Anion-directed genuine meso-helical supramolecular isomers of two 1D Ag(i) complexes based on arene-linked bis(pyrazolyl)methane ligandsElectronic supplementary information (ESI) available: Structural information, thermogravimetric analysis, spectroscopy details (Fig. S1-S3, Tables S1-S3). CCDC reference numbers 774545-774546. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c0ce00137f

Two genuine supramolecular isomers ( L p = p -[CH(pz) 2 ] 2 C 6 H 4 ), have been successfully obtained under similar solvothermal conditions by the reaction of arene-linked p -bis[bis(1-pyrazolyl)methyl]benzene ligand with AgNO 3. Both of the compounds are made of unusual meso -helical chains and present a three-dimensional (3D) supramolecular structure. Compounds 1 and 2 were characterized by elemental analyses, IR spectra, single-crystal X-ray diffraction and thermogravimetric (TG) analyses. The fluorescence property of them has also been studied. Two novel 1D genuine supramolecular isomers constructed of meso -helical chains based on the arene-linked bis(pyrazolyl)methane ligand have been successfully synthesized under the solvothermal conditions. The fluorescence property of them has also been studied.