Accession Number:
ADA250923
Title:
New Applications of Ionization and Fluorescence Techniques for Detection and Characterization of Open-Shell Organometallics in the Gas Phase
Descriptive Note:
Technical rept.
Corporate Author:
STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
Personal Author(s):
Report Date:
1992-06-01
Pagination or Media Count:
32.0
Abstract:
Recent advances are discussed in the development of electronic spectroscopic probes for the study of excited-state structure and photodissociation dynamics of gas-phase organometallics. Because of the short time - scale for intermolecular energy transfer within van der Waals clusters, the UV photodissociation dynamics of cluster-bound transition metal carbonyls differs considerably from the photodissociation dynamics of the naked species in the gas phase. It is therefore possible to employ multiphoton ionization to produce cluster-bound metal carbonyl photoions in high yield. Resonant photoionization accomplished with tunable lasers and mass-resolved detection allow one to probe the excited states of both closed-shell and open-shell neutral organometallics. Finally, a time-resolved two-laser technique employing fluorescent detection of atomic photoproducts is described. This technique allows one to study photodissociation dynamics of organometallics with a temporal resolution competitive with the fastest transient absorption techniques, and a level of sensitivity which is far superior.
Descriptors:
- *PHOTODISSOCIATION
- *DETECTION
- *ABSORPTION
- *FLUORESCENCE
- *ORGANOMETALLIC COMPOUNDS
- *IONIZATION
- DYNAMICS
- NEUTRAL
- MASS
- ENERGY
- RESOLUTION
- STRUCTURES
- ENERGY TRANSFER
- LASERS
- SENSITIVITY
- PHASE
- TIME
- SCALE
- YIELD
- TRANSITIONS
- TRANSFER
- STOICHIOMETRY
- VANS
- SPECTROSCOPY
- TRANSITION METALS
- PROBES
- METALS
- METAL CARBONYLS
- TRANSIENTS
- ELECTRONICS
Subject Categories:
- Inorganic Chemistry
- Organic Chemistry
- Optics
- Nuclear Physics and Elementary Particle Physics