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Related Concept Videos

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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Applications of IR Spectroscopy: Overview01:11

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The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
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IR Spectrum01:19

IR Spectrum

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When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
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IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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Advanced Infrared Technology and Applications 2020: introduction to the feature issue.

Marija Strojnik, Mario D'Acunto, Antoni Rogalski

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    This summary is machine-generated.

    This special issue presents expanded research on advanced infrared technology and applications (AITA) from a 2019 conference. It includes contributions from conference attendees and other infrared (IR) practitioners.

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    Area of Science:

    • Optics and Photonics
    • Infrared Technology

    Background:

    • The Applied Optics (AO) special issue focuses on advanced infrared technology and applications (AITA).
    • It compiles papers from the 2019 AITA conference held in Florence, Italy.

    Purpose of the Study:

    • To publish expanded and refereed papers from the AITA conference.
    • To include additional contributions from the broader infrared (IR) research community.

    Main Methods:

    • Inviting authors who presented at the AITA conference to submit expanded versions of their papers.
    • Issuing a call for papers in AO and direct contact with IR practitioners.

    Main Results:

    • A collection of significantly expanded refereed papers on advanced infrared technology.
    • Inclusion of diverse contributions from conference participants and external IR experts.

    Conclusions:

    • The special issue serves as a comprehensive resource for recent advancements in infrared technology and applications.
    • It highlights the collaborative efforts within the IR research field.