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Dynamic and static quenching of fluorescence occurs upon contact interaction of oxygen molecules. Of the simplest models of the complex of oxygen and anthracene, a complex consisting of one molecule of oxygen and anthracene molecule is proposed. Quantum-chemical calculations were performed by using the Gaussian 98 software package. Equilibrium geometry of the ground electron state was obtained for a complex of oxygen and anthracene molecules. The electron absorption spectrum is calculated for this complex. It is established that this complex of oxygen and anthracene is not photo-stable.

QUANTUM-CHEMICAL CALCULATIONS OF THE STRUCTURE AND ELECTRON TRANSITIONS OF MULTIMOLECULAR FILMS