Synthesis and spectral studies of lanthanides coordination compounds based on N-(diphenylphosphoryl)benzamide. The structure of N-(diphenylphosphoryl)benzamide

摘要

N-(diphenylphosphoryl)benzamide (HL), its sodium salt and new lanthanide coordination compounds of general formula LnL_3.i-PrOH, LnL_3Dipy LnL_3Phen (Ln = La, Nd, Eu, Gd, Tb; Dipy = a,a' - dipyridyl; Phen = 1,10-phenanthroline) have been synthesized. The crystal structure of HL was solved. The polymeric frame of N-(diphenylphosphoryl)benzamide crystal structure was established. The infinite chains of molecules are formed by the NAH...ó type hydrogen bonds linking neighboring molecules. The synthesized coordination compounds were studied by means of thermo gravimetric analysis, IR, NMR ~1H, ~(31)P, absorption and luminescence spectroscopy at 298 and 77 K. The obtained Eu (III) and Tb (III) complexes luminescence characteristics dependence on triplet states of ligands in complexes is discussed.