Diode laser kinetic spectroscopy of formyl

Simple item page
dc.contributor.advisorCurl, Robert F., Jr.en_US
dc.creatorDane, Clifford Brenten_US
dc.date.accessioned2009-06-04T00:38:24Zen_US
dc.date.available2009-06-04T00:38:24Zen_US
dc.date.issued1988en_US
dc.description.abstractA tunable diode laser infrared high-resolution spectrometer was constructed to study the spectroscopy and kinetics of free radicals. A method for producing diode laser frequency scans which are several wavelengths long, linear in frequency, and readily and accurately calibrated from reference spectra has been devised. The laser is current scanned under computer control over short overlapping segments between each of which a temperature step is made. Each segment is then linearized and pieced together to provide a final spectral scan. High-resolution spectra of transient species were collected using either magnetic rotation spectroscopy or flash kinetic spectroscopy. The high-resolution infrared spectrum of the CH stretching fundamental of the formyl radical (HCO) was observed by means of infrared kinetic spectroscopy using 308 nm (XeCl) excimer laser flash photolysis of formaldehyde or acetaldehyde followed by diode or difference-frequency laser probing of the transient absorption. The spectra obtained were assigned and fitted with rotational, spin-rotational, and centrifugal distortion constants resulting in a v$\sb1$ band origin of 2434.48 cm$\sp{-1}$. New ground state constant are reported from a least-squares fit combining the v$\sb1$ infrared data with previous microwave and far-infrared laser magnetic resonance (FIR LMR) measurements. Fixed-frequency studies of infrared absorptions using the spectrometer allow the time-resolved investigation of chemical dynamics on submicrosecond time scales. A method of locking the diode laser output frequency to an external vacuum-spaced etalon by modulating the optical pathlength of the etalon was investigated. Using this technique, the rate constant of the reaction of HCO with O$\sb2$ was measured.en_US
dc.format.extent193 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Chem. 1988 Daneen_US
dc.identifier.citationDane, Clifford Brent. "Diode laser kinetic spectroscopy of formyl." (1988) Diss., Rice University. <a href="https://hdl.handle.net/1911/16130">https://hdl.handle.net/1911/16130</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/16130en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectPhysical chemistryen_US
dc.subjectMolecular physicsen_US
dc.titleDiode laser kinetic spectroscopy of formylen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentChemistryen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
8900223.PDF
Size:
5.56 MB
Format:
Adobe Portable Document Format
Download
Collections
Rice University Theses and Dissertations