3 years ago

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

A Four-Armed Unsymmetrical Cryptand: From Two Different Host–Guest Interactions to Responsive Supramolecular Polymer
Qiang Sun, Chenhao Yao, Leyong Wang, Juli Jiang, Jing Zhang, Yi Pan, Ming Cheng
By linking BMP32C10 and DB24C8 motifs together, a four-armed cryptand 1 is synthesized successfully, in which BMP32C10 motif can bind paraquat 2 while DB24C8 motif can complex dibenzylammonium salt 3 in spite of the electrostatic repulsion between guests 2 and 3. The base/acid-responsive supramolecular polymer is constructed further via two kinds of host–guest interactions between cryptand 1 and two homoditopic paraquat 4 and dibenzylammonium salt 5 similar to guests 2 and 3. A four-armed cryptand 1 containing BMP32C10 and DB24C8 motifs is synthesized, which can bind paraquat 2 and dibenzylammonium salt 3 via two kinds of interactions at the same time. The pH-responsive supramolecular polymer is constructed further among cryptand 1 and two homoditopic guests 4 and 5.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/marc.201700218

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