Synthesis, Characterization and Photoluminescence of Lanthanide Metal‐organic Frameworks, Constructed from Triangular 4,4′,4″‐s‐triazine‐1,3,5‐triyl‐<i>p</i>‐aminobenzoate Ligands

Abstract

Abstract Eight isomorphous metal‐organic frameworks: [Ln 2 (TATAB) 2 (H 2 O)(DMA) 6 ]·5H 2 O (Ln = Sm ( 1 ), Eu ( 2 ), Gd ( 3 ), Tb ( 4 ), Dy ( 5 ), Er ( 6 ), Tm ( 7 ), Yb ( 8 )); TATAB = 4,4′,4″‐s‐triazine‐1,3,5‐triyl‐ p ‐aminobenzoate, DMA = N,N‐dimethylacetamide), were synthesized by the self‐assembly of lanthanide ions, TATAB, DMA and H 2 O. Single‐crystal X‐ray crystallography reveals they are three dimensional frameworks with 2‐fold interpenetration. Solid‐state photoluminescence studies indicate ligand‐to‐metal energy transfer is more efficient for compounds 2 and 4 which exhibit intense characteristic lanthanide emissions at room temperature.