Structures and photophysical properties of copper(I) complexes bearing 1,10-phenanthroline and 1,3-bis(diphenylphosphino)propane

This is the authors' abstract. We don't add key points for this paper.

In this work, five [Cu(dppp)(phen)]X complexes (X=BF4 (1), SO3CF3 (2), NO3 (3), SCN (4), I (5)) have been synthesized from 1,10-phenanthroline (phen) and 1,3-bis(diphenylphosphino)propane (dppp) ligands, which show strong phosphorescence between 560–600 nm in the solid state at room temperature. Complexes 1–5 show a broad solid state emission in the green region of the spectrum. As commendable emitter, complex 5 exhibits extraordinary quantum yield (Φp) as high as 18% with lifetime (τp) of 10.1–11.2 μs at room temperature. Time-dependent density functional theory calculation (TD-DFT) was performed on complexes 1~5 to rationalize their experimental absorption and emission spectra. Complex 2 displays a favorable π-π stacking and can be simplified as two-dimensional topology.