Photoinduced optical activity of C70 fullerene in organic solvents

Abstract

UDC 535.21:547We have experimentally studied for the first time the effect of photoinduced rotation of the plane of polarization for pulsed laser radiation in solutions of C 70 fullerene in organic solvents and their mixtures. We have shown that the effect is observed for elliptical polarization of the laser radiation and is absent for linear polarization. We present the results of a study of the nonlinear optical characteristics of the C 70 solutions. We discuss the physical mechanisms by which nonlinear gyrotropy is induced in solutions.Introduction. Study of the optical and nonlinear optical properties of nanocarbon materials, in particular fullerenes and carbon nanotubes of various modifications, is of significant interest in connection with the possibility of their practical use in designing the next generation of fast optical and nonlinear optical devices. A number of publications (see, for example, [1][2][3][4][5]) have reported the use of solutions of C n fullerenes (n = 60, 70, 76, 84) and fullerenecontaining films as nonlinear optical limiters for laser radiation. In [6], Q-switched and self-mode-locked conditions were realized in a pulsed Er 3+ glass laser (λ = 1.54 μm) using a passive gate based on solutions of single-walled carb-

Fullerenes

“…26 The effect of photoinduced rotation of the polarisation for laser radiation in C 70 solution was found to be quite sensitive to changes in both the intensity and the degree of ellipticity of the optical radiation as well as the solvent composition. 27 2 Chemistry of the fullerenes 2.1 Organic chemistry 2.1.1 Addition reactions. The tether-directed regioselective bis-addition of triphenylamine bis-aldehyde onto C 60 fullerene via the 1,3-dipolar cycloaddition reaction of azomethine ylides was demonstrated.…”

“…164 The photodynamic activity, from the treatment of the cells with the C 70 -g-cyclodextrin complex was found to be much higher than that from the treatment with the C 60 -g-cyclodextrin complex and aminolevulinic acid. 165 The effects of the betaamyloid peptide A beta (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) and fullerene C 60 on the activity of the cytoplasmic enzymes lactate dehydrogenase, glutathione peroxidase and membrane-bound phosphofructokinase in human erythrocytes have been studied. Possible mechanisms of interaction of A beta (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) and fullerene C 60 with the erythrocyte membrane and enzymes were discussed.…”

“…165 The effects of the betaamyloid peptide A beta (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) and fullerene C 60 on the activity of the cytoplasmic enzymes lactate dehydrogenase, glutathione peroxidase and membrane-bound phosphofructokinase in human erythrocytes have been studied. Possible mechanisms of interaction of A beta (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) and fullerene C 60 with the erythrocyte membrane and enzymes were discussed. 166 A new type of solid-phase photosensitiser has been proposed and created on the basis of aggregated fullerene C 60 for the photodynamic inactivation of pathogens in biological liquids.…”

Features of self-aggregation of C 60 molecules in toluene prepared by different methods

“…The most probable mechanism of stability of C 60 fullerene aggregate/C 60 fullerene in water, regardless of the method of preparation of C 60 fullerene solution is the surface hydroxylation of C 60 molecules [4]. Fullerene C 60 has high lipophilicity [5], and is extremely valuable for innovative applications in medicine [6][7][8][9][10], chemical synthesis [11], catalysis [12], pharmacology [13], biomedical testing [14], electronics [15], solar energy [16] and optics [17][18][19]. C 60 fullerene is a nontoxic substance [20], having powerful antioxidant properties due to its high activity as free radicals acceptor [21].…”

Behavior of C70 Fullerene in a Binary Mixture of Xylene and Tetrahydrofuran

“…To date, many scientific papers have been published on the study of the characteristics of C 70 fullerene in various two-component organic solvents [26][27][28][29]. In this case, C 70 fullerene solutions are mainly considered as dispersed systems, since the C 70 molecule tends to self-organize in binary solutions.…”