Formation of Plasma Polymer Thin Films Containing Reactive Metal Chelate Sites
Journal Article (Journal Article)
We report here the successful incorporation of chemically active Co and Ni centers into plasma polymer thin films. Metal center incorporation was accomplished by simultaneous plasma polymerization of sublimed Co or Ni complexes with gaseous “comonomers” or Ar. The metal complexes include N,N′-bis(salicylidene)-1,2-phenylenediaminecobalt(II) (CoSalophen), N,N′-bis(salicylidene)ethylenediaminecobalt(II) (CoSalen), N,N′-bis(3-fluorosalicylidene)ethylenediaminecobalt(II) (CoFluomine), meso-tetraphenylporphyrinatocobalt(II) (CoTPP), meso-tetraphenylporphine (TPP), and meso-tetraphenylporphyrinatonickel(II) (NiTPP). Modification to the metal complex structure was observed by IR and UV-vis spectroscopies. IR spectra of plasma polymer films containing the Schiff's base complexes, prepared using Ar as a carrier gas, contained a band at 2190 cm , which can be attributed to nitrile group formation, and would necessarily result from destruction of the Co inner coordination sphere. This type of bond cleavage was eliminated by the use of polymerizable “comonomers” instead of Ar. IR spectra of CoFluomine films exposed to pyridine vapor indicate that pyridine is chemically bound within the films. Gravimetric analysis of the CoFluomine films revealed that the pyridine is bound in a 1:1 Co:pyridine ratio, suggested that the metal center remains chemically active. IR spectra of plasma polymer films containing the porphyrin complexes contain evidence for modification to the phenyl and pyrrole rings, indicating that the complexes may be attached to the plasma polymer matrix at these sites. UV-vis spectra of plasma polymer films containing CoTPP contain a band at 610 nm which may be due to chlorin formation, which is consistent with pyrrole ring substitution. Plasma polymer film solubility in toluene was used to estimate the extent of crosslinking within the films. Solubility was found to generally increase with increased concentration of complex in the films. This is discussed in terms of increased deposition rate and decreased glow discharge pressure during synthesis of films with higher metal chelate content. © 1994, American Chemical Society. All rights reserved. 2+ 2+ 2+ 2+ −1 2+
Full Text
Duke Authors
Cited Authors
- Skelly, JM; Morosoff, NC; Stannett, VT; Crumbliss, AL
Published Date
- February 1, 1994
Published In
Volume / Issue
- 6 / 2
Start / End Page
- 227 - 233
Electronic International Standard Serial Number (EISSN)
- 1520-5002
International Standard Serial Number (ISSN)
- 0897-4756
Digital Object Identifier (DOI)
- 10.1021/cm00038a022
Citation Source
- Scopus