Universal Spectropolarimeter Based on Overtone Circular Dichroism Measurements in the Near-Infrared Region

1994 ◽  
Vol 66 (21) ◽  
pp. 3639-3643 ◽  
Author(s):  
Chieu D. Tran ◽  
Victor I. Grishko
Keyword(s):  
Circular Dichroism ◽  
Near Infrared ◽  
Infrared Region ◽  
Near Infrared Region ◽  
Circular Dichroïsm

Chiral carbazole-based porphyrins showing absorption and circular dichroism in the near-infrared region

2020 ◽  
Vol 24 (01n03) ◽  
pp. 247-251
Author(s):  
Chihiro Maeda ◽  
Tadashi Ema
Keyword(s):  
Circular Dichroism ◽  
Near Infrared ◽  
Infrared Region ◽  
Nir Absorption ◽  
Near Infrared Region ◽  
Induced Aggregation ◽  
First Time ◽  
Circular Dichroïsm

Chiral carbazole-based porphyrins were synthesized for the first time via the incorporation of hydrobenzoin units at the thiophene moieties. They showed absorption and circular dichroism in the near-infrared (NIR) region. The NIR absorption was further red-shifted by solvent-induced aggregation.

scholarly journals The nature of haem a3 in the oxidized state of cytochrome c oxidase. Evidence from low-temperature magnetic-circular-dichroism spectroscopy in the near infrared region

1982 ◽  
Vol 207 (1) ◽  
pp. 167-170 ◽  
Author(s):  
A J Thomson ◽  
D G Englinton ◽  
B C Hill ◽  
C Greenwood
Keyword(s):  
Circular Dichroism ◽  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Near Infrared ◽  
Magnetic Circular Dichroism ◽  
Infrared Region ◽  
Magnetic Circular Dichroism Spectroscopy ◽  
Near Infrared Region ◽  
Circular Dichroïsm ◽  
Inhibited Enzyme

The magnetic-circular-dichroism (m.c.d.) spectra of oxidized ‘resting’ bovine cytochrome c oxidase and the cyanide-inhibited form are reported at 5.15 T and at 4.2 K along with m.c.d. magnetization curves plotted at selected wavelengths. In both spectra there are features at 790nm and 1564nm due to Cua and haem a respectively, the e.p.r.-detectable components of the enzyme. There is a new peak at 1946nm only in the spectrum of the cyanide-inhibited enzyme. Arguments are advanced that assign this to low-spin ferric haem a3 bridged to Cua3, thereby forming a ferromagnetically coupled pair of metal ions.

scholarly journals Enhanced circular dichroism in hybrid graphene–metal metamaterials at the near-infrared region

2020 ◽  
Vol 473 ◽  
pp. 125947 ◽  
Author(s):  
Li Hu ◽  
Hongxia Dai ◽  
Feng Xi ◽  
Yuxia Tang ◽  
Fayin Cheng
Keyword(s):  
Circular Dichroism ◽  
Near Infrared ◽  
Infrared Region ◽  
Near Infrared Region ◽  
Circular Dichroïsm

Magnetic circular dichroism of Pseudomonas putida cytochrome P-450 in near infrared region

1978 ◽  
Vol 534 (2) ◽  
pp. 285-294 ◽  
Author(s):  
Tsunenori Nozawa ◽  
Toru Shimizu ◽  
Masahiro Hatano ◽  
Hideo Shimada ◽  
Tetsutaro Iizuka ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Pseudomonas Putida ◽  
Near Infrared ◽  
Magnetic Circular Dichroism ◽  
Infrared Region ◽  
Near Infrared Region ◽  
Cytochrome P 450 ◽  
Circular Dichroïsm

Step-Scan Fourier Transform Vibrational Circular Dichroism Measurements in the Vibrational Region above 2000 cm−1

1997 ◽  
Vol 51 (4) ◽  
pp. 508-511 ◽  
Author(s):  
Fujin Long ◽  
Teresa B. Freedman ◽  
Thomas J. Tague ◽  
Laurence A. Nafie
Keyword(s):  
Fourier Transform ◽  
Circular Dichroism ◽  
Near Infrared ◽  
Optical Transition ◽  
Signal To Noise Ratio ◽  
Infrared Region ◽  
Vibrational Circular Dichroism ◽  
Ft Ir ◽  
Combination Bands ◽  
Circular Dichroïsm

We present the results of a new Fourier transform infrared vibrational circular dichroism (FT-IR-VCD) spectrometer optimized for performance in the near-infrared region above 2000 cm−1. The instrument is capable of operating in either the conventional rapidscan mode or the step-scan mode and is designed around the Bruker IFS 55 FT-IR spectrometer. We find that in the region of hydrogen stretching, the instrument performs as well as or better than (depending on the spectral coverage and resolution desired) a corresponding dispersive grating VCD spectrometer, with noise levels at approximately 10−6 Δ A units for a two-hour collection at 8-cm−1 resolution. The performance is approximately a factor-of-2 better in signal-to-noise ratio in optimized step-scan operation in comparison to the corresponding results in rapid-scan operation. The reasons are traced to advantages in electronic filtering and undersampling efficiency in step-scan mode. It is expected that the advantages of step-scan will increase with increasing optical transition frequency, such as the region of overtone and combination bands between 4000 and 8000 cm−1.

Ligand Influence Versus Electronic Configuration of d-metal Ion in Determining the Fate of NIR Emission from LnIII Ions: A Case Study with CuII, NiII and ZnII Complexes.

2021 ◽  
Author(s):  
Abhineet Verma ◽  
Sk Saddam Hossain ◽  
Sailaja S Sunkari ◽  
Joseph Reibenspies ◽  
Satyen Saha
Keyword(s):  
Metal Ion ◽  
Selection Rule ◽  
Near Infrared ◽  
Electronic Configuration ◽  
Infrared Region ◽  
Direct Excitation ◽  
Characteristic Emission ◽  
Nir Emission ◽  
Near Infrared Region

Lanthanides (LnIII) are well known for their characteristic emission in the Near-Infrared Region (NIR). However, direct excitation of lanthanides is not feasible as described by Laporte’s parity selection rule. Here,...

Sign in / Sign up

Export Citation Format

Share Document