Ytterbium phthalocyanine

Kashiwazaki67 has fabricated a complementary ECD using plasma-polymerized ytterbium bis(phthalocyanine) (pp—Yb(Pc)2) and PB films on ITO with an aqueous solution of 4M KC1 as electrolyte. Blue-to-green electrochromicity was achieved in a two-electrode cell by complementing the green-to-blue color transition (on reduction) of the pp—Yb(Pc)2 film with the blue (PB)-to-colorless (PW) transition (oxidation) of the PB. A three-color display (blue, green, and red) was fabricated in a three-electrode cell in which a third electrode (ITO) was electrically connected to the PB electrode. A reduction reaction at the third electrode, as an additional counter electrode, provides adequate oxidation of the pp Yb(Pc)2 electrode, resulting in the red coloration of the pp—Yb(Pc)2 film. 

Aroca, R., R.E. Clavijo, C.A. Jennings, G.J. Kovacs, J.M. Duff, and R.O. Loutfy (1989). Vibrational spectra of lutetium and ytterbium bis-phthalocyanine in thin solid films and SER(R)S on silver island films. Spectrochim. Acta A 45, 957. 

FIGURE 9.1 Electronic spectra of double-decker complexes bis-phthalocyanines lutetium, ytterbium, erbium and holmium in CHC13. 

FIGURE 9.7 Scheme of changes in the shape of electronic absorption spectra bis-phthalocyanines ytterbium complex in alcoholic solution SiO in time. 

We have obtained thin film of a mixture of double-decker ytterbium and lute-tium phthalocyanine with polymer solution PVP and PVA on four quartz substrates (Fig. 9.8). Next, a layer stracture was examined under a microscope. 

It is important to keep the spectral properties of lanthanide complex in a thin layer. Because, specific interaction bis phthalocyanine with albumin plays an important role in the evaluation of protein. Band in the absorption spectram (Fig. 9.9) phthalocyanine ytterbium in formed a thin layer is characterized by 664 mu. Spectral shape and position of the absorption band corresponds to the neutral form [16]. 

The recovery process a neutral form the phthalocyanine in the presence of Si02 can also be consider as a prototype of the sensing system for a biosensor for the determination of the silica. Therefore, we investigated the influence of alcohol solution on the absorption spectra of thin films of phthalocyanine double-decker lute-tium and ytterbium on polymeric matrices PVP and PVA 4 substrates (Fig. 9.10). 

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