• 제목/요약/키워드: Coordination chemistry

검색결과 364건 처리시간 0.028초

Synthesis, crystal structure, and analytical characterizations of amphiphilic palladium(II) compound containing bis(benzylthio)methylenepropanedioate

  • Tae Hwan Noh
    • Analytical Science and Technology
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    • 제36권4호
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    • pp.198-203
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    • 2023
  • The reaction of cis-protected (Me4en)Pd(II) species with potentially multidentate bis(benzylthio)methylenepropanedioate (L) was carried out to obtain a monometallic compound, [(Me4en)Pd(L)], in O,O'-coordination mode. The bis(benzylthio)methylene group was bent strikingly from the palladium square plane at the dihedral angle of 70.40°. The physicochemical properties of the present palladium(II) compound were fully characterized by means of infrared and nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction measurement.

Two-dimensional Cu Coordination Polymer: [$Cu_2Cl_2$(4,4'-dipyen)] (2차원 구리 배위 고분자: [$Cu_2Cl_2$(4,4'-dipyen)])

  • Huh, Hyun-Sue;Lee, Soon-W.
    • Korean Journal of Crystallography
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    • 제18권1_2호
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    • pp.16-20
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    • 2007
  • Under hydrothermal conditions, a 2-dimensional copper(I) coordination polymer [$Cu_2Cl_2$(4,4'-dipyen)] (1) was prepared from [$Cu(OAc)_2]{\cdot}H_2O$, 4,4'-dipyen, and KCl. In polymer 1, copper atoms are linked by the 4,4'-dipyen ligands approximately along the b-axis and are also linked by the chloro ligands approximately along the a-axis to form a 2-D layer, a network of rectangles.

Synergistic extraction of lanthanoids(III) with thenoyltrifluoroacetone and aromatic carboxylic acids and the hydration of the extracted species

  • Ishiwata, E.;Kimura, T.;Kato, Y.;Hasegawa, Y.
    • Analytical Science and Technology
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    • 제8권4호
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    • pp.499-503
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    • 1995
  • In order to study how and why the stabilities of lanthanoid(III) complexes in solutions vary across the series, the formation constants of the adducts of tris(2-thenoyltrifluoroacetonato)lanthanoids(III) with seven carboxylic acids in chloroform have been determined by solvent extraction technique at 298K. The formation constants with carboxylic acids generally decrease with increasing the atomic number, but in the middle of the series, they change only slightly. Such trends have been interpreted as related to a change of the coordination number in the middle of the series. It has been attempted to determine the number of water molecules coordinated to the adducts as well as $Eu(TTA)_3$ in chloroform by measuring the fluorescence life time of europium(III), to ensure the assignment of the coordination number.

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Inorganic polymers of metal (Ⅱ) ions with Schiff's Base of quinizarin-ethylenediamine (Quinizarin-ethylenediamine의 Schiff's Base 와 금속 (Ⅱ) 이온이 만드는 Coordination polymer의 합성에 관하여)

  • Joon Suk Oh;Won Suk Kwak
    • Journal of the Korean Chemical Society
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    • 제13권1호
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    • pp.29-36
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    • 1969
  • lnorganic polymers, which are composed of metal (Ⅱ) ions and Schiff's Base of quinizarin-ethylenediamine, have been prepared. In order to find out proper conditions for the reaction, some investigations have been carried out to test the effect of pH, kind of solvent and the state of reagent. As a result, the highest yield occurred near pH 7 and it was found that there were not great difference in the kind of solvent and the state of reagent we had used. Most of the polymers are seemed not to be those we have attempted to prepare. They are found to be coordination polymers which have rather low molecular weight.

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The Coordination of Pyridyl-N to Pentacyanoferrate for the Electrochemical Detecting Small Organic Molecules

  • Choi, Young-Bong;Jeon, Won-Yong;Kim, Hyug-Han
    • Bulletin of the Korean Chemical Society
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    • 제34권2호
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    • pp.595-599
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    • 2013
  • The coordination of pyridyl-N to pentacyanoferrate for the detection of small organic antigens in solution is presented. The unique contribution of this paper is the direct conjugation of pyridyl-N in small organic antigens to pentacyanoferrate. Pentacyanoferrate is promising as an electrochemical label owing to its good electro-chemical properties, which can be utilized to generate an electrical signal in homogeneous electrochemical immunoassays. The facilely synthesized pyridyl-N to pentacyanoferrate was characterized by the electrochemical and spectroscopic methods. Hippuric acid (HA) has been detected competitively on the interaction of free HA and pentacyanoferrate-(4-aminomethylpyridine-hippuric acid) (Fe-HA) to its antibody, with the detection limit of 0.50 ${\mu}g\;mL^{-1}$. While pentacyanoferrate-based immunoassay is in its simplicity and infancy, the proposed immunoassay offers attractive opportunities for developing pyridyl-N-based the electrochemical detection of small organic antigens in the health care area.

Synthesis and Antifungal Activity of Dithiocarbamoic Acid Derivatives

  • Kim, Ha-Yeon;Lee, Jong-Dae
    • Journal of Integrative Natural Science
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    • 제2권3호
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    • pp.198-201
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    • 2009
  • Dithiocarbamoic acid and their derivatives were found to readily react with potassium and sodium hydroxide to give the corresponding alkali metal dithiocarbamoic acid derivatives 8-17 in moderate to good yields.

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