Visible light energy

Similar types of cross-linking reactions are observed for polymers to which photosensitive molecules ate chemically attached to the backbone of the polymer stmcture (Fig. 7). Radiation curing of polymers using uv and visible light energies is used widely in photoimaging and photoresist technology (Table 8) (58,59). 

Yoong, L.S., Chong, F.K., and Dutta, B.K. (2009) Development of copper-doped Ti02 photocatalyst for hydrogen production under visible light. Energy,... 

Vlachopoulos, N., Liska, P., Augustynski, J. and Gratzel M. 1987. Very efficient visible light energy harvesting and conversion by spectral sensitization of high surface area polycrystalline titanium dioxide films. Submitted for publication. 

Only few informations are available on polymeric porphyrins in contrast to expected interesting properties such as visible light energy conversion, catalytic activity due to... 

Photosynthetic pigments, specifically chlorophylls, have been attached to a variety of matrices to convert visible light energy to electric or chemical energy. The molecular assemblies may be classified Into the following three categories. 

Polymeric phthalocyanines (Chap. 5.2) indude a great variety of properties. The construction of electrical devices or catalysts for spedal use is most hopeful. But all these applications depend on the reproduribility of well defined structural uniform polymers. Preparative work must help to standardize synthetic procedures and to investigate structures. The well reproducible in situ synthesis of thin layers of pure polymeric phthalocyanines from the gas phase opens a way for electrocatalysis and visible light energy changing devices. Another new kind of preparation goes via prepolymers which may be converted to mechanically and thermally stable, infusible polymers. 

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