Fig. 4: Fabrication and characterization of Pd2L4 polyMOC gels.
From: Nested non-covalent interactions expand the functions of supramolecular polymer networks
A. A polymer ligand (PL1) is combined with [Pd(MeCN)4][OTf]2 in DMSO. Annealing provides poly(OTf⊂MOC), which is composed of Pd2L4 MOC junctions. Additional guest molecules can be included before annealing to yield similar results. B CP-MAS 1H NMR spectra of polyMOC gels fabricated with and without added guests. Relative resonance shifts of Ha within polyMOC gels are in line with those of the analogous MOCs (see Fig. 1A), suggesting the guest binding remains unchanged when translated to a polyMOC gel. Resonances marked with an asterisk in the poly(DAQ⊂MOC) spectrum belong to cage-bound DAQ. Full spectra are shown in Figures S25–S28. Slight shoulder peaks may be due to MOC clustering within the gel that could modify guest-binding behavior. C Comparison of gel shear modulus (G’) as measured at 1 rad/s. Inclusion of guest has no statistically significant impact on modulus. Full frequency sweep data are shown in Supplementary Fig. 29. Error bars represent ±1 standard deviation.
