The IR spectra of 6 , 8 , 9 , 10 , 11 , 14 , 16 , 17 , 19 , 44 , and 45 and of their deuterated analogs were recorded in the 4000–400 cm−1 region with a spectral resolution of 2 cm−1 by averaging the results of 10 scans on a PerkinElmer Spectrum 2000 FTIR spectrophotometer (Figures S1–S11 ). The compounds were measured in KBr tablets and when possible also in CCl4 solutions. The CCl4 solutions were dried with Na2SO4 to remove traces of water from the samples. An example of the recorded spectra is shown in Figure 1 , which displays the absorbance curves for normal and deuterated (Z)-ethyl 3-(methylamino)but-2-enoate (17 ) in the range 3800 to 900 cm−1. NMR spectra were recorded on Bruker Ultrashield Plus 500 MHz and Bruker Avance 3 spectrometers using CDCl3 as a solvent. For details and spectra, see Figure S21 .
Spectrum 2000 ftir spectrophotometer
Manufactured by PerkinElmer
Sourced in United States
The Spectrum 2000 FTIR spectrophotometer is a laboratory instrument designed for infrared spectroscopy analysis. It utilizes Fourier Transform Infrared (FTIR) technology to measure the absorption of infrared light by a sample, providing information about the molecular composition and structure of the sample.
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5 protocols using spectrum 2000 ftir spectrophotometer
1
Spectroscopic Analysis of Deuterated Compounds
2
FTIR Spectroscopy of Liquid Samples
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A Perkin-Elmer Spectrum 2000 FTIR spectrophotometer (Norwalk, CT, USA) equipped with a temperature stabilized deuterated triglycine sulfate detector, a KBr–Ge coated beam splitter, and a globar IR source was employed for FTIR spectra acquisition. A Wilmad Labglass FTIR liquid transmission cell (Buena, NJ, USA) was used for sampling. Its circular configuration was a general purpose liquid transmission cell. It involved ZnSe windows (32 mm diameter, 3 mm thick) and an appropriate PTFE spacer of 0.05 mm optical path length. The sample was introduced by filling ports using a 3 mL syringe.
3
FT-IR Spectroscopy of Thin Film Samples
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IR spectroscopy was performed using a PerkinElmer Spectrum 2000 FT-IR spectrophotometer. Spectra were recorded as a thin film between KRS-5 plates, in the range 400–4000 cm−1, and were accumulated for 32 scans at a resolution of 4 cm−1. The spectra were baseline corrected and processed using the available software.
4
Characterization of Functional Materials
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All chemicals were commercial products and used without further purification. IR spectra were recorded on a Perkin-Elmer Spectrum–2000 FTIR spectrophotometer (4000–400 cm−1) from powdered samples spread on KBr plates. Optical diffuse reflectance spectra were measured on a Perkin-Elmer lambda 900 UV/VIS spectrophotometer equipped with an integrating sphere at 293 K, and BaSO4 plates were used as a reference. Powder XRD patterns were obtained using a Philips X’Pert-MPD diffractometer with CuKα radiation (λ = 1.54056 Ǻ). High-resolution scanning electron microscopy (HR-SEM) measurements of the surface morphologies of films were executed on a Verios G4 UC instrument.19 (link),20 (link)
5
Polymer Characterization by GPC, NMR, and FT-IR
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Gel permeation chromatography (GPC) was conducted on a Waters GPC System (Shimadzu, Japan) equipped with two Phenogel columns (103 and 105 Å) (size: 300 × 7.80 mm) in series and a refractive index detector. HPLC grade THF was used as an eluent at a flow rate of 1 mL/min at 40 °C. Poly(methyl methacrylate) standards were used to generate a calibration curve.
1H and 13C nuclear magnetic resonance (NMR) spectra were obtained using a 500-MHz NMR spectrometer (JEOL, Japan) at room temperature. The chemical shift was referenced to the solvent peak of CDCl3 at 7.3 ppm.
Fourier transform infrared (FT-IR) spectra were collected using a Spectrum 2000 FT-IR spectrophotometer (PerkinElmer, USA) at room temperature. The copolymers were mixed with KBr and tableted, undergoing 32 scans in the wavenumber range of 4000–400 cm−1 at a resolution of 4 cm−1.
1H and 13C nuclear magnetic resonance (NMR) spectra were obtained using a 500-MHz NMR spectrometer (JEOL, Japan) at room temperature. The chemical shift was referenced to the solvent peak of CDCl3 at 7.3 ppm.
Fourier transform infrared (FT-IR) spectra were collected using a Spectrum 2000 FT-IR spectrophotometer (PerkinElmer, USA) at room temperature. The copolymers were mixed with KBr and tableted, undergoing 32 scans in the wavenumber range of 4000–400 cm−1 at a resolution of 4 cm−1.
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