共查询到16条相似文献,搜索用时 78 毫秒
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利用微量有机元素分析仪、红外光谱仪、核磁共振波谱仪鉴定了一种从杀菌防霉剂中分离出来的新型有机溴类杀菌剂,并且应用1D和2D核磁共振技术包含1H、13C、DEPT、1H—1HCOSY、HSQC、HMBC 6种NMR分析测试方法,对该杀菌剂的结构进行了确定,对其1H、13C信号进行了归属。 相似文献
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采用1H NMR、13C NMR、13C NMR对19F去偶、COSY、HSQC、HMBC等方法,对氟节胺的1H和13C NMR谱信号进行了归属。 相似文献
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通过1H-1H COSY、HSQC和HMBC等2D NMR技术对3-三氟甲基-4-[(4-甲基哌嗪-1-基)甲基]苯胺的1H NMR和13C NMR谱进行了全归属,给出了相应的耦合常数。 相似文献
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以三溴新戊醇、十二胺和1,3-丙磺酸内酯为原料,合成了一种新型的磺酸盐型三聚表面活性剂(3C12 TriS),并利用1 H NMR和元素分析进行了表征.通过铂金板法和稳态荧光探针法研究了3C12 TriS表面活性,采用分水时间法和振荡法测定了3C12 TriS的乳化性能和泡沫性能.结果表明,3C12 TriS具有较好的... 相似文献
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利用DEPT-135及二维核磁共振波谱实验^1H—^1H COSY、HMBC和HMQC等对盐酸克林霉素的1H和13C信号进行了全归属,并讨论了化合物中部分质子化学位移向低场位移的原因。 相似文献
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Summary The 1H and 13C NMR spectral assignments of polypropylene tacticity are revised using two-dimensional NMR techniques. The 13C-1H hetero-nuclear shift correlation (CSCM) permits all tactic sequences to be assigned on 1H NMR. The 1H NMR J-coupling connectivities are confirmed with 1H shift-correlated (COSY) experiments. These techniques enable correct assignments to be made of previously uncertain tactic sequences in the 1H and 13C NMR spectra of stereoirregular polypropylene. 相似文献
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Novel polymeric metal-free and metallo(Cu(II), Co(II), Ni(II), Zn(II) and Pb(II))–phthalocyanine complexes were synthesized using microwave irradiation and the products were purified by several (crystallization and preparative thin layer) techniques. The newly prepared compounds were characterized by a combination of elemental analyses, IR, 1H/13C NMR, 1H–1H COSY, MS and UV–Vis spectroscopy. In order to better understand the spectroscopy data (especially for 1H/13C NMR and 1H–1H COSY techniques), computational calculations were used for characterization at DFT/6-31G(d) level. The electronic spectra exhibited an intense π → π* transition with characteristic Q and B bands of the phthalocyanine core. 相似文献
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Microbial transformation studies conducted on isopimpinellin (1) by the fungus Glomerella cingulata have revealed that 1 was metabolized to give the corresponding reduced acid, 5,8-dimethoxy-6,7-furano-hydrocoumaric acid (2). The structure of metabolite 2 was elucidated by high-resolution mass spectrometry (HR-MS), extensive NMR techniques, including (1)H NMR, (13)C NMR, (1)H-(1)H correlation spectroscopy (COSY), heteronuclear multiple quantum coherence (HMQC) and heteonuclear multiple bond coherence (HMBC). The biotransformed product 2 showed weak a in vitro β-secretase (BACE1) inhibitory effect. 相似文献