A Four‐Armed Unsymmetrical Cryptand: From Two Different Host–Guest Interactions to Responsive Supramolecular Polymer.

Abstract: By linking BMP32C10 and DB24C8 motifs together, a four‐armed cryptand <bold>1</bold> is synthesized successfully, in which BMP32C10 motif can bind paraquat <bold>2</bold> while DB24C8 motif can complex dibenzylammonium salt <bold>3</bold> in spite of the electrostatic repulsion between guests <bold>2</bold> and <bold>3</bold>. The base/acid‐responsive supramolecular polymer is constructed further via two kinds of host–guest interactions between cryptand <bold>1</bold> and two homoditopic paraquat <bold>4</bold> and dibenzylammonium salt <bold>5</bold> similar to guests <bold>2</bold> and <bold>3</bold>. [ABSTRACT FROM AUTHOR]