V 770 uv vis nir spectrometer

Transmission electron microscopy (TEM) images were recorded by a JEOL JEM-2100 operating at 200 kV. High-Resolution Transmission Electron Microscopy (HRTEM) images were collected by a JEOL-F200 and JEOL JEM-3010. Energy Dispersive X-ray Spectroscopy (EDS) measurement and mapping were performed using JEOL JEM-ARM200F. Scanning electron microscopy (SEM) images were recorded using Carl Zeiss SIGMA operating at 5 kV. X-ray diffraction (XRD) was conducted using Bruker-AXS New D8-Advance. X-ray photoelectron spectroscopy (XPS) measurements were performed using ThermoFisher Scientific K-alpha. Absorption and transmission spectra were collected with a JASCO V-770 UV-VIS-NIR spectrometer. Photoluminescence (PL) spectra were obtained using EDINBURGH FS5. The PLQY was measured using a fluorimeter equipped with an integrating sphere. Time-resolved photoluminescence decay data were collected using a HORIBA Fluorolog-3 with a single photon-counting photomultiplier tube (PMT) under a 374 nm pulsed laser diode.

Electrochemical and spectroelectrochemical measurements were recorded on a VSP Bio-Logic multichannel potentiostat. Compounds were dissolved in anhydrous and deaerated acetonitrile at ∼10⁻⁴ M with 0.1 M tetrabutylammonium hexafluorophosphate as the electrolyte. A platinum electrode was used as the working electrode and a platinum wire was used as the auxiliary electrode. The reference electrode was an Ag/Ag⁺ electrode. Spectroelectrochemical measurements were recorded using a commercially available platinum honeycomb working electrode on a ceramic support in a narrow optical path quartz cuvette using a miniature Ag/AgCl gel electrode as the reference electrode. Potential was controlled with the potentiostat. The resulting spectroscopic changes were measured with a Jasco V-770 UV-Vis-NIR spectrometer.