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The nonlinear optical responses of perovskite films CsPbI2Br, MAPbI3 + 1% PVC, MA0.15FA0.75Cs0.1PbI2.85Br0.15, and MA0.15FA0.75Cs0.1PbI3, irradiated by femtosecond laser pulses with wavelengths of 1064 and 532 nm, are investigated using z-scan measurements. Nonlinear absorption is found to occur in perovskite films irradiated at a wavelength of 1064 nm; the nonlinear absorption coefficient in thin films (45 – 65 nm) greatly exceeds that in thick ones (120 – 350 nm): 524 – 928 and 38 – 50 cm GW−1, respectively. It is shown that the nonlinear absorption saturation intensity for perovskite films depends on the pump pulse duration and increases with pulse shortening. It is also established that the nonlinear absorption coefficient of organometallic perovskite films exceeds that of a film of inorganic perovskite CsPbI2Br. Bleaching of film samples during z-scanning at a wavelength of 532 nm is related to the irreversible photochemical degradation of films exposed to intense light. The kinetics of photochemical bleaching of the films is detected at a wavelength of 532 nm.

The thin MAPbI3 and MA0.15FA0.75Cs0.1PbI3 perovskite films have strong nonlinear absorption with coefficients of 443 ± 20 and 830 ± 50 cm GW–1, respectively, due to two-photon absorption at 1064 nm. The photochemical degradation of perovskite films was observed upon irradiation with femtosecond pulses at 532 nm, and the depth of photodegradation decreased in perovskite films protected with a PMMA polymer layer.

A mixture of water suspensions of graphene oxide (GO) and polytetrafluoroethylene (PTFE) was used to make the films GO-PTFE (50:50). They became conductive (2.0-2.8 S/cm) while maintaining flexibility after reduction with hydrazine and subsequent annealing at 370 °C. The structure and morphology of the reduced films (rGO-PTFE) are examined in detail by means of a number of techniques such as scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, Raman, and contact angle wetting. The results of the films tested as current collectors in a metal-free supercapacitor with electrodes from microwave exfoliated GO and an acid (1 M H2SO4) electrolyte are presented.

Polytetrafluoroethylene-based aerogel has been synthesized for the first time. Graphene oxide has been used as a binder. After reduction with hydrazine and annealing at 370°C, the aerogel surface has been found to become superhydrophobic (the contact angle of water is 162°). Superhydrophobic aerogel with a specific gravity of 30 mg/cm3 has been characterized by IR spectroscopy and X-ray photoelectron spectroscopy.

Changes in surface energy and electrical conductivity of polyimide (PI)-based nanocomposite films filled with carbon nanotubes (CNTs) induced by UV exposure are gaining considerable interest in microelectronic, aeronautical, and aerospace applications. However, the underlying mechanism of PI photochemistry and oxidation reactions induced by UV irradiation upon the surface in the presence of CNTs is still not clear. Here, we probed the interplay between CNTs and PIs under UV exposure in the surface properties of CNT/PI nanocomposite films. Changes in contact angles and surface electrical conductivity at the surface of CNT/PI nanocomposite films after UV exposure were measured. The unpaired electron intensity of free radicals generated by UV exposure was monitored by electron paramagnetic resonance. Our study indicates that the covalent interactions between CNTs and radicals generated by UV irradiation on the PI surfaces tailor the surface energy and surface conductivity through anchoring radicals on CNTs. Surprisingly, adding CNTs into PI films exposed to UV leads to antagonistic contributions of dispersion and polar components to the surface energy. The surface electrical conductivity of the CNT/PI nanocomposite films has been improved due to an enhanced hopping behavior with dense π-conjugated CNT sites. To explain the observed changes in surface energy and surface conductivity of CNT/PI nanocomposite films induced by UV exposure, a qualitative model was put forward describing the covalent interactions between UV-induced PI free radicals and CNTs, which govern the chemical nature of surface components. This study is helpful for characterizing and optimizing nanocomposite surface properties by tuning the covalent interactions between components at the nanoscale.

Aerogel is obtained from graphene oxide reduced by a mixture of H3PO2 and I2. The porous structure of an aerogel has been studied at room temperature using the method of standard contact porosimetry. Both water and octane were used as working fluids, which allowed us to study the pore size distributions of hydrophilic and hydrophobic pores separately. It was found that very small pores, with the radius

This work is dedicated to low-molecular hydrogels based on biodegradable sodium deoxycholate (SDC) and lysine hydrochloride (lys × HCl) with magnesium octa-[(4'-benzo-15-crown-5)-oxy]phthalocyaninate (Mgcr8Pc) as the active component, namely, their synthesis, spectral properties of gel-solubilized Mgcr8Pc, its release from the gel etc. Addition of Mgcr8Pc occurs both via the mixing of the components and via its diffusion from the aqueous solution into the phase of the formed SDC/lys × HCl gel. Mgcr8Pc-containing hydrogels are thermoreversible. The state of Mgcr8Pc in the SDC/lys × HCl/NaCl gel at the room temperature and in the melt is studied using spectral methods. Gel melting releases Mgcr8Pc in the form of a micelle-bound monomer. The presence of the Mgcr8Pc monomer phase in the phthalocyanine-carrying supramolecular hydrogel causes fluorescent activity of the latter.

An aqueous suspension of a reduced composite of graphene oxide and humic acid has been prepared and used as ink to print conductive films and electrodes for supercapacitors. The dry powders of the composite ink before and after hydrazine reduction were characterized by IR and Raman spectroscopies and XPS. The surface areas of the reduced composite measured using the Brunauer-Emmett-Teller (BET) and standard contact porosimetry (SCP) methods were 6.5 and 200 m2/g, respectively. Moreover, the composite thin films obtained by printing exhibited island-like character. Further, the specific capacitance and other electrochemical properties of the supercapacitor using the composite electrode were studied.

A suspension formed as a result of ultrasonication of a mixture of graphite with N,N-dimethylformamide has been studied by 1H NMR spectroscopy. The dependence of the width of the 1H NMR signal on the N,N-dimethylformamide content of the suspension has been determined.

A graphene oxide aerogel synthesized from graphene oxide hydrogel and graphene aerogels have been synthesized using the sol−gel method by reducing a suspension of graphene oxide with various reducing agents: a mixture of hypophosphorous acid and iodine, L-ascorbic acid, sodium metabisulfite, and by hydrothermal treatment. The obtained aerogels have been studied by scanning electron microscopy, IR spectroscopy, Raman spectroscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy. Comparative studies of graphene aerogels have shown that their properties, namely density, specific surface area, reduction degree, surface morphology, defectiveness of graphene sheets, interlayer spacing, average sizes of coherent scattering regions, number of layers, and crystallite size in the basal plane in graphene crystallites depend on the method of synthesis.

Two materials have been derived from a composite of humic acid and graphene oxide (HA-GO). First material was obtained by high-temperature carbonization of the HA-GO composite in an inert atmosphere, and second material was produced by reduction of the HA-GO composite with hydrazine hydrate. The results of comparative studies of the materials using IR, Raman and XPS spectroscopies are presented. In IR spectra, no absorption due to stretching of vibrations O H is observed for both the materials. The XPS spectra of humic acids and its composite show sufficiently high content of carbon atoms, which are bonded with oxygen atoms, the C1s peak in the XPS spectra of both the materials under study show asymmetry inherent of graphite material, which confirms the outcomes of IR and Raman studies. This could be attributed to high conductivity of the materials. It has also been established that specific surface area SBET is equal to 36.2 and 6.5 m2/g for thermally treated composite and chemically treated composites materials, respectively. However, the values of specific surface area SSCP, measured by the method of standard contact porosimetry with octane as a working liquid, is equal to 470 m2/g and 200 m2/g in the case of thermally treated composite and chemically treated composites materials, respectively.

A technique is described for producing 2D-printing ink based on ultrasound exfoliated graphite (UEG). It has been established that the conductivity of a film obtained by microfiltration of such ink is 26.4 S/cm. Data on the morphology, composition, and IR spectra of UEG films are provided and compared with analogous data for reduced graphene-oxide films.

Nonlinear absorption of suspensions of graphene nanosheets with the number of layers from one to three was studied using the Z-scan method with femtosecond excitation at 1030 nm wavelength. A large modulation depth and lower saturation intensity of the suspensions as compared with nonlinear absorption of single-layer graphene were shown. Dynamics of photoexcited carriers for different duration of excitation pulse was considered. The values of the absorption cross section and the density of photoexcited carriers in single-layer graphene were estimated. The presence of two-photon absorption (TPA) in suspensions of graphene nanosheets and the absence of noticeable TPA in single-layer graphene were shown.

The nonlinear optical absorption of aqueous suspension with a few-layer (4–5 layers) molybdenum disulfide (MoS2) was investigated by Z- and P-scan methods using second harmonic generation from Yb-doped femtosecond pulsed laser. Two regions with different nature of the nonlinear absorption were registered when the intensity of the incident radiation increased from low to high values. The 3-level model for one-photon transitions in the few-layer MoS2 was proposed for describing the experimental data. Absorption cross sections and relaxation times for interband and intraband transitions under femtosecond excitation on 514 nm have been estimated.

It has been found that ultrasonic irradiation of graphite in N-methylpyrrolidone is accompanied by the formation of polymer nanoparticles. These particles form aggregates with n-layered graphene particles, the formation of which prevents graphene particles from precipitation during centrifugation.

One-step synthesis of the nanocomposite of few-layer graphene structures with cobalt oxides was realized using the method of electrochemical exfoliation of graphite. The exfoliation process was carried out in alternating anodic-cathodic plasma mode in 1 M Na2SO4 + 0.01 M CoSO4 solution. Obtained nanocomposite was characterized by scanning and transmission electron microscopy, X-ray photoelectron and Raman spectroscopy. Besides, a catalytic activity of the nanocomposite of few-layer graphene structures with cobalt oxides towards the oxygen reduction reaction was assessed, and a considerable decrease in the oxygen reduction overpotential and an electron transfer number of ca. 3.6 were demonstrated. The observed effect was found to be caused by 40 wt% of cobalt (II) and (III) oxides in the nanocomposite.

Ultrafast pulse generation in all-normal dispersion Yb-doped fiber laser on 1.04 μm have been reported. Stable self-starting pulse generation in output of the ring fiber laser have been investigated where nonlinear polarization rotation interacted with contribution from the single walled carbon nanotube saturable absorber. Laser pulses with 0.7 nJ pulse energy and 1.7 ps pulse width at 35.6 MHz repetition rate were achieved. The output pulse could be externally compressed to width of 180 fs by pair of gratings.

Saturable absorption (SA) of film composites based on carboxymethylcellulose (CMC) polymer with single-walled carbon nanotubes (SWNTs) and graphene (GR) was studied by the Z-and P-scan methods with femtosecond probing pulses at a wavelength of 1.06 μm. The values of the saturation intensities for composites GR-CMC and SWNT-CMC were determined. The optical and thermal damage thresholds of the composites were measured. Q-switching stability limits for passive mode locking in fiber laser with SWNT-CMC SA were analyzed.

When nanocarriers are used for drug delivery they can often achieve superior therapeutic outcomes over standard drug formulations. However, concerns about their adverse effects are growing due to the association between exposure to certain nanosized particles and cardiovascular events. Here we examine the impact of intravenously injected drug-free nanocarriers on the cardiovasculature at both the systemic and organ levels. We combine in vivo and in vitro methods to enable monitoring of hemodynamic parameters in conscious rats, assessments of the function of the vessels after sub-chronic systemic exposure to nanocarriers and evaluation of the direct effect of nanocarriers on vascular tone. We demonstrate that nanocarriers can decrease blood pressure and increase heart rate in vivo via various mechanisms. Depending on the type, nanocarriers induce the dilation of the resistance arteries and/or change the responses induced by vasoconstrictor or vasodilator drugs. No direct correlation between physicochemical properties and cardiovascular effects of nanoparticles was observed. The proposed combination of methods empowers the studies of cardiovascular adverse effects of the nanocarriers.

The subject of investigation is poly-N-epoxypropylcarbazole and poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene-vinylene] films with zinc 2,3,9,10,16,17,23,24-octabutylphthalocyanine additives. The photoconducive and photodielectric properties of these heterostructures are studied in the absorption range of the metal complex. The photosensitivity of the structures depends on the triplet state of photogenerated electron-hole pairs, their dissociation in an external electric field, and charge carrier trapping. The increased photosensitivity of the heterostructures compared with that of constituent films is explained by a higher efficiency of dissociation of the photogenerated electron-hole pairs and a reduced influence of non-equilibrium carrier traps at the interfaces.

Electro-and photoconductive properties of polymer composites doped with heteropolynuclear M(II)/Cr(III) (M = Zn, Co, Mn) complexes were studied in the presence of organic additives with different electron donor-acceptor properties: anthracene, fullerene C60, terephthaloyldianthracene, and bis(biphenyl)chromium(I) fulleride (Ph-Ph)2CrC60. Upon excitation of the d-d transition in Cr(III), the magnitude of inner photoelectric effect in composite films examined is the highest for the Zn(II)/Cr(III) complex and increases in the series of additives anthracene, fullerene C60, terephthaloyldianthracene, (Ph-Ph)2CrC60. The use of the dopant (Ph-Ph)2CrC60 increases photocurrent by about two orders of magnitude.

In this work the thin polymer films (based on polyvinyl alcohol or carboxymetylcellulose) containing single-wall carbon nanotubes synthesized by different methods have been fabricated by a novel technology and studied in detail by UV-VIS-NIR optical absorption and Raman scattering techniques. The films are prospective as an optical material with a high non-linearity. This property allows using them as ultra-fast saturable absorbers in different laser schemes, especially, in fiber lasers. The optical spectroscopy has been used for optimization of several film parameters: an optical density, a thickness, a level of scattered light and proximity of the film absorption bands to the operation wavelengths of different solid state lasers.

The photoconductivity and photodielectrical properties of films of an aromatic polyimide with the addition of cationic and anionic polymethyne dyestuffs have been studied. The sensitization of the photoeffect of the dyes with different ionicity in polyimide films with donor and acceptor units develops the possibility of photogeneration of holes and electrons from dyestuff molecules and internal bipolar conductivity of the polyimide.

A series of new nitrogen-containing fullerene derivatives: 2-azahomo[60]fullereno- (1) nitropyrimidine, (2)-phosphate, (3)-isocyanurate derivatives and five poly(amino)[60]fullerenes has been synthesized. Composite materials based on blends of conjugated polymer poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene (MEH-PPV) and new fullerene derivatives have been studied. We have found that the photoluminescence of MEH-PPV is quenched by a small admixture of the fullerene derivative which assumes a high efficiency of charge separation in the composite material. Photovoltaic (PV) devices based on MEH-PPV/(1) blends have been studied.

A flash-lamp pumped passively mode-locked neodymium-doped vanadate lasers operated at 1.34 μm wavelength have been developed using a novel saturable absorber consisted of single-wall carbon nanotubes incorporated in a polymer matrix. Laser pulses with the output energy up to 50 μJ and the duration of 30 ps were generated.

Polymer composite films were prepared on the basis of poly(vinyl ethylal) doped with a low concentration of an anionic polymethine dye that absorbs light in the near IR region and a higher concentration of 2,4,5,7-tetranitro-9-fluorenone or tetrakis(benzylamino)octahydrofullerene organic acceptor. The photoconductivity of the polymer composite films increases on passing to fullerene derivatives. The main reason for this effect is a decrease in the influence of steric factors on intermolecular electronic transitions in the case of the near-spherical structure of acceptor molecules as compared with the planar structure.

Features of the photoconductivity of films of composites based on [2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] with additions of zinc 2,3,9,10,16,17,23,24-octabutylphthalocyanine and C60 were studied. Luminescence quenching and an increase in the photoconductivity with the addition of C60 to their composition were detected. The increase in the photoconductivity is connected with the capture of electrons and their transport along the C60 molecules.

Modification of a method for processing positive ion ionization efficiency curves of polyatomic molecules, as developed earlier by Mark and coworkers, has been described. Based on the method, the first, second, and third ionization energies of C 60 have been re-examined and found to be in excellent agreement with the most reliable literature data. The ionization energies for C 60 H 18 and C 60 H 36 have been measured for the first time and were established as 7.3±0.3 eV and 7.01±0.25 eV, respectively. Although the appearance energy of C 60 H 36 2+ (18.7±0.2 eV) has been determined to be lower than that of C 60 2+ (18.98±0.35 eV), the reverse scenario is true for the second ionization energies of C 60 H 36 and C 60 .

A new method of a carbon nanotube purity estimation has been developed on the basis of Raman spectroscopy. The spectra of carbon soot containing different amounts of nanotubes were registered under heating from a probing laser beam with a step-by-step increased power density. The material temperature in the laser spot was estimated from a position of the tangential Raman mode demonstrating a linear thermal shift (-0.012 cm-1/K) from the position 1592 cm-1 (at room temperature). The rate of the material temperature rise versus the laser power density (determining the slope of a corresponding graph) appeared to correlate strongly with the nanotube content in the soot. The influence of the experimental conditions on the slope value has been excluded via a simultaneous measurement of a reference sample with a high nanotube content (95 vol. %). After the calibration (done by a comparison of the Raman and the transmission electron microscopy data for the nanotube percentage in the same samples) the Raman-based method is able to provide a quantitative purity estimation for any nanotube-containing material.

We have presented and demonstrated efficient mode locking of erbium doped fiber laser using graphene carboxymethylcellulose (CMC) polymer composites. The laser gives out soliton pulse with duration of ∼837 fs, and 0.19 nJ pulse energy.

Thermal behavior of two hydrofullerenes, C 60 H 36 and C 60 H 18 , was studied by means of Knudsen cell mass-spectrometry and infrared spectroscopy. Vapor pressures and enthalpies of sublimation at T =550–685 K were measured. Sublimation of the hydrofullerenes was accompanied by partial loss of hydrogen. Decomposition of C 60 H 36 was confirmed to be a stepwise process with formation of C 60 H 18 as an intermediate product. The material of the Knudsen cell strongly affected the partial pressures and mass-spectra of the hydrofullerene vapor species.

Fullerene hydrides of C60H18, C60H36 and C70H36 are studied by using IR, 1H and 13C NMR, X-ray photoelectron and electron energy loss spectroscopies, and magnetochemistry. The comparison of IR and solid state 1H and 13C NMR data for C60H36 with the theoretical ones allows the suggestion that fullerene hydride has a T symmetric structure and contains 4 isolated benzenoid rings located at tetrahedral positions on the surface of a closed skeleton of the molecule. The EELS revealed that the transition from fullerene to the hydride is accompanied by the decrease of the density of valence electrons. Magnetization measurements showed C60H36 to be a ferromagnet. The hydrogenated fullerenes were prepared by transfer hydrogenation procedures involving 9,10-dihydroanthracene. The compositions of the hydrides are determined by field desorption mass-spectral analysis.

Fullerene hydrides were prepared by hydrogenation of fullerences C60 and C70 using proton transfer from 9,10-dihydroanthracene to fullerene and were studied by mass spectrometry (electron impact, field desorption), IR, UV, and1H and13C NMR spectroscopy. The main product of the hydrogenation of C60 is C60H36, which is sufficiently stable. Hydrogenation of fullerene C70 gives a series of polyhydrides C70H n (n=36–46), and the main product is C70H36. The dehydrogenation of C60H36 by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone is not quantitative and results in the formation of fullerene derivatives along with C60. The comparison of the IR and1H and13C NMR spectral data for solid C60H36 with the theoretical calculations suggests that the fullerene hydride has aT-symmetric structure and contains four isolated benzenoid rings located at tetrahedral positions on the surface of the closed skeleton of the molecule.

Saturable absorption of polymer film composites with single-walled carbon nanotubes (SWNTs) and multilayer graphene (GR) were studied by Z- and P-scan methods with femtosecond probing pulses at a wavelength of 1.06 μm. As a matrix for the composite film, a polymer carboxymethylcellulose (CMC) was used. For these composites, the dependence of transmittance on peak intensity of a probe pulse was shown. The values of saturation intensities for the GR-CMC and SWNT-CMC composites were determined by the different methods. The intensities at which optical damage of the composites occurs were estimated.

It is shown by near-IR that the anion radicals C 70 − and C 70 2- are formed in vacuum by interaction between the fullerenes C 70 and 1-amino-3-propanol (AP) and 1,5-diaminopentane (DAP). The temperature dependence of the ESR spectra for the systems C 60 -AP, C 70 -AP and C 70 -DAPA were studied. At low temperature (15–45 K) the ESR spectrum for C 60 − is similar to that for species with an axially symmetric g-factor . The anisotropy of the signals is averaged out with increasing temperature. The averaged line broadens with further temperature growth, the sharp signal at g = 2.0001 being superimposed on this wide line. The ESR spectrum in the system C 70 -AP at 12.5 K may be tentatively described as a superposition of two ESR spectra, namely the ESR of a radical (assumed to be a cation radical) and of C 70 − .

The picosecond transient grating technique has been used to study the rotational reorientation of C 60 in various solvents: in toluene 7± 1.5 ps, o -dichlorobenzene 10.3± 1.5 ps, o -xylene 13±2 ps and in decalin 3.5± 1.5 ps. The data obtained cannot be described by hydrodynamic Debye theory. Rough-sphere fluid theory predicts the correct values for C 60 rotation in toluene, o -dichlorobenzene and in decalin. The deviations for o -xylene are probably connected with the specifics of the local solvent structure or with the stronger interaction of C 60 with solvent molecules. The rotation of C 60 in decalin is rapid and approaches the rotation in the gas phase determined by inertia.

A comparative analysis of the purification methods for single-walled carbon nanotubes (SWNTs) obtained by electric-arc-discharge synthesis is carried out. The purification methods include air oxidation of the initial material at various temperatures, treatment and/or oxidation in solutions of inorganic acids, microfiltration of the suspension of the initial and/or oxidized materials, and various combinations of these methods. The purity of the SWNTs obtained is determined with the help of Raman spectroscopy. It is shown that the best results can be obtained using a purification method including the following consecutive stages: treatment and oxidation of the initial material in nitric acid, microfiltration of the suspension of the oxidized material in aqueous solutions of surface-active substances through track membranes, drying, air oxidation, and vacuum annealing at various temperatures. The purity of the SWNTs obtained attains 70–80%.

Nonlinear optical absorption of single-wall carbon nanotubes in carboxymethylcellulose (CMC) thin polymer film has been studied by the Z-scan method. Nonlinear saturated absorption at lambda=1080 nm was registered with saturation intensity of 170 MW/cm(2). Ultrashort pulses with duration of 3 ps were generated at lambda=1055 nm using this composite polymer film as a saturable absorber for passive mode locking in a neodymium glass laser.

We report a ring-cavity thulium fiber laser mode locked with a single-wall carbon nanotube absorber used in transmission. A carboxymethyl cellulose polymer film with incorporated carbon nanotubes synthesized by the arc discharge method has an absorption coinciding with in the amplification bandwidth of a Tm-doped fiber. This laser is pumped by an erbium fiber laser at 1.57 microm wavelength and produces a 37 MHz train of mode-locked 1.32 ps pulses at 1.93 microm wavelength with an average output power of 3.4 mW.

We report poor fluorinated graphene sheets produced by thermal exfoliation embedding in carboxymethylcellulose polymer composite (GCMC) as an efficient mode locker for erbium doped fiber laser. Two GCMC mode lockers with different concentration have been fabricated. The GCMC based mode locked fiber laser shows stable soliton output pulse shaping with repetition rate of 28.5MHz and output power of 5.5 mW was achieved with the high concentration GCMC, while a slightly higher output power of 6.9 mW was obtained using the low concentration GCMC mode locker.

We report mode locking in a Ti:sapphire (Ti:Sa) laser at the wavelength of 810 nm using a polymer film with single-walled carbon nanotubes (SWNTs) applied as a saturable absorber. Pulses with 600 fs duration and 0.4 nJ energy were generated from the Ti:Sa laser with polymer-SWNT composite film for cw passive mode locking.

A mode-locked soliton erbium-doped fiber laser generating 177fs pulses is demonstrated. The laser pumped by a 85mW, 980nm laser diode emits 7mW at 1.56μm at a pulse repetition rate of 50MHz. Passive mode locking is achieved with a saturable absorber made of a high-optical quality film based on cellulose derivative with dispersed carbon single-wall nanotubes. The film is prepared with the original technique by using carbon nanotubes synthesized by the arc-discharge method.

This paper discusses the spectroluminescence, electro-, and photoconductive properties of films of poly [2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-vinylene] with additives of neutral and intraionic organic dyes, which absorb and reradiate the light in the near-IR region. The sensitization of the inner photoelectric effect is explained by the photogeneration of charge carriers from the dye molecules. Luminescence quenching and an increase of the photoconductivity of the films are detected when fullerene C60 is added to them. The photoconductivity increase is associated with the capture of electrons and their transport over the C60 molecules.

Fullerene deuteride was obtained by the reaction of deuterium with solid palladium fulleride C60Pd4.9 under fairly mild conditions. The compound was identified by FD-MS, UV-Vis and IR spectroscopies, and TLC.

Results from electron energy loss, X-ray photoelectron, and infrared spectroscopies are ptesented for the C 60 ·2S 8 compound. As one goes from C 60 to C 60 ·2S 8 , binding energy decreases by 0.5 eV, and ( σ + π ) plasmon energy decreases by 1.2 eV. Arguments for charge redistribution are performed.