• Title/Summary/Keyword: 페난트렌

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A DFT Study for the Reaction Pathway(s) of Polycyclic Aromatic Hydrocarbons I: Phenanthrene Degradation with two OH Radicals (다고리 방향족 탄화수소의 반응 경로에 대한 DFT 연구 I: 2개의 OH 라디칼에 의한 페난트렌의 분해 반응)

  • Lee, Min-Joo;Lee, Byung-Dae
    • Journal of the Korean Chemical Society
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    • v.65 no.1
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    • pp.9-14
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    • 2021
  • In this study, the DFT calculation was performed using the B3LYP/6-31G(d,p) basis sets for the reaction process in which phenanthrene decomposes due to the chain reaction of two OH radicals on phenanthrene in the gaseous state of 298 K at 1 atm. As a result of the calculation, even when two OH radicals act on phenanthrene in a chain, the reaction for producing phenanthren-9-ol is predicted to be more advantageous than the reaction for producing phenanthren-1-ol. On the other hand, it was predicted that the OH addition process at room temperature would be advantageous for the priority of the OH addition and H abstraction process.

Identification of a Radical Decomposition Pathway(s) of Polycyclic Aromatic Hydrocarbon by the Vibrational Frequency Calculations with DFT Method (DFT법에 의한 진동 운동 진동수 계산을 통한 다고리 방향족 탄화수소의 라디칼 분해 경로 동정)

  • Lee, Byung-Dae;Ha, Kwanga;Lee, Min-Joo
    • Journal of the Korean Chemical Society
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    • v.62 no.5
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    • pp.344-351
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    • 2018
  • The IR spectra of gaseous phenanthrene, phenathrenols, phenanthrenyl radicals, and hydroxylphenanthrene radicals have been obtained using the BLYP/6-311++G(d,p) method. A comparison of these spectra shows that the measurements of IR spectra can be valuable to identify the reaction pathway(s) of the phenanthrene decomposition reaction by ${\cdot}OH$. We have found that the H atom abstraction reaction process can be easily identifiable from the $650-850cm^{-1}$ (CH out-of-plane bending) region and the ${\cdot}OH$ addition reaction process from the CH stretching and bending modes region of IR spectra. In addition, the calculated IR spectra of all five phenanthren-n-ols (n = 1, 2, 3, 4, 9) have also given in this work.

3,7-Dihydroxy-2,4,6-trimethoxyphenanthrene, A New Phenanthrene from Bulbophyllum Odoratissimum (Bulbophyllum Odoratissimum에서 추출한 새로운 페난트렌, 3,7-Dihydroxy-2,4,6-trimethoxyphenanthrene)

  • Chen, Ye-Gao;Xu, Jun-Ju;Yu, Hong;Qing, Chen;Zhang, Yan-Li;Liu, Ying;Wang, Ji-Hua
    • Journal of the Korean Chemical Society
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    • v.51 no.4
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    • pp.352-355
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    • 2007
  • A new phenanthrene derivative 3,7-dihydroxy-2,4,6-trimethoxyphenanthrene was isolated from the all plant of Bulbophyllum odoratissimum, and its structure was elucidated by extensive spectral studies and chemical transformation. The compound displayed cytotoxicity against the growth of human leukemia cell lines K562 and HL-60, human lung adenocarcinoma A549, human hepatoma BEL-7402 and human stomach cancer cell lines SGC-7901 with IC50 values of 14.23, 10.02, 3.42, 15.36 and 1.13 mg/ml respectively.

Phenanthrene-induced Oxidative DNA Damage of Lymphocytes and the Suppression by Ginseng Extract (페난트렌에 의한 임파구 DNA의 산화적 손상과 인삼추출물에 의한 억제)

  • Yoo, Ah-Reum;Lee, Mi-Young
    • Journal of Ginseng Research
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    • v.33 no.4
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    • pp.355-360
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    • 2009
  • Phenanthrene ($C_{14}H_{10}$) is a polycyclic aromatic hydrocarbon with three aromatic rings, and it can be produced by incomplete combustion of fossil fuels. Comet assay was used to examine the oxidative DNA damage of lymphocytes by phenanthrene and to measure the suppressive effects of ginseng extract on the DNA damage in this investigation. The in vitro oxidative DNA damage by phenanthrene increased in a dose-dependent manner in the lymphocyte. However, the DNA damage was significantly inhibited by ascorbate. Moreover, pretreatment, cotreatment and posttreatment with ginseng extract enhanced lymphocyte resistance to the phenanthrene-induced DNA damage. Phenanthrene enhanced the generation of intracellular reactive oxygen species, and the elevated reactive oxygen species level was reduced by treatment with ginseng extract.

Biotransformation of Arylnitroso Compound by Mammalian 1,4-Benzoquinone Reductase (포유동물 1,4-벤조퀴논 환원효소에 의한 아릴니트로소 화합물의 생변환)

  • 김경순;신해용
    • Journal of Life Science
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    • v.12 no.3
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    • pp.281-287
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    • 2002
  • Quinone reductase was purified to homogeneity from bovine liver and the purified enzyme catalyzed the reduction of phenanthrenequinone as well as benzo- and naphthoquinones. The enzyme catalyzed the biotransformation of arylnitroso nitroso compound and the reaction product was identified by TLC, GC, CC-MS and NMR. The reaction was almost entirely inhibitable by Cibacron blue 3GA or dicumarol, potent inhibitors of mammalian quinone reductase.

Synthesis of Unsymmetrical Trisannelated Benzenes (비대칭적으로 삼고리화된 벤젠의 합성)

  • Mahmoodi, Nosrat O.;Fatemeh, Mostaghni
    • Journal of the Korean Chemical Society
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    • v.46 no.1
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    • pp.52-56
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    • 2002
  • Synthesis of unsymmetrical trisannelated benzenes such as 2,3,4,5,6,7,8,9,10,11-decahydro-1H-cyclopenta[l]phenanthrene (1c) and 1,2,3,4,5,6,7,8,9,10-decahydrobenz[e]-as-indacene (1d) is described. The synthetic approach involves efficient condensation of pre-formed enones such as bicyclohexyliden-2-one (3), bicyclohexyl-1-en-2-one (4) and bicyclopentyliden-2-one (5) in the presence of cyclopentanone and cyclohexanone using anhydrous $CuCl_2$ as a catalyst.

Comparison in Structural Characteristics and Phenanthrene Sorption of Molecular Size-Fractionated Humic Acids (분자량 크기별 토양 휴믹산(HA)의 구조적 특성 및 페난트렌 흡착 반응특성 비교)

  • Lee, Doo-Hee;Kim, So-Hui;Shin, Hyun-Sang
    • Journal of Soil and Groundwater Environment
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    • v.20 no.7
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    • pp.70-79
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    • 2015
  • A sample of soil humic acid (HA) was divided by ultrafiltration (UF) into five fractions of different molecular size (UF1: > 300, UF2: 100~300, UF3: 30~100, UF4: 10~30, UF5: 1~10 kilodaltons). Apparent average molecular weight (Mw) of the HA fractions were measured using high performance size exclusion chromatography (HPSEC), and the chemical and structural properties of the five HA fractions were characterized by elemental compositions (H/C, O/C and w ((2O + 3NH)/ C)) and ultraviolet-visible absorption ratios (SUVA, A4/6). The organic carbon normalized-sorption coefficients (Koc) for the binding of phenanthrene to the HA fractions were determined by fluorescence quenching and relationship between the sorption coefficients and structural characteristics of the HA fractions were investigated. The elemental analysis and UV-vis spectral data indicated that the HA fractions with higher molecular weights have grater aliphatic character and lower contents of oxygen, while the HA fractions with lower molecular size have greater aromatic character and molecular polarity that correspond to greater SUVA and internal oxidation values (w). The log Koc values (L/kg C) were gradual increased from 4.45 for UF5 to 4.87 for UF1. The correlation study between the structural descriptors of the HA fractions and log Koc values of phenanthrene show that the magnitude of Koc values positively correlated with $M_w$ and H/C, while negatively correlated with the independent descriptors of the O/C, w, SUVA and A4/6.

Poly(phenanthrenequinone)-Poly(acrylic acid) Composite as a Conductive Polymer Binder for Submicrometer-Sized Silicon Negative Electrodes (서브마이크로미터 크기의 실리콘 음극용 폴리페난트렌퀴논-폴리아크릴산 전도성 고분자 복합 바인더)

  • Kim, Sang-Mo;Lee, Byeongil;Lee, Jae Gil;Lee, Jeong Beom;Ryu, Ji Heon;Kim, Hyung-Tae;Kim, Young Gyu;Oh, Seung M.
    • Journal of the Korean Electrochemical Society
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    • v.19 no.3
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    • pp.87-94
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    • 2016
  • In order to improve performances of submicrometer-sized Si negative electrode which shows larger volumetric change than nano-sized Si, composite binders are introduced by blending between poly(phenanthrenequinone) (PPQ) conductive polymer binder and poly(acrylic acid) (PAA) having good adhesion strength due to its carboxyl functional group. Blending between PPQ and PAA shows an effect that the adhesion strength of the Si electrode with the composite conductive binder is greatly improved after blending and this makes its better stable cycle performance. Blending ratios between PPQ and PAA in this work are 2:1, 1:1, 1:2 (by weight) and the best capacity retention at 50th cycle is observed in the electrode with the blending ratio 2:1 (named QA21). This is because that PPQ plays a role of conductive carbon among the Si particles or between Si particles and Cu current collector and PAA binds effectively the particles and the current collector. According to this synergetic effect, the internal resistance of the Si electrode with the blending ratio 2:1 is the smallest value. In addition, the Si electrode with PPQ-PAA composite binder shows the better stable cycle performance than the electrode with conventional super-P conductive carbon (20 wt.%).