Photochemical ligand loss as a basis for imaging and microstructure formation in a thin polymeric film

Journal Article · Tue Dec 18 23:00:00 EST 1990 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00182a007· OSTI ID:5638625

Gould, S; O'Toole, T R; Meyer, T J ^[1]

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1. Univ. of North Carolina, Chapel Hill (United States)

Ligand loss photochemistry occurs in thin polymeric films of poly(Ru(bpy){sub 2}(vpy){sub 2}){sup 2+} (bpy is 2,2{prime}-bipyridine, vpy is 4-vinylpyridine), poly(Ru(Me{sub 2}bpy){sub 2}(vpy){sub 2}){sup 2+} (Me{sub 2}bpy is 4,4{prime}-dimethyl-2,2{prime}-bipyridine), and poly(Ru(Me{sub 4}bpy){sub 2}(vpy){sub 2}){sup 2+} (Me{sub 4}bpy is 4,4{prime},5,5{prime}-tetramethyl-2,2{prime}-bipyridine). These films were formed by reductive electropolymerization of the corresponding 4-vinylpyridine complexes on Pt disk electrodes. Upon photolysis, the ruthenium-pyridyl bonds were cleaved and the polymer was lost, exposing the underlying substrate. The photochemical reaction was used to transfer an image to the films by using masking techniques. In a subsequent step, poly(Os(vbpy){sub 3}){sup 2+} (vbpy is 4-methyl-4{prime}-vinyl-2,2{prime}-bipyridine), which is photochemically stable, was formed selectively in the exposed regions of the electrode by reductive electropolymerization. This procedure gave a laterally resolved, two-component, film-based structure in which there were discrete, spatially segregated regions of Ru{sup II} and Os{sup II}. In a final step, the remaining film containing Ru{sup II} was removed by photolysis. This procedure left an image of the original mask in the poly(Os(vbpy){sub 3}){sup 2+} that remained.

• OSTI ID: 5638625
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 112:26; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
AZINES
BIPYRIDINES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
FILMS
HETEROCYCLIC COMPOUNDS
INFORMATION
LIGANDS
METALS
MICROSTRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM COMPLEXES
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLATINUM
PLATINUM METALS
POLYMERS
PYRIDINES
REDUCTION
RUTHENIUM COMPLEXES
SYNTHESIS
THIN FILMS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
VOLTAMETRY