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


Toby R. Long

Date of Graduation

Fall 2004


Master of Science in Chemistry


Chemistry and Biochemistry

Committee Chair

Mark Richter


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.


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

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© Toby R. Long