Gram Scale Synthesis of Benzophenanthroline and Its Blue Phosphorescent Platinum Complex

The design, synthesis, and characterization of 12-phenyl­benzo­[f]­[1,7]­phenanthroline, Bzp, is reported. Its use as a fluorine-free ligand for sky blue phosphorescence is demonstrated in a cyclometalated platinum complex, BzpPtDpm. BzpPtDpm phosphoresces at the same wavelength as its analogous 4,6-difluoro­phenyl­pyridine complex at both room temperature (466 nm) and 77 K (458 nm). Finally, production of a conformationally restricted derivative of BzpPtDpm with greatly increased quantum yield (46%) validates the versatility of the synthetic route.本文报道了12-苯基苯并[f][1,7]菲咯啉（12-phenylbenzo[f][1,7]phenanthroline，简称Bzp）的设计、合成与表征。将其作为无氟配体应用于天蓝色磷光的效果，在环金属化铂配合物BzpPtDpm中得到了验证。该配合物在室温（466 nm）与77 K（458 nm）下的磷光发射波长，与其类似物4,6-二氟苯基吡啶配合物完全一致。最后，通过制备构象受限的BzpPtDpm衍生物，其量子产率大幅提升至46%，验证了该合成路线的通用性。