Standard Article

Podands

Molecular Recognition

  1. Adam N. Swinburne,
  2. Jonathan W. Steed

Published Online: 15 MAR 2012

DOI: 10.1002/9780470661345.smc058

Supramolecular Chemistry: From Molecules to Nanomaterials

Supramolecular Chemistry: From Molecules to Nanomaterials

How to Cite

Swinburne, A. N. and Steed, J. W. 2012. Podands. Supramolecular Chemistry: From Molecules to Nanomaterials. .

Author Information

  1. Durham University, Durham, UK

Publication History

  1. Published Online: 15 MAR 2012

Abstract

The term podand, originally applied to alkali metal cation-binding ligands with two or more pendant polyether arms, has expanded in usage and concept to encompass a vast range of cation- and anion-binding receptors as well as hosts for molecular guests based on a multibinding-site, acyclic structure. The multiarmed podands lead naturally into the key concept of multivalency and they are the conceptual precursors of dendrimers. This chapter covers the core concepts behind classical alkali metal cation-binding podands and surveys the basics of a range of cation-binding podands as well as highlights the huge diversity of anion-binding podands that has arisen in recent years. A flavor of the state of the art and future direction of podands for molecular guests is also noted.

Keywords:

  • multivalent;
  • multidentate;
  • host–guest;
  • alkali metal cation;
  • anion;
  • receptor;
  • imaging;
  • extraction