FTIR的基本原理与结构.ppt

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1、FT-IR基本理论和系统结构ThermoFisher分子光谱部彭世烨Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.红外光谱概述傅里叶变换红外光谱仪FourierTransformInfraredSpectrometer（简写为FTIRSpectrometer）是基于对干涉后的红外光进行傅里叶变换的原理而开发的红外光谱仪Evaluationonly

2、.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.101010101010101097531-1-3-5WavenumbersX射线紫外可见近红外中红外远红外微波无线电波Wavelengthinmicrons核转变电子跃迁分子振动1010101010101010跃迁-5-3-113579转动红外光谱概述Evaluationonly.CreatedwithAspose.Slide

3、sfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.红外光谱概述红外光区的划分红外光谱波长范围约为0.75~1000µm，一般换算为波数。根据仪器技术和应用不同，习惯上又将红外光区分为三个区：近红外光区（0.75~2.5µm）13158-4000cm-1分子化学健振动的倍频和组合频。中红外光区（2.5~25µm）4000~400cm-1化学健振动的基频远红外光区（25~1000µm）400-10cm-1骨架振动，转动Evalu

4、ationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.红外光谱概述振动频率与光的频率匹配红外光分子吸收能量谱图Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.ClHNN红外光谱概述偶极矩发生变化，有红外吸收偶极距

5、为零没有红外吸收Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.CCCC伸缩振动弯曲振动BendingTwistingC+-红外光谱概述Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.100015

6、002000250030003500Wavenumbers(cm-1)指纹区官能团区红外光谱概述随着化学键的增加，光谱变得越来越复杂Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.傅立叶红外光谱仪的结构傅立叶光谱仪的主要组成光源干涉仪及分束器检测器主控板激光器Evaluationonly.CreatedwithAspose.Slidesfor.NE

7、T3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.傅立叶红外光谱仪的结构Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.傅立叶红外光谱仪的结构－－iS10IS10的内部结构图摩擦更小的动态准直干涉仪HeNe激光验证轮中红外光源CaF2涂覆的KBr窗片DLA-TGS检测器金刚石切削光镜光阑

8、外光路Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.傅立叶红外光谱仪的结构Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.傅立叶红外光谱仪的工作原理Evaluat