“…Syntheses: Compounds 1-3 were purchased commercially (KatChem) and purified by repeated sublimations, whereas 4, [68] 5, [69] 6, [68] 7, [69] 8, [70] 9, [71] 10, [71] 11, [72] 12, [73] 13, [74] 14, [74] 15, [72] 16 [75] and 17 [74] were prepared according to literature procedures. 13 Photophysical Measurements: Absorption spectra were measured from 200 to 600 nm (Δλ = 0.5 nm) with a Shimadzu absorption spectrometer.…”