Optical and spectral properties

It is generally accepted that true polymorphism results in distinct optical and spectral properties. The data presented are entirely negative in these respects. The evidence accumulated agrees with the findings of Pfeiffer55 and questions the formation of aspirin polymorphs. 

V. A. Radzig, I. N. Senchenia, in Thesis of VII Symposium on Optical and Spectral Properties of Glasses (Vavilov State Optical Institute, Leningrad), (1989) 254. 

Optical and Spectral Properties of Melt-processible Fluoroplastics... 

The structural and physical properties, in particular, the solid and liquid state behavior of lipids, and the optical and spectral characteristics of waxes have been described in detail. " ... 

Gold nanoclusters attract attention because of their optical and electronic properties. Photoluminescence studies have been carried out on nanometer-sized gold clusters and Au(I) complexes in the visible spectral range. 

Chloroplast cytochromes can readily be characterized quantitatively by optical spectroscopy, as they have characteristic absorption spectra as well as distinct absorption-difference spectra. The thylakoids in higher plants (e.g., spinach) contain three cytochromes Cyt b559, in either of two forms associated with PS II, and Cytb and Cyt/in the Cyt b complex. Although the a-absorption bands of all three cytochromes lie close to one another in the 550-560 nm region, it is possible to spectrally isolate the individual cytochromes by imposing carefully chosen redox potentials, as the redox-potential values of the different types of chromophores are sufficiently different from one another. Some of the optical and redox properties of the three spinach cytochromes are shown in the table accompanying the spectral properties in Fig. 8. 

Hydrophobic tryptophan residues present in the interior of food protein molecules contribute to the optical and fluorescent properties of proteins. Their spectral characteristics are considered to be important contributors in the study of protein conformation.61... 

The potential importance of diamond in technology follows from the wide range of technically desirable thermomechanical, optical, and electronic properties exhibited by diamond [9-13]. In addition to its extreme hardness and exceptional wear resistance, diamond is the stiffest known material, has a broad transmission spectral range (from the ultraviolet to the far infrared and extending to microwave frequencies), has the highest room-temperature thermal conductivity, one of the lowest thermal expansion coefficients and is radiation hard and chemically inert to all acid and base reagents. 

Bhyrappa, P., and P. Bhavana (2001). Unusual solvent dependent optical absorption spectral properties of free-base perhaloporph5rins. Chem. Phys. Lett. 342, 39-44. 

The physical chemical and optical properties of materials involved in optical spectroscopy are of crucial importance. The quality of these materials effectively determines the quality of the data derived from spectral measurements. The majority of measurements are carried out in solution and solvent quality is a major factor in obtaining accurate data. This section will cover the optical and physical properties of... 

Spectroelectrochemistry as a combination of electrochemistry and UVA IS spectroscopy is self-evident because of the direct relation of electron transfer with changes in electronic orbitals and thus with spectral changes. In redox proteins, with a few exceptions, the redox activity is caused by cofactors such as hemes, quinines, iron sulfur centers or metal centers, depending on the function and on the potential range. The role of the protein backbone and the amino acid side chains is the binding and precise orientation of these cofactors and the fine-tuning of their optical and redox properties with polarity or charges. In this context, the protein must able to react to redox transitions with conformational... 

Qiapter 5. Photonic Glasses Nonlinear Optical and Spectral Hole Burning Properties Masayuki Nogami, S. TamU Sdvan, Hor wei Song... 

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