Spectroscopic factors, influencing the accuracy of the atmospheric radiative transfer simulation in the methane absorption bands in the near infrared region

2013 ◽  
Vol 26 (5) ◽  
pp. 417-426 ◽  
Author(s):  
T. Yu. Chesnokova
Keyword(s):  
Radiative Transfer ◽  
Near Infrared ◽  
Infrared Region ◽  
Absorption Bands ◽  
Methane Absorption ◽  
Factors Influencing ◽  
Spectroscopic Factors ◽  
Atmospheric Radiative Transfer ◽  
Near Infrared Region

Spectrophotometry of Human Hemoglobin in the near Infrared Region from 1000 to 2500 nm

1994 ◽  
Vol 2 (2) ◽  
pp. 59-65 ◽  
Author(s):  
J. Todd Kuenstner ◽  
Karl H. Norris
Keyword(s):  
Near Infrared ◽  
Infrared Region ◽  
Second Derivative ◽  
Human Hemoglobin ◽  
Absorption Bands ◽  
Near Infrared Region ◽  
Absorbance Spectra

Absorbance and first and second derivative absorbance spectra and quarter-millimolar absorptivity coefficients for hemoglobin species including oxy-, deoxy-, carboxy- and methemoglobin in the visible and in the near infrared regions from 620 nm to 2500 nm are presented. At wavelengths longer than 1500 nm, the absorbance and second derivative absorbance spectra of hemoglobin species are similar for all of the species. Absorption bands are present centred at 1690, 1740, 2056, 2170, 2290 and 2350 nm.

Surface Plasmon Resonance with Electrospun Nanofibers on Gold Surface

2009 ◽  
Vol 1173 ◽  
Author(s):  
Kazuma Tsuboi ◽  
Hidetoshi Matsumoto ◽  
Mie Minagawa ◽  
Akihiko Tanioka
Keyword(s):  
Surface Plasmon ◽  
Near Infrared ◽  
Polarized Light ◽  
Electrospun Nanofibers ◽  
Gold Surface ◽  
Infrared Region ◽  
Peak Wavelength ◽  
Absorption Bands ◽  
Propagation Length ◽  
Near Infrared Region

AbstractIn this paper we report new excitation method of surface plasmon polariton (SPP) at air/gold interface with electrospun nanofibers. Nanofibers of polyvinylpirrolidone were electrospun onto the surface of a gold film. The observations by scanning electron microscopy and optical microscopy indicated that the average diameters of the nanofibers were about 300 nm and average sizes of pores were about 30-40 μm. Optical response of the nanofibers on gold surface was investigated by polarized reflection absorption spectroscopy (RAS). The RAS spectrum with p-polarized light showed two absorption bands while the spectrum with s-polarized light only one band. One is a band at about 520 nm that also found in the spectrum with s-polarized light. Another is a broad band in the near-infrared region which found only with p-polarized light. The peak intensity of the latter band increases with increase of incident angle of the polarized light and the peak wavelength of the band shifted to longer wavelength. These responses suggested that SPP at air/gold interface was excited with the scattering light from the electrospun nanofibers. We also found that the peak wavelength of the absorption band in near-infrared region changed with the increase of the amount of the nanofibers. This may be due to the fact that the sizes of the pores on gold surface became smaller than the propagation length of SPP, which resulted in scattering and interference of SPP.

Electrochromic tuning of transparent gold nanorods with poly[(3,4-propylenedioxy)pyrrole] shells in the near-infrared region

2017 ◽  
Vol 5 (47) ◽  
pp. 12571-12584 ◽  
Author(s):  
Jing Zhou ◽  
Ju-Won Jeon ◽  
James F. Ponder ◽  
Jeffrey A. Geldmeier ◽  
Mahmoud A. Mahmoud ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Near Infrared ◽  
Infrared Region ◽  
Absorption Bands ◽  
Nir Absorption ◽  
Near Infrared Region

An electrochemically tunable plasmonic system with narrow visible-NIR absorption bands was designed by synthesizing poly[(3,4-propylenedioxy)pyrrole] nanoshells onto a AuNR core.

Near infrared spectra of some cobalt(II) compounds

1968 ◽  
Vol 21 (7) ◽  
pp. 1775
Author(s):  
DP Graddon ◽  
GM Mockler
Keyword(s):  
Absorption Band ◽  
Absorption Spectra ◽  
Metal Atom ◽  
Infrared Spectra ◽  
Near Infrared ◽  
Infrared Region ◽  
Absorption Bands ◽  
Heterocyclic Base ◽  
Near Infrared Spectra ◽  
Near Infrared Region

Absorption spectra of compounds CoX2B2 and CoX2B4 (X = Cl, Br, I, or NCS; B = a heterocyclic base) have been obtained by reflectance and in solution in the near infrared region between 1000 and 2000 mμ. The spectra are characteristic of the stereochemistry of the metal atom: octahedral compounds have a single absorption band near 1100 mμ, e < 10; tetrahedral compounds have three overlapping absorption bands near 1100,1400, and 1700 mp, 30 < < 150. Comparisons are made with previously observed spectra of octahedral and tetrahedral species of the types CoL2+6 and CoX2-4.

Harmonic and Anharmonic Oscillator Models for Pure Vibrational Infrared Spectroscopy of Diatomic Molecules

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Rohit Singh
Keyword(s):  
Infrared Spectroscopy ◽  
Harmonic Oscillator ◽  
Absorption Spectra ◽  
Near Infrared ◽  
Anharmonic Oscillator ◽  
Diatomic Molecules ◽  
Infrared Region ◽  
Molecular Vibration ◽  
Absorption Bands ◽  
Near Infrared Region

In molecular vibrational infrared spectroscopy, absorption spectra arise from molecular vibration and correspond to transitions between the vibrational energy levels associated with a given electronic state of the molecule. The vibrational transitions, which fall in the near infrared region, are induced through the interaction of the molecular electric dipole with the electric vector of the electromagnetic radiation. The near infrared region extends roughly from 1?m to ?10?^2 ?m. The article explains the pure vibrational absorption spectra of diatomic molecules such as HCl, HBr, HI, CO, … etc. In order to explain the vibrational spectra, diatomic molecules are treated as harmonic oscillator and anharmonic oscillator. In the harmonic oscillator model, we get only one absorption band at the wavenumber value? ?_osc corresponding to frequency of oscillation?_osc while in the actual experimental data, there are many absorption bands corresponding to wave numbers slightly lesser than ? ?_osc, 2? ?_osc, 3? ?_osc, ……..The occurrence of these additional bandsis attributed to the selection rule ?v=±2, ±3, ±4, ……The additional bands are having lesser intensity and are called overtone bands.

scholarly journals Benzene-fused bis(acenaphthoBODIPY)s, stable near-infrared-selective dyes

RSC Advances ◽  
2018 ◽  
Vol 8 (25) ◽  
pp. 14072-14083 ◽  
Author(s):  
Hidemitsu Uno ◽  
Takayuki Honda ◽  
Manami Kitatsuka ◽  
Shogo Hiraoka ◽  
Shigeki Mori ◽  
...  
Keyword(s):  
Near Infrared ◽  
Visible Region ◽  
Infrared Region ◽  
Alder Reaction ◽  
Diels Alder ◽  
Strong Absorption ◽  
Absorption Bands ◽  
Diels Alder Reaction ◽  
Near Infrared Region

Benzene-fused bis(acenaphthoBODIPY)s prepared by retro-Diels–Alder reaction of bicyclo[2.2.2]octadiene-fused precursors showed strong absorption bands in the near-infrared region and very weak absorptions in the visible region.

Exchange of Oligonucleotide (dC15) on Single-walled Carbon Nanotubes

2012 ◽  
Vol 1407 ◽  
Author(s):  
Yuichi Kato ◽  
Ayaka Inoue ◽  
Naotoshi Nakashima ◽  
Yasuro Niidome
Keyword(s):  
Carbon Nanotubes ◽  
Near Infrared ◽  
Equilibrium Constants ◽  
Single Walled Carbon Nanotubes ◽  
Infrared Region ◽  
Sodium Cholate ◽  
Absorption Bands ◽  
Single Walled Carbon ◽  
Near Infrared Region ◽  
Walled Carbon Nanotubes

ABSTRACTExchange of solubilizers adsorbed on single-walled carbon nanotubes (CNTs) is probed by analysis of the peak shifts of the absorption bands of CNTs in the near-infrared region. Equilibrium constants and thermodynamic parameters of the exchange of sodium cholate for DNA (15-mers of oligo-DNAs, cytosine) on CNTs of different chirality are determined.

Variations in spectral reflectivity and vertical cloud structure of Jupiter’s Great Red Spot

2020 ◽  
Author(s):  
Asier Anguiano-Arteaga ◽  
Santiago Pérez-Hoyos ◽  
Agustín Sánchez-Lavega
Keyword(s):  
Radiative Transfer ◽  
San Francisco ◽  
Near Infrared ◽  
Hubble Space Telescope ◽  
Average Rate ◽  
Strong Interactions ◽  
Absorption Bands ◽  
Spectral Reflectivity ◽  
Methane Absorption ◽  
Different Depths

&lt;p&gt;The Great Red Spot (GRS) of Jupiter is a large anticyclonic vortex present in the Jovian atmosphere. First observed in the XVII century, it is almost constantly located at 22&amp;#176;S. Since its discovery it has gradually decreased in size at an average rate of 170 km/year in longitude and 60 km/year in latitude. The nature of the chromophore species that provide its characteristic color to the GRS&amp;#8217;s upper clouds and hazes is still largely unknown, as well as its creation and destruction mechanisms. During year 2019, the GRS began to lose some of this reddish material as a consequence of the interaction with other vortices present in nearby latitudes, raising serious doubts about its possible disappearance (S&amp;#225;nchez-Lavega et al., 2019).&lt;/p&gt; &lt;p&gt;In this work we have analyzed images provided by the Hubble Space Telescope between 2015 and 2019, with a spectral coverage from the ultraviolet to the near infrared, including some methane absorption bands of different depths. These images have been calibrated in absolute reflectivity, and from them we have obtained the spectral variations in brightness that occur in different dynamically interesting regions of the GRS and its surroundings.&lt;/p&gt; &lt;p&gt;The spectral reflectivity of the studied regions over the mentioned years has been analyzed using the NEMESIS radiative transfer code (Irwin et al., 2008). In this way it has been possible to retrieve the main features playing a key role in the spectral reflectivity of GRS&amp;#8217;s upper clouds and hazes, such as particle size distribution, refractive indexes and optical thickness. At the same time, this analysis has provided the vertical distribution of particles for pressure levels above 1 bar, allowing a comparative study of its evolution over recent years.&lt;/p&gt; &lt;p&gt;&lt;strong&gt;References&lt;/strong&gt;&lt;/p&gt; &lt;p&gt;-Irwin, P. G. J., Teanby, N. A., de Kok, R., Fletcher, L. N., Howett, C. J. A., Tsang, C. C. C., . . . Parrish, P. D. (2008, April). The NEMESIS planetary atmosphere radiative transfer and retrieval tool. &lt;em&gt;Journal of Quant. Spec. and Radiative Transfer&lt;/em&gt;, 109, 1136-1150. doi: 10.1016/j.jqsrt.2007.11.006&lt;/p&gt; &lt;p&gt;- S&amp;#225;nchez-Lavega, A., I&amp;#241;urrigarro, P., Anguiano-Arteaga, A., Garcia-Melendo, E., Legarreta, J., Hueso, R., Sanz-Requena, J.F., P&amp;#233;rez-Hoyos, S.,&amp;#160; Mendikoa, I., Soria, M., Rojas, J.F. Jupiter&amp;#8217;s Great Red Spot threatened along 2019 by strong interactions with close anticyclones, AGU Fall Meeting, P44A-01, San Francisco, 12 December 2019&lt;/p&gt;

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