Electrogenerated Chemiluminescence of Iridium-Containing ROMP Block Copolymer and Self-Assembled Micelles

The electrochemical properties and electrogenerated chemiluminescence (ECL) of an Ir(ppy)2(bpy)+-containing ROMP monomer, block copolymer (containing Ir(ppy)2(bpy)+ complexes, PEG chains, and butyl moieties), and self-assembled micelles were investigated. Following polymerization of the iridium comp...

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Bibliographic Details
Published in:Langmuir 2013-10, Vol.29 (41), p.12866-12873
Main Authors: Tefashe, Ushula M, Metera, Kimberly L, Sleiman, Hanadi F, Mauzeroll, Janine
Format: Article
Language:English
Subjects:
2,2'-Dipyridyl - chemistry
Chemiluminescence
Chemistry
Colloidal state and disperse state
Electrochemical Techniques
Exact sciences and technology
General and physical chemistry
Iridium - chemistry
Luminescence
Micelles
Micelles. Thin films
Molecular Structure
Organometallic Compounds - chemical synthesis
Organometallic Compounds - chemistry
Photosensitizing Agents - chemical synthesis
Photosensitizing Agents - chemistry
Polymerization
Pyridines - chemistry
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Summary:The electrochemical properties and electrogenerated chemiluminescence (ECL) of an Ir(ppy)2(bpy)+-containing ROMP monomer, block copolymer (containing Ir(ppy)2(bpy)+ complexes, PEG chains, and butyl moieties), and self-assembled micelles were investigated. Following polymerization of the iridium complex, we observed multiple oxidation peaks for the block copolymer in cyclic voltammograms (CV) and differential pulse voltammograms (DPV), suggesting the presence of multiple environments for the iridium complexes along the polymer backbone. The ECL signals from monomer 1 and polymer 2 were reproducible over continuous CV cycles and stable over prolonged potential biases, demonstrating their robustness toward ECL-based detection. Comparison of the ECL signal of the block copolymer, containing multiple iridium complexes attached to the backbone, and the monomeric complex showed enhanced signals for the polymer. In fact, formation and reopening of the self-assembled micelles allowed recovery of the polymer and near complete retention of its original ECL intensity.
ISSN:0743-7463
1520-5827
DOI:10.1021/la402518v