Synthesis and Self-Assembly of 9,9'-Spirobifluorene-2,2',7,7'-tetracarboxylic Acid and Its Tetraamide. Non-Catenated Formation of Achiral Grid Layers with Large Chiral Pores

Abstract

The title tetrasubstituted spirobifluorenes 3a, 3b have been designed to serve as convenient achiral tectons for self-assembly of 2D layers with large chiral pores. The underlying stereochemical concept has been confirmed by analysis of tetraacid.

Self-assembly of the tetraamide led to markedly different results.

Keywords

• carboxylic acids
• spiro compounds
• X-ray diffraction
• hydrogen bonds
• supramolecular chemistry
• self assembly
• crystal engineering
• organic porous materials
• nanotubes
• enantiopure
• stacking
• squares
• compartments
• molecules
• chemistry
• design