Toward the Design of Porous Organic Solids: Modular Honeycomb Grids Sustained by Anions of Trimesic Acid

Abstract

Scheme 1. Proposed reactions of Mn ions and tmtacn ligands in zeolite Y. Reaction a: In the chelation reaction, the Mn" ion leaves an all-zeolite coordination, for example on a six-membered ring, to form a mononuclear [ M n " ( t m t a~n ) ]~~ chelate complex. Reaction b: The interaction of [Mn"(tmta~n)]~'-NaY with H,O, in a wateriacetone medium leads to intrazeolite formation of Mnii'-MniV dinuclear complexes or other dimerization products (X = 0'-, OH-, or other oxygen bridges).

A C3‐Symmetric Macrocycle‐Based, Hydrogen‐Bonded, Multiporous Hexagonal Network as a Motif of Porous Molecular Crystals

“…[4a] 3) Conventional systems such as 1,3,5-and hexasubstituted benzene derivatives [3,4] usually result in a network with uniform-shaped voids (Figure 1 a).…”

“…To date, 3D assemblies based on porous H-HexNets have been constructed from molecules such as 1,3,5-substituted benzene derivatives, [3,4] aliphatic tricarboxylic acids, [5] hexasubstituted benzene derivatives, [6] phosphazene derivatives, [7] and others.…”

Building molecular frameworks with tailored pore structures

“…10), which could be regarded as expanded versions of the 'chicken-wire' motif reported for trimesic acid alone. 38,39 Pairs of ammonium cations acts as 'spacer' molecules between pairs of carboxylate substituents on the TMA 3À anions, creating large hexagonal pores. The cyclohexyl substituents project into the hexagonal pores, with six cyclohexyl groups lying in the midplane of the pore, three projecting above the plane, and the remaining three projecting below the plane.…”

An alternating chain of spider-like tris(peptides) stabilized by stacking and by N–H⋯N and N–H⋯OC hydrogen bonding

“…A main challenge in crystal engineering and supramolecular chemistry is to use basic concepts for design and development of structures in a desired shape, which can assemble in a predictable, pre-determined fashion to generate special structural components [5,6], such as sheets [7], ribbons [8], tubes [9] and rods [10]. Hydrogen bonds and p-p aromatic contacts are commonly used as tools to link molecules into such supramolecular assemblies.…”