IR spectra of ethanol, ethanol solutions of PC and its mixture with abietic acid and TMZ were recorded, using a Bruker Vector-27 FTIR spectrometer in the 400–4000 cm−1 range (optical resolution 4 cm−1). The neat PC sample as well as solutions were prepared between CaF2 plates. The ethanol solutions were prepared in concentrations: PC 10% w/w, PC:abietic acid = 1:1.
Vector 27 ftir spectrometer
Manufactured by Bruker
Sourced in United Kingdom
The Vector-27 FTIR spectrometer is a Fourier Transform Infrared (FTIR) instrument designed for high-performance spectroscopic analysis. It is capable of capturing infrared spectra of various samples, providing detailed information about their molecular composition and structure.
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5 protocols using vector 27 ftir spectrometer
1
FTIR Analysis of Ethanol, PC, and Mixtures
2
Thermal and Structural Analysis of Compounds
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The thermogravimetric analysis (TGA) was carried out on air using a Netzsch STA 409 PC Luxx thermal analyzer and heating rate of 5°/min in the temperature region from 20 up to 1200 °C. IR spectra of solid compounds have been registered using a Bruker Vector-27 FTIR spectrometer in the 400–4000 cm−1 range (optical resolution 4 cm−1); the samples were prepared as nujol mulls. Powder X-ray diffraction data were collected on an STOE STADI P diffractometer with Cu-Kα1 radiation (λ = 1.5405 Å).
3
FTIR Spectroscopy of Material Samples
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IR spectra were obtained using a Bruker Vector 27 FTIR spectrometer with a Helios ATR attachment containing a diamond crystal (≈250 μm × 250 μm sampling area) (Bruker Optics Ltd., Coventry, UK). Spectra were acquired from 10 different locations across each specimen with a new background taken for every new sample. The ATR crystal was cleaned with distilled water and dried with dry tissue paper before the acquisition of spectral background. The spectral resolution was 8 cm−1 giving data spacing of 4 cm−1. Spectra were co-added for 32 scans; these were converted into absorbance by Bruker OPUS software (Fig. 1E ).
4
Thermal, Spectral, and Structural Analysis
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The thermogravimetric analysis (TGA) was carried out on air using an Analysis Netzsch STA 409 PC Luxx (Netzsch-Gerätebau GmbH, Selb, Germany), with a heating rate of 5°/min in the temperature region from 20 up to 1200 °C. IR spectra of solid compounds have been registered using Vector-27 FTIR spectrometer (Bruker, Ettlingen, Germany) in the 400–4000 cm−1 range (optical resolution 4 cm−1); the samples were prepared as nujol mulls. Powder X-ray diffraction data were collected on a STOE Stadi P diffractometer (STOE & Cie GmbH, Darmstadt, Germany) with Cu-Kα1 radiation (λ = 1.5405 Å). CCDC 2258503 and 2258504 contain the supplementary crystallographic data for this paper.
5
ATR-FTIR Spectroscopy of Tissue Samples
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IR spectra were obtained using a Bruker Vector 27 FTIR spectrometer with Helios ATR attachment containing a diamond crystal (Bruker Optics Ltd., Coventry, UK). Data acquired for each experimental condition (i.e., each sample slide) consisted of 10 spectra, each from a random area of the tissue slice under interrogation, using an FTIR imaging system coded for 32 scans per spectra and 3.84 cm -1 spectral resolution. The ATR crystal was cleaned with dH 2 O, dried thoroughly and a new background spectrum taken prior to analysis of a new sample. Raw spectra were acquired in the 4000 cm -1 -400 cm -1 range. Spectra in the region of interest (1800 -900 cm -1 ) were selected and pre-processed (rubberband baseline corrected and normalized to Amide I peak) to account and correct for noise, sloping baseline effects, differences in sample thickness or concentration.
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