HETEROCYCLES

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■ Heterocycles in Organic Materials Chemistry. Synthesis of Di-, Tri-, and Tetraimide Polycarboxylic Acids for Use in Organic Network Assembly

Ken S. Feldman,* Yanze Liu, Joe C. Saunders, Katherine M. Masters, and Robert F. Campbell

*Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, U.S.A.

Abstract

Seven linear divalent monomers, three bent divalent amide-containing monomers, 11 bent divalent ester-containing monomers, one planar trivalent monomer, and two tetrahedral tetravalent monomers were prepared by imide-forming condensation of the appropriate polyamine hub with a specially designed anhydride connector unit. These polyvalent polycarboxylic acid monomers were subjected to crystallization/photochemical crosslinking studies in an attempt to prepare periodic, covalent organic solids. Difficulties in achieving suitable crystals have so far frustrated efforts to reach this goal.