It is shown that the long-lived transient absorption which is observed when solutions of cryptocyanine and DDI (I, I'-diethyl-2,2'-dicarbocyanine iodide) in methanol und other alcohols are exposed to nanosecond ruby laser pulses arises from a photoproduct whose formation requires consecutive absorpt
A new transient absorption spectrum observed in the flash photolysis of thiophene
โ Scribed by S.L.N.G. Krishnamachari; T.V. Venkitachalam
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 218 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
In the f&h photolysis of thiophene diluted with argon. a transient absorption spectrum in the region 3770 A to 4170 A has been observed_
The new absorption spectrum which consists of about 30 narrow and sharp red degraded bands could be analyzed into an electronic system with the origin band at 4113.8 A. The bands could be tentatively assigned to the C4H3 radical.
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The ultraviolet absorption spectrum of the neopentylperoxy radical, (CH3)3CCH202 (or C5HI1O2), and the kinetics of its self-reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross-section at 250 nm was determined to be 0 ~~~, , 0 ~( 2 5 0
The ultraviolet absorption spectrum of the chloroethylperoxy radical, CH2ClCH202, and the kinetics of its self-reaction have been studied in the gas phase using a flash photolysis technique. The room temperature absorption cross section at 250 nm was determined to be bc~~ac~,o~ ( 250nm) = ( 3.64 5 0
Absolute rate constant& k, of the reaction OH + HN03 were determined using a puked laser photolyskresonance ab\_ sorption technique\_ The measured value in cm3 mol-' s-l at 230. lolo k(l-16 Torr HN03) = 7.57 + 0.64. k(S00 Torr N2) = 7.20 f 0.66 and k(600 Torr SFe) = 8.37 f 0.45. indimtc that any pre
A novel emission spectrum extending from 5500 to 8600 A has been observed during the gas-phase reaction of F2 with CS2. Long progressions in the lower-state (presumably the ground-state) bending frequency and shorter progressions in a ground-state stretching frequency were observed. A partial vibrat