Conformationally switchable non-cyclic tetrapyrrole receptors: synthesis of tetrakis(1H-pyrrole-2-carbaldehyde) derivatives and their anion binding properties.

  title={Conformationally switchable non-cyclic tetrapyrrole receptors: synthesis of tetrakis(1H-pyrrole-2-carbaldehyde) derivatives and their anion binding properties.},
  author={Murat K. Deliomeroglu and Vincent M Lynch and Jonathan L. Sessler},
  journal={Chemical communications},
  volume={50 80},
A series of tetrakis(1H-pyrrole-2-carbaldehyde) receptors (2, 4, and 6) were synthesized in two steps from commercially available starting materials. The anion binding properties of these receptors can be tuned through electronic switching to stabilize a conformation displaying high affinity for the dihydrogenphosphate and pyrophosphate anions (as the tetrabutylammonium salts) in chloroform. 
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