Conference publications

Comparison of experimental data on phenol-induced enhancement of the chemiluminescence response with the quantum-chemical calculations

Shubina V. S., Naumov A. A., Shatalin Yu. V., Ryzhkov P. A., Potselueva M. M.

Russia, Pushchino

"Математика. Компьютер. Образование". Cб. трудов XII международной конференции. Под общей редакцией Г.Ю. Ризниченко Ижевск: Научно-издательский центр "Регулярная и хаотическая динамика", 2005. Vol. 3, 344pp. Pp. 890-898.

The present our study of enhancement of the sensitivity of luminoldependent chemiluminescence with phenol derivatives in a model system containing luminol (2.8x10^-5M), horse-radish peroxidase (0.02 mg/ml) and hydrogen peroxide (2.9x10^-5M). In the presence of phenol derivatives (10^-3 – 10^-7М) the intensity of the chemiluminescence response increased in the series: phenol (3–7%) > fluorophenol (10–12%) > fluorophenol (20–25%) > fluorophenol (70–73%) > iodophenol (120–130%). The energy difference (ΔE_radical−ΔE_anion ) was shown to increase in the series: phenol (47.36) > 2-fluorophenol (52.04) > 4-fluorophenol (52.54) > 3-fluorophenol (54.92) > 4-iodophenol (55.02) > luminol (58.85) > 4-nitrophenol (79.17) > 2,4-dinitrophenol (110.65). For a number of compounds whose energy difference exceeded the value obtained for luminol, a quenching of the chemiluminescence response was observed. The quantum-chemical calculations were completely confirmed by the experimental data.

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