• Title/Summary/Keyword: Template synthesis

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Synthesis of Cobalt-Iron Prussian Blue Analogues Nanotubes by CTAB Soft-Template Method

  • Liu, Peng;Liang, Chuanghui;Xu, Jianfeng;Fang, Jian;Zhao, Jihua;Shen, Weiguo
    • Bulletin of the Korean Chemical Society
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    • v.31 no.5
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    • pp.1336-1338
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    • 2010

  • Three cobalt-iron Prussian Blue Analogues (PBAs) nanotubes contained with different alkali metal cations of K, Rb or Cs, respectively, were prepared by using cetyltrimethylammonium bromide (CTAB)/ethanol-water micelles as soft templates. The products were characterized by energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron micrograph (SEM), which confirmed the composition of the substances and their unique nanotube structures. Furthermore, the formation mechanism of the PBAs nanotubes was discussed and provided useful insight for further synthesis of nanotubes of other Prussian blue analogues.

  • https://doi.org/10.5012/bkcs.2010.31.5.1336 인용 PDF KSCI

Template Synthesis of New Nickel(Ⅱ) Comlexes of 14-Membered Pentaaza Macrocyclic Ligands: Effects of C-Alkyl and N-Hydroxyalkyl Pendant Arms on the Solution Behaviors of the Complexes

  • 강신걸;최장식;김성진
    • Bulletin of the Korean Chemical Society
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    • v.16 no.6
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    • pp.518-523
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    • 1995

  • New square planar nickel(Ⅱ) complexes with various 1-alkyl (4a-4c) and 1-hydroxyalkyl (4d-4f) derivatives of the 14-membered pentaaza macrocycle 8-ethyl-8-nitro-1,3,6,10,13-pentaazacyclotetradecane have been synthesized by two-step metal template condensation reactions of ethylenediamine, nitroethane, formaldehyde, and appropriate primary amines. The nitro group and/or hydroxyl group of 4a-4f are not directly involved in the coordination. The nickel(Ⅱ) complexes exist in coordinating solvents such as MeCN, Me2SO, and H2O as equilibrium mixtures of the square planar [Ni(L)]2+(L=4a-4f) and octahedral species [Ni(L)S2]2+(S=solvent molecule). Although the ligand field strength and redox potentials of the complexes are not affected by the nature of the substituents, the formation of octahedral species for 4d-4f in MeCN is strongly restricted by the hydroxyl group. Synthesis, characterization, and solution behaviors of the nickel(Ⅱ) complexes are described.

  • https://doi.org/10.5012/bkcs.1995.16.6.518 인용 PDF

Template Synthesis and Characterization of Binuclear Nickel(Ⅱ) and Copper(Ⅱ) Complexes of Double-ring Macrocyclic Ligands

  • Shin-Geol Kang;Soo-Kyung Jung;Jae Keun Kweon
    • Bulletin of the Korean Chemical Society
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    • v.12 no.2
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    • pp.219-224
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    • 1991

  • New binuclear Ni(Ⅱ) and Cu(Ⅱ) complexes with various alkyl derivatives of 1,2-bis(1,3,6,8,10,13-hexaaza-1-cyclotetradecyl) ethane, in which two fully saturated 14-membered hexaaza macrocyclic subunits are linked together by an ethylene chain, have been synthesized by the one step template condensations of formaldehyde with ethylenediamine and appropriate primary alkyl amines in the presence of the metal ions. Each macrocyclic subunit of the double-ring macrocyclic complexes contains one alkyl pendant arm and has a square planar geometry with a 5-6-5-6 chelate ring sequence. The visible spectra and oxidation properties indicate that the metal-metal interaction of the binuclear complexes are not significant. Synthesis, characterization, and the properties of the complexes are presented.

  • https://doi.org/10.5012/bkcs.1991.12.2.219 인용 PDF

Rapid Stitching Method of Digital X-ray Images Using Template-based Registration (템플릿 기반 정합 기법을 이용한 디지털 X-ray 영상의 고속 스티칭 기법)

  • Cho, Hyunji;Kye, Heewon;Lee, Jeongjin
    • Journal of Korea Multimedia Society
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    • v.18 no.6
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    • pp.701-709
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    • 2015

  • Image stitching method is a technique for obtaining an high-resolution image by combining two or more images. In X-ray image for clinical diagnosis, the size of the imaging region taken by one shot is limited due to the field-of-view of the equipment. Therefore, in order to obtain a high-resolution image including large regions such as a whole body, the synthesis of multiple X-ray images is required. In this paper, we propose a rapid stitching method of digital X-ray images using template-based registration. The proposed algorithm use principal component analysis(PCA) and k-nearest neighborhood(k-NN) to determine the location of input images before performing a template-based matching. After detecting the overlapping position using template-based matching, we synthesize input images by alpha blending. To improve the computational efficiency, reduced images are used for PCA and k-NN analysis. Experimental results showed that our method was more accurate comparing with the previous method with the improvement of the registration speed. Our stitching method could be usefully applied into the stitching of 2D or 3D multiple images.

  • https://doi.org/10.9717/kmms.2015.18.6.701 인용 PDF KSCI KPUBS HTML