Ir spectroscopy
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IR spectroscopy involves the interaction of infrared radiation with matter. Molecules absorb characteristic frequencies of IR radiation depending on their natural vibrational frequencies. This allows IR spectroscopy to be used to determine a molecule's structure by identifying its functional groups. An IR spectrometer consists of a light source, sample holder, monochromator, and detector. It measures the infrared light absorbed by a sample to produce an IR spectrum that can be used for applications like compositional analysis, detection of impurities and functional groups, and structural elucidation of organic compounds.
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Given:
A = Absorbance = 1
l = Path length = 2 cm
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Infrared spectroscopy analyzes the interaction of molecules with infrared light, detecting frequencies absorbed that are characteristic of molecular structures and functional groups, allowing identification of substances; an infrared spectrophotometer directs infrared light through a sample using various optical components, and a detector converts absorbed light into an electrical signal providing an infrared spectrum for analysis.Fourier transform infrared spectroscopy (FTIR) Likhith K
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This document provides an overview of Fourier transform infrared (FTIR) spectroscopy. It discusses the electromagnetic spectrum and how infrared radiation interacts with molecular bonds to produce vibrational modes. The basic principles of FTIR are explained, including how an interferogram is produced and transformed into an infrared absorption spectrum using Fourier transform. Common instrumentation components like detectors, radiation sources, and sample holders are also mentioned. The document serves as an introduction to FTIR spectroscopy and the molecular information it can provide through analysis of infrared absorption spectra.IR spectroscopy
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This document discusses the use of infrared spectroscopy (IR) to determine the functional groups of compounds. It provides background on IR spectroscopy, including how IR radiation causes molecular vibrations and the types of vibrational modes that can be observed. It also describes the basic components of IR instruments, including sources that emit IR radiation, detectors, and the mechanisms of dispersive and Fourier transform IR spectrometers. The document serves to explain how IR spectroscopy can be used to identify functional groups present in compounds based on their vibrational absorption spectra.Infrared spectroscopy i
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The document provides a comprehensive overview of infrared spectroscopy, including its principles, instrumentation, and applications. It discusses the absorption of infrared radiation, vibrational modes of molecules, and factors influencing absorption frequencies, while comparing infrared and Raman spectroscopy. Additionally, it outlines sampling techniques and the significance of group frequencies in analyzing different compounds.AYUSHI (IR SPECTROSCOPY)2221940018new.pptx
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The document is a comprehensive overview of infrared (IR) absorption spectroscopy, detailing its basic theory, principles, types of molecular vibrations, and applications in identifying functional groups and studying reactions. It explains the structural significance of absorption bands, particularly in characterizing compounds, as well as the factors influencing vibrational frequencies. The document also includes numerical problems to illustrate the application of IR spectroscopy in distinguishing between various chemical compounds.Prabhakar singh ii sem-paper-ir spectroscopy & fluorimetry
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Ir spectroscopy
- 1. IR SPECTROSCOPY Presentation by:- Dr. Willy J. Shah Asst. Professor Vartak College, Vasai Rd. This work is licensed under a creative common Attribution Noncommerical ShareAlike 4.0 International License 1
- 2. IR spectroscopy involves the interaction of infrared radiation with matter. IR spectroscopy is also called as vibrational spectroscopy. It is mostly based on absorption spectroscopy. IR region ranges from 14000cm-1 to 10cm-1 IR portion of the electromagnetic spectrum is usually divided into three regions; near, mid and far. Mid region ranging from 4000-400cm-1 is used in the analysis of chemical substances. 2 INTRODUCTION https://en.wikipedia.org/wiki/Infrared_spectroscopy
- 3. Molecules are made up of atoms and bonds, their movement is like spring and ball. This characteristic vibration are called natural frequency of vibration. When the applied infrared frequency matches with natural frequency of vibration then IR radiation are absorbed and a peak is observed. Different functional group absorb characteristic frequencies of IR radiation and hence give characteristic peak. Only those molecules are IR active which have dipole moment 3 PRINCIPLE /razaram1/introduction-and-principle-of-ir- spectroscopy-25872192
- 5. 1) Light Source - Emits light of different wavelength. Nerst glower lamp, CO2 Laser and Hg arc lamp are employed 2) Sample Holder Made up of alkali halides like NaCl or KBr. Solid, liquid and gases can be analysed. For solid press pellet technique is used. Whereas there are separate assemblies having KBr window to analyse liquid and gas 3) Monochromator - selects particular wavelength of light. Prisms or grating sheets are used. 4) Detector measures light transmitted from the sample. Photon detectors and thermal detectors are used. 5 /rakhirrajan1/infrared-spectroscopy-50410465
- 6. Compositional analysis of organic and inorganic compound. Detection of impurities. Detection of functional groups. Structural elucidation of organic compounds. Quantitative and qualitative analysis of pharmaceutical substances. 6 APPLICATIONS /rakhirrajan1/infrared-spectroscopy-50410465