• 제목/요약/키워드: 2-diamine

검색결과 358건 처리시간 0.03초

Spectrophotometric Determination of Copper(II) Using Diamine-Dioxime Derivative

  • Thipyapong, Khajadpai;Suksai, Chomchai
    • Bulletin of the Korean Chemical Society
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    • 제24권12호
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    • pp.1767-1770
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    • 2003
  • A simple, rapid and sensitive spectrophotometric method is herewith proposed for the determination of copper(II) by using diamine-dioxime ligand, meso-3,6,6,9-tetramethyl-4,8-diazaundecane-2,10-dione dioxime or meso-HexaMethyl Propylene Amine Oxime (meso-HMPAO). This method is based on the formation of a stable 1 : 1 red-pink complex between copper(II) and meso-HMPAO in aqueous solution. Absorption measurements were carried at 497 nm, with a molar absorptivity value of 338 L $mol^{-1}\;cm^{-1}$. Beer's law was obeyed over the concentration range of 0.5-370 ${\mu}$g $mL^{-1}$ with a Sandell's sensitivity value of 0.18 ${\mu}$g $cm^{-2}$. The proposed method has been successfully applied for determination of copper(II) in foodstuffs and pharmaceutical samples. The results obtained from this method are comparable with those obtained AAS.

Syntheses of Phosphonamides Containing Aminobenzylphosphonic Acid and Aminopenicillanic Acid

  • Hong, Suk-In;Kim, Chang-Sick;Kim, Yong-Joon
    • Bulletin of the Korean Chemical Society
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    • 제4권4호
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    • pp.171-175
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    • 1983
  • This paper reports new phosphonamide derivatives which contain diethyl aminomethylphosphonate, diethyl DL-1-aminobenzylphosphonate and 6-aminopenicillanic acid; N-(ethyl phthalimidomethylphosphonyl)-L-methionine methyl ester, N-(ethyl phthalimidomethylphosphonyl)-L-valine ethyl ester, N-[ethyl N-(methoxycarbonylmethyl)benzylphosphonamido]-2-phthalimidoacetamide, N-[ethyl N-(diethyl phosphonylbenzyl)methylphthalamido] phthalimide, N-[ethyl {ethyl N-(diethyl phosphonylbenzyl)aminomethylphosphonamido} phosphonylmethyl] phthalimide, N-[ethyl N-(diethyl phosphonylbenzyl)methylphosphonamido]-2-phthalimidoacetamide, N, N'-bis (ethyl phthalimidomethylphosphonyl)ethylene diamine, 6-(ethyl DL-1-aminobenzylphosphonamido) penicillanic acid, ethyl N-(ethoxycarbonylmethyl)-1-aminobenzylphosphonamide, ethyl N-(diethyl phosphonylbenzyl)aminomethylphosphonamide and N,N'-bis (ethyl aminomethylphosphonyl) ethylene diamine.

견의 정연조제로서 축합인산염의 효과에 관한 연구 (Effects of Condensed Sodium Phosphates as a Degumming Aid Reagent for Raw Silk Fabric)

  • 이용우;송기언;정인모
    • 한국잠사곤충학회지
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    • 제25권2호
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    • pp.44-50
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    • 1984
  • 견직물의 정연에 있어서 축합인산염 sodium pyrophosphate (S.T.P.) 및 sodium tripolyphosphate (S.T.P.)와 금속 이온봉쇄제 ethylene diamine tetraacetic acid-2Na (E.D.T.A.)의 정연조제로서의 효과를 검토하고자 지하수와 Na형 이온교환연수를 사용한 정연용수에 있어서 이들 정연조제의 첨가가 수질과 정연견의 품질에 어떻게 영향을 미치는가를 구명하기 위한 시험결과 다음과 같은 결과를 얻었다. 1. 정연용수에 축합인산염을 첨가하면 경도가 감소되었으며 경도제거효과는 온도증가와 함께 현저히 향상되었고 동일처리농도에서는 S.P.P. 가 S.T.P. 보다 약간경도제거 효과가 높았다. 2. 정연용수에 알카리제로서 탄산소오다를 사용하면 경도가 증가되었으나 규산소오다를 첨가하면 경도가 감소되었다. 3. 정연종료시 정연액의 pH가는 S.P.P. 첨가구가 9.90, E.D.T.A.-2Na 첨가구는 9.95로서 대조인 미첨가구 9.80에 비하여 약간씩 높았다. 4. 축합인산염에 비하여 E.D.T.A-2Na가 용수중의 Fe$^{3+}$ 이온봉쇄작용에 효과적이었으며 축합인산염 중에서는 S.T.P.가 S.P.P.에 비하여 우수하였다. 5. 견포 연감률은 Na형이온교환연수 정연이 지하수정연에 비하여 높았고 견포의 굴곡강도(mgㆍcm)는 30.6으로서 지하수 정연구의 37.1 보다 감소되었다. 6. 지하수 정연에 있어서 E.D.T.A.-2Na첨가구가 축합인산염 첨가구에 비하여 연감률이 높고 강연도가 감소되며 압축탄성률이 향상되었다. 7. Na형 이온교환연수 정연에있어서 축합인산염과 E.D.T.A-2Na를 첨가하면 연감률향상 및 굴곡강도 감소의 효과가 있었지만 양 처리간의 유의차는 인정되지 않았다.

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글루타르알데하이드 고정 돼지 심낭에서 L-lysine를 이용한 Diamine Bridge 효과 (Effect of Diamine Bridges Using L-lysine in Glutaraldehyde Treated Porcine Pericardium)

  • 김관창;최윤경;김수환;김용진
    • Journal of Chest Surgery
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    • 제42권2호
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    • pp.157-164
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    • 2009
  • 배경: 폐동맥 판막 협착 혹은 형성 부전을 동반한 여러 선천성 심장기형의 수술적 치료를 위하여, 다양한 종류의 우심실-폐동맥간 도관이 사용되었다. 장기 성적이 우수한 냉동동종 이식편(cryopreserved homograft)의 공급의 제한으로 이를 대체할 이종 조직 이식편의 석회화 방지를 위한 효과적인 기법의 확립이 필요하다. 본 연구에서는 L-lysine을 이용한 diamine bridge의 항석회화 효과를 Ethanol과 비교하여 알아보고자 하였다. 대상 및 방법: 0.625% glutaraldehyde ($4^{\circ}C$에서 2일, 상온에서 7일간) 고정한 돼지 심낭을 80% Ethanol (상온에서 1일), 혹은 0.1M L-lysine ($37^{\circ}C$에서 2일)로 처리 한 후 각각의 두께(thickness)와 장력(tensile strength)을 측정하였다. 각각의 항석회화 처리한 돼지 심낭을 생후 3주된 쥐의 피하조직에 이식하고 8주 뒤 칼슘을 정량하고 조직학적 소견을 관찰하였다. 결과: 0.625% glutaraldehyde 고정만 시행한 군$(51.2{\pm}8.5ug/mg)$과 비교하여 0.625% glutaraldehyde 고정 후에 80% Ethanol 처리한 군($13.6{\pm}10.0ug/mg$, p=0.008)과, 0.625% glutaraldehyde 고정 후에 L-lysine 처리한 군($15.3{\pm}1.0ug/mg$, p=0.002), 그리고 0.625% glutaraldehyde 고정 후에 80% Ethanol과 L-lysine 처리한 군($16.1{\pm}11.1ug/mg$, p=0.012)은 통계적으로 의미 있게 칼슘의 침착량이 적었다. 0.625% glutaraldehyde 고정 후에 80% Ethanol 처리한 군의 두께와 장력은 각각 $0.18{\pm}0.02mm,\;1.20{\pm}0.30kg$중/5mm로 0.625% glutaraldehyde 고정 후에 L-lysine 처리한 군의 $0.13{\pm}0.03mm$, $0.85{\pm}0.36$ 1.0kg 중/5mm 보다 증가되어 있었다(p<0.01, p=0.035). 결론: L-lysine을 이용한 diamine bridge는 Ethanol과 비교하여 비슷한 항석회화 효과를 보여 주었으며 Cross-link를 증가시켜 이종 이식편의 두께와 장력을 증가시켜 주는 효과가 있었다.

Biphenyl-2,2'-diyl 구조를 함유하는 Copolyterephthalamides의 합성과 성질 (Synthesis and Properties of Copolyterephthalamides Containing Biphenyl-2,2'-diyl Structure)

  • 정화진
    • 한국산학기술학회논문지
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    • 제11권6호
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    • pp.2311-2316
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    • 2010
  • 디아민으로서 p-phenylene diamine, 4,4'-oxydianiline, 1,4-bis(4-aminophenoxy)benzene에 대해 이염기산으로서 terephthalic acid와 2,2'-bibenzoic acid를 혼합 사용하여, 주쇄에 Biphenyl-2,2'-diyl 구조를 갖는 copolyterephthalamide를 직접중축합법에 의해 합성하였다. 얻어진 공중합체는 $0.46{\sim}0.93dL/g$의 본성점도를 나타내었으며, 이들 대부분은 N,N-dimethylacetamide와 N-methyl-2-pyrrolidone과 같은 범용 유기용매에 용해하였고, 유리전이온도는 $239^{\circ}C$$326^{\circ}C$ 사이의 값을 나타냈으며, 질소기류하 10% 열분해 온도는 $410{\sim}485^{\circ}C$였다.

Synthesis and Characterization of Palladium and Platinum Complexes of N,N'-Bis[2'-(diphenylphosphino)phenyl]propane-1,3-diamine. Single-Crystal Structures of $[Pd(Ph_2PC_6H_4NC_3H_6NC_6H_4PPh_2)]$ and $[Pt(Ph_2PC_6H_4NH)(SEt_2)Cl]$

  • 유동원;김은진;강상옥;고재정;이승희
    • Bulletin of the Korean Chemical Society
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    • 제19권5호
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    • pp.565-568
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    • 1998
  • Novel mononuclear metal complexes with the formula $[M(Ph_2PC_6H_4NC_3H_6NC_6H_4PPh_2)]$ (M=Pd (1); M=Pt (2)) were obtained when N,N'-bis[2'-(diphenylphosphino)phenyl]propane-1,3-diamine, I was mixed with cisdichlorobis(diethylsulfide)palladium and platinum in the presence of NEt3. Two mononuclear metal compounds with the fomula [M(Ph2PC6H4NH)(SEt2)Cl] (M=Pd (3); M=Pt (4)) were synthesized from $M(SEt_2)2Cl_2$ and N-(2'-diphenylphosphinophenyl)-4-amino-1,1,1,5,5, 5-hexafluoro-3-penten-2-one, II by the elimination reaction of hexafluoro pentenone. The X-ray single crystal structures of 1 and 4 are described. X-ray single crystal diffraction analyses reveal that compound 1 is a mononuclear palladium compound with P,N,N,P-coordination mode and 4 is a mononuclear platinum compound with P,N-coordination mode.

Spectroscopic characterization of N,N'-bis(salicylidene)pentane-1,3-diamine nickel(II) complex

  • Kim, Gilhoon;Won, Hoshik
    • 한국자기공명학회논문지
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    • 제18권2호
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    • pp.74-81
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    • 2014
  • The $N_2O_2$ tetradentate Schiff base ligand, N,N'-bis(salicylidene)pentane-1,3-diamine (Salpn), coupled with 1:2 concentration ratio of 1,3-diaminopentane and salicylaldehyde was used to produce a series of macrocyclic Nikel(II) complexes. In the metal complexation, it was observed that Salpn macrocyclic ligand can adopt more than a metal ion giving an unique multinuclear metal complexes including Ni(II)Salpn and $Ni(II)_3(Salpn)_2$. Characteristic IR ${\upsilon}(M-O)$ peaks for Ni(II)Salpn and $Ni(II)_3(Salpn)_2$ were observed to be $1028cm^{-1}$ and $1024cm^{-1}$, respectively. Characteristic UV-Vis absorption ${\lambda}_{max}$ peaks for $Ni(II)_3(Salpn)_2$ were observed to be 241nm and 401 nm. Structural characterization of $Ni(II)_3(Salpn)_2$ by NMR exhibits that the salicylidene ring moiety has two different resonance signals originated from the magnetically asymmetric diligand and trinuclear bis complex. Complete NMR signal assignments and characterizations elucidating structural features of $Ni(II)_3(Salpn)_2$ were described in detail.

중금속 이온 분리를 위한 새로운 네 자리 N2O2계 리간드의 합성 및 착 화합물의 안정도상수 결정 (Synthesis of New N2O2 Tetradentate Ligands and Determination of Stability Constants of Metal Complexes for Removal of Heavy Metals)

  • 김선덕;김준광;이경호
    • 한국환경과학회지
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    • 제16권8호
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    • pp.913-920
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    • 2007
  • Hydrochloride acid salts of new $N_2O_2$ tetradentate ligands containing amine and phenol N,N'-bis(2-hydroxybenzyl)-o-phenylenediamine(H-BHP), N,N'-bis(5-bromo-2-hydroxybenzyl)-o-phenylenediamine(Br-BHP), N,N'-bis(5-chloro-2-hydroxybenzyl)-o-phenylene-diamine(Cl-BHP), N,N'-bis(5-methyl-2-hydroxybenzyl)-o-phenylene-diamine (Me-BHP) and N,N'-bis(5-methoxy-2-hydroxybenzyl)-o-phenylenediamine(MeO-BHP) were synthesized. The ligands were characterized by elemental analysis, mass and NMR spectroscopy. The elemental analysis showed that the ligands were isolated as dihydrochloride salt. The potentiometry study revealed that the proton dissociation constants$(logK_n{^H})$ of ligands and stability constants $(logK_{ML})$ of transition and heavy metals complexes. The order of the stability constants of each metal ions for ligands was Br-BHP < Cl-BHP > H-BHP < MeO-BHP < Me-BHP.

1,2-Bis(4-trimellitimidophenoxy)benzene으로 부터 유도된 신규 방향족 폴리아미드이미드 (Noble Aromatic Poly(amide-imide)s Derived from 1,2-Bis(4-trimellitimidophenoxy)benzene)

  • 정화진
    • 한국응용과학기술학회지
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    • 제27권2호
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    • pp.129-136
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    • 2010
  • A series of noble poly(amide-imide)s and copoly(amide-imide)s bearing 1,2-bis(4-phenoxy)benzene units were synthesized by the direct polycondensation of 1,2-bis(4-trimellitimidophenoxy)benzene[1,2-PTPB] with a combination of commercially available aromatic diamines and diacids such as m-phenylene diamine, p-phenylene diamine(PPD), isophthalic acid and terephthalic acid(TA) in N-methyl-2-pyrrolidone(NMP) using triphenyl phosphite and pyridine as a condensing agent in the presence of dehydrating agent ($CaCl_2$). The resulting polymers had inherent viscosities in the range of 0.37~0.78 dL/g and most of them were soluble m common organic solvents including NMP, dimethylacetamide, dimethylsulfoxide, dimethylformamide, and m-cresol. Wide-angle X-ray diffractograms revealed that the copoly(amide-imide) derived from PPD with mixed acids of 1,2-BTPB and TA, showed crystalline nature, whereas all of the other polymers were found to be amorphous. The glass transition temperatures of the polymers occurred over the temperature range of $270{\sim}323^{\circ}C$ in their differential scanning calorimetry curves and their 10% weight loss temperature, determined by thermogravimetric analysis in air and nitrogen atmosphere, were in the range $465{\sim}535^{\circ}C$, $500{\sim}550^{\circ}C$, respectively, indicating their good thermal stability.