Thesis Title

An Investigation of the Electrochemical, Spectroscopic, and Electrochemiluminescent Properties of Platinum Ii Octaethylporphyrin Including a New, Experimental System For Testing Hydrophobic, Light-Emitting Molecules

Author

Toby R. Long

Date of Graduation

Fall 2004

Degree

Master of Science in Chemistry

Department

Chemistry

Committee Chair

Mark Richter

Keywords

platinum, ECL, electrochemiluminescence, metalloporphryns, Ru(bpy)₃²⁺

Subject Categories

Chemistry

Abstract

The electrochemical, spectroscopic, and the electrogenerated chemiluminescent (ECL) properties of platinum (II) octaethylporphyrin (PtOEP) were investigated under non-aqueous solvent conditions. Coreactant methods were used to produce ECL from PtOEP using tri-n-propylamine as the coreactant. The ECL efficiency (øECL) of the PtOEP was = 0.18 in a 50:50 v/v mixture of acetonitrile: methylene chloride at a concentration of 100 uM as compared to 10uM Ru(bpy)₃Cl₂ øECL = 1.0. The ECL efficiency of the 100 uM PtOEP in 100% methylene chloride was found to be much more efficent øECL = 3.90 as compared to [Ru(bpy)₃(PF₆)₂]. This is most likely due to the quenching of the excited, Ru(bpy)₃²⁺ triplet state in these solvent conditions. Due to the need for increased hydrophobic molecules was designed, built, and tested. The new, flow-type ECL cell was compared to previous methods used by the Richter research group. Testing of the new system has shown promising results including increased sensitivity and a decrease in analysis times.

Copyright

© Toby R. Long

Citation-only

Dissertation/Thesis

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