Bilayers, corrugated bilayers, and coordination polymers of p-sulfonatocalix[6]arene

Inorg Chem. 2004 Oct 4;43(20):6351-6. doi: 10.1021/ic0493595.

Abstract

Exploration into the host-guest supramolecular chemistry of p-sulfonatocalix[6]arene with pyridine N-oxide and 4,4'-dipyridine N,N'-dioxide has resulted in the characterization of three new structural motifs with the calixarene in the "up-down" double partial cone conformation. Two are hydrogen-bonded network structures formed with pyridine N-oxide and either nickel or lanthanide metal counterions (1 and 2, respectively). Complex 1 displays host-guest interactions between pyridine N-oxide and the calixarene in the presence of hexaaquanickel(II) counterions. Complex 2 demonstrates selective coordination modes for different lanthanides involving the calixarene and pyridine N-oxide. The third structure, 3, is a coordination polymer which is formed with 4,4'-dipyridine N,N'-dioxide molecules which span a hydrophilic layer and join lanthanide/p-sulfonatocalix[6]arene fragments. Although complexes 1-3 all have the calixarene in the "up-down" double partial cone conformation, 1 and 3 form bilayer arrangements within the extended structures while 2 forms a previously unseen corrugated bilayer arrangement.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calixarenes / chemical synthesis
  • Calixarenes / chemistry*
  • Crystallography, X-Ray
  • Models, Molecular
  • Molecular Structure
  • Phenols / chemical synthesis
  • Phenols / chemistry*
  • Polymers / chemical synthesis*
  • Pyridines / chemistry

Substances

  • Phenols
  • Polymers
  • Pyridines
  • calix(6)arene
  • Calixarenes