Synthesis and spectroscopy studies of fullerenes and discovery of macroscopic quantities of doped fullerenes

dc.contributor.advisorSmalley, Richard E.en_US
dc.creatorChai, Yanen_US
dc.date.accessioned2009-06-04T00:39:15Zen_US
dc.date.available2009-06-04T00:39:15Zen_US
dc.date.issued1992en_US
dc.description.abstractSynthesis techniques of carbon arc and laser vaporization in the furnace for production of fullerenes have been developed. The optimum conditions for the high yields of fullerenes were tested and studied. A fullerene growth model was proposed to explain the formation of the fullerenes and the extraordinary high yield of C$\sb{60}$. The results of a test of this growth model was in agreement with the implications of the model. The electronic spectra of neutral C$\sb{60}$ and C$\sb{70}$ in the regions from 375 to 415 nm and 595 to 640 nm have been studied in a supersonically cooled molecular beam by resonant two-photon ionization spectroscopy method. Sharp spectral features were observed in both regions for C$\sb{60}$ and in only the longer wavelength region for C$\sb{70}$. Neither molecule has the spectra that correspond to the diffuse interstellar bands. The first method to produce macroscopic quantities of internal metal-doped fullerenes was developed successfully and improved. Lanthanum-doped fullerenes were produced by laser vaporization of a lanthanum oxide/graphite composite rod in a flow of argon at 1200$\sp\circ$C. Many properties of these endohedral complexes were investigated in detail. Similar results were obtained with yttrium-doped fullerenes, and double-doped endohedral fullerene complexes were first observed as a stable species in both sublimed film and toluene solution. Macroscopic quantities of other interesting metal-doped or B-doped fullerenes have been obtained and studied. Purification of these metal-doped fullerenes is in the process.en_US
dc.format.extent96 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Phys. 1992 Chaien_US
dc.identifier.citationChai, Yan. "Synthesis and spectroscopy studies of fullerenes and discovery of macroscopic quantities of doped fullerenes." (1992) Diss., Rice University. <a href="https://hdl.handle.net/1911/16576">https://hdl.handle.net/1911/16576</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/16576en_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.titleSynthesis and spectroscopy studies of fullerenes and discovery of macroscopic quantities of doped fullerenesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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