• 대한화학회지
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• 제15권5호
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• pp.275-280
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• 1971

Six previously unreported N-acylated-DL-1-amino alkyl phosphonic acids were prepared; N-Acetyl-DL-1-amino-3-methyl butyl phosphonic acidN-Benzoyl-DL-1-amino-2-methyl propyl phosphonic acidN-Benzoyl-DL-1-amino-3-methyl butyl phosphonic acidN-Benzoyl-DL-1-amino-2-methyl butyl phosphonic acidN-Acetyl-DL-1-amino-2-methyl propyl phosphonic acidN-Acetyl-DL-1-amino-2-methyl butyl phosphonic acidThe first four compounds were characterized, and the last two compounds were obtained in the crude oil state. The above three DL-1-amino-alkyl phosphonic acid were synthesized from iso-valeric acid, iso-caproic acid and ${\beta}$-methyl valeric acid using Hell-Volhard-Zelinsky reaction, the condensation reaction with triethyl-phosphite and the modified Curtius Reaction. Iso-caproic acid and ${\beta$-methyl valeric acid were prepared by the conventional methods.

• 대한화학회지
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• 제15권1호
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• pp.15-22
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• 1971

DL-1-Amino-pentyl phosphonic acid, DL-1-Aminopropyl phosphonic acid were synthesized with good yield from caproic acid and butyric acid using the modified Curtius reaction and N-derivatives, N-acetyl-DL-1-amino propyl phosphonic acid, N-acetyl-DL-1-aminopentyl phosphonic acid, N-Benzoyl-DL-1-amino-propyl phosphonic acid, were also prepared by a variety of methods including the Schotten-Baumann reaction. In addition, the chemical and physical properties of the products were investigated. All the products were also identified by means of elemental analysis, Infrared spectrophotometry, Ninhydrin test, and the determination of the neuralization equivalent.

• Bulletin of the Korean Chemical Society
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• 제34권11호
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• pp.3495-3498
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• 2013

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.272-272
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• 2006

In recent years, water-free polymer electrolyte membranes are attracting serious attention due to the possibility of the fuel cell operation at intermediate temperatures ($100{\sim}200^{\circ}C$). It was reported that phosphonic acids have proton conductivity under anhydrous conditions and in particular, relatively high proton conductivity could be obtained from the composite materials with heterocycles such as imidazole, pyrazole, etc. In this work, styrene based polymers, poly((4-vinylbenzyloxy)alkylphosphonic acid), which have phophonic acid group at the end of alkyl chain was synthesized. These polymers were analyzed in terms of thermal stability and proton conductivity. Additionally, cyclic oligosiloxanes tethered with triazole were prepared and analyzed.

• 접착 및 계면
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• 제23권2호
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• pp.53-58
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• 2022

본 연구는 AlO_x유전체 표면에 유기 자립조립 단분자막 (self-assembled monolayer, SAM) 중간층을 도입함으로써 유전체의 표면특성을 제어하고, 최종적으로 유기전하변조트랜지스터 (Organic charge modulated field-effect transistor, OCMFET)의 전기적 특성을 향상시킨 결과를 제시하였다. 유기 중간층을 적용함으로써, OCMFET의 컨트롤 게이트(CG, Control gate)와 플로팅 게이트 (FG, Floating gate) 사이 커패시터 플레이트로 작용하는 산화알루미늄 게이트 유전체의 표면 에너지를 제어하였으며, FET의 가장 중요한 성능변수인 전계효과 이동도(field-effect transistor, μ_FET)를 향상시켰다. 사용된 SAMs은 네가지의 PA (Octadecylphosphonic acid, Butylphosphonic acid, (3-Bromopropyl)phosphonic acid, (3-Aminopropyl) phosphonic acid)를 사용하여 형성하였으며, 각각 0.73, 0.41, 0.34, 0.15 cm2V^-1s^-1의 μ_OCMFET를 나타내었다. 이 연구를 통해 유기 SAM 중간층의 알킬 체인(Alkyl chain)의 길이 및 말단기의 특성이 소자의 전기적 성능을 제어하는데 중요한 요인임을 확인하였으며, 이 결과를 통해 향후 최적의 센서 플랫폼으로서의 OCMFET 소자성능 최적화에 기여할 수 있을 것으로 기대한다.

• 공업화학
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• 제23권6호
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• pp.583-587
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• 2012

모노-디알킬 아미노 또는 디-디알킬 아미노 기능기를 분자 내에 갖는 6종의 새로운 아미노알킬 포스폰산 또는 아미노알킬 포스핀산 유도체들을 합성하고, 그들의 연기밀도를 측정하였다. 이 화합물들은 아민 및 알데히드에 아인산 또는 하이포 아인산을 첨가하여 한 단계로 반응시켜 인산에 한 개 또는 2개의 아미노기를 갖는 화합물로서 거의 정량적으로 90-98.6%의 수율을 얻었다. 이들의 연기밀도 시험은 ASTM E 662의 방법으로 측정하였으며, 시험결과 연기밀도 (Ds)값이 224.5~256.6으로 측정되었으며, 인산구조에 2개의 아미노기를 갖는 화합물이 1개의 아미노기를 갖는 화합물 보다 연기밀도가 감소되었다. 또한 아미노기에 연결된 알킬기의 탄소수와 연기밀도 사이에는 특별한 관련이 없었다.

• Bulletin of the Korean Chemical Society
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• 제24권5호
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• pp.593-599
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• 2003

The nanoparticle magnetite of which diameter was about 3 nm was synthesized in a homogeneous aqueous solution without a template. The synthesized magnetite nanoparticle was easily oxidized to maghemite in an ambient condition. The magnetic properties of the ferrite nanoparticle show superparamagnetism at room temperature and its blocking temperature is around 93 K. Modifying the sequential adsorption method of metal bisphosphonate, we have prepared a multilayer thin film of the ferrite nanoparticle on planar substrates such as glass, quartz and Si wafer. In this multilayer the ferrite nanoparticle layer and an alkylbisphosphonate layer are alternately placed on the substrates by simple immersion in the solutions of the ferrite nanoparticle and 1, 10-decanediylbis (phosphonic acid) (DBPA), alternately. This is the first example, as far as we know, of nanoparticle/alkyl-bisphosphonate multilayer which is an analogy of metal bisphosphonate multilayer. UV-visible absorption and infrared reflection-absorption studies show that the growth of each layer is very systematic and the film is considerably optically transparent to visible light of 400-700 nm. Atomic force microscopic images of the film show that the surface morphology of the film follows that of the substrate in μm-scale image and the nanoparticle-terminated surface is differentiated from the DBPA-terminated one in nm-scale image. The magnetic properties of this ferrite/DBPA thin film are almost the same as those of the ferrite nanoparticle powder only.