Crystal Engineering: Lattice Inclusion Based on O?H···O Hydrogen-Bonded Self-Assembly and Guest-Induced Structural Mimicry

摘要

Pyrene−tetraphenol TP2 constitutes a molecular systemnwith inherent features for inclusion of two or more guest molecules thatnare complementary in terms of size and shape. Hydrogen-bonded selfassemblynof TP2 in the solid state is shown to lead to voids withinnwhich the guest molecules are incorporated. A large aromatic expansenextant to the pyrene core in TP2 permits inclusion of two differentntypes of guest species interchangeably. The robust association manifestsnin packing equivalence in all of the inclusion compounds of TP2 withnthe exception of the compound formed with pyridine and odichlorobenzenenguests; in the latter, pyridine terminates the otherwisen3-dimensional hydrogen-bonded organization. The half-component ofnTP2, i.e., 4,6-bis(4-hydroxyphenyl)-m-xylene (BX), deduced by simplenstructural reduction, is shown to exhibit guest inclusion, but withnconsiderably less guest accessible volume. The limited yet meaningful set of guests allows mimicry of the two expected patternsnof molecular organization based on hydrogen bonding for both TP2 and BX in the solid state.