Deep-red phosphorescent organic-inorganic hybrid Mn(II) complexes based on 2-(diphenylphosphoryl)-N,N-diethylacetamide ligand

Two unprecedented organic-inorganic hybrid complexes, [Mn(L)(3)]MnCl4 (1) and [Mn(L)(3)]MnBr4 (2), have been synthesized in 88-92% yields via reaction of Mn(II) halides with Ph-2 P(0)CH2 C(O)NEt2 (L) in a 3:2 M ratio. X-ray diffraction analysis of 2 reveals that the metal ion of the [Mn(L)(3)](2+ )cation has an octahedral geometry, while the [MnBr4] (2-) anion contains tetrahedrally coordinated Mn(II). At ambient temperature, the solid complexes 1 and 2 exhibit bright deep-red phosphorescence (lambda(em)(max) = 660 and 670 nm) with the lifetimes of 3-3.7 ms and photoluminescence quantum yields of 6% and 27%, respectively. (C) 2018 Elsevier Ltd. All rights reserved.