Biomedical Engineering Reference
In-Depth Information
Scheme 31
Upper panel
: Complex formation between acetylenes and cobalt carbonyls.
Lower panel
: Formation of polymer complexes
81
and
82
via metal complexation and
transformation of the complexes into soft ferromagnetic materials
83
and
84
by pyrolytic
ceramization
the end of reaction, and the products were purified by pouring the THF so-
lutions into hexane. The polymer complexes are stable in air, whose metal
incorporation had been verified by IR analysis [34, 160].
Homogenous yellowish brown-colored films of metallized polymer
81
could be readily prepared by spin coating its freshly prepared complex solu-
tion. The films were irradiated through a copper negative mask. Interestingly,
the color of the illuminated parts was bleached due to the decomposition of
cobalt carbonyl complex, leaving behind the two-dimensional pattern of the
photomask (Fig. 16). The enlarged micrograph clearly reveals the sharp edges
of the patterns.
Fig. 16 A
Optical micrograph of two-dimensional photopattern generated by photoly-
sis of a metallized
hb
-PY (
81
) through a copper-negative mask.
B
Image with a higher
magnification and
C
molecular structure of polymer complex
81
