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[en] An experimental investigation was made of the influence of the addition of molecular hydrogen on the characteristics of a copper iodide laser. An analysis was made of the weak, compared with a copper bromide vapour laser, influence of the addition of hydrogen on the copper iodide laser parameters. (lasers, active media)
[en] A novel and efficient annulation of pentane-2,4-dione with 2-(2-bromophenyl)quinazolin-4(3H)-one was disclosed in DMF catalyzed by CuI/L-proline in the presence of Cs2CO3. This procedure experienced the consecutive α-arylation of carbonyl, deacylation but no dehydration reaction for the synthesis of 6-hydroxy-6-methyl-5,6-dihydro-8H-isoquinolino[1,2-b]quinazolin-8-ones in good yields. Graphical abstract: .
[en] 2-(2-Bromophenyl)-4,5-diphenyl-1H-imidazole was used as an aryl halide to underwent α-arylation with 1,3-cyclohexanedione first, and then a nucleophilic addition and dehydration to give 2,3-diphenyl-6,7-dihydroimidazo[1,2-f]phenanthridin-8(5H)-one derivatives in good yields. This one-pot CuI-catalyzed procedure provided an efficient method for the synthesis of fused tetracyclic heterocycles containing both imidazole and phenanthridine moieties. Graphical abstract: .
[en] The Cu(I)-assisted aromatic halogen exchange proved useful for preparation of macroscopic amounts of 2-iodophenyl-metyrapone as well as for the n.c.a. radioiodinated analogue. Semi-preparative HPLC-isolation provided the compound with high purity for use as chromatograhic standard and for the determination of the inhibition constant of the 2-iodo-analogue. The non-isotopic exchange led to a high specific activity (>5000 GBq/μmol) of 2-[123I]iodophenyl-metyrapone. A reaction in acetic acid at elevated temperatures proved superior to an exchange in aqueous solution with in-situ reduction of Cu2+. Even without Cu+ high radiochemical yields of > 80% were obtained, while addition of Cu+ provided the radiotracer with 95% radiochemical yield within 5 minutes in acetic acid
[en] Microwave conductivity and two channels of recombination process were observed in the CuI films. Spin orbital splitting resulted in split in the valence band of CuI. The dye molecules attached to the CuI film act as an electron mediator in addition to the sensitization process under back wall-mode illumination. - Graphical abstract: Transient microwave-photoconductivity of CuI film
[en] A new double-tweezer type ligand L with four cyclohexanethiol moieties was employed in the assembly reactions with some d10 metal halides and its discrete type isostructural dimercury halides complexes and 1D copper iodide coordination polymer in crystalline state were isolated. A comparative NMR study suggested the similar mercury complex also exist in solution. The structural characteristics revealed here could be useful in the design of new dinuclear ligand system for the soft metal species. Research on the multi-dentate ligand system for binuclear compounds is in great demand due to the prospect that such species may serve as models of electron transfer, charge transfer and allosteric behaviors observed in biochemical system. The structural topologies of the binucleating frameworks are often determined by arguments of donor system and organic linkers. Our group and others have reported a series of dinuclear complexes of macrocyclic ligands with discrete and continuous forms. Parallel to this, noncyclic podal ligand system often give the dinuclear complexes
[en] Mr = 780.1446, cubic, Fd3m, a = 12.134(6) A, V = 1786(2) A3, Z = 8, Dm(293 K) = 5.7(1), Dx = 5.801(1) Mg m-3, Mo Kα, λ = 0.71069 A, μ = 35 mm-1, F(000) = 2568, T = 293 K, R = 0.041 for 132 independent reflections. The structure is characterized by an octahedral stacking of I atoms. Each I atoms is surrounded by three Bi atoms and eight Cu atoms. The sites of Bi atoms are half occupied. The sites of Cu atoms have an occupancy rate of 0.09 to 0.18. (orig.)
[en] Materials containing the anioinic species: CuX emit in the solid state. Their emission has been characterized by a change in wavelength of maximum emission with lowering of temperature. The change in color may be explained by a rearrangement between CuX2- and Cu2I4- forms each of which is responsible for one of the two wavelengths observed. Complexes of the type CuI2 crystallize in different space groups and with different crystallographic symmetry elements have been observed. The visible emission from these solid complexes may arise only from metal-halide interactions. The elimination of metal to metal, metal to ligand charge transfer, and anion-solvent interaction permits the examination of the influence of crystallographic symmetry as a factor in emission behavior. Ab initio calculations support the assignment of emission and excitation transitions. The examination of the visible emission characteristics a series of CuX2 complexes in which XI, Br and Cl, permits the evaluation of the influence of halide identity upon electronic transitions
[en] Using first principles, total energy method based on the full potential linear augmented plane wave method, we have performed theoretical studies of the relative stabilities of the substoichiometric CuI. A study of the electronic structure was undertaken, which revealed vacancy induced peaks in the DOS. The electron densities attached to these peaks have been analysed and are found to emanate from the unscreened Cu-Cu bonds through the iodine vacancy site