• Title/Summary/Keyword: precursors

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Synthesis of Some Novel Thiazolyl - Azetidinone Hybrids

  • Ahn, Chuljin;Hegde, Hemant;Shetty, Nitinkumar S.
    • Journal of the Korean Chemical Society
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    • v.60 no.2
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    • pp.107-110
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    • 2016

  • A new series of hydrazino thiazolyl-2-azetidinone 4(a-i) derivatives were synthesized efficiently using benzylidene hydrazinyl thiazole derivatives 3(a-i). The precursors, benzylidene hydrazinyl thiazoles were prepared by reacting 4-fluoro phenacyl bromide with thiosemicarbazones 2(a-i). All the structures of the synthesized compounds were ascertained by IR, NMR and mass spectral analysis.

  • https://doi.org/10.5012/jkcs.2016.60.2.107 인용 PDF KSCI KPUBS HTML

Growth and Characteristics of TiN Thin Films by Atomic Layer Epitaxy (Atomic Layer Epitaxy 법에 의한 TiN 박막의 성장과 그 특성)

  • 이종화;김동진
    • Proceedings of the IEEK Conference
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    • 1998.10a
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    • pp.581-584
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    • 1998

  • TiN thin films were grown on (100) Si substrate by atomic layer epitaxy at 130 - $240^{\circ}C$ using TEMAT and NH3 as precursors. Reactants were injected into the reactor in sequence of TEMAT precursor vapor pulse, N2 purging gas pulse, NH3 gas pulse and N2 purging gas pulse so that gas-phase reactions could be removed. The films were characterized by means of x-ray diffraction(XRD), 4-point probe, atomic force microscopy(AFM) and auger electron spectroscopy(AES).

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The Development of High Oxygen Pressures and the Stabilization of Unusual Oxidation States of Transition Metals

  • Gerard DEMAZEAU
    • Journal of the Korean Chemical Society
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    • v.42 no.1
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    • pp.135-140
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    • 1998

  • High oxygen pressures appear an important tool in Solid State Chemistry. Two main routes can be developed: (i) the stabilization of thermally unstable oxides, used as precursors, in order to open the synthesis of new materials, (ii) the stabilization of the highest oxidation states of transition metals. This paper is essentially devoted to this second research axis. The methodology developed for preparing new oxides containing Fe(Ⅴ), Ir(Ⅵ), high spin Fe(Ⅳ) and Cu(Ⅲ) is described.

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Systhesis New Precursors for Hexanitrohexa-azaisowurtzitane(HNIW) (새 전구체에 의한 고폭화약 Hexanitrohexa-azaisowurtzitane(HNIW) 합성 연구)

  • Cheun, Young Gu
    • Journal of the Korea Institute of Military Science and Technology
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    • v.5 no.3
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    • pp.56-61
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    • 2002

  • The hexanitrohexaazaisowurtzitane(HNIW) is a polycyclic caged nitramine oxidizer. For most existing weapons systems, the most critical ingredient in explosive and propellant applications is the oxidizer, HNIW, with its increase in performance output and energy capabilities for future in explosive and propellant systems. Two new polyacylhexaazaisowurtzitanes were synthesized. Pentaacetylhexaaza-isowurtzitane(PAIW) or pentaacetylformylhexaazaisowurtzitane(PAFIW) can be a precursor in the preparation of HNIW, recently developed highly energetic material.

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