Structural Studies of Ribonuclease. IV. The Near Infrared Absorption of the Hydrogen-Bonded Peptide NH Group1,2

1960 ◽  
Vol 82 (19) ◽  
pp. 5156-5160 ◽  
Author(s):  
Jan Hermans ◽  
Harold A. Scheraga
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Structural Studies ◽  
Hydrogen Bonded

Synthesis of Nanotubule-Forming Cyclic Octapeptides via an Fmoc Strategy

1998 ◽  
Vol 51 (7) ◽  
pp. 535 ◽  
Author(s):  
Martina E. Polaskova ◽  
John N. Lambert ◽  
Nicholas J. Ede
Keyword(s):  
Aqueous Solutions ◽  
Infrared Absorption ◽  
Structural Studies ◽  
Protection Strategy ◽  
Fmoc Chemistry ◽  
Orthogonal Protection ◽  
Fmoc Strategy ◽  
Cyclic Octapeptide ◽  
Head To Tail Cyclization ◽  
Hydrogen Bonded

New syndiotactic cyclic octapeptides, namely cyclo(–D-Phe-L-Asp–D-Phe–L-Asn–D-Phe–L-Asp–D-Phe–L-Asn–) (1) and cyclo(–D-N-MeAla–L-Asp–D-N-MeAla–L-Asn–D-N-MeAla–L-Asp–D-N-MeAla–L-Asn–) (2), have been prepared, and preliminary structural studies have been conducted. The synthesis of the linear peptides was performed by using Fmoc chemistry, and head-to-tail cyclization was accomplished by using an orthogonal protection strategy and a support-bound cyclization step. Acidification of aqueous solutions of cyclic octapeptide (1) initiated formation of needlelike crystals whose morphology and infrared absorption behaviour suggested that they were hydrogen-bonded nanotubular aggregates of (1).

Study on the Near-infrared Absorption Properties of ZnGeP2 Single Crystals

2010 ◽  
Vol 25 (10) ◽  
pp. 1029-1033
Author(s):  
Shi-Xing XIA ◽  
Chun-Hui YANG ◽  
Chong-Qiang ZHU ◽  
Tian-Hui MA ◽  
Meng WANG ◽  
...  
Keyword(s):  
Single Crystals ◽  
Infrared Absorption ◽  
Near Infrared ◽  
Absorption Properties

Pyrrole-bridged quinones: π-electronic systems that modulate electronic structures by tautomerism and deprotonation

2021 ◽  
Author(s):  
Shinya Sugiura ◽  
Hiromitsu Maeda
Keyword(s):  
Infrared Absorption ◽  
Electronic Structures ◽  
Near Infrared ◽  
Ion Pairing ◽  
Anion Binding ◽  
Electronic Systems

A new series of π-extended quinone derivatives containing a pyrrole bridge exhibited NH/OH-type tautomerization and anion binding along with deprotonation that induced near-infrared absorption and ion-pairing assemblies.

scholarly journals Characterization and mapping of hematite ore mineral classes using hyperspectral remote sensing technique: a case study from Bailadila iron ore mining region

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Ibrahim Shaik ◽  
S. K. Begum ◽  
P. V. Nagamani ◽  
Narayan Kayet
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Spectral Feature ◽  
Absorption Feature ◽  
X Ray ◽  
Remote Sensing Technique ◽  
Ore Minerals ◽  
Feature Fitting ◽  
Hematite Ore

AbstractThe study demonstrates a methodology for mapping various hematite ore classes based on their reflectance and absorption spectra, using Hyperion satellite imagery. Substantial validation is carried out, using the spectral feature fitting technique, with the field spectra measured over the Bailadila hill range in Chhattisgarh State in India. The results of the study showed a good correlation between the concentration of iron oxide with the depth of the near-infrared absorption feature (R2 = 0.843) and the width of the near-infrared absorption feature (R2 = 0.812) through different empirical models, with a root-mean-square error (RMSE) between < 0.317 and < 0.409. The overall accuracy of the study is 88.2% with a Kappa coefficient value of 0.81. Geochemical analysis and X-ray fluorescence (XRF) of field ore samples are performed to ensure different classes of hematite ore minerals. Results showed a high content of Fe > 60 wt% in most of the hematite ore samples, except banded hematite quartzite (BHQ) (< 47 wt%).

The Diradical‐Dication Strategy for BODIPY‐ and Porphyrin‐Based Dyes with Near‐Infrared Absorption Maxima from 1070 to 2040 nm

2018 ◽  
Vol 24 (72) ◽  
pp. 19341-19347 ◽  
Author(s):  
Houjia Wei ◽  
Rui Feng ◽  
Yong Fang ◽  
Lei Wang ◽  
Chao Chen ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Near Infrared

An A–D–A′–D–A type small molecule acceptor with wide absorption spectrum and near-infrared absorption

2018 ◽  
Vol 2 (12) ◽  
pp. 2333-2339 ◽  
Author(s):  
Junhui Miao ◽  
Junxia Wang ◽  
Bin Meng ◽  
Jun Liu ◽  
Lixiang Wang
Keyword(s):  
Absorption Spectrum ◽  
Small Molecule ◽  
Infrared Absorption ◽  
Near Infrared

We report a new A–D–A′–D–A type small molecule acceptor with a wide absorption spectrum spanning from 300 nm to 900 nm and a bandgap of only 1.39 eV.

An extending broadband near-infrared absorption of Si-based deep-trench microstructures

2017 ◽  
Vol 392 ◽  
pp. 59-63 ◽  
Author(s):  
Haigui Yang ◽  
Xiaoyi Liu ◽  
Jinsong Gao ◽  
Xiaoyi Wang ◽  
Hai Liu ◽  
...  
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Deep Trench

Near Infrared Absorption Spectrophotometry

1952 ◽  
Vol 6 (5) ◽  
pp. 29-40 ◽  
Author(s):  
James L. Lauer ◽  
E. J. Rosenbaum
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Absorption Spectrophotometry
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