skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Part I. Molecular dichroism, optical and catalysis studies of several metalloporphyrins. Part II. Solid state studies

Abstract

Part 1. Tetra(4-N-methylpyridyl)porphyrinatopalladium (II), [Pd-TMpyP][sup 4+], was prepared by a new technique, purified and intercalated with calf thymus DNA. The Soret and Q band regions were studied using Circular Dichroism (CD) and magnetic Circular Dichroism (MCD). The MCD measurements in Soret and Q band regions and CD of the Q band regions are reported for the first time. The known photocatalyst, tetra(4-pyridyl)porphyinato-zinc(II), was covalently bonded to the surfaces of both iodinated (Ia) and chlorinated (Ib) cross-linked poly(siloxane) materials. Thermal catalytic activity was found to be present, and it was quantitatively measured using olefin oxidation of styrene to acetophenone. The zinc porphyrin supported on iodinated poly(siloxane) showed an over 12-fold increase in catalytic activity, as measured by turnover numbers, compared to the chlorinated support material. Part II. The plasmas produced by ablation of YBa[sub 2]Cu[sub 3]O[sub 7] single-phase high T[sub C] bulk superconductors when exposed to XeCl excimer laser pulses have been studied. The luminescence of the laser-induced vapor plume have been analyzed using optical emission spectroscopy. Excited atomic neutral and single ionized species (Cu/Cu[sup +], Ba/Ba[sup +], Y/Y[sup +]) as well as some molecular emission bands (CuO, YO) were observed within the experimental resolution of an optical multichannel analyzer detectionmore » system. A liquid mediated pulse laser irradiation procedure was used in the attempt to form thin layers of carbides and nitrides of silicon. A boron doped single crystal (100) of silicon was irradiated while immersed in cyclohexane or liquid ammonia. Irradiation of the samples was carried out using a 308 nm excimer laser. The laser pulses had energy densities of 0.5 to 3.0 J cm[sup [minus]2] and the number of pulses used ranged from 1 to 50. The specimens were analyzed using specular reflectance and auger electron spectroscopies.« less

Authors:
Publication Date:
Research Org.:
North Carolina State Univ., Raleigh, NC (United States)
OSTI Identifier:
6908723
Resource Type:
Miscellaneous
Resource Relation:
Other Information: Thesis (Ph.D.)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BARIUM OXIDES; ABLATION; CUPRATES; ORGANOMETALLIC COMPOUNDS; CATALYTIC EFFECTS; MAGNETIC CIRCULAR DICHROISM; PORPHYRINS; YTTRIUM OXIDES; AUGER ELECTRON SPECTROSCOPY; HIGH-TC SUPERCONDUCTORS; INTERMETALLIC COMPOUNDS; LASER-PRODUCED PLASMA; OPTICAL PROPERTIES; SPECTRAL REFLECTANCE; ALKALINE EARTH METAL COMPOUNDS; ALLOYS; BARIUM COMPOUNDS; CARBOXYLIC ACIDS; CHALCOGENIDES; COPPER COMPOUNDS; DICHROISM; ELECTRON SPECTROSCOPY; HETEROCYCLIC ACIDS; HETEROCYCLIC COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PLASMA; SPECTROSCOPY; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 664200* - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)

Citation Formats

Sito, M L. Part I. Molecular dichroism, optical and catalysis studies of several metalloporphyrins. Part II. Solid state studies. United States: N. p., 1993. Web.
Sito, M L. Part I. Molecular dichroism, optical and catalysis studies of several metalloporphyrins. Part II. Solid state studies. United States.
Sito, M L. 1993. "Part I. Molecular dichroism, optical and catalysis studies of several metalloporphyrins. Part II. Solid state studies". United States.
@article{osti_6908723,
title = {Part I. Molecular dichroism, optical and catalysis studies of several metalloporphyrins. Part II. Solid state studies},
author = {Sito, M L},
abstractNote = {Part 1. Tetra(4-N-methylpyridyl)porphyrinatopalladium (II), [Pd-TMpyP][sup 4+], was prepared by a new technique, purified and intercalated with calf thymus DNA. The Soret and Q band regions were studied using Circular Dichroism (CD) and magnetic Circular Dichroism (MCD). The MCD measurements in Soret and Q band regions and CD of the Q band regions are reported for the first time. The known photocatalyst, tetra(4-pyridyl)porphyinato-zinc(II), was covalently bonded to the surfaces of both iodinated (Ia) and chlorinated (Ib) cross-linked poly(siloxane) materials. Thermal catalytic activity was found to be present, and it was quantitatively measured using olefin oxidation of styrene to acetophenone. The zinc porphyrin supported on iodinated poly(siloxane) showed an over 12-fold increase in catalytic activity, as measured by turnover numbers, compared to the chlorinated support material. Part II. The plasmas produced by ablation of YBa[sub 2]Cu[sub 3]O[sub 7] single-phase high T[sub C] bulk superconductors when exposed to XeCl excimer laser pulses have been studied. The luminescence of the laser-induced vapor plume have been analyzed using optical emission spectroscopy. Excited atomic neutral and single ionized species (Cu/Cu[sup +], Ba/Ba[sup +], Y/Y[sup +]) as well as some molecular emission bands (CuO, YO) were observed within the experimental resolution of an optical multichannel analyzer detection system. A liquid mediated pulse laser irradiation procedure was used in the attempt to form thin layers of carbides and nitrides of silicon. A boron doped single crystal (100) of silicon was irradiated while immersed in cyclohexane or liquid ammonia. Irradiation of the samples was carried out using a 308 nm excimer laser. The laser pulses had energy densities of 0.5 to 3.0 J cm[sup [minus]2] and the number of pulses used ranged from 1 to 50. The specimens were analyzed using specular reflectance and auger electron spectroscopies.},
doi = {},
url = {https://www.osti.gov/biblio/6908723}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Miscellaneous:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item.

Save / Share: