๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

UV-excited transient raman spectra and the co stretching frequencies of the lowest excited triplet state of benzophenone

โœ Scribed by Tahei Tahara; Hiro-o Hamaguchi; Mitsuo Tasumi

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
462 KB
Volume
152
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

โœฆ Synopsis

Transient resonance Raman spectra of T, benzophenone (BP) and its cal-bonyl-'KO-substltuted analogue were measured with 355 nm excitation which is in rcsonancc with a triplet-triplet (T,,.+T,) transition in the ultraviolet. The intensity of the CO stretch band was greatly enhanced under this resonance condition. Reliable values of the T, CO stretching frequency were obtained including the solvent shifts. It is concluded that the solvent dependence of the photochemical reactivity of BP is not primarily due to the solvent-induced structural changes in the T, state. The character ofthe two chfferent T-T transltions (T,,-T, and T,, +T, ) is discussed in relation to the observed Raman spectral changes with different resonance conditions.

๐Ÿ“œ SIMILAR VOLUMES

The Dynamics of Populating The Lowest Tr
The Dynamics of Populating The Lowest Triplet State Of Benzophenone Following Singlet Excitation
โœ Robin M. Hochstrasser; Hanspeter Lutz; Gary W. Scott ๐Ÿ“‚ Article ๐Ÿ“… 1974 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 639 KB

Measurements of the build-up of triplet-triplet absorption at 5300 A have been made during and subsequent to the excitation of benzophenone by 5 psec pulses of 3545 A radiation (frequency tripled Nd\*: glass fundamental). The data were fitted to a simple model that included the finite gaussian pulse

Time-resolved resonance Raman spectra of
Time-resolved resonance Raman spectra of octaethylporphinato copper(II) in the lowest excited triplet state
โœ Motoko Asano-Someda; Katsuhiro Aoyagi; Teizo Kitagawa ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 491 KB

Time-resolved resonance Raman spectra were observed with the pump/probe technique using two 7 ns pulsed lasers for octaethylporphinato Cu(II) [(OEP)Cu] and its isotopomers (OEP-meso-d 4 and OEP-lSN) in the lowest excited triplet state. Raman bands were assigned on the basis of depolarization ratios

The resonance Raman spectrum of tetramet
The resonance Raman spectrum of tetramethylbutadiene in its lowest excited triplet state
โœ R. Wilbrandt; F.W. Langkilde ๐Ÿ“‚ Article ๐Ÿ“… 1987 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 551 KB

The resonance Raman spectrum of tetramethylbutadiene in its lowest excited triplet state, with a reported lifetime of 80 ns, is presented. The triplet state was produced by laser flash photolysis using acetone as sensitizer in acetonitrile.

The lowest triplet state of CrO2Cl2. Emi
The lowest triplet state of CrO2Cl2. Emission and excitation spectra
โœ C.L. Lasko; R.M. Miller; D.S. Tinti ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 509 KB

The emission and excitation spectra at 1.4 K of solid neat CrOrClr, Cr02C12 in Ccl, and Cr02C12 in SnCI, are reported and analyzed. The emission in the three systems is assigned as phosphorescence from the CrOrClr moiety based on the vibronic analyses, measured lifetimes and ODMR activity.