• Title/Summary/Keyword: quinoline

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Semiempirical Calculations of Hyperpolarizabilities for Quinoline Derivatives (Quinoline계 분자의 초분극률에 관한 반경험적 계산)

  • Ryu Ungsik;Choi Donghoon;Kim Nakjoong;Lee Yoon Sup
    • Journal of the Korean Chemical Society
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    • v.37 no.1
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    • pp.62-67
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    • 1993
  • The microscopic origin of nonlinear optical properties of quinoline derivatives have been investigated theoretically using MOPAC-AM1 method. In order to prepare promising nonlinear optical active polymers of polyquinoline derivatives, the optimized positions of strong electron donor and electron acceptor are determined in the heterocyclic ring for the energetically favorable structures. For each compound, the effect of the substituted positions on the microscopic nonlinear coefficients were investigated. Polyquinoline was already evaluated to have outstanding physical and mechanical properties so that its monomeric analogues were designed and synthesized for developing new second and third order nonlinear optical main chain polymers. Using the MOPAC-AM1 method, properties calculated include the intrinsic ground-state dipole moments, the polarizabilities, first and second hyperpolarizabilities under the condition of finite-field $(\omega$ = 0).

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Synthesis of Fullerene Oxide by Fullerene ($C_{70}$) and Various Amino N-Oxides under Ultrasonic Irradiation (초음파 조건에서 여러가지 아민 N-옥시드와 풀러렌($C_{70}$)를 이용한 풀러렌 산화물의 합성)

  • Ko, Weon-Bae;Han, Ji-Yeon;Lim, Young-A;Shin, Won-Jic;Yu, Gu-Yong
    • Elastomers and Composites
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    • v.39 no.2
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    • pp.153-160
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    • 2004
  • Fullerene oxides were synthesized by fullerene ($C_{70}$) and several amine N-oxides such as 3-picoline N-oxide, pyridine N-oxide hydrate, quinoline N-oxide, and isoquinoline N-oxide under ultrasonic condition at $25{\sim}43^{\circ}C$. The reactivity of fullerene ($C_{70}$) with various amine N-oxides undo, ultrasonic irradiation showed the same in all of the proceeding experiments; 3-picoline N-oxide : pyridine N-oxide hydrate : quinoline N-oxide : isoquinoline N-oxide. The MALDI-TOF MS, UV-vis spectrophotometer and HPLC analysis confirmed that the products of fullerene oxidation are [$C_{70}(O)n$] (n=1).

Synthesis and Antimicrobial Activity of 7-[3-Hydroxy-(4-methylthio or 4-methylthiomethyl)pyrrolidinyl]quinoline-3-carboxylic Acids (7-[3-히드록시-(4-메틸티오 또는 4-메틸티오메틸)피롤리디닐]퀴놀린-3-카르복실산의 합성과 항균작용)

  • Lee, Jae-Wook;Son, Ho-Jung;Lee, Kyu-Sam;Yu, Young-Hyo;Yoon, Geal-Jung
    • YAKHAK HOEJI
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    • v.38 no.6
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    • pp.677-682
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    • 1994
  • A number of 7-[3-hydroxy-(4-methylthio or 3-methylthiomethyl)pyrrolidinyl]quinoline-3-carboxylic acids were synthesized by condensation of 7-fluoro substituted quinoline-3-carboxylic acid with 3-hydroxy-4-methylthiopyrrolidine or 3-hydroxy-4-methylthiomethylpyrrolidine. The in vitro antimicrobial activity of them were tested against twenty species of Gram-positive or Gram-negative microorganisms. It showed remarkable antibacterial activity, particularly against Gram-positive microorganisms. Among those 1-cyclopropyl-5-amino-6,8-difluoro 7-(3-hydroxy-4-methylthiomethylpyrrolidinyl)-1,4-dihyd ro-4-oxo-3-quinolinecarboxylic acid(12d) and 1-cyclopropyl-6-fluoro-8-methoxy-7-(3-hydroxy-4-methylthiometby1pyrrolinyl)-1,4-dihydro-4-oxo-3-quinolinocarboxylic acid(12g) showed the most potent in vitro antibacterial activity, and 12d showed better antibacterial activity against MRSA compared to ciprofloxacin and sparfloxacin.

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Remediation of Contaminated Soil by Aqueous Solution Extraction (화학약액 추출법에 의한 오염된 흙의 정화 처리법 연구)

  • 박준범
    • Geotechnical Engineering
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    • v.11 no.4
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    • pp.87-98
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    • 1995
  • Laboratory tests were performed on modeling of in situ remediation of contaminated soils by aqueous solution extraction, thus investigating the feasibility of in situ treatments of soil to promote desorption of organic hazardous wastes. The investigation was conducted using phenol, aniline, quinoline, and 2-napthol adsorbed onto a UH40 soil, and various aqueous solutions were used to desorb, or otherwise remove, these organic contaminants. Decontaminants consisted of deionized water as a reference, hydrogen peroxide, acidy, bases, and surfactants. In situ conditions were modeled in the laboratory by permeating potential extracting liquids through reconstituted, contaminated soil specimens under controlled hydraulic gradients and stress condition through flexible wall permeameter tests. Sodium hydroxide desorbed phenol effectively. Aniline was effectively descorbed by nonionic surfactant. Anionic surfactant remediated quinoline and 2-napthol.

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A Quinoline carboxamide based Fluorescent Probe's Efficient Recognition of Aluminium Ion and its Application for Real Time Monitoring

  • Manivannan, Ramalingam;Ryu, Jiwon;Son, Young-A
    • Textile Coloration and Finishing
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    • v.32 no.4
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    • pp.185-192
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    • 2020
  • A novel binding site for metal ion made by designing molecule with tetrazolo quinoline with hydrazine carboxamide (TQC) and the designed molecule successfully synthesized. The probe works by selectively detecting Al3+ ion via both fluorimetric and colorimetric approach. The probe's effectiveness towards aluminium ion detection is highly sensitive and selective with no substantial interference with other competing ions. The added Al3+ ion to TQC fetched a rapid change of visual color to yellow from colorless, also the response of fluorescence turn-on. The fluorescence turn-on and color change visibly by the probe TQC with Al3+ ion credited to the ICT phenomenon (intramolecular charge-transfer transition). The likely interaction of the probe with aluminium ion has also been there predicted from ESI-MS spectral analysis results. The usefulness of the probe confirmed by practical utility by making a test kit to monitor Al3+ ion in water which showed a naked eye detection by notable color change.

Adsorption Characteristics and Parameters of Acid Black and Quinoline Yellow by Activated Carbon (활성탄에 의한 Acid Black과 Quinoline Yellow의 흡착특성 및 파라미터)

  • Yi, Kyung Ho;Hwang, Eun Jin;Baek, Woo Seung;Lee, Jong-Jib;Dong, Jong-In
    • Clean Technology
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    • v.26 no.3
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    • pp.186-195
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    • 2020
  • The isothermal adsorption, dynamic, and thermodynamic parameters of Acid black (AB) and Quinoline yellow (QY) adsorption by activated carbon were investigated using the initial concentration, contact time, temperature, and pH of the dyes as adsorption parameters. The adsorption equilibrium data fits the Freundlich isothermal adsorption model, and the calculated Freundlich separation factor values found that activated carbon can effectively remove AB and QY. Comparing the kinetic data showed that the pseudo second order model was within 10% error in the adsorption process. The intraparticle diffusion equation results were divided into two straight lines. Since the slope of the intraparticle diffusion line was smaller than the slope of the boundary layer diffusion line, it was confirmed that intraparticle diffusion was the rate-controlling step. The thermodynamic experiments indicated that the activation energies of AB and QY were 19.87 kJ mol-1 and 14.17 kJ mol-1, which corresponded with the physical adsorption process (5 ~ 40 kJ mol-1). The adsorption reaction was spontaneous because the free energy change in the adsorption of AB and QY by activated carbon was negative from 298 to 318 K. As the temperature increased, the free energy value decreased resulting in higher spontaneity. Adsorption of AB and QY by activated carbon showed the highest adsorption removal rate at pH 3 due to the effect of anions generated by dissociation. The adsorption mechanism was electrostatic attraction.

Synthesis of Novel Series of Various Substituted1-(5-(2-p-tolyloxyquinolin-3-yl)-2-(pyridin-4-yl)-1,3,4-oxadiazol-3(2H)-yl)ethanone and its Antibacterial Activity

  • Joshi, Ratnadeep S.;Mandhane, Priyanka G.;Chate, Asha V.;Gill, Charansingh H.
    • Journal of the Korean Chemical Society
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    • v.55 no.5
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    • pp.760-764
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    • 2011
  • A new series of 1-(5-(2-tolyloxyquinoline-3-yl)-2-(pyridine-4-yl)-1,3,4-oxidiazol-3(2H)-yl)ethanones were synthesized from cyclisation of N'-((2-(p-tolyloxy)quinoline-3-yl)methylene) isonitonohydrazide in acetic unhydride at reflux condition for 3-4 hr. The structures of the new compounds were confirmed by elemental analyses as well as IR, 1H NMR and mass spectral data. All the synthesized compounds were screened for their antibacterial activities against various bacterial strains. Several of these compounds showed potential antibacterial activity.