No abstract

We report the remarkable ability of 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) compounds 2 with appended olefin amide arms to self-template the formation of interlocked [2]catenane structures 3 in up to 50 % yield when subjected to olefin ring-closing metathesis in CH2 Cl2 . X-ray diffraction crystallography enabled the structural characterization of both the [2]catenane 3 a and the non-interlocked macrocycle 4 a. These [2]catenanes showed selective triazolyl hydrogen-bonding interactions with the tetrahedral phosphate anion when screened against a range of ions; 3 a,b are the first examples of selective [2]catenane hosts for phosphate.

Tripodal N-methylated(1,3,5-benzene-tricarboxamide)-tris(phenylurea) BTA ligands, possessing urea functionalities in the meta position, are able to form extended self-assembly 2D networks via hydrogen bonding templated by sulfate (SO 4 2À ). Studies in solution and in the solid state, as well as scanning electron microscopy (SEM) on the self-assembly properties of the ligands showed that the convergence also leads to the formation of hierarchical structures, including porous films and spherical nano-sized particles, with the morphological outcome being highly solvent dependent.

We report the remarkable ability of 2,6-bis(1,2,3triazol-4-yl)pyridine (btp)compounds 2 with appended olefin amide arms to self-template the formation of interlocked [2]catenane structures 3 in up to 50 %yield when subjected to olefin ring-closing metathesis in CH 2 Cl 2 .X -ray diffraction crystallography enabled the structural characterization of both the [2]catenane 3a and the non-interlocked macrocycle 4a. These [2]catenanes showed selective triazolyl hydrogen-bonding interactions with the tetrahedral phosphate anion when screened against arange of ions; 3a,b are the first examples of selective [2]catenane hosts for phosphate.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under http://dx.