Triplet‐state ESR of rhodamine 6G during laser irradiation

1973 ◽  
Vol 59 (4) ◽  
pp. 2156-2157 ◽  
Author(s):  
Mikio Yamashita ◽  
Hiroshi Kashiwagi
Keyword(s):  
Triplet State ◽  
Laser Irradiation ◽  
Rhodamine 6G

Optical saturation and quenching effects in the triplet state of Rhodamine 6G at 77.deg.K

1974 ◽  
Vol 78 (20) ◽  
pp. 2006-2009 ◽  
Author(s):  
Mikio Yamashita ◽  
Hiroshi Kashiwagi
Keyword(s):  
Triplet State ◽  
Rhodamine 6G

Laser-Induced Fluorescence of Rhodamine 6G Cations in the Gas Phase: A Lower Bound to the Lifetime of the First Triplet State

2010 ◽  
Vol 114 (17) ◽  
pp. 5509-5514 ◽  
Author(s):  
Mattias Kordel ◽  
Detlef Schooss ◽  
Christian Neiss ◽  
Lars Walter ◽  
Manfred M. Kappes
Keyword(s):  
Lower Bound ◽  
Triplet State ◽  
Gas Phase ◽  
Rhodamine 6G ◽  
Laser Induced Fluorescence

scholarly journals The Influence of Detergents on the Bleaching Process, Laser Properties of Rhodamine 6G and B in Aqueous Solution

1979 ◽  
Vol 34 (5) ◽  
pp. 551-556
Author(s):  
Z. Konefał
Keyword(s):  
Aqueous Solution ◽  
Triplet State ◽  
Rhodamine 6G ◽  
Quantum Yields ◽  
Generation Efficiency ◽  
Bleaching Process ◽  
Relative Quantum ◽  
Aqueous Detergent ◽  
Detergent Solutions

Abstract The bleaching and the laser properties of Rhodamine 6G and B in aqueous detergent solutions have been studied. The rate of bleaching depends on the concentration of the detergent. The relative quantum yields of the bleaching process for these solutions have been determined. It is found that the influence of detergents on the generation efficiency depends on the type of dye employed. From the results obtained it is concluded that the detergents influence the population of the triplet state of the lasing dye.

scholarly journals More Than 50-Fold Enhanced Nonlinear Optical Response of Porphyrin Molecules in Aqueous Solution Induced by Mixing Base and Organic Solvent

2021 ◽  
Vol 11 (11) ◽  
pp. 4892
Author(s):  
Satoshi Imura ◽  
Takayoshi Kobayashi ◽  
Eiji Tokunaga
Keyword(s):  
Aqueous Solution ◽  
Triplet State ◽  
Laser Irradiation ◽  
State Formation ◽  
Continuous Wave ◽  
Excited State Absorption ◽  
Solvent Mixture ◽  
Saturable Absorption ◽  
Mixture Ratio ◽  
Quenching Effect

The difference absorption spectrum (DAS) of porphyrin molecules (tetraphenyl-porphyhrin sulfonic acid, TPPS) in aqueous solution induced by continuous wave laser irradiation has been reported previously. It was interpreted that the DAS was caused by the formation of TPPS aggregates induced by laser irradiation. However, transient spectra similar in their shape have already been reported and are attributed to the excited-state absorption and saturable absorption (SA) effects due to the triplet state formation in TPPS. In the present study, we investigated the triplet quenching effect by O2 on the DAS of TPPS aqueous solution and revealed that it originated from the triplet state formation. We also found that mixing the appropriate amount of MeOH and NaOH in TPPS aqueous solution increased its absorbance change by more than 50 times. This may be due to the decrease in dissolved oxygen concentration by mixing them. This result suggests the possibility of controlling the performance of NLO materials by adjusting the solvent mixture ratio and base/acid concentration.

Quenching of rhodamine-6G triplet state by inorganic ions in aqueous solutions

1983 ◽  
Vol 39 (1) ◽  
pp. 765-768 ◽  
Author(s):  
G. V. Zakharova ◽  
V. E. Korobov ◽  
V. V. Shabalov ◽  
A. K. Chibisov
Keyword(s):  
Aqueous Solutions ◽  
Triplet State ◽  
Rhodamine 6G ◽  
Inorganic Ions

Chronic Laser Exposure Effects on Rabbit Retina

1972 ◽  
Vol 30 ◽  
pp. 54-55
Author(s):  
Burton B. Silver ◽  
Theodore Lawwill
Keyword(s):  
Laser Irradiation ◽  
Laser Light ◽  
Broad Band ◽  
Argon Laser ◽  
Atropine Sulfate ◽  
Ultrastructural Changes ◽  
Laser Exposure ◽  
Rabbit Retina ◽  
Histological Changes ◽  
Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

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