1701-93-5Relevant academic research and scientific papers
Bis(ethylenedithio)tetrathiafulvalene Cation Radical Salts Composed of Nonuniform Silver(I) Complex Polyanions
Yoshida, Yukihiro,Maesato, Mitsuhiko,Nakamura, Yuto,Ishikawa, Manabu,Yamochi, Hideki,Saito, Gunzi,Kishida, Hideo,Kitagawa, Hiroshi
, p. 16703 - 16711 (2019)
Rational control of the molecular arrangement in solids has been the subject of intense research for many years. In particular, the structural control of bis(ethylenedithio)tetrathiafulvalene (ET) radical cations has attracted special interest because of the primary effect on the electronic properties of the salts. In this study, we obtained the first ET cation radical salts formed with nonuniform silver(I) complex polyanions, which involve multiple kinds of openings in the anionic layer, by an electrocrystallization method. θ-(ET)2Ag2(CN)[N(CN)2]2 (1) with a θ-type ET packing motif contains double helical chains composed of AgN(CN)2, whereas α″-(ET)2Ag2(CN)(SCN)2 (2) with an α″-type ET packing motif contains zigzag ladders composed of AgSCN. Both silver(I)-based tube-like assemblies are connected to each other by a cyano group, affording nonuniform polyanionic structures. Although both salts show semiconducting behavior, there is a distinct difference in their spin geometry, with an S = 1/2 Heisenberg antiferromagnetic square lattice in 1, which is associated with charge disproportionation or dynamical charge fluctuation in the ET layers, and an S = 1/2 Heisenberg anisotropic triangular lattice in 2, which results in spin frustration in the ET layers. The ability of the nonuniform polymeric structures in the anionic layers to act as templates for various arrangements of ET radical cations is demonstrated.
Hydrates of Organic Compounds. VII. The Effect of Anions on the Formation of Clathrate Hydrates of Tetrabutylammonium Salts
Nakayama, Haruo
, p. 877 - 880 (1983)
Phase diagrams of the binary mixtures of tetrabutylammonium salt nX (X = NO2, NO3, BrO3, ClO3, IO3, ClO4, MnO4, and NCS for n = 1; X = CO3, SO4, WO4, and CrO4 for n = 2; and X = PO4 for n = 3) with water were determined over the temperature range between -10 and +50 deg C.From these diagrams the following results were obtained: (1) the formation of a clathrate-like hydrate for salts having such anions as NO2-, NO3-, BrO3-, ClO3-, IO3-, SO42- and PO43- was newly confirmed; (2) the melting point of the clathrate hydrate of the salt with monovalent anion was appreciably influenced by the kind of anion; (3) in the hydrates of the salt having either di- or trivalent anions, the melting points were relatively high and were only slightly affected by the kind of anion; (4) the crystal structure of these hydrates was essentially the same as that of the tetrabutylammonium fluoride hydrate, judging from the hydration numbers; (5) the solubilities in water of both permanganate and perchlorate were markedly lower than that of the iodide; and (6) in the thiocyanate system a phase separation into two liquid phases was observed at temperatures higher than +3.5 deg C.The effect of a monovalent anion on the stability of the clathrate hydrate was discussed in connection with the conventional partial molal volume of the anion.
Spectrochemistry of Solutions. Part 14. Raman and Infrared Sectra of Thiocyanatosilver(I) Complexes in Some Non-aqueous Solutions
Gans, Peter,Gill, J. Bernard,Fearnley, D. Peter
, p. 1708 - 1713 (1981)
Infrared and Raman spectra have shown that, when Ag(1+) is complexed by SCN(1-), the species present and the equilibrium steps involved are solvent specific.In pyridine, complexation of Ag(1+) by SCN(1-) passes through (1+) and AgSCN to (1-).Only AgSCN and (1-) have been identified in tetrahydrofuran, dimethyl sulphoxide, and acetone, and only (1-) was found in propylene carbonate.Solutions in dimethylformamide and dimethylacetamide at high /ratios contain a small proportion of the SCN(1-) in the bridged complex (1-), but in trimethyl phosphate the SCN(1-) is approximately equally distributed between (1-) and (1-).The spectra of thiocyanatosilver(I) complexes in hexamethylphosphoramide differ from those of all the other solutions; no linear (1-) complex is found and two feasible explanations of the spectra are offered.No complex higher than (1-) occurs in any of these solutions.
Unprecedented μ-1,2,3κS : 4,5κN coordination mode of the thiocyanate anion in two new double salts of silver(I), AgSCN·2AgNO3 and AgSCN·AgClO4
Guo, Guo-Cong,Mak, Thomas C.W.
, p. 813 - 814 (1999)
The double salts AgSCN·2AgNO3 and AgSCN·AgClO4 both feature an unprecedented μ5-1,2,3κS : 4,5κN coordination mode of the thiocyanate ligand, which generates a two- or three-dimensional network according to the relative coordinating capability of the co-existing nitrate or perchlorate anion.
The synthesis of rare earth metal-doped upconversion nanoparticles coated with d-glucose or 2-deoxy-d-glucose and their evaluation for diagnosis and therapy in cancer
Sharma, K. Shitaljit,Thoh, Maikho,Dubey, Akhil K.,Phadnis, Prasad P.,Sharma, Deepak,Sandur, Santosh K.,Vatsa, Rajesh K.
, p. 13834 - 13842 (2020/09/07)
Rare earth metal-doped upconversion nanoparticles (UCNPs) are emerging as a new class of biomedical imaging materials due to their higher energy anti-Stokes shift, high optical penetration depth and long term repetitive imaging. In the present study, upconversion nanoparticles based on NaYF4 doped with thulium (Tm) and ytterbium (Yb) were prepared via a thermolysis method using oleic acid as a capping agent and 1-octadecene as a solvent. The X-ray diffraction pattern of the synthesized nanoparticles was found to match the standard hexagonal phase. The nanoparticles were coated with silica using tetraethyl orthosilicate (TEOS) and in order to avoid agglomeration, IGEPAL CO-520 was used as the surfactant. The coatings of SiO2 over NaYF4 were confirmed by the TEM image and XRD pattern. NaYF4@SiO2 was further functionalized by the addition of (3-aminopropyl)trimethoxysilane (APTMS) followed by either d-glucose or 2-deoxy-d-glucose (2-DG). UCNPs-d-glucose and UNCPs-2DG were examined for cell viability (MCF-7 cells) by MTT assay. The cellular uptake of UCNPs in MCF-7 cells was seen in terms of emission of a blue light. Furthermore, the uptake rate of UCNPs coated with 2-deoxy-d-glucose was found to be much faster than that of UCNPs alone under d-glucose starved conditions. The functionalization of UCNPs with 2-deoxy-d-glucose (2-DG) not only increased the uptake of nanoparticles, but also blocked the glycolysis pathway resulting in the inhibition of tumor growth as 2-deoxy-d-glucose (2-DG) is mimicking the d-glucose. The results are indicative that these upconversion nanoparticles may find applications in bio-imaging, removal of tumor by precision surgery, therapy and targeted drug delivery. This journal is
NOVEL COMPOUND AND EPOXY RESIN COMPOSITION CONTAINING THE SAME
-
Paragraph 0037, (2016/10/07)
PROBLEM TO BE SOLVED: To provide an epoxy resin composition excellent in storage stability and curability. SOLUTION: A compound represented by the general formula (I) is used as a curing agent for an epoxy resin. In the formula (I), R1 is a hydrocarbon group capable of containing a nitrogen atom and forming a cyclic structure capable of having a substitution, R2 represents a hydrogen atom, an alkyl group or an aryl group or can form an unsaturated bond together with R1, and R3 represents a hydrogen atom, an alkyl group or an aryl group. COPYRIGHT: (C)2016,JPOandINPIT
Synthesis and characterization of AgSCN micro/nanostructures by sonochemical method
Soofivand,Salavati-Niasari,Mohandes,Saberyan,Avanes, Armen
, p. 1191 - 1198 (2015/04/14)
Silver (I) salicylate complex marked as [Ag(HSal)] was prepared, characterized, and applied to fabricate AgSCN micro/nanostructures. The [Ag(HSal)] complex was synthesized by silver nitrate and sodium salicylate via a simple precipitation route. To obtain AgSCN micro/nanostructures, the [Ag(HSal)] complex and KSCN were mixed with molar ratio of 1:1 in the presence of ultrasound irradiation. Besides, the effect of sonication time and surfactant on the morphology and particle size of the products was investigated. In this work, polyvinyl pyrrolidone was used as surfactant to prepare star-like and flower-like AgSCN microstructures. The products were analyzed by FT-IR, XRD, EDS, SEM, and TEM.
Synthesis and structures of triorganotelluronium pseudohalides
Klapoetke, Thomas M.,Krumm, Burkhard,Mayer, Peter,Piotrowski, Holger,Schwab, Ingo,Vogt, Martin
, p. 2701 - 2709 (2007/10/03)
The syntheses of [(CH3)3Te]X {X = N3 (1), OCN (2), SCN (3), SeCN (4), [Ag(CN)2] (5)} and [(C6H5)3Te]X {X = N3 (6), SeCN (7), [Ag(CN)2] (8)}, their NMR spectroscopic data, vibrational spectra and single crystal structures are described. Compounds 1-4 are the first trimethyltelluronium pseudohalides, while the known compounds 6 and 7 have been prepared for completion of their analytical and structural properties. The occurrence of intermolecular Te···N, Te···O, Te···S and Te···Se contacts is thoroughly studied. The dicyanoargentates 5 and 8 were obtained in an attempt to prepare telluronium cyanides. Low-temperature 13C NMR spectroscopy of the [Ag(CN)2]- ion in solution has been carried out, with determination of the 13C-107/109Ag coupling. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
Synthesis and spectroscopic studies on some new pentafluorophenylantimony(III and V) derivatives
Saxena,Ranjan, Ashok
, p. 1579 - 1591 (2008/10/09)
The oxidative addition reaction of (C6F5)2SbCl with ICl and IN3 yielded (C6F5)2SbI(X)Cl (X = Cl, N3). (C6F5)2SbN3 and (C6F5)2SbCl(NCS)N3 were synthesized by the displacement reactions of (C6F5)2SbCl with NaN3 in the presence of 15-crown-5 or (C6F5)2SbI(N3)Cl with AgNCS, respectively. The reaction of bis(pentafluorophenyl)antimony(V) azido derivatives with PhNCS yielded the corresponding 1,2-cycloaddition products i.e., tetrazole-5-thiones The compounds were characterised by elemental analyses, UV, IR and 19F NMR spectroscopic studies.
Thermal decomposition of alkali metal, copper(I) and silver(I) thiocyanates
Ptaszyński,Skiba,Krystek
, p. 75 - 85 (2008/10/09)
Thermal decomposition of alkali metal thiocyanates of the general formula MSCN (M=Na, K, Rb, Cs), CuSCN and AgSCN has been studied. Thermal analysis curves and diffraction patterns of the solid intermediate, and final, products of their pyrolysis are pres
