao ◽

Yingnan Wu ◽

...

Keyword(s):

Photodynamic Therapy ◽

Triplet State ◽

Near Infrared ◽

Mild Hypoxia

In this study, a near-infrared (NIR) theranostic photosensitizer was developed based on a heptamethine aminocyanine dye with a long-lived triplet state.

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