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1.
本文研究了α,α'-二氧代烯酮环二硫代缩酮的酮基与碳碳双键的特征红外光谱,指出了它们随化学结构而变化的规律。 相似文献
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α,α′—二氧代烯酮环二硫代缩酮的特征红外光谱(II) 总被引:2,自引:2,他引:0
本文在前文的基础上继续研究了α,α′-二氧代烯酮环二硫代缩酮的其他一些特征红外光谱,指出了它们随化学结构而变化的规律。 相似文献
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本文在前文[1]的基础上继续研究了α,α′-二氧代烯酮环二硫代缩酮的其他一些特征红外光谱,指出了它们随化学结构而变化的规律。 相似文献
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用1-二甲氨基2,3-二氯丙烷和O,O-二甲基-二硫代磷酸盐反应合成了一种新的有机磷杀虫剂沙蚕磷,还制备了它的草酸盐。用^1H、^13C核磁共振波谱,红外光谱及质谱法表征了沙蚕磷草酸盐的分子结构,结果表明反应产物是1,3-二取代产物。 相似文献
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研究了5种α,α‘-二氧代烯酮环二硫代缩酮类化合物的碳基、碳碳双键、碳硫等一些特征红外光谱,尤其着重研究了共轭体系下的各种特征谱带随化学结构而变化的规律。 相似文献
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本文研究了α,α′-二氧代烯酮环二硫(氮)代缩酮的紫外光谱,指出了它们随化学结构而变化的一些特征。 相似文献
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本文研究了α,α'-二氧代烯酮环二氮代缩酮的特征红外光谱,指出了它们随化学结构而变化的规律。 相似文献
10.
本文研究了α,α'-二氧代烯酮环二硫(氮)代缩酮的紫外光谱,指出了它们随化学结构而变化的一些特征。 相似文献
11.
三烷基氧化膦及其萃合物的红外光谱研究 总被引:1,自引:1,他引:0
三烷基氧化膦是一种新型的镧系元素和锕系元素萃取剂,本文研究了其红外光谱特征及其与稀土元素和硝酸所形成的萃合物的红外光谱。 相似文献
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3,5‐Pyrazoledicarboxylic acid was used as a ligand for the synthesis of its Ce(III) and Nd(III) complexes. The complexes of Ce(III) and Nd(III) with 3,5‐pyrazoledicarboxylic acid were synthesized and their compositions were determined by elemental analysis. Vibrational study in the solid state of 3,5‐pyrazoledicarboxylic acid and its new Ce(III) and Nd(III) complexes was performed by IR and Raman spectroscopy. The changes observed between the IR and Raman spectra of the ligand and of the complexes allowed us to establish the coordination mode of the metal in both complexes. The comparative vibrational analysis of the free ligand and its lanthanide(III) complexes gave evidence that 3,5‐pyrazoledicarboxylic acid binds Ln(III) through the deprotonated carboxylic oxygens. The density functional theory (DFT) calculated geometries, harmonic vibrational modes and Raman scattering activities of the ligand were in good agreement with the experimental data, and a complete vibrational assignment is being proposed. The experimental IR and Raman bands of the ligand were assigned to normal modes on the basis of DFT calculations. The effect of the intramolecular hydrogen bonds in the ligand on vibrational mode positions is also discussed. The characteristic IR and Raman bands of 3,5‐pyrazoledicarboxylic acid and its lanthanide complexes were specified and discussed. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
14.
G. B. Tolstorozhev I. V. Skornyakov V. I. Pekhnio A. N. Kozachkova N. I. Sharykina 《Journal of Applied Spectroscopy》2012,79(3):453-458
We have used Fourier transform IR spectroscopy methods to study normal mouse lung tissue and also after subcutaneous transplantation
of a B-16 melanoma tumor in the tissue. We also studied tissues with B-16 melanoma after they were treated with coordination
compounds based on palladium complexes of methylenediphosphonic acid. The IR spectra of the lung tissues with metastases in
the region of the C = O stretching vibrations are different from the IR spectra of normal tissue. We identified spectroscopic
signs of the presence of metastases in the lung. We show that when a cancerous tumor is treated with a preparation of palladium
complexes of methylenediphosphonic acid, the spectroscopic signs of the presence of metastases in the lung are missing. After
treatment with the optimal dose of this drug, the IR spectrum of the lung tissue in which multiple metastases were present
before treatment corresponds to the spectrum of normal tissue. We have determined the efficacy of the antitumor activity of
coordination compounds based on palladium complexes of methylenediphosphonic acid. 相似文献
15.
Ko-Ki Kunimoto Kouji Kimura Takatomo Takai Hitoshi Senda Motoo Shiro Akio Kuwae 《光谱学快报》2013,46(4):509-522
Two polymorphic forms (I and II) of 4-fluorophenylpyruvic acid (F-PPA) were obtained by crystallization from different solvents, showing a melting point at 163.2 and 171.0 °C. Crystal structures of polymorphs I and II were determined by X-ray crystallography. IR and Raman spectra of the two polymorphs were measured and the spectral characteristics were compared with those of phenylpyruvic acid. the two polymorphs show similar molecular and crystal structures to each other, except for the molecular geometries of the enol and the carboxylic acid moieties. Distinct IR spectral differences which result from the crystal field splitting were observed between the two polymorphs. 相似文献
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研究表明过量高果糖摄入可诱导胰岛素抵抗(IR).葛根芩连汤(GQD)是临床常用的治疗2型糖尿病和胰岛素抵抗的中药之一,但其对果糖诱导的胰岛素抵抗的肠道菌群影响的相关研究甚少.本文采用基于核磁共振氢谱(1H NMR)的代谢组学方法研究了GQD对高果糖诱导的胰岛素抵抗大鼠粪便代谢组的调控作用.通过连续8周给予大鼠10%果糖水喂养,成功建立胰岛素抵抗大鼠模型,GQD治疗组在果糖水喂养第5周至第8周同时给予GQD(18.2g/kg/day)灌胃.结果表明:与正常对照组相比,胰岛素抵抗模型组大鼠的饮水量、饮食量、体重和IR指数明显增加,空腹血糖值在第8周明显上升.在第8周末期,GQD治疗组的IR指数较胰岛素抵抗模型组显著降低,并且代谢紊乱得到改善:与胰岛素抵抗模型组相比,GQD治疗组胰岛素抵抗中丙酸、乙酸、琥珀酸、牛磺酸和甘油水平增加;而正丁酸、丙氨酸和谷氨酸的含量降低.这一结果表明GQD能够改善胰岛素抵抗所引起的大鼠氨基酸代谢、脂肪酸氧化和肠道微生物代谢等代谢紊乱状态. 相似文献
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熊果酸的Raman光谱和红外光谱结构特征比较 总被引:4,自引:0,他引:4
本文采用HRD2型双光栅单色仪测定了熊果酸的Raman光谱,得到熊果酸的特征Raman光谱结构,采用Philips 100型双光栅单色仪测定了熊果酸的IR光谱,得到熊果酸的特征IR光谱结构;解析了熊果酸的Raman光谱和IR光谱与其结构特征的关系,确定了熊果酸的Raman光谱的结构特征和官能团的归属,给出了熊果酸的两个基本骨架特征区域(A区:1386,1370,1363cm^-1,B区:1304,1269,1237cm^-1);对熊甲酸的Raman光谱和IR光谱作了比较研究,指出Raman光谱具有比IR光谱更为丰富的结构信息的特征,并且,IR光谱的主要特征峰在Raman光谱中均有对应的谱峰;Raman光谱的谱峰形态清晰可变,使熊果酸的主要结构和官能团得到准确的分析和指认,与IR光谱一样,Raman光谱是天然药物解析的有效手段之一。 相似文献
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新型L-丙氨酸尾式卟啉锌配合物的合成及其傅里叶变换红外光谱研究 总被引:3,自引:0,他引:3
合成了一种新型L-丙氢酸尾式卟啉及其锌配合物,测试并研究了它们在4000-400cm^-1范围内的傅里叶变换红外光谱,对主要谱带进行了经验归属,研究发现,在锌配合物的谱带中3316.9cm^-1、965.8cm^-1和728.cm^-1谱带消失,而在1002cm^-1处出现了四苯基卟啉衍生物所特有的卟啉环骨架的强吸收带,这是Zn(Ⅱ)离子与氨基酸尾式卟啉形成配合物的显著特征。卟啉环的结构敏感谱带出现在1470、1442、1350、1002、994和796cm^-1处。 相似文献
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Co,Mn,Ni的联苯酸配合物的合成及光谱研究 总被引:2,自引:0,他引:2
合成了联苯酸 ,并以其和吡啶为配体 ,制备了第一过渡系金属离子Co(Ⅱ ) ,Mn(Ⅱ ) ,Ni(Ⅱ )的 3种配合物 ,并通过元素分析、IR及UV等手段对配合物进行了表征 ,推测了可能的组成和结构。 相似文献
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掺杂功能磺酸的导电聚苯胺的合成及其红外光谱研究 总被引:8,自引:0,他引:8
合成了参杂对甲苯磺酸(TSA),十二烷基苯磺酸(DBSA),樟脑磺酸(CSA)和磺基水杨酸(SSA)的导电聚苯胺要品:Dpan/TS,Dpan/DBSA,Dpan/CSA,Dpan/SSA,并对这些样品进行了表征,研究了它们的红外光谱特性。 相似文献