Self-assembly of a Pd-based molecular bowl as anion receptor featured by multiple C H···anion hydrogen bonds

[M8L4]8+-Type Squares Self-Assembled by Dipalladium Corners and Bridging Aromatic Dipyrazole Ligands for Iodine Capture

“…The intricate 2D structure comprises infinite 1D chains (Figure a), which are formed with the assistance of intermolecular hydrogen bonding between the CH groups of the adjacent chains and the F atoms located along the ab plane, as shown in Figure b (F(7), F(8), H(11), F(12), H(20), H(77), and H(78) atoms). The weak intermolecular interactions of the other planes are shown in the Supporting Information. , …”

“…The weak intermolecular interactions of the other planes are shown in the Supporting Information. 83,84 Iodine Capture Performance. Based on the considerable damage to human health caused by iodine and the large cavities of the metallamacrocycles, we therefore evaluated their iodine adsorption performances in organic solvents and aqueous solutions.…”

Tuning the Size and Geometry of Pd(II)-Based Metallacalixarenes by Varying the N-Containing Ligands: Synthesis, Structure, and Sensing Properties

“…They are easily obtained in the reaction of cis-protected metal fragments, such as palladium­(II) [Pd­(II)] complexes, with appropriate N-heterocyclic compounds as ligands. Pd­(II) has been one of the most favored metal centers for self-assembly of metallacalixarenes because of its structural advantage of the square-planar coordination. − Various Pd­(II) fragments are utilized to construct metal–organic structures with a range of topologies upon complexation with ligands. − When a cis-protected Pd­(II) compound [Pd­(N^N)] (M) is treated with a suitable nonchelating or chelating bidentate ligand L, an M x L y -type self-assembled complex with the formula [Pd x (N^N) x ( L ) y ]­(monoanion) z could be obtained, with nitrate as the monoanion, hexafluorophosphate or perchlorate as counteranions, and “N^N” as the cis-protecting unit using a chelating bidentate compound with or without a π-cloud as the second ligand, including 2,2′-bipyridine (bpy), 1,10-phenanthroline (phen), 2,2′-dimethyl-bipyridine (dmbpy), ethylenediamine (en), and tetramethylethylenediamine (tmen). ,− Nitrogen donor compounds are most widely used as a nonchelating bidentate ligand L to construct complexes such as pyridine/pyrimidine in neutral formulas and imidazole/pyrazole in neutral or anionic formulas. − …”