Platinum art tensor 2 ft ir spectrometer

All the reagents and solvents were commercially available without any further purification. All the analytes were analytical grade and dissolved in dichloromethane. 4-tert-Butylcalix[6]arene was purchased from Sun Chemical Technology Co. Ltd (Shanghai, China). Untreated fused-silica capillary tubing (0.25 mm, i.d.) was purchased from Yongnian Ruifeng Chromatogram Apparatus Co., Ltd. (Hebei, China). The commercial capillary column HP-5 (10 m × 0.25 mm, i.d., 0.25 μm film thickness, 5% phenyl 95% dimethyl polysiloxane) was purchased from Agilent Technologies and used as the reference column.
An Agilent 7890A gas chromatograph equipped with a split/splitless injector, a flame ionization detector (FID) and an autosampler was used for GC separations. All the separations were performed under the following GC conditions: nitrogen of high purity (99.999%) as carrier gas, injection port at 250 °C, split ratio at 80 : 1, FID detector at 300 °C. Oven temperature programs for the GC separations were individually provided in the figure captions. ¹H NMR spectra were recorded on a Bruker Biospin 400 MHz instrument using TMS as the internal standard. All chemical shifts were reported in ppm. IR spectra were recorded on a Bruker Platinum ART Tensor II FT-IR spectrometer. MALDI-TOF-MS was recorded on a Bruker BIFLEX III mass spectrometer.

All the reagents and solvents employed were commercially available and were used as received without further purification. All the analytes were of analytical grade and dissolved in dichloromethane. Untreated fused-silica capillary tubing (0.25 mm, i.d.) was purchased from Yongnian Ruifeng Chromatogram Apparatus Co., Ltd. (Hebei, China). The commercial capillary column DB-1701 (30 m × 0.25 mm, i.d., 0.25 μm film thickness, 14% cyanopropylphenyl 86% dimethyl polysiloxane) was purchased from Agilent Technologies.
An Agilent 7890A gas chromatograph equipped with a split/splitless injector, a flame ionization detector (FID) and an autosampler was used for GC separations. All the separations were performed under the following GC conditions: nitrogen of high purity (99.999%) as carrier gas, injection port at 250 °C, split ratio at 60 : 1, FID detector at 250 °C. Oven temperature programs for the GC separations were individually provided in their figure captions. ¹H NMR spectra were recorded on a Bruker Biospin 400 MHz instrument using TMS as the internal standard. IR spectra were recorded on a Bruker Platinum ART Tensor II FT-IR spectrometer.