Xi:Irritant;
7681-65-4Relevant articles and documents
Datta, R. L.,Sen, J. N.
, p. 750 - 759 (1917)
Nano-particulate CuI film formed on porous copper substrate by iodination
Yang, Yang,Li, Xuefei,Zhao, Bin,Chen, Huilan,Bao, Ximao
, p. 400 - 404 (2004)
A nano-particulate thin CuI film is fabricated by iodination of a porous copper substrate that was prepared by using an alumina mask and characteristic properties of these films are studied.
Highly Selective Fluorescent Probe Based on 2-(2′-Dansylamidophenyl)-Thiazole for Sequential Sensing of Copper(II) and Iodide Ions
Kim, Bo-Yeon,Pandith, Anup,Cho, Chan Sik,Kim, Hong-Seok
, p. 163 - 168 (2019)
A novel highly selective fluorescent probe based on 2-(2′-dansylamidophenyl)-4-phenylthiazole (1) is developed for sequential sensing of copper(II) and iodide ions in acetonitrile. The fluorescence mechanism is based on cation-induced inhibition of excited-state intramolecular hydrogen transfer, intramolecular charge transfer, and metal–ligand electron/charge transfer. Subsequent iodide-induced extrusion of copper(II) results in partial revival of fluorescence. Probe 1 and its ensemble with copper (II) show high selectivity for copper(II) and iodide ions, respectively, in acetonitrile solution.
Synthesis of nano-CuI and its catalytic activity in the thermal decomposition of ammonium perchlorate
Liu, Yaqing,Cheng, Yun,Lv, Shiqi,Liu, Chunsheng,Lai, Junling,Luo, Genxiang
, p. 3885 - 3892 (2015)
Nano-CuI was fabricated by an element-direct-reaction route at 40°C in acetonitrile, and used as a catalyst in the thermal decomposition of ammonium perchlorate. The effects of polyvinyl pirrolidone (PVP) as an additive in the preparation of the catalyst and the addition amount of the catalyst in thermal decomposition reaction on the catalytic activity were investigated. Meanwhile, the morphologies and composition of the catalyst were also identified by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that nano-CuI can remarkably decrease the higher decomposition temperature of ammonium perchlorate by more than 100°C, and that the temperature can be further reduced by using the nano-CuI catalyst with PVP as an additive in preparation. In addition, smaller crystallite size and increasing addition amount of nano-CuI in the thermal decomposition are favorable for improving its catalytic activity.
2D compound formation during copper dissolution: An electrochemical STM study
Broekmann,Hai,Wandelt
, p. 3971 - 3977 (2006)
The reversible formation of a 2D-CuI film on Cu(1 0 0) is studied by means of cyclic voltammetry in combination with electrochemical scanning tunneling microscopy. Exposing the Cu(1 0 0) electrode surface to an acidic and iodide containing electrolyte (5 mM H2SO4/1 mM KI) leads to the formation of a well ordered c(p × 2)-I adsorbate layer at potentials close to the onset of the anodic copper dissolution reaction. Copper dissolution starts at slightly more positive potentials preferentially at step edges in the presence of the iodide adlayer via the removal of copper material from kink sites at step edges. This increase of mobile Cu+ ions causes the local exceeding of the CuI solubility product (pKL = 11.3), thereby giving rise to the nucleation and growth of a laterally well ordered 2D-CuI film. Key structural motifs of the growing CuI film are closely related to the (1 1 1) plane of bulk CuI. Quite intriguing, the 2D-CuI film does not act as a passive layer. Copper dissolution proceeds even in the presence of this binary compound via an inverse step flow mechanism.
Synthesis, morphology, and optical properties of cui microcrystals
Shevchenko,Piskunovich,Zhuravkov,Bokshits
, p. 630 - 634 (2012)
We have studied the effect of synthesis conditions on the luminescence spectra of ultrafine CuI powders. The results demonstrate that synthesis conditions (the reductant of Cu2+, the anion of the copper(II) salt, initial solution concentrations, and the presence of a stabilizer) influence the size and shape of the forming CuI particles and, accordingly, their luminescence spectrum. The highest luminescence intensity near λmax ?720 nm (λex ?370 nm) is offered by regularly shaped tetrahedral particles 1.1-1.2 μm in average size. Pleiades Publishing, Ltd., 2012.
Dimorphism of a new Cul coordination polymer: Synthesis, crystal structures and properties of catena[Cul(2-iodopyrazine-N)] and poly[Cul(μ2-2-iodopyrazine-N,N′)]
Naether, Christian,Wriedt, Mario,Jess, Inke
, p. 2391 - 2397 (2003)
Two modifications of the new copper(I) iodide coordination polymer Cul(2-iodopyrazine) were obtained by the reaction of Cul and 2-iodopyrazine in acetonitrile. During this reaction, intensely yellow crystals of form I appear first which transform within several minutes to intensely red crystals of form II which is the thermodynamically most stable form at room temperature. In catena[Cul(2-iodopyrazine-N)] (form I; a = 4.1830 (6) A; b = -10.814 (1) A; c = 17.961 (4) A; V = 812.5 (2) A3; orthorhombic; P212121; Z = 4), corrugated Cul double chains are found in which each copper atom is coordinated by one additional 2-iodopyrazine ligand. In poly[Cul(μ-2-iodopyrazine-N, N′)] (form II; a = 4.2679 (5) A; b = 13.942 (2) A, c = 13.017 (2) A, b = 92.64 (1)°; V = 773.76 (2) A3; monoclinic; P21/c; Z = 4), Cul single chains occur which are connected via μ-N,N′ coordination by the 2-iodopyrazine ligands to layers parallel to (010). The thermal behavior of both forms was investigated using simultaneous differential thermoanalysis, thermogravimetry, and mass spectrometry as well as differential scanning calorimetry and temperature resolved X-ray powder diffraction. On heating, both forms decompose to copper(I) iodide, and the decomposition temperature of form I is significantly lower than that of form II. From all experiments, there is no indication of a phase transition of one form into the other or for the formation of a phase with lower amine content.
Nanophases in mechanochemically synthesized AgI-CuI system: Structure, phase stability and phase transitions
Mohan, D. Bharathi,Sunandana
, p. 1669 - 1677 (2004)
Nanoscale crystallites of Ag-rich (Ag1-xCuxI, x=0.05, 0.10, 0.15 and 0.25), Cu-rich (Cu1-yAgyI, y=0.05, 0.10, 0.15 and 0.25) and intermediate Ag1-xCuxI (x=0.50) solid solutions and end members AgI, CuI with sizes in the range of 46-13 nm were synthesized by attrition at ambient temperature in a soft mechanochemical reaction (MCR) of Ag, Cu and I. Monophasic γ-AgI (zincblende, a=638pm) with disordered Ag+ sublattice and the crystallite size of about ～31 nm was realized in the case of Ag0.75Cu0.25I (x=0.25) composition. Lattice parameter decreases linearly from 649 to 604pm with increasing Cu concentration in the AgI-CuI system validating Vegard's law. Smallest size (～13 nm) agglomerated nanocrystals were realized in the Cu-rich composition Cu0.75Ag0.25I (a=615pm), while unagglomerated uniform-sized (～17 nm) and spherical shape nanocrystallites of Ag0.50Cu0.50I (a=626pm) with maximum strain were synthesized for sensor applications using MCR. Differential scanning calorimetry study shows the systematic changes in the phase transition temperature with Cu substitution. Ag-rich composition posses less enthalpy (ΔH (x or Cu=0.05, 0.10, 0.15, 0.25)=6.0, 6.11, 6.6, 6.3 in kJ/mol) and entropy (ΔS (y or Ag=0.05, 0.10, 0.15, 0.25)=14.15, 14.1, 15.03, 13.6 in J/molK) when compared to undoped AgI (ΔH=9.63kJ/mol, ΔS=22.8J/molK) implying greater thermal stability of γ-phase due to Cu-strengthened Ag-I bond. Enhanced entropy (ΔS=8.17J/molK) in Cu0.75Ag0.25I (Cu-rich) solid solutions relative to CuI (ΔS=1.0J/molK) indicates Ag-induced cation disorder. Fifteen percent Ag-doped CuI (Cu0.85Ag0.15I) nanocrystals apparently behave like microscopic p-n junctions with currents in the range of 10-6-10-8A characterized by a non-linear I-V curve.
ESR study of the electronic properties of the new organic conductors κ-(BEDT-TTF)2Cu[N(CN)2]X, X = Br; I
Kataev,Winkel,Knauf,Gruetz,Khomskii,Wohlleben,Crump,Hahn,Tebbe
, p. 24 - 34 (1992)
The electron spin resonance data together with AC susceptibility and low field microwave absorption measurements are reported for the two organic conductors κ-(BEDT-TTF)2Cu[N(CN)2]X, with X = Br; I. The bromine containing salt is the
Preparation and characterization of CuI nanorods using Cu(dmg)2 as precursor via water-in-oil (w/o) microemulsions
Li, Xue-Liang,Zhu, Xiao-Yun,Duan, Ti-Lan,Qian, Yi-Tai
, p. 526 - 529 (2006)
CuI nanorods have been firstly prepared by water-in-oil microemulsions using Cu(dmg)2 as precursor at low temperature as low as 70 °C. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements show that the CuI nanorods are pure γ-phase crystals with diameters ranging from 50 to 80 nm and lengths up to 500 nm. UV-vis spectrum reveals that the nanorods exhibit a blue shift and possess of wider band gap energy. Electrochemical impedance spectroscopy (EIS) reveals the nanorods own larger grain boundary resistance. Results of comparative experiments indicate that the rod-like structure of Cu(dmg)2 crystals leads the CuI crystals growing in one direction especially and the reverse microemulsion system plays a crucial role in making products symmetrical and uniform.
Preparation of porous spherical CuI nanoparticles
Yang, Ming,Xu, Jin-Zhong,Xu, Shu,Zhu, Jun-Jie,Chen, Hong-Yuan
, p. 628 - 630 (2004)
Porous spherical CuI nanoparticles with an average diameter of 0.3-0.6 μm have been prepared by a simple reaction between CuO suspension, NH 2OH·HCl and KI in the presence of deionized gelatin at room temperature.
Wojakowska, A.
, p. 2433 - 2440 (1989)
2-Benzoylpyridine thiosemicarbazone as a novel reagent for the single pot synthesis of dinuclear CuI-CuII complexes: Formation of stable copper(ii)-iodide bonds
Lobana, Tarlok S.,Khanna, Sonia,Butcher, Ray J.
, p. 4845 - 4851 (2012)
2-Benzoylpyridine thiosemicarbazone {R1R2C 2N2·N3H-C1(S)-N 4H2, R1 = py-N1, R2 = Ph; Hbpytsc} with copper(i) iodide in acetonitrile-dichloromethane mixture has formed stable CuII-I bonds in a dark green CuII iodo-bridged dimer, [Cu2II(μ-I)2(η 3-N1,N2,S-bpytsc)2] 1. Copper(i) bromide also formed similar CuII-Br bonds in a dark green Cu II bromo-bridged dimer, [Cu2II(μ-Br) 2(η3-N1,N2,S-bpytsc) 2] 3. The formation of dimers 1 and 3 appears to be due to a proton coupled electron transfer (PCET) process wherein copper(i) loses an electron to form copper(ii), and this is accompanied by a loss of -N3H proton of Hbpytsc ligand resulting in the formation of anionic bpytsc-. When copper(i) iodide was reacted with triphenylphosphine (PPh3) in acetonitrile followed by the addition of 2-benzoylpyridine thiosemicarbazone in dichloromethane (Cu:PPh3:Hbpytsc in the molar ratio 1:1:1), both CuII dimer 1 and an orange CuI sulfur-bridged dimer, [Cu2II2(μ-S-Hbpytsc)2(PPh 3)2] 2 were formed. Copper(i) bromide with PPh3 and Hbpytsc also formed CuII dimer 3 and an orange CuI sulfur-bridged dimer, [Cu2IBr2(μ-S-Hbpytsc) 2(PPh3)2] 4. While complexes 2 and 4 exist as sulfur-bridged CuI dimers, 1 and 3 are halogen-bridged. The central Cu2S2 cores of 2 and 4 as well as Cu2X 2 of 1 (X = I) and 3 (X = Br) are parallelograms. One set of Cu II-I and CuII-Br bonds are short, while the second set is very long {1, Cu-I, 2.565(1), 3.313(1) A; 3, Cu-Br, 2.391(1), 3.111(1) A}. The Cu...Cu separations are long in all four complexes {1, 4.126(1); 2, 3.857(1); 3, 3.227(1); 4, 3.285(1) A}, more than twice the van der Waals radius of a Cu atom, 2.80 A. The pyridyl group appears to be necessary for stabilizing the CuII-I bond, as this group can accept π-electrons from the metal. The Royal Society of Chemistry 2012.
THE APPLICATION OF PHOTO-REDUCTION OF THIN CUPROUS IODIDE FILM FOR METAL IMAGE FORMATION
Shimidzu, Naoki,Masuda, Hideki,Ohno, Shin
, p. 961 - 964 (1984)
The surface chemical properties of cuprous-iodide (CuI) film evaporated on a polymer layer containing a precursor reducing agent, 2-isopropoxy-1,4-naphtoquinone (IPNQ), were markedly affected by UV irradiation.The CuI was reduced by photoproducts of the IPNQ and the surface reductants attracted the zinc vapor in a vacuum evaporation vessel.Thus the UV exposure resulted in the zinc vapor deposition.
Synthesis, structures and antimicrobial activity of copper derivatives of N -substituted imidazolidine-2-thiones: Unusual bio-activity against Staphylococcus epidermidis and Enterococcus faecalis
Lobana, Tarlok S.,Aulakh, Jaspreet K.,Sood, Heena,Arora, Daljit S.,Garcia-Santos, Isabel,Kaur, Manpreet,Duff, Courtney E.,Jasinski, Jerry P.
, p. 9886 - 9900 (2018)
The main objective of this study was to explore the antimicrobial activity of several copper(i) complexes with N,S-donor thio-ligands against Gram positive bacteria, namely Staphylococcus aureus (MTCC 740), Staphylococcus epidermidis (MTCC 435), and Enter
A thermoelectric copper-iodide composite from the pyrolysis of a well-defined coordination polymer
Bai, Shi-Qiang,Wong, Ivy Hoi Ka,Lin, Ming,Young, David James,Hor, T. S. Andy
, p. 5564 - 5569 (2018)
Coordination polymer 1 was prepared from CuI and a flexible [SNS] ligand L in acetonitrile. The thermal decomposition of 1 yielded a CuI-rich thermoelectric carbon composite 2, which is relatively light, thermally stable and robust. Composite 2 possesses high Seebeck coefficients (700-950 μV K-1) from rt to 204 °C after an optimization cycle.
Structural and NMR study of the lithiated defect thiospinels LixCu0.07[Ti2]S4 (0 < x < 2)
James, A. C. W. P.,Goodenough, J. B.,Clayden, N. J.
, p. 356 - 365 (1988)
Oxidative extraction of copper from the normal thiospinel Cu[Ti2]S4 followed by chemical lithiation of the resulting defect thiospinel enabled the metallic, lithiated defect thiospinels LixCu0.07[Ti2]S4 to be prepared with high purity and chemical homogeneity. X-ray and neutron powder-diffraction studies of LixCu0.07T[Ti2]S4 showed that lithium insertion into Cu0.07[Ti2]S4 is topotactic and that the inserted lithium occupies only the 16c-octahedral sites of the thiospinel framework at all lithium compositions. Static and MAS 7Li NMR spectra of LixCu0.07[Ti2]S4 exhibited a single lithium resonance with a small chemical shift relative to lithium acetate dihydrate at all lithium compositions; the chemical shift increased linearly with increasing lithium content.
Diamagnetic properties of molten cuprous halides and their mixtures
Shirakawa, Yoshiyuki,Tamaki, Sigeru,Okazaki, Hideo,Azuma, Masayoshi
, p. 544 - 551 (1993)
The magnetic susceptibilities of molten cuprous halides and their mixtures have been measured as a function of temperature. The temperature dependence of susceptibilities in molten CuBr and CuI show small paramagnetic deviations compared to those in molten potassium halides. The composition dependence of CuCl-CuI and CuBr-CuI melts obey the Wiedemann rule, while the molten CuCl-CuBr system exhibits a large deviation from this rule.
Efficient dye-sensitized solar cell based on a new porphyrin complex as an inorganic photosensitizer
Nasirian, Azam,Mirkhani, Valiollah,Moghadam, Majid,Tangestaninejad, Shahram,Mohammadpour Baltork, Iraj
, (2020/06/22)
Abstract: The synthesis of new porphyrin complexes that can absorb light in a broad range of the spectrum is very important for getting a high efficiency in dye-sensitized solar cells. The primary reason for using these complexes is good photophysical characteristic like good absorption and high quantum efficiency. Most of the metal porphyrin shows good photophysical characteristics with changing their ligands. In this work, the synthesis of a new Zn-porphyrin complex, that has a good spectral and electrochemical characteristic, is reported. Then, this complex is used as a dye in dye-sensitized solar cells, using titanium dioxide as a semiconductor. The application of this complex in a dye-sensitized nanocrystalline TiO2 solar cell has indicated a short circuit density of 11.60 mA, an open circuit potential of 0.65 V with an overall efficiency of 5.33%. The overall conversion efficiency of this system is due to the efficient electron injection into the conduction band during light absorption. Graphic abstract: In this work, the synthesis of a new Zn-porphyrin complex, together with its spectral and electrochemical properties, is described. The application of this complex in a dye-sensitized nanocrystalline TiO2 solar cell indicated a short circuit density of 11.60 mA, an open circuit potential of 0.65V with an overall efficiency of 5.33%.[Figure not available: see fulltext.]
