红外吸收光谱法（IR）（Infraredabsorptionspectrum）•1、概述 波数（）=1/波长（）红外光谱：近红外光谱（=0.78~2.5m，=12800~4000cm-1）中红外光谱（=2.5~25m，=4000~400cm-1）远红外光谱（=25~1000m，=400~10cm-1）中红外区（4000~400cm-1）主要是...
我们使用PerkinElmer公司的Spectrum Frontier傅里叶变换 红外光谱仪采集样品红外光谱,且该红外光谱仪与9次反 射金刚石/硒化锌晶体的衰减全反射(ATR)采样附件搭配 使用。光谱采集分辨率为4cm-1,累积扫描时间60s。 图1. The Frontier FT-IR 结果和讨论 纯化合物和一些商业化样品的红外谱图 如图2是水杨酸甲酯、丁香酚...
IR wavelength range from 5000 to 1700–1000 cm 1may be covered by chalcogenide IR glass (CIR) fibres while polycrystalline infrared (PIR) fibres made of silver halides solid solutions transmit radiation of the whole most informative "finger-print" part of the spectrum from 3300 to 600 cm 1....
Select all major signals that would show on an IR spectrum of the molecule below. broad moderate absorption centered around3300cm-1 broad, strong absorption around2900cm-1 sharp absorption at3300cm-1 strong absorption near1740cm-1 dual peaks centere...
IR (Infraredabsorptionspectrum)•1、概述波数( )=1/波长( )红外光谱:近红外光谱( =0.78~2.5 m, =12800~4000cm -1 )中红外光谱( =2.5~25 m, =4000~400cm -1 )远红外光谱( =25~1000 m, =400~10cm -1 )中红外区(4000~400cm -1 )主要是振动吸收区,是有机物红外吸收的最重要范围。 0.8 m ...
Uses of the Infrared SpectrumThe infrared spectrum can be used for molecules much as a fingerprint can be force constant K, sp>sp2>sp3 sp sp2 sp3 ≡C-H = C-H -C-H 3300cm-1 3100cm-1 2900cm-1Resonance has the effect of reducing the force constant K, and the absorption moves...
IR spectrum of chloropentaamminecobalt(III) chloride, [COCI(NH3)5]Cl2 2000 1500 1000 450 987 95 90 85- 80- 75 3146.52cm-1 %T 70- 1449.440-1 65 1815.26cm-1 60 899,56cm-1 55 1000.47cm-1 1000 2000 1500 450 50 4B+ 4000 3500 3000 2600 cm-...
(Functionalgroupsandcharacteristicfrequency)特征频率是识别官能团的重要依据，它并非一成不变，而是处于一个区间内。通常，将一张红外光谱图分为两部分。1.4000～1500（或3800～1350）cm－1，是高波数区。特征吸收出现较多的区域，主要由伸缩振动引起，受其它因素影响小，称为基频区。2.1500以下（或1350～600）cm－...
的红外光照射下，在波数为4000-400cm-1的红外光照射下，样品分子吸收红外光会发生振动能级跃迁，外光会发生振动能级跃迁，所测得的吸收光谱称为红外吸收光谱图以波数波数为横谱(Infraredspectrum)，简称红外光谱(IR)。谱图以波数为横，简称红外光谱坐标，透光度为纵坐标来表示为纵坐标来表示：坐标，以透光度为纵...
IR光谱教案