scholarly journals Direct observation of the intermediate in an ultrafast isomerization

2019 ◽  
Vol 10 (1) ◽  
pp. 113-117 ◽  
Author(s):  
Tyler M. Porter ◽  
Jiaxi Wang ◽  
Yingmin Li ◽  
Bo Xiang ◽  
Catherine Salsman ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Direct Observation ◽  
Ruthenium Complex ◽  
Variable Temperature ◽  
Fourier Transform Infrared ◽  
Two Dimensional ◽  
2D Ir ◽  
Structural Isomerization

Using a combination of two-dimensional infrared (2D IR) and variable temperature Fourier transform infrared (FTIR) spectroscopies the rapid structural isomerization of a five-coordinate ruthenium complex is investigated.

Variable-Temperature Fourier Transform Infrared Spectroscopic Investigations of Poly(3-Hydroxyalkanoates) and Perturbation-Correlation Moving-Window Two-Dimensional Correlation Analysis. Part I: Study of Non-Annealed and Annealed Poly(3-Hydroxybutyrate) Homopolymer

2009 ◽  
Vol 63 (9) ◽  
pp. 1027-1033 ◽  
Author(s):  
Miriam Unger ◽  
Shigeaki Morita ◽  
Harumi Sato ◽  
Yukihiro Ozaki ◽  
Heinz W. Siesler
Keyword(s):  
Fourier Transform ◽  
Correlation Analysis ◽  
Crystalline State ◽  
Variable Temperature ◽  
Fourier Transform Infrared ◽  
Melting Behavior ◽  
Correlation Spectroscopy ◽  
Moving Window ◽  
Two Dimensional ◽  
Ft Ir

Generalized two-dimensional correlation spectroscopy (2DCOS) and perturbation-correlation moving-window two-dimensional (PCMW2D) correlation spectroscopy were applied to explore the melting behavior of non-annealed and annealed poly(3-hydroxybutyrate) (PHB) homopolymer as studied by variable-temperature Fourier transform infrared (FT-IR) spectroscopy. The absorption band of the C=O stretching vibration was employed to investigate the structural changes during the heating process (30–200 °C). Non-annealed PHB showed a recrystallization process in the temperature range 30–120 °C. In the asynchronous 2D correlation spectrum we clearly captured the existence of two components in the crystallinity-sensitive wing of the C=O stretching mode: a well-ordered crystalline state at lower wavenumbers (1718 cm−1) and a less ordered crystalline state at higher wavenumbers (1724 cm−1). These crystallinity-sensitive bands at 1718 and 1724 cm−1, which are not readily detectable in the one-dimensional (1D) FT-IR spectra, share asynchronous cross-peaks with bands at around 1737 and 1747 cm−1 assignable to the C=O stretching absorptions due to the amorphous components. In the case of the melting process of non-annealed PHB in the temperature range 120–200 °C, it is helpful to use the PCMW2D correlation analysis, which indicates the recrystallization between 40 and 110 °C by the shift of the C=O stretching band from 1726 cm−1 to 1722 cm−1 and the sharp change to the broad amorphous C=O stretching absorption at 1747 cm−1 at the melting temperature of PHB around 190 °C. For an annealed sample of PHB only the melting behavior was observed in the PCMW2D correlation analysis by the sharp transition from the crystalline to the amorphous C=O stretching band.

Real-time redox monitoring of a nitrosyl ruthenium complex acting as NO-donor agent in a single A549 cancer cell with multiplex Fourier-transform infrared microscopy

Nitric Oxide ◽  
2020 ◽  
Vol 96 ◽  
pp. 29-34
Author(s):  
Fernando Postalli Rodrigues ◽  
Lucyano J.A. Macedo ◽  
Leandro N.C. Máximo ◽  
Fernanda C.P.F. Sales ◽  
Roberto S. da Silva ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Real Time ◽  
Cancer Cell ◽  
Ruthenium Complex ◽  
Fourier Transform Infrared ◽  
Infrared Microscopy ◽  
No Donor

Two-Dimensional Fourier Transform Infrared-Visible and Infrared-Raman Spectroscopies

2015 ◽  
pp. 503-505 ◽  
Author(s):  
Trevor L. Courtney ◽  
Zachary W. Fox ◽  
Karla M. Slenkamp ◽  
Michael S. Lynch ◽  
Munira Khalil
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Two Dimensional
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