Perkin elmer 2400 elemental analyzer

The ligand 1,4-di(1H-imidazol-4-yl)benzene (L) was prepared as previously described [33 (link)]. Other chemical reagents and solvents were purchased commercially and were used as received without further purification. Elemental analyses were performed using a Perkin-Elmer 2400 elemental analyzer (Perkin-Elmer, Inc., Billerica, MA, USA). The infrared spectrum was recorded on a Nicolet Fourier Transform IR (Nicolet Instrument Inc., Madison, WI, USA), and a Nicolet MAGNA-IR 500 spectrometer (Nicolet Instrument Inc., Madison, WI, USA) in the range of 500–4000 cm⁻¹ using the KBr disc technique. Thermogravimetric analyses (TGA) were performed on a computer-controlled Perkin-Elmer 7 Series/UNIX TGA7 analyzer (Perkin-Elmer, Inc., Billerica, MA, USA). Gas adsorption experiments were carried out on an Autosorb-iQ gas sorption instrument in Quantachrome Instruments U.S (Quantachrome, Delray Beach, FL, USA). The sample was activated by using the “outgas” function of the surface area analyzer (Quantachrome, Delray Beach, FL, USA) for 24 h at 160 °C. Photoluminescence spectra for the solid samples were recorded with a HORIBA FluoroMax-4 fluorescence spectrophotometer at room temperature. The decay lifetimes were measured with an FLS920P fluorescence spectrometer (Edinburgh Instruments, Edinburgh, UK) in the solid state at room temperature.

Commercially available compounds were used as obtained from suppliers (Molar Chemicals Ltd, Halásztelek, Hungary; Merck Ltd., Budapest, Hungary and VWR International Ltd., Debrecen, Hungary) while applied solvents were dried according to standard procedures. Optical rotations were measured in MeOH at 20 °C, with a Perkin-Elmer 341 polarimeter (PerkinElmer Inc., Shelton, CT, USA). Chromatographic separations and monitoring of reactions were carried out on Merck Kieselgel 60 (Merck Ltd., Budapest, Hungary). Elemental analyses for all prepared compounds were performed on a Perkin-Elmer 2400 Elemental Analyzer (PerkinElmer Inc., Waltham, MA, USA). GC measurements for direct separation of enantiomers was performed on a Chirasil-DEX CB column (2500 × 0.25 mm I.D.) on a Perkin-Elmer Autosystem XL GC consisting of a Flame Ionization Detector (Perkin-Elmer Corporation, Norwalk, CT, USA) and a Turbochrom Workstation data system (Perkin-Elmer Corp., Norwalk, CT, USA). Melting points were determined on a Kofler apparatus (Nagema, Dresden, Germany) and are uncorrected. ¹H and ¹³C NMR spectroscopic data were recorded at room temperature on a Bruker Avance DRX 400 MHz spectrometer (Bruker Corp., Billerica, MA, USA) in CDCl₃ or in DMSO.

All the reagents (Sigma-Aldrich Inc., Taipei, Taiwan) were purchased commercially and used without further purification. Elementary microanalyses (EA) (C, H and N) were performed using a Perkin-Elmer 2400 elemental analyzer (PerkinElmer, Taipei, Taiwan). FTIR spectra (500–4000 cm⁻¹) were recorded from KBr pellets with a Nicolet Fourier Transform IR, MAGNA-IR 500 spectrometer (ThermoFisherScientific, Waltham, MA, USA). Thermal analysis (TGA) was carried out using a Perkin-Elmer 7 Series/UNIX TGA7 analyzer (PerkinElmer, Taipei, Taiwan) under a nitrogen atmosphere in the temperature range of 25 °C–700 °C with a ramp rate of 5 °C/min.