6520 accurate mass q tof spectrometer

Elemental analyses were performed by the Campbell Microanalytical Laboratory, Chemistry Department, University of Otago, New Zealand. High resolution mass spectra (HR-MS) were performed on an Agilent 6520 Accurate-Mass Q-TOF spectrometer. Thermogravimetric analyses were performed on a Mettler Toledo thermal analyzer using a ramp rate of 7 °C min^–1 up to a maximum temperature of 700 °C. Ultraviolet-visible (UV-Vis) absorption spectra were recorded on an Agilent Cary 60 UV-Vis spectrophotometer in the range 220–1000 nm. Near infra-red (NIR) absorption spectra were recorded on a PerkinElmer Lambda 1050 UV/Vis/NIR spectrophotometer in the range 800–1330 nm. Electronic absorption spectra are discussed in the ESI (Fig. S13, Table S4†). Infrared spectra (KBr disk) were recorded on a Bruker Tensor 27 FTIR spectrometer. Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) was performed on a PerkinElmer Optima 4300 DV Optical Emission Spectrometer. Wavelengths chosen for analysis were 228.616 nm for Co and 206.200 nm for Zn, with five replicate measurements performed at each wavelength. The sample (3.0 mg) was digested in 1 mL reverse aqua regia and diluted with water prior to analysis.