Variety in the coupling of mesoporphyrin IX to apohorseradish peroxidase C studied by energy selected fluorescence excitation and vibronic hole burning spectroscopy

Article Abstract:

A study was conducted to analyze the coupling between the heme and surround protein in horseradish peroxidase after the substitution o the iron protoheme by mesoporphorin IX. Holes were burnt in the vibronic bands using a tunable dye laser. Experimental results indicated that the formation of the photoautomeric complexes at low temperatures in the protein crevice correlated with the slow down of vibronic relaxation.

Research, Fluorescence, Proteins, Peroxidase, Heme, Horse-radish, Horseradish

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Temperature transformation of dopant spectra in incommensurate biphenyl

Article Abstract:

The temperature-induced transformation of inhomogeneous spectra of an optical probe can reflect structural changes of the biphenyl crystal are demonstrated. This can be possible if there is good enough accommodation of quest (probe) molecules into the host (biphenyl) crystal and close to the pure biphenyl values for critical parameters can also be obtained.

Biphenyl (Compound)

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Tight-binding method and multiband effective mass theory applied to CdS nanocrystals single-particle effects and optical spectra fine structure

Article Abstract:

Atomistic tight-binding method and multiband effective mass theory were used to interpret optical spectra of CdS nanocrystals. Both methods correctly described the energy splitting between the two lowered optically active transitions and their relative strengths, proving the same labeling of the two main adsorption peaks of the spectrum.

Spectra, Atomic theory

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