Similar results were obtained for the weaker HCl and H2O complexes. Three bond stretching modes were observed for the N2‐‐H–F‐‐H–F complex. 展开 关键词: Chemical bonds Complex solids Fourier transform infrared spectroscopy DOI: 10.1063/1.449763 ...
C{double bond, long}N{single bond}N{double bond, long}C conformational isomers of 2′-hydroxyacetophenone azine: FTIR matrix isolation and DFT studyGrzegorzekJ.MielkeZ.FilarowskiA.ingentaconnectJournal of Molecular StructureGrzegorzek, J.; Mielke, Z.; Filarowski, A. C N-N C Conformational ...
酰胺键(Amide Bond)是一种由羧酸和胺反应而成的化学键,常见于多肽、蛋白质等生物大分子中。傅里叶变换红外光谱(Fourier Transform Infrared Spectroscopy,FTIR)是一种常用的分析技术,可以通过检测物质在红外光区的吸收谱来研究化学键和它们的环境。 在FTIR中,酰胺键的振动模式可以产生特征性的峰位和波形,从而提供有...
Low-temperature (15)N and (13)C CP/MAS (cross-polarization/magic angle spinning) NMR has been used to analyze BChl-histidine interactions and the electronic structure of histidine residues in the light-harvesting complex II (LH2) of Rhod... Alia,J Matysik,C Soede-Huijbregts,... - 《Jour...
If no carbonyl bands and no O-H bands are in the spectrum, check for double bonds, C:C, from an aromatic or an alkeneALKENE Look for weak absorption near 1650 cm1 for a double bond There will be a CH stretc 27、h band near 3000 cm-1.AROMATIC Look for the benzene, C:C, double...
结果表明,薄膜中含有 CN 键、 CN 键以及 C—N键,但样品中碳氮键总体数量偏少,N 含量偏低,N/C 比偏低。 改变制备工艺条件,薄膜中原子的化学结合状况会发生相应的变化。关键词: 氮化碳薄膜; 红外光谱; 磁控溅射中图分类号: O484.5 文献标识码: A 文章编号: 0253-6099(2006)03-0081-03Fourier...
N-methylmorpholine betaine forms a crystalline 1:1 complex with 3,4-dinitrophenol. Its structure was solved by X-ray diffraction; the crystal is monoclinic in space group P21/c. The morpholinium ring has a chair conformation with the CH2COO- substituent in the axial and the methyl group in ...
NoPeak (wave number cm −1)IntensityBondFunctional group assignmentRemark an assignment 1 3391 Weak broad O–H Hydroxyl group stretching vibrations of O–H bond in alcohols or phenols 2 2917 Strong C–H Alkane C–H Stretching alkanes 3 2849 Strong C–H Alkane C–H Stretching alkanes 4 173...
ftir分析方法（FTIRanalysismethod）ftir分析方法（FTIR analysis method）Two, group frequency and characteristic absorption peak Each molecule of the constituent molecule has its specific infrared absorption region. According to the nature of chemical bond, which can be divided into four regions: 4000 - ...
is absorption peak may be attributed to the overlap of hydrogen-bonded carbonyl group and aromatic ring C C double bond absorption, which gradually weakens with the deepening of coali cation. By analyzing the infrared spectrum of coal, it can be seen that the attenuation of 1600 cm−1 ...