Fig. 7. Guest-driven self-sorting in MOCs and polyMOCs containing L1 and L2 moieties.

A Schematic showing the statistical mixture of heteroleptic MOCs initially formed through mixing L1 and L2. When a guest that preferentially binds one of the homoleptic MOC structures is introduced, this homoleptic MOC and subsequent host-guest complex is preferentially enriched relative to other MOC structures. B Schematic of self-sorting driven sol-gel transitions within mixtures containing polymer-bound and small molecules ligands (PL1 and L2, respectively) with sub-stoichiometric Pd²⁺. C Fraction of L1 incorporated into MOC structures when L1 and L2 are present in equimolar amounts with sub-stoichiometric Pd²⁺ (33.3% excess of bispyridine ligands). The preference to incorporate L1 into MOC structures increases with strength and equivalents of guest added. D ¹H NMR spectra showing the reversible enrichment of L1 into MOC structures upon inclusion of DAQ, followed by depletion when the less selective guest, NO₃, is added. E Reversible sol-gel transitions achieved through self-sorting behavior. An initial mixture of PL1, L2, and Pd²⁺ form a free-flowing liquid that becomes a gel upon addition of DAQ. Error bars represent ±1 standard deviation.