Solid-state photoluminescent studies of and 1-Yb•0.5MeCN at room temperature and 77 K were conducted with a Horiba iHR320 spectrometer configured for Visible and NIR measurements (NIR grating, 600 lines per mm, blazed 1000 nm; Visible grating, 1200 lines per mm, blazed 500 nm). The sample was excited with a 280 nm Thorlabs LED (M280L6) that was modulated at 183 Hz with a Thorlabs LED driver (DC2200). Sample emission was collected with a fused silica lens (numerical aperture 0.42, Thorlabs, LA4464); the collimated light was focused onto the spectrometer entrance slit with a second identical lens. Higher-order scattered light from the excitation LED was removed by placing an absorption filter in front of the spectrometer entrance (Kodak 87C longpass filter for NIR measurements; Corning 3-73 435 nm longpass filter for Visible measurements). Spectra were recorded by scanning the spectrometer and detecting the output light. NIR light was detected with a thermoelectric cooled Indium gallium arsenide (InGaAs) solid state detector (DSS-IGA020T, Electro-Optical Systems); Visible light was detected with a Hamamatsu R928 Photomultiplier Tube. The modulated signal was analysed with a E. G. and G. Princeton Applied Research lock-in amplifier (Model 5210). All spectra were collected in the solid-state, where samples were held between two quartz slides. The sample was illuminated from the front, with emission collected from the same side and directed into the spectrometer. Low temperature measurements (77K) employed an Optical Cryostat (Oxford Instruments, OptistatDN, Fused Silica windows) with custom built film holder.