• Title/Summary/Keyword: Copper coordination polymer

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A Two-dimensional Grid of Copper (I) Coordination Polymer: Preparation and Structure of Bromo(pyrazine)copper(I), [CuBr(pyz)] (2차원 격자 형태의 구리 배위 고분자: Bromo(pyrazine)copper(I), [CuBr(pyz)]의 합성 및 구조)

  • Baeg, Jee-Young;Kim, Han-Na;Lee, Yeon-Kyoung
    • Korean Journal of Crystallography
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    • v.15 no.1
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    • pp.5-8
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    • 2004

  • The hydrothermal reaction of copper(I) bromide (CuBr) and pyrazine ($C_4H_4N_2$, pyz) gave a 2-D corrdination polymer [CuBr(pyz)] (1). X-ray structure determination revealed that polymer 1 has a 2-D network based on rectangular grids, each of which has the dimensions of 4.0${\times}$5.7 ${\AA}$. Polymer 1 has channels along the b-axis.

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Zeta-potentials of Oxygen and Nitrogen Enriched Activated Carbons for Removal of Copper Ion

  • Park, Kwan-Ho;Lee, Chang-Ho;Ryu, Seung-Kon;Yang, Xiaoping
    • Carbon letters
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    • v.8 no.4
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    • pp.321-325
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    • 2007

  • The oxygen and nitrogen enriched activated carbons were obtained from modification of commercial activated carbon by using nitric acid, sodium hydroxide and urea. Zeta-potentials of modified activated carbons were investigated in relation to copper ion adsorption. The structural properties of modified activated carbons were not so much changed, but the zeta-potentials and isoelectric points were considerably changed. The zeta-potential of nitric acid modified activated carbon was the most negative than other activated carbons in the entire pH region, and the $pH_{IEP}$ was shifted from pH 4.8 to 2.6, resulted in the largest copper ion adsorption capacities compare with other activated carbons in the range of pH 3~6.5. In case of urea modified activated carbon, copper ion adsorption was larger than that of the as-received activated carbon from pH 2 to pH 6.5 even though the $pH_{IEP}$ was shifted to pH 6.0, it was due to the coordination process operated between nitrogen functional groups and copper ion. The adsorption capacity of copper ion was much influenced by zeta-potential and $pH_{IEP}$ of carbon adsorbent.

  • https://doi.org/10.5714/CL.2007.8.4.321 인용 PDF

One-Pot Reaction Involving Two Different Amines and Formaldehyde Leading to the Formation of Poly(Macrocyclic) Cu(II) Complexes

  • Lee, Yun-Taek;Kang, Shin-Geol
    • Bulletin of the Korean Chemical Society
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    • v.33 no.8
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    • pp.2517-2522
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    • 2012

  • New polynuclear poly(hexaaza macrocyclic) copper(II) complexes $[1](ClO_4)_{2n}{\cdot}(H_2O)_{2n}$, $[2](ClO_4)_{2n}{\cdot}(H_2O)_{2n}$, and $[3](ClO_4)_{2n}{\cdot}(H_2O)_{2n}$ have been prepared by the one-pot reaction of formaldehyde with ethylenediamine and 1,2-bis(2-aminoethoxy)ethane, 1,3-diaminopropane, or 1,6-diaminohexane in the presence of the metal ion. The polymer complexes contain fully saturated 14-membered hexaaza macrocyclic units (1,3,6,8,10,13-hexaazacyclotetradecane) that are linked by $N-(CH_2)_2-O-(CH_2)_2-O-(CH_2)_2-N$, $N-(CH_2)_3-N$, or $N-(CH_2)_6-N$ chains. The mononuclear complex $[Cu(H_2L^5)](ClO_4)_4$ ($H_2L^5$ = a protonated form of $L^5$) bearing two $N-(CH_2)_2-O-(CH_2)_2-O-(CH_2)_2-NH_2$ pendant arms has also been prepared by the metal-directed reaction of ethylenediamine, 1,2-bis(2-aminoethoxy)ethane, and formaldehyde. The polymer complexes were characterized employing elemental analyses, FT-IR and electronic absorption spectra, molar conductance, X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and scanning electron micrograph (SEM). Electronic absorption spectra of the complexes show that each macrocyclic unit of them has square-planar coordination geometry with a 5-6-5-6 chelate ring sequence. The polymer complexes as well as $[Cu(H_2L^5)]^{4+}$ are quite stable even in concentrated $HClO_4$ solutions. Synthesis and characterization of the polynuclear and mononuclear copper(II) complexes are reported.

  • https://doi.org/10.5012/bkcs.2012.33.8.2517 인용 PDF KSCI