The static Raman measurements of the molecular structures of catalysts were determined on a XploRA confocal spectrometer (Jobin Yvon, Horiba Gr, France). The Raman scattering was excited by an external-cavity diode (785 nm) and coupled with a 50 × Olympus microscope objective (Olympus, 0.50 Numerical Aperture). The power of the laser was equal to 9 mW. A 1200 lines per mm diffraction grating places prior to a multichannel charge-coupled device device (1024 × 256 pixels) was used to collect spectra in a resolution of 3 cm−1 with two accumulations at a 10 s acquisition time.
Xplora confocal spectrometer
Manufactured by Horiba
Sourced in France
The XploRA confocal spectrometer is a versatile laboratory instrument designed for high-resolution spectroscopy. It features a confocal optical system that allows for precise spatial and spectral analysis of samples. The core function of the XploRA is to provide users with detailed spectroscopic data from a variety of materials and samples.
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Lab products found in correlation
3 protocols using xplora confocal spectrometer
1
Raman Spectroscopy of Catalyst Structures
2
Micro-Raman Spectroscopy of Dried Samples
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Micro-Raman spectroscopy was performed directly on samples that were left to dry in a glass substrate. The apparatus is an XploRA confocal spectrometer (Horiba-Jobin Yvon, France), which was operated at a wavelength of 785 nm, using a 100× magnification objective with a pinhole of 300 µm and an entrance slit of 100 µm. The scattered light from the sample was then collected by the same objective and dispersed by a 1200 lines/mm grating onto an aircooled CCD detector iDus (Andor Technology Ltd., Belfast, UK). The analysis was performed in the 100-2000 cm -1 range and the spectral deconvolution was made with the Spectral ID software from Horiba using its built-in database as well as with other published Raman spectra.
3
Polymer Molar Masses via SEC-Raman
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Polymer molar masses were determined by size exclusion chromatography (SEC) using tetrahydrofuran (THF with 250 ppm of BHT as inhibitor) as the eluent. Measurements in THF were performed on a PL GPC 50 from Agilent equipped with RI and UV detector. The separation was achieved on three Tosoh TSK HXL gel columns (300 × 7.5 mm) G4000, G3000 and G2000 with an exclusion limits from 200 to 400 000 Da, at flow rate of 1 mL min−1. The injected volume was 20 μL. Columns' temperature was held at 40 °C.
The Raman measurements were performed using a Jobin-Yvon Horiba XploRA confocal spectrometer with a resolution of 4.3 cm−1 in the spectral range 900–3100 cm−1. The laser source is a laser diode giving access to two laser wavelengths with a maximum power of 45 mW. Our work was carried out using an incident wavelength of λ = 785 nm and the laser beam power was fixed at 100% of the maximum power. To improve the signal-to-noise ratio, each spectrum was the result of 2 accumulated spectra with an acquisition time of 30 seconds for each spectrum.
The Raman measurements were performed using a Jobin-Yvon Horiba XploRA confocal spectrometer with a resolution of 4.3 cm−1 in the spectral range 900–3100 cm−1. The laser source is a laser diode giving access to two laser wavelengths with a maximum power of 45 mW. Our work was carried out using an incident wavelength of λ = 785 nm and the laser beam power was fixed at 100% of the maximum power. To improve the signal-to-noise ratio, each spectrum was the result of 2 accumulated spectra with an acquisition time of 30 seconds for each spectrum.
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