Reaction vessel- and concentration-induced supramolecular isomerism in layered lanthanide-organic frameworksElectronic supplementary information (ESI) available: The detailed synthesis procedure, IR and powder XRD patterns, TGA figures and crystal data for complexes 1–3. CCDC reference numbers 832546for 1, 832547for 2and 832548for 3, respectively. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c1ce05839h

The self-assembly of the flexibly bonded dicarboxylate ligand, 2,2′-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene)bis(sulfanediyl) dibenzoic acid (H2L1), with La(NO3)3·6H2O resulted in the formation of three layered coordination polymers. Interestingly, three complexes are supramolecular isomers and their structures are highly influenced by the concentration of the starting reagents and the reaction vessel, such as a glass tube or a Teflon-lined steel bomb. [ABSTRACT FROM AUTHOR]