Supramolecular architecture of metal-lustrous inclusion crystals based on aromatic CH–π interaction: versatile inclusion of 1-(p-ethoxyphenyl)-2-(2-thienyl)-5-[5-(tricyanoethenyl)-2-thienyl]pyrrole host with various electron-rich aromatic guest molecules
1-(p-Ethoxyphenyl)-2-(2-thienyl)-5-[5-(tricyanoethenyl)-2-thienyl]pyrrole, a novel π-conjugated organic compound, shows particularly stronger affinities to various electron-rich aromatic guest molecules to form 2:1 inclusioncomplexes with gold- or bronze-like metallic luster. All of the complexes crystallize with the same so-called herringbone packing motif in which the π-system of the guest is sandwiched