2/1/2024 0 Comments Crystalmaker crystal file jadePublication Date: Research Org.: Energy Frontier Research Centers (EFRC) (United States). Cardiff Univ., Wales (United Kingdom).George Washington Univ., Washington, DC (United States).Further, direct current magnetic susceptibility measurements were carried out for complexes 5 (Dy 3+) and 7 (Er 3+), and two slow magnetic relaxation processes were characterized using alternating current magnetic susceptibility measurements more ยป for 5. Additionally, solid-state visible and near-IR photoluminescence and luminescent lifetime data were collected for complexes 1 (Sm 3+), 2 (Eu 3+), 4 (Tb 3+), 5 (Dy 3+), 6 (Ho 3+), 7 (Er 3+), and 9 (Yb 3+) and characteristic emission was observed for all complexes except 6. Direct comparison of means of supramolecular assembly for 1-10 with isostructural Ln-pchlorobenzoic acid-1,10-phenathroline analogues verifies that increasing the number of halogens at the periphery of a tecton is one route that increases the frequency of halogen bonding interactions. Delineation of criteria for promoting assembly via halogen based interactions was introduced previously and is refined herein based on the characterization of complexes 1-10 via single crystal X-ray diffraction. We have developed a system wherein some control can be exercised over supramolecular assembly and, as part of continued efforts to improve this process we have generated a family of ten new lanthanide (Ln = Sm 3+-Lu 3+)-2,4,6-trichlorobenzoic acid-1,10- phenanthroline molecular complexes. Promotion of a synthon of choice for the non-covalent assembly of lanthanide tectons represents both a noteworthy challenge and opportunity within Ln(III) hybrid materials.
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