Summary: 6144 J. Am. Chem. SOC.1980, 102, 6144-6146
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Figure 3. Modification of the fluorescence intensity (A,,, 421 nm, A,,
648 nm) of In203-CG(a) and -8 X mol/cm2 ZnTPP on In203-CG
(b) as the applied potential is scanned from 0.0 to 1.O V and back. Trace
(a) illustrates only the absence of any change in intensity due to the
substrate. The dip in (b) represents a loss in intensity of about 20%. The
zero of the background trace has been moved for clarity.
evaporating to dryness under a stream of N2or by soaking the
end of the strip in the solution for several minutes and rinsing off
the excess with distilled water.
Fluorescence spectra indicate that the ZnTPP applied to the
electrode in this manner does not merely crystallize and adhere
to the surface. Excitation and emission spectra of various forms
of ZnTPP are shown in Figure 1. Experimental spectra of the
solution phase are very comparable to previously reported ones