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Topic: Infrared spectroscopy

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In the News (Thu 20 Jun 19)

  Infrared Spectroscopy
Photon energies associated with this part of the infrared (from 1 to 15 kcal/mole) are not large enough to excite electrons, but may induce vibrational excitation of covalently bonded atoms and groups.
Infrared spectrometers, similar in principle to the UV-Visible spectrometer described elsewhere, permit chemists to obtain absorption spectra of compounds that are a unique reflection of their molecular structure.
Infrared spectra may be obtained from samples in all phases (liquid, solid and gaseous).
www.cem.msu.edu /~reusch/VirtualText/Spectrpy/InfraRed/infrared.htm   (1310 words)

  Infrared Spectroscopy
Infrared spectroscopy, or FTIR, is a type of absorption spectroscopy that uses the infrared portion of the electromagnetic spectrum to examine samples.
Infrared spectroscopy, or IR spectroscopy, focuses on the infrared section of the electromagnetic spectrum.
Infrared Spectroscopy of Biomolecules by Mantsch & Chapman
www.iscid.org /encyclopedia/Infrared_Spectroscopy   (413 words)

 Spectroscopy Summary
Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency.
Spectroscopy is often used in physical and analytical chemistry for the identification of substances through the spectrum emitted from them or absorbed in them.
Thermal infrared spectroscopy measures thermal radiation emitted from materials and surfaces and is used to determine the type of bonds present in a sample as well as their lattice environment.
www.bookrags.com /Spectroscopy   (6000 words)

 Infrared spectroscopy - Biocrawler   (Site not responding. Last check: )
Infrared spectroscopy (IR Spectroscopy) is a type of spectroscopy that uses the Infrared portion of the electromagnetic spectrum.
Infrared spectroscopy works because chemical bonds have specific frequencies at which they vibrate.
Infrared spectroscopy is widely used in both research and industry as a simple and reliable technique for measurement, quality control, and dynamic measurement.
www.biocrawler.com /encyclopedia/Infrared_spectroscopy   (988 words)

 Infrared spectroscopy - Wikipedia, the free encyclopedia
Infrared spectroscopy (IR Spectroscopy) is the subset of spectroscopy that deals with the Infrared part of the electromagnetic spectrum.
Infrared spectroscopy correlation tables are also tabulated in the literature.
The infrared portion of the electromagnetic spectrum is divided into three regions; the near-, mid- and far- infrared, named for their relation to the visible spectrum.
en.wikipedia.org /wiki/Infrared_spectroscopy   (1316 words)

 Infrared Spectroscopy - The Science of Spectroscopy
Infrared spectroscopy focuses on electromagnetic radiation in the frequency range 400-4000cm-1, where cm-1 is known as wavenumber (1/wavelength), which is a unit of measure for the frequency.
To generate the infrared spectrum, radiation containing all frequencies in the IR region is passed through the sample.
Infrared spectroscopy is very useful for qualitative analysis (identification) of organic compounds because a unique spectrum is produced by every organic substance with peaks corresponding to distinct structural features.
scienceofspectroscopy.info /edit/index.php?title=Infrared_Spectroscopy   (437 words)

K.R. Berry and M.A. Duncan, "Photoionization Spectroscopy of LiMg," Chem.Phys.
J.K. Agreiter, A.M. Knight and M.A. Duncan, "ZEKE-PFI Spectroscopy of the Al-(H
A.M. Knight, A. Stangassinger and M.A. Duncan, "Photoionization Spectroscopy of AuAr," Chem.
maduncan.myweb.uga.edu /spectroscopy.html   (1854 words)

 AECOM CSB Infrared Spectroscopy
is to combine the brightness of synchrotron infrared light and the chemical specificity of infrared spectroscopy in order to address important biological problems as diverse as the folding of proteins and the chemical structure of cells and tissues.
Synchrotron infrared light is 1000 times brighter than a conventional infrared source (like a globar that you find in a commercial FTIR spectrometer).
Infrared mapping of single cells is nearly impossible with a globar source.
www.aecom.yu.edu /home/csb/infrared.htm   (1161 words)

 Integrated Analysis at Louis C. Herring Laboratory
In the infrared region of the electromagnetic spectrum, light is absorbed as the vibrational stretching and bending of groups of covalently bonded atoms occur in response to excitation at specific wavelengths.
Infrared spectroscopy is useful for the identification of noncrystalline materials, including amorphous and fatty substances.
Infrared spectroscopy is useful also for the identification of the many artifacts that appear in calculi.
www.herringlab.com /herinte1.html   (1515 words)

 Infrared Spectroscopy in Astronomy
The infrared part of the spectrum is where the emission and absorption lines of virtually all molecules as well as numerous atoms and ions (electrically charged atoms) lie.
For example, infrared spectroscopy has shown that water is abundant in many regions of space and it is likely that the water we have here on Earth originated from stars which died out long before our solar system was formed.
Recent infrared spectral data have shown that complex organic molecules can form rapidly (over a few thousand years) in the environments around old stars and are abundant in many regions of space.
www.ipac.caltech.edu /Outreach/Edu/Spectra/irspec.html   (679 words)

 Infrared spectrometry
Preparation of Samples for IR Spectroscopy as KBr Disks
Enter a wavenumber, and a list of possible functional groups with their intensities is displayed.
Newsgroup for discussion of all areas of spectroscopy.
www.organicworldwide.net /infrared.html   (130 words)

 Infrared spectroscopy group at the Department of Biochemistry a
Using time-resolved infrared (FTIR) spectroscopy, we have been able to follow changes in the infrared spectrum of the ATPase when the ATPase is pumping calcium.
Time-resolved infrared spectroscopy is an excellent method for the study of molecular reactions.
Working on the catalytic function of enzymes we use a special variant of infrared difference spectroscopy which is based on a photolytically induced concentration jump: A biologically active substance is released from an inactive precursor (caged compound).
w3.dbb.su.se /~barth   (441 words)

Infrared and Raman spectroscopy can be utilized on small samples for variety of different applications, including forensics, contaminant analysis and etc. Learn more...
Infrared spectroscopy is gaining popularity in analyzing polymers, since it offers important information in characterization of heterogeneous polymeric materials.
Infrared Reflection Absorption Spectroscopy (IRRAS), FT-IR and Raman microscopy is a widely used tool to examine chemical structure, conformation, and orientation of molecules in ultrathin films on various substrates and at interfaces.
www.brukeroptics.com /applications   (283 words)

 Spectroscopy Software: mass spectrometry Near Infrared (NIR) Spectroscopy NMR Spectroscopy Atomic Absorption ...
Spectroscopy is a technique that uses the interaction of energy with a sample to perform an analysis.
In simplest terms, spectroscopy requires an energy source and a device for measuring the change in the energy source after it has interacted with the sample (a spectrophotometer or interferometer).
Near infrared spectroscopy is a spectroscopic method utilizing the near infra-red (NIR) region of the electromagnetic spectrum (from about 1000nm to 2500nm).
www.camo.com /rt/Resources/spectroscopy.html   (311 words)

 Infrared Spectroscopy (Conservation at the Getty)
Infrared spectroscopy is used to examine and characterize organic and inorganic materials.
Data is produced in the form of a spectrum, with many bands that represent chemical bonding between two particular atoms or a group of atoms in a molecule.
"Infrared Microspectrocopic Identification of Binding Media in Paint Cross-Sections: Application to Works of Art," Paper presented at Pittsburgh Conference, New York, March 1990.
www.getty.edu /conservation/science/about/ftir.html   (325 words)

 Dynamics: Infrared Spectroscopy
Vibrational spectroscopy (or infrared spectroscopy) measures transitions from one molecular vibrational energy level to another, and requires radiation from the infrared portion of the electromagnetic spectrum.
An IR spectrum is displayed as a plot of the energy of the infrared radiation (usually expressed in wavenumbers) versus the percent of light transmitted by the compound.
In this experiment, you and your colleagues will determine the infrared spectra of a large number of compounds in order to compile a data base from which generalizations relating spectral features to structure may be drawn.
www.wpi.edu /Academics/Depts/Chemistry/Courses/General/infrared.html   (3404 words)

 Fourier Transform Infrared Spectroscopy Study of the Secondary Structure of the Reconstituted Neurospora crassa Plasma ...
Fourier Transform Infrared Spectroscopy Study of the Secondary Structure of the Reconstituted Neurospora crassa Plasma Membrane H[IMAGE]-ATPase and of Its Membrane-associated Proteolytic Peptides -- Vigneron et al.
The secondary structure of intact ATPase and of the membrane-associated domain of ATPase was determined by infrared spectroscopy.
Polarized infrared spectroscopy reveals that the orientation of the helices is about perpendicular to the membrane.
www.jbc.org /cgi/content/abstract/270/30/17685   (522 words)

 Stockholm Center for Biomembrane Research - Barth group research
They produce changes in the infrared spectrum of the ATPase, from which conclusions can be drawn on the molecular mechanism of calcium pumping.
Liu, A. Barth (2004): Phosphorylation of the sarcoplasmic reticulum Ca2+-ATPase from ATP and ATP analogs studied by infrared spectroscopy.
Liu, A. Barth (2003): TNP-AMP binding to the sarcoplasmic reticulum Ca2+-ATPase studied by infrared spectroscopy.
www.cbr.su.se /content/view/76/60   (542 words)

 FTIR Fourier Transform Infrared Spectroscopy analytical services
FTIR spectroscopy is used primarily for qualitative and quantitative analysis of organic compounds, and also for determining the chemical structure of many inorganics.
Because chemical bonds absorb infrared energy at specific frequencies (or wavelengths), the basic structure of compounds can be determined by the spectral locations of their IR absorptions.
The plot of a compound's IR transmission vs. frequency is its "fingerprint", which when compared to reference spectra identifies the material.
www.photometrics.net /ftir.html   (211 words)

 [No title]
The Journal of Near Infrared Spectroscopy (JNIRS) is a bimonthly, peer review journal dedicated to all aspects of NIR spectroscopy and technology with the publication of original research papers, short communications, review articles and letters.
Infrared spectroscopy was used to monitor the conformational change of 2',3'-O-(2,4,6-trinitrophenyl)adenosine 5'-monophosphate (TNP-AMP) binding to the sarcoplasmic reticulum Ca2+-ATPase.
The goal of synchrotron infrared spectroscopy is to combine the brightness of synchrotron infrared light and the chemical specificity of infrared spectroscopy in order to address important biological problems as diverse as the folding of proteins and the chemical structure of cells and tissues.
www.lycos.com /info/spectroscopy--infrared-spectroscopy.html   (766 words)

 Infrared - Wikipedia, the free encyclopedia
Infrared spectroscopy is the examination of absorbtion and transmission of photons in the infrared energy range, based on their frequency and intensity.
Infrared radiation is used in infrared saunas to heat the occupants, and to remove ice from the wings of aircraft (de-icing).
Infrared radiation spectroscopy (see also near infrared spectroscopy) is the study of the composition of (usually) organic compounds, finding out a compound's structure and composition based on the percentage transmittance of IR radiation through a sample.
en.wikipedia.org /wiki/Infrared   (3077 words)

 99.05.07: Infrared Spectroscopy: A Key to Organic Structure
The infrared region of the electromagnetic spectrum falls between the visible and microwave portions and corresponds to wavelengths between 0.7 (m and 100 (m (1014 ñ1012 Hz or14,000-100 cm-1).
Molecular spectroscopy involves the absorption of electromagnetic radiation by the material whose molecular structure we are attempting to determine.
Organic molecules absorb infrared radiation when the frequency of IR radiation is synchronized with a natural vibration frequency of the molecule.
www.yale.edu /ynhti/curriculum/units/1999/5/99.05.07.x.html   (6810 words)

 Infrared identification of organic unknowns
This exercise is intended to familiarize you with the identification of functional groups in organic compounds using infrared spectra.
A molecule absorbs infrared radiation when the vibration of the atoms in the molecule produces an oscillating electric field with the same frequency as the frequency of incident IR "light".
At this point in your study of IR spectroscopy, you can't tell which compound is an aldehyde and which is a ketone.
www.800mainstreet.com /irsp/eir.html   (2022 words)

 MIT Spectroscopy - Biomedical Research Projects
Vibrational spectroscopy is a powerful technique to study hydrogen bonded systems because the frequency of the intramolecular OH stretching vibration is particularly sensitive to a molecule's hydrogen bonding environment.
We are using nonlinear infrared spectroscopy to follow time dependent changes in the OH stretching frequency of HOD in D 2 O. Molecular dynamics simulations serve to help connect measured spectroscopic observables with the ultrafast microscopic dynamics of liquid water.
Development of Nonlinear Infrared Spectroscopy: Nonlinear IR spectroscopy is rapidly becoming one of the leading methods of determining transient structures of complex molecules in solution.
web.mit.edu /spectroscopy/research/phys_research/lrf_09_tokmakoff.html   (489 words)

 IR Spectrum
Spectroscopy is the study of the interaction of electromagnetic radiation with matter.
There are many forms of spectroscopy, each contributing useful information to identify substances and to determine various characteristics of their structure.
An infrared spectrometer consists of a glowing filament that generates infrared radiation (heat), which is passed through the sample to be studied.
www.wag.caltech.edu /home/jang/genchem/infrared.htm   (2475 words)

 The Near Infrared Research Corporation
The Near Infrared Research Corporation is a source of assistance for anyone using near infrared spectroscopy for chemical analysis and the associated techniques of mathematics of spectroscopic data (Chemometrics).
The Near Infrared Research Corporation specializes in providing hardware and software for NIR spectroscopic analysis, and consulting services for a wide range of scientific problems relating to spectroscopy.
Spectroscopy, and especially Near Infrared Spectroscopy has many uses, but our interest is in helping people use Near-Infrared to do chemical analysis.
www.nearinfrared.com   (461 words)

 Infrared Spectroscopy
IR spectroscopy is the measurement of the wavelength and intensity of the absorption of mid-infrared light by a sample.
The wavelength of IR absorption bands are characteristic of specific types of chemical bonds, and IR spectroscopy finds its greatest utility for identification of organic and organometallic molecules.
A related vibrational spectroscopic method is Raman spectroscopy, which has a different mechanism and therefore provides complementary information to infrared absorption.
elchem.kaist.ac.kr /vt/chem-ed/spec/vib/ir.htm   (208 words)

 Infrared Spectroscopy Page
Basically, spectroscopy is the study of the interaction between electromagnetic radiations with matter.
The infrared region of the spectrum has much less energy than the visible or UV regions of the electromagnetic spectrum.
And there are different types of vibrations molecules can experience because when electrons move to higher energy levels they move through transitions or sub levels of energy states.
www.sas.upenn.edu /~rlucci/Infrared_Spectroscopy_Page1.html   (355 words)

 Infrared Spectroscopy
Infrared is a form of radiation that can travel through a vacuum while heat is associated with the motion and kinetic energy of molecules.
Infrared spectroscopy is the study of how molecules absorb infrared radiation and ultimately convert it to heat.
In cases where infrared spectroscopy is used as a criteria of identity, the spectra under comparison should be obtained under identical experimental conditions.
www.umsl.edu /~orglab/documents/IR/IR2.html   (12089 words)

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