containing a Fujita’s sphere M 12 L 24 MOC (*3.5 nm) in the presence of Pd
2+
(schematic in Fig. 5.12a). The BCPMOCs derived from the M 12 L 24 MOC have
microphase-separated structures. The microphase separation was further characterized using small-angle X-ray scattering (SAXS) technique. Figure 5.12b shows
the scattering signals for a PMMA 8k –PBA 27k sample (the subscripts denote average
molecule weights). For linear BCPs without metal (blue curve), a single Bragg
reflection peak is observed proving the presence of phase-separated structures with
a d-spacing. In the presence of metal (purple curve), higher order scattering peaks
are detected in the SAXS spectrum. The q ratios for the scattering pattern of the
Fig. 5.11 a Schematic illustrations of a conventional coordination metallogel and supramolecular
polymer gels connected with M 2 L 4 and M 12 L 24 MOCs, b chemical structure of a bis-parapyridine-terminated polyethylene glycol chain and schematic illustration of the M 12 L 24 cage
self-assembled from the polymeric ligand and Pd
2+ , c chemical structure of a bis-meta-pyridineterminated polyethylene glycol chain and schematic illustration of the M 2 L 4 paddlewheel
self-assembled from the polymeric ligand and Pd
2+ . Reproduced with permission from Ref. [53].
Copyright 2015 Nature Publishing Group
170
5 Polymer Gels
2+
(schematic in Fig. 5.12a). The BCPMOCs derived from the M 12 L 24 MOC have
microphase-separated structures. The microphase separation was further characterized using small-angle X-ray scattering (SAXS) technique. Figure 5.12b shows
the scattering signals for a PMMA 8k –PBA 27k sample (the subscripts denote average
molecule weights). For linear BCPs without metal (blue curve), a single Bragg
reflection peak is observed proving the presence of phase-separated structures with
a d-spacing. In the presence of metal (purple curve), higher order scattering peaks
are detected in the SAXS spectrum. The q ratios for the scattering pattern of the
Fig. 5.11 a Schematic illustrations of a conventional coordination metallogel and supramolecular
polymer gels connected with M 2 L 4 and M 12 L 24 MOCs, b chemical structure of a bis-parapyridine-terminated polyethylene glycol chain and schematic illustration of the M 12 L 24 cage
self-assembled from the polymeric ligand and Pd
2+ , c chemical structure of a bis-meta-pyridineterminated polyethylene glycol chain and schematic illustration of the M 2 L 4 paddlewheel
self-assembled from the polymeric ligand and Pd
2+ . Reproduced with permission from Ref. [53].
Copyright 2015 Nature Publishing Group
170
5 Polymer Gels