Physical Sciences and Mathematics Commons^™

Spectroscopic Study Of Ni(Ii)-4, 4’, 4’’, 4’ ’’ – Tetrasulfophthalocyanine In Aqueous Solution, Issa Ishaq Jabra

Masters Theses & Specialist Projects

It was determined spectrally that a monomer-dimer equilibrium exists in aqueous solutions of Ni-TSPC^4- over a concentration range of 5 x 10^-8 – 10^-4 M. Equilibrium measurements were made under natural ionic strength conditions at 29°, 39° and 49°C. The values obtained for the equilibrium constants at 29°, 39° and 49°C were 2.4 x 10⁸, 6.6 x 10⁷ and 2.9 x 10⁷ M^-1, respectively. These results indicated that the equilibrium strongly favors dimer formation. This study also showed that nickel is second to copper in enhancing the dimerization of metallotetrasulfophthalocyanine complexes. …

The Design And Construction Of A Nitrogen Laser And Its Use To Pump A Tunable Dye Laser To Measure The Multiphoton Ionization Spectrum Of Molecular Iodine, James Kintigh

Masters Theses & Specialist Projects

A nitrogen laser was constructed for use in multiphoton ionization studies. The short pulse duration and highly intense pulse make the nitrogen laser ideal for pumping a dye laser.

By using the nitrogen laser to pump a tunable dye laser, the multiphoton ionization spectrum for molecular iodine vapor was obtained for the visible spectrum between 23,188 cm^-1 (430 nm) and 16, 304 cm^-1 (615 nm) using pulsed electronics and a parallel plate ionization chamber. The ionization occurs in this region upon the absorption of four or five photons. The ionization appears to take place via a three-step process. …