Cary 600 spectrometer

¹H NMR spectra were collected out using a Bruker DPX-300 (300 MHz) FT NMR system operating at 300 MHz. Fourier transform infrared spectra were recorded on a Cary 600 spectrometer equipped with a MCT-A (mercury cadmium telluride) detector with 5 mg samples. Elemental anlyses ware recorded on a Vario ELIII element analysis with 20 mg samples. PXRD data were carried out using a synchrotron radiation on the beam line 5A over the range of 2θ = 1.5–60.0° with a step size of 0.02° and 30 s per step at the Pohang Accelerator Laboratory (PAL), Pohang, Korea. BET data were recorded on a micrometrics ASAP 2010 equipment using N₂ gas at 77 K. TGA data were obtained under nitrogen atmosphere on a TGA Q50 anlayzer. FE-SEM was performed on a HITACHI S-4800 at 3 keV and 10 μA.

The electronic (UV–Vis) spectra of the neutral Mo₂ dimers [EE′–(ph)_n–EE′] were recorded on Shimadzu UV-3600 (UV–VIS–NIR) or Cary 600 spectrometer in the range of 300–800 nm. For the MV complexes [EE′–(ph)_n–EE′]⁺, to record the low-energy IVCT absorption, a Shimadzu IRAffinity-1s FTIR or Nicolet 6700 FTIR spectrophotometer was used. For those having the main part of the IVCT band extending to the IR region, the spectra were generated by combing the data obtained from the two instruments. All the spectroscopic measurements were conducted in DCM solution (5 × 10⁻⁴ mol L⁻¹) using quartz cell with light path length of 2 mm.

Fourier transform infrared spectra were obtained using a Cary 600 spectrometer equipped with a MCT-A (mercury cadmium telluride) detector with 5 mg samples in a powdered state.