SEM micrographs were performed on a Zeiss VEVO 50, EDS analyses with an IXRF Systems 500. XRD patterns were collected in a RIGAKU diffractometer at 30 kV and 20 mA using CuKα radiation. DTA was carried out using a Perkin Elmer 1700 analyzer. The infrared spectra of solid samples were recorded as KBr pellets in the 4000–400 cm−1 range on a Varian 640 spectrometer operating in the FT mode. Esters contents and yields were determined with a GC/MS-QP 2010/AOC 5000 AUTO INJECTOR/Shimadzu Gas Chromatograph/Mass Spectrometer equipped with a 30 m Agilent J&W GC DB-5 MS column. Direct insertion spectra were measured at 70 eV. Quantitative analyses were performed on a Shimadzu GC-2010 gas chromatograph equipped with a flame ionization detector. 1H- and 13C-NMR spectra were recorded on Bruker Avance 400 and Avance 500 Spectrometers. All reactions were performed under atmospheric pressure and were monitored by TLC with Silica Gel 60 F 254 on aluminum; the chromatograms were visualized by UV or using the ethanolic vanillin developing agent. Silica gel (Merck 230–400 mesh) was used for purification of products by flash column chromatography using hexane and ethyl acetate (9:1) as eluent.
640 spectrometer
Manufactured by Agilent Technologies
The 640 Spectrometer is a laboratory instrument designed for spectroscopic analysis. It is capable of measuring the absorption or emission spectra of samples across a range of wavelengths. The core function of the 640 Spectrometer is to provide precise and reliable spectral data for scientific research and analytical applications.
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3 protocols using 640 spectrometer
1
Comprehensive Analytical Characterization of Materials
2
FTIR Spectroscopy of Dried Samples
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FTIR spectra were determined using an FTIR Varian 640 Spectrometer using ATR mode. The samples were dried at 60 o C for 48 h before performing the measurement. The obtained spectrum had a resolution of 4 cm -1 and consisted of approximately 3500 points with an integration times of 60 s (1 s per scan). Spectra were scanned between 4000 and 500 cm -1 at ambient temperature. The number of scans for each sample was 64.
3
Electrochemical and Spectroscopic Characterization
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The electrochemical characterizations were performed by a BAS 100 B/W (electrochemical analyzer Bioanalytical System, West Lafayette, IN), while amperometric detection was carried out using a BAS LC-4C potentiostat. SPCE with CE (carbon) + RE (Silver) + WE (carbon) was purchased from Ital Sens IS C (Palmsens, Italy). According to the manufacturer the geometric area and Ø of WE are 7.07 mm 2 and 3 mm, respectively. UV-Vis characterization studies were performed using a UV-vis spectrophotometer model UV-1650 (Shimadzu, USA). The infrared spectroscopy evaluations were carried out by a Varian 640 Spectrometer. SEM images were obtained by LEO 1450VP.
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