Results 211 to 220 of about 229,924 (266)

A Crystalline σ Complex of Copper

Journal of the American Chemical Society, 2011
Over the last decades, our understanding of σ-bond activation at transition metals has progressed considerably from both fundamental and synthetic points of view thanks to the preparation and characterization of a variety of σ complexes. Here we report the synthesis and structural analysis of the first σ complex involving a coinage metal. The copper(I)
Gualco, P., Amgoune, A., Miqueu, Karinne, Ladeira, S., Bourissou, D.   +4 more
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Copper complexes immobilized to chitosan

Journal of Inorganic Biochemistry, 1992
Polymeric ligands, such as 2-substituted pentanedioic acid (2), 2-substituted propanoic acid (3), and deoxylactit-1-yl (4) derivatives of chitosan (1), were used to prepare copper complexes that are widely soluble in aqueous solution. EPR results (100 K) show that all association complexes basically have a tetragonal symmetry.
CHIESSI, ESTER, PARADOSSI, GAIO, VENANZI, MARIANO, PISPISA, BASILIO   +3 more
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Nitritereduction by copper complexes

Dalton Trans., 2010
A series of copper complexes have been synthesised as potential agents for the catalytic reduction of nitrite anions. The ligands and corresponding copper complexes have been characterised by using a range of techniques including X-ray crystallography, NMR, microanalysis, mass spectrometry, infra-red spectroscopy, electrochemical studies and density ...
John G, Woollard-Shore, Jason P, Holland, Michael W, Jones, Jonathan R, Dilworth   +3 more
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The copper complex of alloxanic acid

Archives of Biochemistry and Biophysics, 1956
Abstract It seems unlikely that copper does complex with alloxan in view of the lability of alloxan with increase in pH and its transformation to alloxanic acid in alkaline solution. Hypsochromic and hyperchromic shifts in the spectrum of copper in the presence of alloxan and alloxanic acid are induced by increases in pH.
R A, RESNIK, H, CECIL
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Structure of a copper-isoniazid complex

Journal of Medicinal Chemistry, 1981
It is well-known that complex formation with copper ions increases the in vitro mycobactericidal action of the antituberculosis agent isoniazid. We report here the preparation and structure of a copper(II)-isoniazid complex. Unit cell parameters are a = 9.575, b = 14.855, and c = 7.056 A and space group P2(1)2(1)2(1).
J C, Hanson, N, Camerman, A, Camerman
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Copper and Copper Complexes in Tumor Therapy

ChemMedChem
AbstractCopper (Cu), a crucial trace element in physiological processes, has garnered significant interest for its involvement in cancer progression and potential therapeutic applications. The regulation of cellular copper levels is essential for maintaining copper homeostasis, as imbalances can lead to toxicity and cell death. The development of drugs
Yingqiao Wang, Tingxi Tang, Yi Yuan, Nan Li, Xiaoqing Wang, Jian Guan   +5 more
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Copper complexes as therapeutic agents

Metallomics, 2012
The importance of transition metals in biological processes has been well established. Copper (Cu) is a transition metal that can exist in oxidised and reduced states. This allows it to participate in redox and catalytic chemistry, making it a suitable cofactor for a diverse range of enzymes and molecules.
Clare, Duncan, Anthony R, White
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Identification of copper-copper and copper-hydrogen complexes in silicon

Semiconductors, 2013
The centers formed in silicon as a result of interaction between the substitutional copper impurity (Cus) and interstitial copper (Cui) or hydrogen (H) atoms, which are mobile at room temperature, are investigated in this study using the deep-level transient spectroscopy (DLTS) technique.
N. A. Yarykin, J. Weber
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Copper complexation of rosarin: formation of bis-copper rosarin and mono-copper linear tridipyrrin complexes

Dalton Transactions
Novel bis-copper rosarin and mono-copper linear tridipyrrin complexes were synthesized. The first HER study of 2Cu-1 indicated that the multi-metal polypyrrolic complexes are promising molecular hydrogen evolution reaction catalysts.
Xiaojuan Lv, Long Qian, Nikolay V. Tkachenko, Tao Zhang, Fengxian Qiu, Naoki Aratani, Takahisa Ikeue, Jianming Pan, Songlin Xue   +8 more
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Structure and Spectroscopy of Copper−Dioxygen Complexes

Chemical Reviews, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Liviu M, Mirica, Xavier, Ottenwaelder, T Daniel P, Stack   +2 more
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