Guest-dependent host structures and host-induced guest assemblies

Abstract

Coordination polymer networks, [Cu-2(C26H52N10)(BDC)(2)]center dot 4H(2)O (1) and [Cu-2(C26H52N10)(BDC)(2)]center dot 2DHB center dot 4H(2)O (2) with 2Dbrick-wall structures, [Cu-2(C26H52N10)(BDC)(2)]center dot 4HB center dot 4H(2)O (3) with a 1D ladder structure, and [Cu-2(C26H52N10)(BDC)(H2O)(2)]center dot 2(THB)-(BDC)center dot 8H(2)O (4) with a 1D chain structure, have been assembled in water from a Cu-II bismacrocyclic complex [Cu-2(C26H52N10)(Cl)(4)]center dot 6H(2)O (A) and sodium 1,4-benzenedicarboxylate (Na2BDC) in the presence of no organic guest for 1, 1,4-dihydroxybenzene (DHB) for 2, hydroxybenzene (HB) for 3, and 1,3,5-trihydroxybenzene (THB) for 4. In the assembly of the networks, the guest molecule acts as a template and stabilizes the host structure by the hydrogen bonding or pi-pi stacking interactions. In addition, the guest molecules interact with each other as well as with the host to form 1D columns that occupy the channels in 1, 2, and 3, and the 2D noncovalent organic layers that are alternately packed with the host layers in 4.