## Recent experimental tnvesttgatrons of the popufar~on evofutron of the vibrational states of CO dduted in Ar indtcatc Ihat the rates of tbc reactions CO( 1) + CO(u) -CO(O) + CO(u + 1) \* ti Increase with u for u = l-3, and that they are approxrmatcly constant for u = 3-5. This surpnsmg and unexp
Picosecond measurements of vibrational energy decay in matrix-isolated polyatomic molecules
โ Scribed by J.B. Hopkins; P.M. Rentzepis
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 521 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
The rates of vibrational energy decay for the S2 excited state of azulene have been measured in both monatomic and polyatomic matrix media at 4 K. We find that the existence of molecular modes in the polyatomic matrix does not substantially affect the rate of energy decay within the S1 vibrational manifold of azulene. Temperature effects on vibrational energy decay rates have also been measured and the implications of the experimental details evaluated in terms of existing theoretical models.
๐ SIMILAR VOLUMES
A thermodynamic Green's function technique is successfully applied to the calculation of IVR rates of polyatonfic molecul, The energy dependence of IVR rates has interesting threshold features: rates are zero below some critical energy Ec, aJ non-zero for higher energies. This dependence can be unde
Direct picosecond time resolution of dissipative IVR is reported for the first time. For jet-cooled anthracene with Eeb = 1791 cm -\*\_ rhc urm%-zxed fluorescence displays ;t fast decay of ==75 ps\_ while the reLaxed fluorescence displays a corrc spondin!: rise. The onset for dissipative IVR is rela
Lime-resolved emission OC single vlbrarional level lluorescen~ from large matrix-isolated molecules has been observed for the firs1 IIme. Using the strucrured emrssion speclra rrom S, azulenc we have studred tie demiled pathways and dynamics of vibrarional energy relaxalion. TemperaLure and man-~x m