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Artykuły w czasopismach na temat „Copper-based complexes”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 20 lutego 2023

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1

Zhang, J., i D. P. Kamdem. "Electron Paramagnetic Resonance Spectroscopic (EPR) Study of Copper Amine Treated Southern Pine in Wood Preservation". Holzforschung 54, nr 4 (4.07.2000): 343–48. http://dx.doi.org/10.1515/hf.2000.060.

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Summary The structure of copper complexes in copper amine treated wood samples were elucidated by the application of electron paramagnetic resonance spectroscopy (EPR). EPR axial spectra were observed for all Cu-amine treated samples irrespective of the formulations. The values of A∥ and g∥ of the axial spectra indicate that the stereo-structure of copper complexes in copper amine treated wood was either tetragonal-based octahedral or square-based pyramidal. Comparison of electronic parameters of A∥ and g∥ in Cu-amine treated wood with those of the Cu-amine treating solution and the values in literature suggests that the interaction of wood with copper amine is through complexation in which wood functional groups are complexed with copper amine perpendicularly. The copper complexes in both treating solution and treated wood are in the form of CuN2O2, where copper is ligated with 2 nitrogen and 2 oxygen.

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2

Campo, José A, Mercedes Cano, José V Heras, M. Cristina Lagunas, Josefina Perles, Elena Pinilla i M. Rosario Torres. "Copper Complexes with New Pyridylpyrazole Based Ligands". Helvetica Chimica Acta 85, nr 4 (kwiecień 2002): 1079. http://dx.doi.org/10.1002/1522-2675(200204)85:4<1079::aid-hlca1079>3.0.co;2-g.

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3

Pousaneh, Elaheh, Marcus Korb, Volodymyr Dzhagan, Marcus Weber, Julian Noll, Michael Mehring, Dietrich R. T. Zahn, Stefan E. Schulz i Heinrich Lang. "β-Ketoiminato-based copper(ii) complexes as CVD precursors for copper and copper oxide layer formation". Dalton Transactions 47, nr 30 (2018): 10002–16. http://dx.doi.org/10.1039/c8dt01647j.

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4

Ilicheva, A. I., L. N. Bochkarev i V. A. Ilichev. "Electroluminescent copper-containing polymers based on copper(I) norbornene-substituted complexes". Russian Journal of General Chemistry 87, nr 6 (czerwiec 2017): 1184–91. http://dx.doi.org/10.1134/s1070363217060135.

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5

Wang, Yuanmin, Feng Teng, Zheng Xu, Lei Qian, Ting Zhang i Deang Liu. "Photo-functional materials based on copper(I) complexes*". Progress in Natural Science 14, nr 9 (1.09.2004): 746–52. http://dx.doi.org/10.1080/10020070412331344261.

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6

Kobayashi, Keiji, Yasuhiro Mazaki, Koichi Kikuchi, Kazuya Saito, Isao Ikemoto i Shojun Hino. "Novel copper complexes based on thiophene-fused DCNQI". Synthetic Metals 42, nr 1-2 (maj 1991): 1847–50. http://dx.doi.org/10.1016/0379-6779(91)91965-d.

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7

Mau, Alexandre, Guillaume Noirbent, Céline Dietlin, Bernadette Graff, Didier Gigmes, Frédéric Dumur i Jacques Lalevée. "Panchromatic Copper Complexes for Visible Light Photopolymerization". Photochem 1, nr 2 (4.08.2021): 167–89. http://dx.doi.org/10.3390/photochem1020010.

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In this work, eleven heteroleptic copper complexes were designed and studied as photoinitiators of polymerization in three-component photoinitiating systems in combination with an iodonium salt and an amine. Notably, ten of them exhibited panchromatic behavior and could be used for long wavelengths. Ferrocene-free copper complexes were capable of efficiently initiating both the radical and cationic polymerizations and exhibited similar performances to that of the benchmark G1 system. Formation of acrylate/epoxy IPNs was also successfully performed even upon irradiation at 455 nm or at 530 nm. Interestingly, all copper complexes containing the 1,1′-bis(diphenylphosphino)ferrocene ligand were not photoluminescent, evidencing that ferrocene could efficiently quench the photoluminescence properties of copper complexes. Besides, these ferrocene-based complexes were capable of efficiently initiating free radical polymerization processes. The ferrocene moiety introduced in the different copper complexes affected neither their panchromatic behaviors nor their abilities to initiate free radical polymerizations.

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8

Jesús Gismera, M., M. Antonia Mendiola, Jesús Rodriguez Procopio i M. Teresa Sevilla. "Copper potentiometric sensors based on copper complexes containing thiohydrazone and thiosemicarbazone ligands". Analytica Chimica Acta 385, nr 1-3 (kwiecień 1999): 143–49. http://dx.doi.org/10.1016/s0003-2670(98)00840-x.

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9

Sosoe, Johann, Corentin Cruché, Émilie Morin i Shawn K. Collins. "Evaluating heteroleptic copper(I)-based complexes bearing π-extended diimines in different photocatalytic processes". Canadian Journal of Chemistry 98, nr 9 (wrzesień 2020): 461–65. http://dx.doi.org/10.1139/cjc-2020-0014.

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A series of 12 new copper-based photocatalysts of the type Cu(N^N)(P^P)BF4 were synthesized bearing π-extended diimine ligands. The complexes have red shifted absorptions and larger extinction coefficients than complexes prepared with a parent diimine, dmp. The complexes were evaluated for their ability to promote three different photochemical transformations. Although the complexes were inactive in a reductive PCET process, the complexes afforded good yields in both SET and ET processes. Interestingly, homoleptic copper-complexes derived from the π-extended diimines were significantly more active in SET processes than analogous complexes with simpler diimines.

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10

Liu, Gang, Ning Xia, Linxu Tian, Zhifang Sun i Lin Liu. "Progress in the Development of Biosensors Based on Peptide–Copper Coordination Interaction". Biosensors 12, nr 10 (30.09.2022): 809. http://dx.doi.org/10.3390/bios12100809.

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Copper ions, as the active centers of natural enzymes, play an important role in many physiological processes. Copper ion-based catalysts which mimic the activity of enzymes have been widely used in the field of industrial catalysis and sensing devices. As an important class of small biological molecules, peptides have the advantages of easy synthesis, excellent biocompatibility, low toxicity, and good water solubility. The peptide–copper complexes exhibit the characteristics of low molecular weight, high tenability, and unique catalytic and photophysical properties. Biosensors with peptide–copper complexes as the signal probes have promising application prospects in environmental monitoring and biomedical analysis and diagnosis. In this review, we discussed the design and application of fluorescent, colorimetric and electrochemical biosensors based on the peptide–copper coordination interaction.

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11

Mitic, Zarko, Milorad Cakic, Goran Nikolic, Ljubomir Ilic i Mihajlo Stankovic. "Spectroscopic characterization of bioactive Cu(II) complexes with polysaccharides by modern FTIR microspectroscopy". Chemical Industry 64, nr 1 (2010): 9–20. http://dx.doi.org/10.2298/hemind1001009m.

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Investigations of bioactive copper complexes are of great interest for the pharmaceutical industry from the aspect of therapy of hypochromic microcitary anemia and hypocupremia. The structure of bioactive copper complexes with oligosaccharides has not yet been explained in details despite a number of studies. This work represents further development in the research of the complex structure and pharmacobiological activity of the copper complexes. Different copper complexes with dextran and pullulan oligosaccharides, as well as reduced derivatives, have been analyzed by IR spectroscopy. Characterization of the complexes has been performed by using modern spectroscopic techniques: RT-FTIR, LNT-FTIR, D2O-FTIR, ATR-FTIR and FTIR microspectroscopy. Results of FTIR microspectroscopic investigations show that the structural form of complexes and copper content depend considerably on constitution and ligands conformation, degree of crystallinity, polymerization, polydispersity, and linearity of macromolecules. Also, stability of the synthesized complexes, as well as their pharmacological effect, depend on these parameters. Based on IR testing results, structures of the synthesized Cu(II) complexes with polysaccharides were confirmed.

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12

Leban, I., i N. Lah. "Copper(II) halide complexes with simple pyridine based alcohols". Acta Crystallographica Section A Foundations of Crystallography 63, a1 (22.08.2007): s160. http://dx.doi.org/10.1107/s0108767307096419.

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13

Uraev, A. I., V. N. Ikorskii, M. P. Bubnov, K. A. Lysenko, V. G. Vlasenko, I. G. Borodkina, G. S. Borodkin, D. A. Garnovskii i A. D. Garnovskii. "Magnetoactive binuclear copper(II) complexes based on β-aminovinylimines". Russian Journal of Coordination Chemistry 32, nr 4 (kwiecień 2006): 287–96. http://dx.doi.org/10.1134/s1070328406040105.

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14

Molochnikov, L. S., A. V. Pestov, P. A. Slepukhin i Yu G. Yaltuk. "Copper(II) complexes based on N-(2-carboxyethyl)alkanolamines". Russian Journal of General Chemistry 79, nr 6 (czerwiec 2009): 1133–40. http://dx.doi.org/10.1134/s1070363209060176.

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15

Konnik, O. V., V. F. Shul’gin, E. A. Zamnius, A. N. Gusev i V. V. Minin. "Trinuclear copper(II) complexes based on iminodiacetic acid salicylidenehydrazone". Russian Journal of Inorganic Chemistry 60, nr 5 (maj 2015): 595–601. http://dx.doi.org/10.1134/s0036023615050125.

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16

Le Clainche, Loïc, Michel Giorgi i Olivia Reinaud. "Novel Biomimetic Calix[6]arene-Based Copper(II) Complexes". Inorganic Chemistry 39, nr 16 (sierpień 2000): 3436–37. http://dx.doi.org/10.1021/ic000072r.

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17

Wang, Fei, Ling-Zhi Liu, Lei Gao i Wen-Kui Dong. "Unusual constructions of two Salamo-based copper(II) complexes". Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 203 (październik 2018): 56–64. http://dx.doi.org/10.1016/j.saa.2018.05.088.

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18

Kobayashi, Keiji, Yasuhiro Mazaki, Koichi Kikuchi, Kazuya Saito, Isao Ikemoto i Shojun Hino. "Novel Conducting Copper Complexes Based on Thiophene-fused DCNQI". Chemistry Letters 20, nr 6 (czerwiec 1991): 1033–36. http://dx.doi.org/10.1246/cl.1991.1033.

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19

Belo, Dulce, Mauro J. Figueira, Joana Mendonça, Isabel C. Santos, Manuel Almeida, Rui T. Henriques, Maria Teresa Duarte, Concepció Rovira i Jaume Veciana. "Copper, Cobalt and Platinum Complexes with Dithiothiophene-Based Ligands". European Journal of Inorganic Chemistry 2005, nr 16 (sierpień 2005): 3337–45. http://dx.doi.org/10.1002/ejic.200500133.

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20

Mestivier, Mathieu, Jun Rong Li, Aurèle Camy, Camille Frangville, Christophe Mingotaud, Florence Benoît‐Marquié i Jean‐Daniel Marty. "Copper‐Based Hybrid Polyion Complexes for Fenton‐Like Reactions". Chemistry – A European Journal 26, nr 62 (30.09.2020): 14152–58. http://dx.doi.org/10.1002/chem.202002362.

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21

Grau, Jordi, Amparo Caubet, Olivier Roubeau, David Montpeyó, Julia Lorenzo i Patrick Gamez. "Time‐Dependent Cytotoxic Properties of Terpyridine‐Based Copper Complexes". ChemBioChem 21, nr 16 (29.04.2020): 2348–55. http://dx.doi.org/10.1002/cbic.202000154.

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22

Devi, Longjam R., Md Kausar Raza, Dulal Musib i Mithun Roy. "New Selenonapthaquinone-Based Copper (II) Complexes as the Next-Generation Photochemotherapeutic Agents". Anti-Cancer Agents in Medicinal Chemistry 21, nr 1 (29.12.2020): 33–41. http://dx.doi.org/10.2174/1871520620999200727204237.

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Background and Objective: Photoactive transition metal complexes like copper complexes find great interest in promoting metal-based photochemotherapeutic agents. In the present study, we explored the photocytotoxic efficacy of new selenylnaphthoquinone-based copper (II) complexes that provide a phenomenal platform in making an effective photo-chemotherapeutic agent via PDT in the clinical field of cancer therapy. Methods: Three new copper(II) complexes (1-3) were synthesized in 40-60% yield and characterized analytically/ spectroscopically. ATCC® Normal Adult Human Primary Epidermal Keratinocytes were grown in Dermal Cell Basal Media supplemented with Keratinocyte Growth Kit components, to propagate keratinocytes in serum- free (not animal free) conditions. Anticancer activity of the complexes was studied using MTT (3- [4,5- dimethyltiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) assay. The intracellular ROS (1O2) generation was studied by using Flow Cytometric Analysis (FACS) on HaCaT cells using cell accessible non-polar 2′,7′- Dichlorofluorescein Diacetate (DCFH-DA) dye. The Acridine Orange/Ethidium Bromide (AO/EB) dual staining assay was performed for detecting apoptosis in HaCaT cells. Several photophysical studies probing the generation of singlet oxygen was also carried out. We have performed Time-Dependent Density Functional Theory (TD-DFT) calculations using unrestricted B3LYP to understand the mechanism of type-II process. Results: All the complexes were remarkably cytotoxic in HaCaT cells with IC50, 1-4μM under visible light with comparing lower dark toxicity. The presence of low-lying and long-lived triplet excited state allowed effective intersystem crossing and subsequent generation of singlet oxygen, which was the primary cytotoxic species responsible for oxidative stress and apoptosis. The experimental findings are in good agrrement with the computational analysis (TD-DFT). Conclusion: The remarkably enhanced cytotoxicity of the new selenyl copper (II) complexes under the visible light probed the role of Se in photosensitized generation of singlet oxygen which was responsible for apoptosis in HaCaT cells. The results in the present work are of paramount importance in developing next generation copper(II)-based PDT agents.

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23

Iliş, Monica, i Viorel Cîrcu. "Discotic Liquid Crystals Based on Cu(I) Complexes with Benzoylthiourea Derivatives Containing a Perfluoroalkyl Chain". Journal of Chemistry 2018 (8.07.2018): 1–10. http://dx.doi.org/10.1155/2018/7943763.

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Mesomorphic three-coordinate copper(I) complexes ([Cu(BTU)2X], where X = Cl or Br) based on a new N-benzoylthiourea (BTU) ligand with two decyloxy and one perfluorooctyl groups at its periphery were designed and prepared. The BTU ligand coordinates via the S atom in a neutral monodentate fashion as confirmed by IR and NMR spectroscopy data. The liquid crystalline behavior of these copper(I) complexes was investigated by a combination of polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction analysis (XRD), while their thermal stability was studied by thermogravimetric analysis (TGA). These new copper(I) complexes have mesomorphic properties and exhibit a hexagonal columnar mesophase over a large temperature range, more than 100°C.

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24

Doniz Kettenmann, Sebastian, Yvonne Nossol, Febee R. Louka, Julia R. Legrande, Elise Marine, Roland C. Fischer, Franz A. Mautner, Vinja Hergl, Nora Kulak i Salah S. Massoud. "Copper(II) Complexes with Tetradentate Piperazine-Based Ligands: DNA Cleavage and Cytotoxicity". Inorganics 9, nr 2 (1.02.2021): 12. http://dx.doi.org/10.3390/inorganics9020012.

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Five-coordinate Cu(II) complexes, [Cu(Ln)X]ClO4/PF6, where Ln = piperazine ligands bearing two pyridyl arms and X = ClO4− for Ln = L1 (1-ClO4), L2 (2-ClO4), L3 (3-ClO4), and L6 (6-ClO4) as well as [Cu(Ln)Cl]PF6 for Ln = L1 (1-Cl), L4 (4-Cl), and L5 (5-Cl) have been synthesized and characterized by spectroscopic techniques. The molecular structures of the last two complexes were determined by X-ray crystallography. In aqueous acetonitrile solutions, molar conductivity measurements and UV-VIS spectrophotometric titrations of the complexes revealed the hydrolysis of the complexes to [Cu(Ln)(H2O)]2+ species. The biological activity of the Cu(II) complexes with respect to DNA cleavage and cytotoxicity was investigated. At micromolar concentration within 2 h and pH 7.4, DNA cleavage rate decreased in the order: 1-Cl ≈ 1-ClO4 > 3-ClO4 ≥ 2-ClO4 with cleavage enhancements of up to 23 million. Complexes 4-Cl, 5-Cl, and 6-ClO4 were inactive. In order to elucidate the cleavage mechanism, the cleavage of bis(4-nitrophenyl)phosphate (BNPP) and reactive oxygen species (ROS) quenching studies were conducted. The mechanistic pathway of DNA cleavage depends on the ligand’s skeleton: while an oxidative pathway was preferable for 1-Cl/1-ClO4, DNA cleavage by 2-ClO4 and 3-ClO4 predominantly proceeds via a hydrolytic mechanism. Complexes 1-ClO4, 3-ClO4, and 5-Cl were found to be cytotoxic against A2780 cells (IC50 30–40 µM). In fibroblasts, the IC50 value was much higher for 3-ClO4 with no toxic effect.

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25

Tripathi, Mamta, Ashish Kumar Asatkar, Stalin Antony, Mrinal Kanti Dash, Gourisankar Roymahapatra, Rama Pande, Avijit Sarkar i in. "Copper(ii) complexes supported by modified azo-based ligands: Nucleic acid binding and molecular docking studies". Open Chemistry 20, nr 1 (1.01.2022): 505–16. http://dx.doi.org/10.1515/chem-2022-0164.

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Abstract Two new copper(ii) complexes [CuL1] (1) and [CuL2] (2) derived from azo-based ligands 2-hydroxy-5-p-tolylazo-benzaldehyde (HL1) and 1-(2-hydroxy-5-p-tolylazo-phenyl)-ethan-one (HL2) were synthesized. These two ligands and their metal complexes were characterized by elemental analysis, nuclear magnetic resonance (1H and 13C), infrared, and UV/Vis spectroscopic techniques. Spectroscopy and other theoretical studies reveal the geometry of copper complexes, and their binding affinity towards nucleic acids are major groove binding.

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26

Tsymbal, Sergey, Ge Li, Nikol Agadzhanian, Yuhao Sun, Jiazhennan Zhang, Marina Dukhinova, Viacheslav Fedorov i Maxim Shevtsov. "Recent Advances in Copper-Based Organic Complexes and Nanoparticles for Tumor Theranostics". Molecules 27, nr 20 (19.10.2022): 7066. http://dx.doi.org/10.3390/molecules27207066.

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Treatment of drug-resistant forms of cancer requires consideration of their hallmark features, such as abnormal cell death mechanisms or mutations in drug-responding molecular pathways. Malignant cells differ from their normal counterparts in numerous aspects, including copper metabolism. Intracellular copper levels are elevated in various cancer types, and this phenomenon could be employed for the development of novel oncotherapeutic approaches. Copper maintains the cell oxidation levels, regulates the protein activity and metabolism, and is involved in inflammation. Various copper-based compounds, such as nanoparticles or metal-based organic complexes, show specific activity against cancer cells according to preclinical studies. Herein, we summarize the major principles of copper metabolism in cancer cells and its potential in cancer theranostics.

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27

Zhang, Yajing, Qian Wang, Zongsheng Yan, Donglai Ma i Yuguang Zheng. "Visible-light-mediated copper photocatalysis for organic syntheses". Beilstein Journal of Organic Chemistry 17 (12.10.2021): 2520–42. http://dx.doi.org/10.3762/bjoc.17.169.

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Photoredox catalysis has been applied to renewable energy and green chemistry for many years. Ruthenium and iridium, which can be used as photoredox catalysts, are expensive and scarce in nature. Thus, the further development of catalysts based on these transition metals is discouraged. Alternative photocatalysts based on copper complexes are widely investigated, because they are abundant and less expensive. This review discusses the scope and application of photoinduced copper-based catalysis along with recent progress in this field. The special features and mechanisms of copper photocatalysis and highlights of the applications of the copper complexes to photocatalysis are reported. Copper-photocatalyzed reactions, including alkene and alkyne functionalization, organic halide functionalization, and alkyl C–H functionalization that have been reported over the past 5 years, are included.

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28

Masuri, Sebastiano, Petr Vaňhara, Maria Grazia Cabiddu, Lukáš Moráň, Josef Havel, Enzo Cadoni i Tiziana Pivetta. "Copper(II) Phenanthroline-Based Complexes as Potential AntiCancer Drugs: A Walkthrough on the Mechanisms of Action". Molecules 27, nr 1 (22.12.2021): 49. http://dx.doi.org/10.3390/molecules27010049.

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Copper is an endogenous metal ion that has been studied to prepare a new antitumoral agent with less side-effects. Copper is involved as a cofactor in several enzymes, in ROS production, in the promotion of tumor progression, metastasis, and angiogenesis, and has been found at high levels in serum and tissues of several types of human cancers. Under these circumstances, two strategies are commonly followed in the development of novel anticancer Copper-based drugs: the sequestration of free Copper ions and the synthesis of Copper complexes that trigger cell death. The latter strategy has been followed in the last 40 years and many reviews have covered the anticancer properties of a broad spectrum of Copper complexes, showing that the activity of these compounds is often multi factored. In this work, we would like to focus on the anticancer properties of mixed Cu(II) complexes bearing substituted or unsubstituted 1,10-phenanthroline based ligands and different classes of inorganic and organic auxiliary ligands. For each metal complex, information regarding the tested cell lines and the mechanistic studies will be reported and discussed. The exerted action mechanisms were presented according to the auxiliary ligand/s, the metallic centers, and the increasing complexity of the compound structures.

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29

Wang, Zixing, Jun Zhu, Zhiwei Liu, Peng Wu, Hedan Wang, Zhen Zhang i Bin Wei. "Thermally activated delayed fluorescence of co-deposited copper(i) complexes: cost-effective emitters for highly efficient organic light-emitting diodes". Journal of Materials Chemistry C 5, nr 28 (2017): 6982–88. http://dx.doi.org/10.1039/c7tc01531c.

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TADF copper(i) complexes were made by co-depositing carboline derivatives and copper iodide. δ-Carboline derivative-based OLEDs showed 6 times higher efficiency than α-carboline derivative-based ones.

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30

Han, Wang, Zou i Shi. "Separation of Ag and Cu from Their Aqueous Thiosulfate Complexes by UV-C Irradiation". Metals 9, nr 11 (31.10.2019): 1178. http://dx.doi.org/10.3390/met9111178.

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In recent years, there has been renewed interest in the use of thiosulfate as a substitute for cyanide in silver leaching. Copper thiosulfate leaching without ammonia was applied to extract silver from silver sulfide, resulting in the production of Ag–Cu polymetallic thiosulfate complexes in solutions. It is necessary to separate Ag–Cu polymetallic thiosulfate complexes with the purposes of silver recovery and copper recycling. In this paper, the feasibility study on the use of UV-C irradiation to separate Ag–Cu polymetallic thiosulfate complexes was investigated based on the different photosensitivity of silver and copper. First, a kinetic study on the photolysis of silver and copper thiosulfate complexes by UV-C was investigated, indicating that the reactions follow first-order kinetics. The rate constant reactions were calculated, and it decreased with solution concentrations. On the other hand, the photoproducts of the silver and copper thiosulfate complexes were characterized by XRD and XPS in order to confirm the phase and chemical composition. It indicated that the silver photoproducts are Ag2S, S, Ag and the copper photoproducts are Cu2S, CuS, CuO, Cu, S. Finally, the four-step continuous separation of Ag–Cu polymetallic thiosulfate complexes by UV-C irradiation was investigated. The silver component was recovered with the accumulated recovery ratio of 97%, and the copper component was recycled with the accumulated recycle ratio of 51%, which made it possible for silver recovery and copper recycling.

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31

Thomas, Fabian, Dominik Steden, Alexander Eith, Alexander Hoffmann i Sonja Herres-Pawlis. "Chiral bis(pyrazolyl)methane copper(I) complexes and their application in nitrene transfer reactions". Zeitschrift für Naturforschung B 76, nr 10-12 (29.10.2021): 835–47. http://dx.doi.org/10.1515/znb-2021-0140.

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Abstract In this study, chiral bis(pyrazolyl)methane copper(I) acetonitrile complexes were applied to generate two novel terminal copper tosyl nitrene complexes with the nitrene generating agent SPhINTs in dichloromethane at low temperatures. The syntheses of the chiral bis(pyrazolyl)methane ligands are based on pulegone and camphor, members of the natural chiral pool. The chiral copper(I) acetonitrile complexes were applied as catalysts in the copper nitrene mediated aziridination reaction of different styrene derivatives and the C–H amination of various substrates. The reactions afforded good yields, but low enantiomeric excess under mild conditions. The nitrene species have been characterized with UV/Vis and EPR spectroscopy and the products of the decay by ESI mass spectrometry.

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32

Liu, Wen-Fang, Qi-Ming Qiu, Mo Zhang, Zhao-Min Su, Qingqing An, Hongjin Lv, Zhiyu Jia i Guo-Yu Yang. "Two new Cu-based borate catalysts with cubic supramolecular cages for efficient catalytic hydrogen evolution". Dalton Transactions 49, nr 29 (2020): 10156–61. http://dx.doi.org/10.1039/d0dt01994a.

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Two new copper-based borates with supramolecular cages were synthesized under hydrothermal condition. As new copper complexes, they exhibit photocatalytic activity. The experimental results show borates have potential applications as water reduction catalysts (WRCs).

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33

el Amrani, F. Ben-Allal, L. Perelló, J. Borrás i L. Torres. "Development of Novel DNA Cleavage Systems Based on Copper Complexes. Synthesis and Characterisation of Cu(II) Complexes of Hydroxyflavones". Metal-Based Drugs 7, nr 6 (1.01.2000): 365–70. http://dx.doi.org/10.1155/mbd.2000.365.

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Copper(II) complexes of several hydroxyflavones were prepared and characterised through their physico-chemical properties. The nuclease activity of three synthesised complexes is reported. These copper(II) complexes present more nuclease activity than the ligands and the copper(II) ion.

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Ferraro, Valentina, Jesús Castro, Lodovico Agostinis i Marco Bortoluzzi. "Luminescent heteroleptic copper(I) complexes with polydentate benzotriazolyl-based ligands". Transition Metal Chemistry 46, nr 5 (12.04.2021): 391–402. http://dx.doi.org/10.1007/s11243-021-00458-4.

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35

Rahardjo, Sentot Budi, Suwarsih i Husna Syaima. "SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF COPPER COMPLEXES BASED ON SULFONAMIDES". Rasayan Journal of Chemistry 13, nr 03 (2020): 1701–10. http://dx.doi.org/10.31788/rjc.2020.1335727.

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Achar, B. N., i P. K. Jayasree. "New "molecular metals" based on symmetrically tetrasubstituted copper phthalocyanine complexes". Canadian Journal of Chemistry 77, nr 10 (1999): 1690–96. http://dx.doi.org/10.1139/cjc-77-10-1690.

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Osip’yan, Yu A., R. B. Morgunov, A. A. Baskakov, V. I. Ovcharenko i S. V. Fokin. "Structural defects in molecular crystals based on heterospin copper complexes". Physics of the Solid State 45, nr 8 (sierpień 2003): 1465–70. http://dx.doi.org/10.1134/1.1602880.

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Kordestani, Nazanin, Hadi Amiri Rudbari, Alexandra R. Fernandes, Luís R. Raposo, Pedro V. Baptista, Daniela Ferreira, Giuseppe Bruno i in. "Antiproliferative Activities of Diimine-Based Mixed Ligand Copper(II) Complexes". ACS Combinatorial Science 22, nr 2 (8.01.2020): 89–99. http://dx.doi.org/10.1021/acscombsci.9b00202.

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Singh, Lok P., i Jitendra M. Bhatnagar. "Copper(II) selective electrochemical sensor based on Schiff Base complexes". Talanta 64, nr 2 (8.10.2004): 313–19. http://dx.doi.org/10.1016/j.talanta.2004.02.020.

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Pettinari*, Claudio, Fabio Marchetti, Carlo Santini, Riccardo Pettinari, Andrei Drozdov*, Sergei Troyanov, Giovanni A. Battiston i Rosalba Gerbasi. "Structure and volatility of copper complexes containing pyrazolyl-based ligands". Inorganica Chimica Acta 315, nr 1 (kwiecień 2001): 88–95. http://dx.doi.org/10.1016/s0020-1693(01)00330-9.

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Dai, Limei, Wansheng You, Lihua Chen, Liqiang Chen, Lihong Liu i Honghui Gai. "Organic–inorganic hybrids based on polyoxometalates and copper coordination complexes". Transition Metal Chemistry 41, nr 8 (23.09.2016): 909–15. http://dx.doi.org/10.1007/s11243-016-0094-8.

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Lim, Mi Hee, i Stephen J. Lippard. "Copper Complexes for Fluorescence-Based NO Detection in Aqueous Solution". Journal of the American Chemical Society 127, nr 35 (wrzesień 2005): 12170–71. http://dx.doi.org/10.1021/ja053150o.

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Buchen, Thomas, Alan Hazell, Lars Jessen, Christine J. McKenzie, Lars Preuss Nielsen, Jens Z. Pedersen i Dieter Schollmeyer. "Copper complexes of a p-phenylenediamine-based bis(tridentate) ligand". Journal of the Chemical Society, Dalton Transactions, nr 15 (1997): 2697–704. http://dx.doi.org/10.1039/a701588g.

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Kong, Shengwen, Ying Song, Lu Bai, Xinqiao Tang i Fanbao Meng. "Supramolecular complexes based on liquid-crystalline polysiloxanes and copper phthalocyanine". Polymer International 68, nr 3 (29.10.2018): 377–84. http://dx.doi.org/10.1002/pi.5720.

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Guk, D. A., O. O. Krasnovskaya, N. S. Dashkova, D. A. Skvortsov, M. P. Rubtsova, V. P. Dyadchenko, E. S. Yudina i in. "New ferrocene-based 2-thio-imidazol-4-ones and their copper complexes. Synthesis and cytotoxicity". Dalton Transactions 47, nr 48 (2018): 17357–66. http://dx.doi.org/10.1039/c8dt03164a.

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Krasnova, Larissa B., i Andrei K. Yudin. "Novel nitrogen containing chelating ligands from aziridines Preparation, coordination studies, and catalytic application in the cyclopropanation of styrene". Canadian Journal of Chemistry 83, nr 6-7 (1.06.2005): 1025–32. http://dx.doi.org/10.1139/v05-113.

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Novel ligands have been synthesized by the reaction of readily available aziridines with appropriate nitrogen based nucleophiles under mild conditions. Complexes of different stoichiometry can be readily obtained upon reaction between these ligands and the corresponding copper salts. The enantiomerically pure form of one of the ligands was obtained and applied in the styrene cyclopropanation reaction, where the copper catalyst revealed unexpectedly high diastereoselectivity in comparison with the known systems.Key words: ligands, aziridines, cyclopropanation, copper catalysts, metal complexes.

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47

Isaac, J. A., A. T. Mansour, R. David, A. Kochem, C. Philouze, S. Demeshko, F. Meyer i in. "Tetranuclear and dinuclear phenoxido bridged copper complexes based on unsymmetrical thiosemicarbazone ligands". Dalton Transactions 47, nr 29 (2018): 9665–76. http://dx.doi.org/10.1039/c8dt02452a.

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Sánchez-Lara, Eduardo, Amalia García-García, Enrique González-Vergara, Javier Cepeda i Antonio Rodríguez-Diéguez. "Magneto-structural correlations of cyclo-tetravanadates functionalized with mixed-ligand copper(ii) complexes". New Journal of Chemistry 45, nr 11 (2021): 5081–92. http://dx.doi.org/10.1039/d0nj06004f.

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Bimetallic materials based on tetravanadate anions and mixed ligand copper(ii) complexes were readily synthesized under non-hydrothermal conditions. The compounds show interesting structural and magnetic diversity mediated by copper symmetry.

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Samadov, A. S., I. G. Gorichev i E. A. Eliseeva. "Potentiometric Study of the Copper(II) Ions Complexation Process with Thiourea in Acidic Medium". Herald of the Bauman Moscow State Technical University. Series Natural Sciences, nr 2 (95) (kwiecień 2021): 134–41. http://dx.doi.org/10.18698/1812-3368-2021-2-134-141.

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Potentiometric titration method was used to study the copper(II) ions complexation process with thiourea in medium containing 1 mol/l of hydrochloric acid at a temperature of 298 K. It was found out that mononuclear (CuTMn) and binuclear (Cu2TMn) complexes were observed in the copper(II) --- thiourea system depending on the copper ions concentration. It was determined that in acid medium with copper(II) ions concentration less than 5 · 10--4 mol/l and mononuclear complexes of the composition are generated in the system, which constant is equal to lg β3 = 11.9. With an increase in the copper(II) ions concentration (CCu+2 > 5 · 10--4 mol/l), binuclear thiourea complex dominates in the system. Stability constant logarithm of the Cu2TM6 composition binuclear complex is equal to 27.5 and was calculated using the modified Leden's method. Based on the constants, complexes existence regions were determined depending on the ratio CTM/CCu+2. With the CTM/CCu+2 ≥ 5 relations, existence of a dominant complex significantly depends on the copper(II) ions concentration. It turned out that fractions of all complex particles were growing with an increase in the copper(II) ions concentration in the system. It was found that stability of thiourea complexes in the CuLi2+, AgLi+, AuLi+ rows was increasing

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Gonzalez-Silva, Karen, David Rendon-Nava, Alejandro Alvarez-Hernández i Daniel Mendoza-Espinosa. "Copper(ii) accelerated azide–alkyne cycloaddition reaction using mercaptopyridine-based triazole ligands". New Journal of Chemistry 43, nr 42 (2019): 16538–45. http://dx.doi.org/10.1039/c9nj03974k.

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