Permeability and partitioning of ferrocene ethylene oxide and propylene oxide oligomers into electropolymerized films from acetonitrile and polyether solutions

Journal Article · Thu Oct 27 00:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100094a023· OSTI ID:6717729

Pyati, R; Murray, R W ^[1]

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

We report the first electrochemically-based measurements of the rates of small polymer permeation into another polymer. The small polymer permeants are ferrocene ethylene oxide oligomers containing 2, 7, and 16 units and a propylene oxide oligomer containing 3 units. Their permeation into ultrathin microelectrode-supported films of the metal complex polymer poly[Ru(vbpy)[sub 3]](ClO[sub 4])[sub 2] was measured from acetonitrile solutions and from solutions in a methyl-endcapped ethylene oxide oligomer, MPEG-400 (MW = 400). Permeations of other ferrocenes with bulky substituents were also measured from acetonitrile solutions. In all cases the permeability, PD[sub POL], into poly[Ru(vbpy)[sub 3]](ClO[sub 4])[sub 2] films is strongly dependent on the permeant molecular volume. Direct measurement of the partition coefficient, P, in acetonitrile shows that permeability variations among a series of related permeants are controlled more by variations in P than by diffusivity in the poly[Ru(vbpy)[sub 3]](ClO[sub 4])[sub 2] phase. Permeation of ferrocene polyether oligomers is much slower from MPEG-400 solutions than from acetonitrile; this appears to arise more from a decrease in D[sub POL] than from one of P. 19 refs., 4 figs., 2 tabs.

• OSTI ID: 6717729
• Journal Information: Journal of Physical Chemistry; (United States), Vol. 98:43; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MEMBRANES
PERMEABILITY
ORGANOMETALLIC COMPOUNDS
DIFFUSION
MEMBRANE TRANSPORT
PARTITION
POLYMERS
ACETONITRILE
ELECTROCHEMISTRY
FERROCENE
POLYETHYLENE GLYCOLS
POLYMERIZATION
RUTHENIUM COMPLEXES
SOLUTIONS
THIN FILMS
ALCOHOLS
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
DIENES
DISPERSIONS
FILMS
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
IRON COMPLEXES
MIXTURES
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYENES
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties
661300 - Other Aspects of Physical Science- (1992-)