Fticr ms spectrometer

All the reagents were of analytical grade and used without further purification. Melting points were determined on a Beijing Taike melting point apparatus (X-4) (Taike, Beijing, China) and were uncorrected. IR spectra were obtained on a Bruker ALPHA-T spectrometer (BRUKER Inc., Beijing, China). ¹H NMR and ¹³C NMR spectra were recorded on a Bruker AV400 spectrometer (BRUKER Inc., Beijing, China) with CDCl₃ (Energy Chemical., Shanghai, China) as the solvent and TMS (Energy Chemical., Shanghai, China) as the internal standard. HRMS spectra were recorded on an FTICR-MS spectrometer (BRUKER Inc.). X-ray diffraction data were recorded on a BRUKER D8 VENTURE X-diffractometer (BRUKER Inc.) with Mo Kα radiation (λ = 0.71073 Å) at 273(2) K.

Maize seeds (Dongnong 259) were provided by Northeast Agricultural University college of agriculture. Fomesafen was provided by Jiangsu Fengshan Group Co., Ltd., the active ingredient content of 15% (m/m). The tested soil was Mollisols-cryolls clay loam type and collected from the Northeast Agricultural University Horticulture Station with a pH of 7.37. All the chemical reagents (Energy Chemical, Aladdin, China) were commercially available and used without further purification. Solvents were dried using standard methods. Thin-layer silica gel chromatography (TLC) (Qingdao Haiyang Chemical Co., Ltd., Qingdao, China) was used for analysis. The ¹H-NMR and ¹³C-NMR spectra were recorded on a Bruker AV-300 spectrometer (Bruker Inc., Beijing, China) in CDCl₃, internal standard TMS. High-resolution mass spectrometry (HRMS) data were recorded on a FTICR-MS spectrometer (Bruker Inc., Beijing, China). Melting points were measured on a X-4 equipment (Beijing Taike Inc., Beijing, China) and were uncorrected. X-ray diffraction data were collected on a D8 VENTURE X-diffractometer (Bruker Inc., Beijing, China).