对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其...对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其中含有大量的亚甲基碳、次甲基碳等油潜力碳,可加工成汽油、柴油等高附加值的燃料油;酸性组分中含有大量的酚基,可提取酚类化工原料;中性组分以多烷基芳烃化合物为主,可用于生产芳烃等有机化合物。低温煤焦油是一种有价值的化工原料,同时,高分辨NMR为低温煤焦油的结构研究提供了一种可靠的表征手段,具有一定的研究意义。展开更多
概述了核磁共振(nuclear magnetic resonance,NMR)技术的发展简史、基本原理及在植物研究中的应用。主要从核磁共振磷谱在植物磷分级、细胞p H值和木素结构研究中的应用,核磁共振氢谱在植物结构鉴定和代谢研究中的应用及碳谱在植物木素...概述了核磁共振(nuclear magnetic resonance,NMR)技术的发展简史、基本原理及在植物研究中的应用。主要从核磁共振磷谱在植物磷分级、细胞p H值和木素结构研究中的应用,核磁共振氢谱在植物结构鉴定和代谢研究中的应用及碳谱在植物木素结构、化学结构研究中的应用3个方面进行论述,探讨研究中存在的主要问题并提出研究展望,为今后的进一步研究提供参考。展开更多
In this paper the spectroscopic and the geometric properties of four ligands with pyrazole unit are studied at both experimental and computational levels.The computational results are perfectly in good agreement with ...In this paper the spectroscopic and the geometric properties of four ligands with pyrazole unit are studied at both experimental and computational levels.The computational results are perfectly in good agreement with the experimental results especially in terms of the IR,1 H-NMR and 13 C-NMR shifts.The spectroscopic features as well as the computed properties help to establish the successful synthesis of ligands bdmpzm and bdmpza.The theoretical and the experimental IR and Raman significantly help in distinguishing the four ligands.The results show that the Raman spectral is better applicable in characterising the CH3deformation,the C-H,CNN and CCNNout of the ligands but vibrations like N-H in dmpz and O-H,CO in bdmpza are observed to be Raman inactive.A significant variations are observed among the two available*N atoms characterising the bidentate features of bdmpzm,bdmpza and bdcpzm which indicates a possible different affinities for metal coordination.Also the result suggest that bdmpza will be the best starting material for NLO application than other while bdcpzm is predicted to have potential of been a poor coordinating ligand.The computed variations in the properties of*N atoms that are the characteristic features of their power of coordination can be of immense help since these type of ligands have a wide application in transition metal coordination.展开更多
文摘对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其中含有大量的亚甲基碳、次甲基碳等油潜力碳,可加工成汽油、柴油等高附加值的燃料油;酸性组分中含有大量的酚基,可提取酚类化工原料;中性组分以多烷基芳烃化合物为主,可用于生产芳烃等有机化合物。低温煤焦油是一种有价值的化工原料,同时,高分辨NMR为低温煤焦油的结构研究提供了一种可靠的表征手段,具有一定的研究意义。
文摘概述了核磁共振(nuclear magnetic resonance,NMR)技术的发展简史、基本原理及在植物研究中的应用。主要从核磁共振磷谱在植物磷分级、细胞p H值和木素结构研究中的应用,核磁共振氢谱在植物结构鉴定和代谢研究中的应用及碳谱在植物木素结构、化学结构研究中的应用3个方面进行论述,探讨研究中存在的主要问题并提出研究展望,为今后的进一步研究提供参考。
基金financial support of Govan Mbeki Research and Development Centre,University of Fort Hare,South Africa
文摘In this paper the spectroscopic and the geometric properties of four ligands with pyrazole unit are studied at both experimental and computational levels.The computational results are perfectly in good agreement with the experimental results especially in terms of the IR,1 H-NMR and 13 C-NMR shifts.The spectroscopic features as well as the computed properties help to establish the successful synthesis of ligands bdmpzm and bdmpza.The theoretical and the experimental IR and Raman significantly help in distinguishing the four ligands.The results show that the Raman spectral is better applicable in characterising the CH3deformation,the C-H,CNN and CCNNout of the ligands but vibrations like N-H in dmpz and O-H,CO in bdmpza are observed to be Raman inactive.A significant variations are observed among the two available*N atoms characterising the bidentate features of bdmpzm,bdmpza and bdcpzm which indicates a possible different affinities for metal coordination.Also the result suggest that bdmpza will be the best starting material for NLO application than other while bdcpzm is predicted to have potential of been a poor coordinating ligand.The computed variations in the properties of*N atoms that are the characteristic features of their power of coordination can be of immense help since these type of ligands have a wide application in transition metal coordination.
