Polymeric coordination complexes based on cobalt, nickel, and ruthenium that exhibit synergistic thermal properties

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:141944

Belfoire, L A ^[1]

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1. Colorado State Univ., Fort Collins, CO (United States)

d-Block metal-containing polymer blends which form coordination complexes are the focus of this research. The model compounds are cobalt chloride hexahydrate, nickel acetate tetrahydrate, and diclorotricarbonylruthenium(II) dimer. The ligand is poly(4-vinylpyridine), P4VP, or copolymers that contain 4-vinylpyridine repeat units. Thermal analysis via differential scanning calorimetry suggests that the glass transition temperature of the polymeric ligand(s) is enhanced by the d-block metal salt in binary and ternary blends. The cobalt and nickel salts function as transition-metal compatibilizers for two immiscible copolymers of styrene with 4-vinylpyridine and butyl methaacrylate with 4-vinylpyridine. At the molecular level, Fourier transform infrared spectroscopy of P4VP-ruthenium precipitates reveals that the pyridine nitrogen lone pair coordinates to the metal center and strengthens ruthenium-carbonyl bonds in the polymeric complex. A thermodynamic interpretation of ligand field stabilization enhancement of the glass transition temperature, particularly when coordination crosslinks are present.

• OSTI ID: 141944
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
COBALT COMPLEXES
COORDINATION VALENCES
NICKEL COMPLEXES
POLYMERS
PYRIDINES
RUTHENIUM COMPLEXES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPLEXES