Dual Visible and NIR Emission, Mechanoluminescence, and Magnetic Properties of PPh4[LnL4] Chelates with Diphenyl-N-Benzoylamidophosphate

The design, synthesis, and study of lanthanide coordination compounds with luminescent and magnetic properties attractive in modern technologies is still a pressing and challenging task. In the present work, a series of coordination compounds of tetrakis-carbacylamidophosphate PPh4[LnL4] (where HL = diphenyl-N-benzoylamidophosphate) with several lanthanide ions such as NdIII, SmIII, DyIII, and TmIII was prepared and studied by X-ray analysis and luminescence spectroscopy at 293 and 77 K, as well as by magnetic measurements. Coordination compounds are not isostructural, but the type of coordination is the same. All of them have intense sensitized emission. PPh4[SmL4], PPh4[DyL4], and PPh4[TmL4] chelates are characterized by dual visible and infrared emission and mechanoluminescence. In addition, PPh4[DyL4] has multifunctional properties such as Vis and NIR emissions, brilliant mechanoluminescence and single-ion molecular magnet (SIM) properties. This type of compound holds great promise in multifunctional magnetic radiation converters.