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Fullerene C60

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https://www.readbyqxmd.com/read/28228000/c60-fullerene-as-promising-therapeutic-agent-for-the-prevention-and-correction-of-skeletal-muscle-functioning-at-ischemic-injury
#1
D M Nozdrenko, D O Zavodovskyi, T Yu Matvienko, S Yu Zay, K I Bogutska, Yu I Prylutskyy, U Ritter, P Scharff
The therapeutic effect of pristine C60 fullerene aqueous colloid solution (C60FAS) on the functioning of the rat soleus muscle at ischemic injury depending on the time of the general pathogenesis of muscular system and method of administration C60FAS in vivo was investigated. It was found that intravenous administration of C60FAS is the optimal for correction of speed macroparameters of contraction for ischemic muscle damage. At the same time, intramuscular administration of C60FAS shows pronounced protective effect in movements associated with the generation of maximum force responses or prolonged contractions, which increase the muscle fatigue level...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28225028/stacking-multiple-connecting-functional-materials-in-tandem-organic-light-emitting-diodes
#2
Tao Zhang, Deng-Ke Wang, Nan Jiang, Zheng-Hong Lu
Tandem device is an important architecture in fabricating high performance organic light-emitting diodes and organic photovoltaic cells. The key element in making a high performance tandem device is the connecting materials stack, which plays an important role in electric field distribution, charge generation and charge injection. For a tandem organic light-emitting diode (OLED) with a simple Liq/Al/MoO3 stack, we discovered that there is a significant current lateral spreading causing light emission over an extremely large area outside the OLED pixel when the Al thickness exceeds 2 nm...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28221040/magnetic-fullerene-dna-hyaluronic-acid-nanovehicles-with-magnetism-reduction-dual-responsive-triggered-release
#3
Ling Wang, Yitong Wang, Jingcheng Hao, Shuli Dong
We create the dual-responsive nanovehicle that can effectively combine and abundantly utilize magnetic and glutathione (GSH)-reductive triggers to control the drug delivery and achieve more intelligent and powerful targeting. In the nanovehicles, paramagnetic fullerene (C60@CTAF) was prepared via one-step modification of fullerene with magnetic surfactant CTAF by hydrophobic interaction for the first time. The perfect conjugation of C60 and CTAF increased the solubility or dispersity of fullerenes and qualify CTAF with more powerful assembly capability with DNA...
February 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28218822/single-molecular-junction-study-on-h2o-c60-h2o-is-electrostatically-isolated
#4
Satoshi Kaneko, Yoshifumi Hashikawa, Shintaro Fujii, Yasujiro Murata, Manabu Kiguchi
A water molecule exhibits characteristic properties on the basis of hydrogen-bondings. In the past decade, a single water molecule placed in the non-hydrogen-bonding environment has attracted growing attention. To reveal fundamental properties of a single water molecule, endohedral fullerene H2O@C60 becomes an ideal and suitable model. We examined the electronic properties of H2O@C60 by applying the single-molecule measurement. The conductance of a single molecular junction based on H2O@C60 was found to be comparable with that of empty C60...
February 20, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28217799/determination-of-the-equilibrium-constant-of-c60-fullerene-binding-with-drug-molecules
#5
Andrei A Mosunov, Irina S Pashkova, Maria Sidorova, Artem Pronozin, Anastasia O Lantushenko, Yuriy I Prylutskyy, John A Parkinson, Maxim P Evstigneev
We report a new analytical method that allows the determination of the magnitude of the equilibrium constant of complexation, Kh, of small molecules to C60 fullerene in aqueous solution. The developed method is based on the up-scaled model of C60 fullerene-ligand complexation and contains the full set of equations needed to fit titration datasets arising from different experimental methods (UV-Vis spectroscopy, (1)H NMR spectroscopy, diffusion ordered NMR spectroscopy, DLS). The up-scaled model takes into consideration the specificity of C60 fullerene aggregation in aqueous solution and allows the highly dispersed nature of C60 fullerene cluster distribution to be accounted for...
February 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28211322/incubation-of-solid-state-c60-fullerene-under-uv-irradiation-mimicking-environmentally-relevant-conditions
#6
Andrea Carboni, Rick Helmus, John R Parsons, Karsten Kalbitz, Pim de Voogt
Carbon-based nanomaterials, such as C60 fullerenes, are expected to accumulate in soil due to direct release and deposition from the atmosphere. However, little is known about the environmental fate of these nanoparticles which may be susceptible to photochemical and microbial degradation. In the present work, C60 was incubated for a period of 28 days and irradiated with UVA light. Three experiments were carried out where the fullerenes were either spiked onto a glass surface or added to quartz sand or sandy soil samples...
February 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28194929/a-ruthenium-complex-porphyrin-fullerene-linked-molecular-pentad-as-an-integrative-photosynthetic-model
#7
Masanori Yamamoto, Jens Föhlinger, Jonas Petersson, Leif Hammarström, Hiroshi Imahori
A ruthenium complex, porphyrin sensitizer, fullerene acceptor molecular pentad has been synthesized and a long-lived hole-electron pair was achieved in aqueous solution by photoinduced multistep electron transfer: Upon irradiation by visible light, the excited-state of a zinc porphyrin ((1) ZnP*) was quenched by fullerene (C60 ) to afford a radical ion pair, (1,3) (ZnP(.+) -C60(.-) ). This was followed by the subsequent electron transfer from a water oxidation catalyst unit (Ru(II) ) to ZnP(.+) to give the long-lived charge-separated state, Ru(III) -ZnP-C60(...
February 14, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28191973/density-functional-study-on-the-intercalation-of-fullerenes-into-ane-pv-copolymer-layers
#8
Chuan-Ding Dong, Wichard J D Beenken
We investigated the intercalation of C60 into poly(p-anthracene-ethynylene)-alt-poly(p-phenylene-vinylene) copolymers layers by density functional theory calculations in respect of crystal structures and electronic band structures. Based on the experimental observations, we found that the copolymer with branched side chains substituted next to the anthracene units and the linear side chains substituted to the vinylene units has a better tendency to intercalate with C60 than the reversely substituted copolymer...
February 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28179157/the-influence-of-cell-and-nanoparticle-properties-on-heating-and-cell-death-in-a-radiofrequency-field
#9
Yuri Mackeyev, Colette Mark, Natasha Kumar, Rita E Serda
: The use of non-invasive radiofrequency (RF) energy to induce mild thermal and non-thermal effects in cancer tissue is under study as an adjuvant to chemo, radio or immuno therapy. This study examines cell specific sensitivities to RF exposure and the potential of nanoparticles to elevate heating rates or enhance biological effects. Increases in the heating rate of water in an RF field operating at 13.56MHz (0.004-0.028°C/s) were positively correlated with concentration of hybrid nanoparticles (1-10mg/ml) consisting of water soluble malonodiserinolamide [60]fullerene (C60-ser) conjugated to the surface of mesoporous silica nanoparticles (SiO2-C60)...
February 5, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28168245/linear-scaling-density-functional-simulations-of-the-effect-of-crystallographic-structure-on-the-electronic-and-optical-properties-of-fullerene-solvates
#10
Hong-Tao Xue, Gabriele Boschetto, Michal Krompiec, Graham E Morse, Fu-Ling Tang, Chris-Kriton Skylaris
In this work, the crystal properties, HOMO and LUMO energies, band gaps, density of states, as well as the optical absorption spectra of fullerene C60 and its derivative phenyl-C61-butyric-acid-methyl-ester (PCBM) co-crystallised with various solvents such as benzene, biphenyl, cyclohexane, and chlorobenzene were investigated computationally using linear-scaling density functional theory with plane waves as implemented in the ONETEP program. Such solvates are useful materials as electron acceptors for organic photovoltaic (OPV) devices...
February 7, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28157324/monolayer-of-hydrazine-facilitates-the-direct-covalent-attachment-of-c60-fullerene-to-a-silicon-surface
#11
Fei Gao, Andrew V Teplyakov
The development of oxygen-free organic-inorganic interfaces has led to new schemes for the functionalization of silicon surfaces with nitrogen-based chemical groups. However, building layers of large structures directly on this functionalized surface has remained elusive. This work confirms the path to form a stable interface between silicon and buckminsterfullerene C60 based on covalent chemical bonds. The starting point for this modification is the hydrazine-reacted Si(111) surface with the diamine functionality, which is further reacted directly with the C60 molecules...
February 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28150895/directly-attached-bisdonor-bf2-chelated-azadipyrromethene-fullerene-tetrads-for-promoting-ground-and-excited-state-charge-transfer
#12
Francis D'Souza, M A Collini, M J Thomas, V Bandi, P A Karr
The efficiency and mechanism of electron- and energy transfer events occurring in both in natural and synthetic donor-acceptor systems depend on their distance, relative orientation, and the nature of the surrounding media. Fundamental knowledge gained from model studies is key in building efficient energy harvesting and optoelectronic devices. In our continued effort to build donor-acceptor systems using near-IR sensitizers, in the present study, we report ground and excited state charge transfer in newly synthesized, directly linked, tetrads featuring bisdonor (donor = phenothiazine and ferrocene), BF2-chelated azadipyrromethane (azaBODIPY) and C60 entities...
February 2, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28145895/evidence-of-interface-exchange-magnetism-in-self-assembled-cobalt-fullerene-nanocomposites-exposed-to-air
#13
V Lavrentiev, A Stupakov, I Lavrentieva, M Motylenko, M Barchuk, D Rafaja
We report on the establishing of an exclusive magnetic effect in air-exposed CoxC60 nanocomposites (x > 2) created through self-assembling in the depositing mixture. In order to verify the influence of ambient air on the CoxC60 mixture film, we have studied in detail the film magnetization at rather low temperatures, which provides their ferromagnetic behavior. Tracing the possible exchange bias effect, we distinguished a clear vertical shift of the hysteresis loops recorded for the air-exposed CoxC60 films in the field cooling (FC) regime...
February 1, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28115144/complex-interplay-between-formation-routes-and-natural-organic-matter-modification-controls-capabilities-of-c60-nanoparticles-nc60-to-accumulate-organic-contaminants
#14
Lei Hou, John D Fortner, Ximeng Wang, Chengdong Zhang, Lilin Wang, Wei Chen
Accumulation of organic contaminants on fullerene nanoparticles (nC60) may significantly affect the risks of C60 in the environment. The objective of this study was to further understand how the interplay of nC60 formation routes and humic acid modification affects contaminant adsorption of nC60. Specifically, adsorption of 1,2,4,5-tetrachlorobenzene (a model nonionic, hydrophobic organic contaminant) on nC60 was greatly affected by nC60 formation route - the formation route significantly affected the aggregation properties of nC60, thus affecting the available surface area and the extent of adsorption via the pore-filling mechanism...
January 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28112951/molecular-tuning-of-the-vibrational-thermal-transport-mechanisms-in-fullerene-derivative-solutions
#15
Chester J Szwejkowski, Ashutosh Giri, Ronald Warzoha, Brian F Donovan, Bryan Kaehr, Patrick E Hopkins
Control over the thermal conductance from excited molecules into an external environment is essential for the development of customized photothermal therapies and chemical processes. This control could be achieved through molecule tuning of the chemical moieties in fullerene derivatives. For example, the thermal transport properties in the fullerene derivatives indene-C60 monoadduct (ICMA), indene-C60 bisadduct (ICBA), [6,6]-phenyl C61 butyric acid methyl ester (PCBM), [6,6]-phenyl C61 butyric acid butyl ester (PCBB), and [6,6]-phenyl C61 butyric acid octyl ester (PCBO) could be tuned by choosing a functional group such that its intrinsic vibrational density of states bridge that of the parent molecule and a liquid...
February 1, 2017: ACS Nano
https://www.readbyqxmd.com/read/28112436/reversible-c60-ejection-from-a-metallocage-through-the-redox-dependent-binding-of-a-competitive-guest
#16
Cedric Colomban, György Szalóki, Magali Allain, Laura Gómez, Sébastien Goeb, Marc Sallé, Miquel Costas, Xavi Ribas
The reversible encapsulation of a tetrapyridyl exTTF-based ligand (m-Py)exTTF by a tetragonal Zn-porphyrin-based prismatic nanocage (1) is described. The reversible uptake and release of the (m-Py)exTTF guest proceeds via drastic electronic and conformational changes occurring upon oxidation of the latter. This reversible system has been explored in a guest exchange process, by addition of (m-Py)exTTF to the host-guest complex [C601], leading to fullerene C60 ejection from the host cavity. Remarkably, the subsequent redox-triggered ejection of (m-Py)exTTF, leads to the recovery of the empty cage 1, which remains available for further C60 encapsulation...
January 23, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28111656/palladium-catalyzed-synthesis-of-60-fullerene-fused-benzofurans-via-heteroannulation-of-phenols
#17
Fei Li, Jun-Jie Wang, Guan-Wu Wang
Palladium-catalyzed heteroannulation of [60]fullerene with phenols has been developed as a practical and efficient protocol for the one-pot synthesis of various [60]fullerene-fused benzofurans. A possible reaction mechanism is proposed to explain the formation of C60-fused benzofurans. A novel 1,2,3,16-adduct is obtained through further reaction of the electrochemically generated dianionic fullerobenzofuran with benzyl bromide.
January 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28110183/noncovalent-interaction-assisted-fullerene-for-the-transportation-of-some-brain-anticancer-drugs-a-theoretical-study
#18
Pabitra Narayan Samanta, Kalyan Kumar Das
The treatment of brain cancer like glioblastoma multiforme often uses chemotherapeutic drugs like temozolomide, procarbazine, carmustine, and lomustine. Fullerene loaded with these drugs help to cross the blood brain barriers. The adsorptions of the four drug molecules on the surface of the fullerene are studied mostly by using density functional theory (DFT) based method at the M06-2X/6-31G(d) level of calculations. In all four cases, the estimated interactions are noncovalent type and the average adsorption energy lies in between -5 and -11kcal/mol in the gas phase...
January 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28099015/intersystem-crossing-rates-of-isolated-fullerenes-theoretical-calculations
#19
Yuxiu Liu, Minsong Lin, Yi Zhao
Although the triplet states of fullerenes have prosperous applications, it remains unclear how the structural parameters of singlet and triplet states control the intersystem crossing (ISC) rates. Here, electronic structure calculations (reorganization energy, driving force, and spin-orbit coupling) and a rate theory (Marcus formula) are employed to quantitatively predict the ISC rates of isolated fullerenes Cn (n = 60-110). The results demonstrate that the driving force is not the only factor to predict the ISC rates...
February 9, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28091953/fullerene-c60-penetration-into-leukemic-cells-and-its-photoinduced-cytotoxic-effects
#20
D Franskevych, K Palyvoda, D Petukhov, S Prylutska, I Grynyuk, C Schuetze, L Drobot, O Matyshevska, U Ritter
Fullerene C60 as a representative of carbon nanocompounds is suggested to be promising agent for application in photodynamic therapy due to its unique physicochemical properties. The goal of this study was to estimate the accumulation of fullerene C60 in leukemic cells and to investigate its phototoxic effect on parental and resistant to cisplatin leukemic cells. Stable homogeneous water colloid solution of pristine C60 with average 50-nm diameter of nanoparticles was used in experiments. Fluorescent labeled C60 was synthesized by covalent conjugation of C60 with rhodamine B isothiocyanate...
December 2017: Nanoscale Research Letters
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