Inova 300 mhz

Analytical grade solvents and commercially available reagents were used as received unless otherwise stated. Chromatographic purifications were performed using 70-230 mesh silica gel. 1 H and 13 C NMR spectra were recorded on Varian Inova 300 MHz, Varian Mercury 400 MHz, Agilent 500 MHz or Inova 600 MHz spectrometers. Chemical shifts (δ) are reported in ppm relative to residual solvent signals for 1 H and 13 C NMR ( 1 H NMR: 7.26 ppm for CDCl 3 , 5.33 ppm for CD 2 Cl 2 ; 13 C NMR: 77.0 ppm for CDCl 3 , 53.84 ppm for CD 2 Cl 2 ). 13 C NMR spectra were acquired with the 1 H broadband decoupled mode. Coupling constants are given in Hz. The abbreviations used to indicate the multiplicity of signals are s, singlet; d, doublet; t, triplet; q, quartet; dd, double doublet; and m, multiplet. The high-resolution mass spectra (HRMS) were obtained with an ESI-QTOF (Agilent Technologies, model G6520A) instrument, and the m/z values are referred to as the monoisotopic mass. ESI-MS analyses were performed by direct injection of acetonitrile solutions of the compounds using a WATERS ZQ 4000 mass spectrometer.
The cyclometalated μ-dichloro-bridged iridium(III) precursor [Ir( ppy) 2 (µ-Cl)] 2 (Ir-dimer) was prepared following a reported procedure 33, 34 by refluxing the IrCl 3 •xH 2 O salt and the cyclo-metalating ligand Hppy = 2-phenylpyridine in a 2-ethoxyethanol/water mixture (3 : 1).