Supramolecular Assemblies and Reversible De‐/ Rehydration in One‐Dimensional Dimethyltin Carboxylates

Abstract

The study presents the synthesis and structural aspects of a new family of dimethyltin carboxylates, [(Me2Sn)2(btec)(bipy)(H2O)] ⋅ 4H2O (1), [Me2Sn(btec)0.5(bipy)]2 ⋅ H2O (2), [Me2Sn(btec)0.5(bipy)] ⋅ 3H2O ⋅ 0.5bipy (3) and [Me2Sn(btec)0.5(phen)] (4) derived from 1,2,4,5‐benzenetetracarboxylic acid (H4btec). The structure in each case adopts a one‐dimensional motif featuring ditin macrocycles with 2,2'‐bipyridine (bipy) or 1,10‐phenanthroline (phen) acting as the chelating ligand. For 1, the lattice water molecules in association with the framework form infinite T4(0)A(1) water chains. The organic hydrate, bipy ⋅ 6H2O in 3 adopts a layered structure comprising T4(2)6(2) water tapes and trans‐bipy. Dehydration of 2 to 2 a results in crystal structure transformation from centrosymmetric P21/c (in 2) to chiral P212121 space group and reveals conformational changes in the ditin macrocycles from chair to boat form. The reversibility of this transformation has been supported by TGA, PXRD, and single‐crystal X‐ray studies.

Supramolecular Organic Nanowires of 2,6‐Naphthalene Dicarboxylic Acid Observed in the Lamellar Space of Zn3(PO4)4and Zn1.6Co1.4(PO4)4Host Lattices

“…A recent report by Shankar et. al., about another layered dimethyl tin carboxylate structure constructed from Bipy.6H 2 O in combination with water chains [6] . The nanometer scale interlayer space in 2D materials serves as a platform for constructing materials with new properties [7] .…”

“…al., about another layered dimethyl tin carboxylate structure constructed from Bipy.6H 2 O in combination with water chains. [6] The nanometer scale interlayer space in 2D materials serves as a platform for constructing materials with new properties. [7] A recent report suggested that the interlayer organic molecules within the layered lead halide perovskites played a significant role in modulating the optoelectronic properties of materials.…”