Complex sensitive properties

Both phthalocyanines and porhyrins are very promising sensitizers for wide band gap semiconductors. DSSCs fabricated from these kind of sensitizers present overall power conversion efficiency as high as 7%, which is still smaller than that achieved by the ruthenium polypyridyl complexes though, but higher than most of other dyes. The multiplicity on the molecular structure modification of these compounds provides a great potential for further promotion on their sensitization properties. The research in this field is still far from systematic and comprehensive and quantitatively much less than the researches on polypyridyl ruthenium complexes. But... 

The sensitizing properties of one production batch of a complex mixture can be assumed to be substantially equivalent to that of another production batch of the same commercial product and produced by or under the control of the same manufacturer, unless there is reason to believe there is significant variation such that the sensitization of the batch has changed. If the latter occurs, new classification is necessary. 

TABLE 11. Optical properties methanol at 21 (193). of some OTM complex sensitizers in... 

Due to the used preparation technique, one can expect unique gas-sensitive properties of the layers. Their behaviour differs from that typical of sensors fabricated by using other routs. But the ultimate goal of this study is applying systems of complex structure, since the advantages of the sol-gel technique are the most prominent not for single oxides but for binary oxide systems. Their structural features provide a variety of gas-sensitive properties of such materials. Note, that the properties of the layers are rather influenced by the type of sensors used as well. 

KH Okhapkin, I.M., Nasimova, I.R., Makhaeva, E.E., and Khokhlov, A.R., Effect of complexation of monomer units on pH- and temperature-sensitive properties of poly(A-vinylcaprolactam-co-methacrylic e id). Macromolecules, 36, 8130, 2003. 

As a further com dicating factor, tryptophan dis days complex spectral properties due to the presence of two nearly isoenergetic excited states. and The electronic transitions display distinct absorption, emission, and anisotropy spectra and are differently sensitive to solvent polarity. The complexity of indole photc hysics has stimulated detailed studies of protein fluorescence but has also inhibited interpretation of the data. 

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