Polymerization of Ureidopyrimidinone-Functionalized Olefins by Using Late-Transition Metal Ziegler-Natta Catalysts: Synthesis of Thermoplastic Elastomeric Polyolefins

Coils, Rods and Rings in Hydrogen‐Bonded Supramolecular Polymers

“…[42] With small amounts of UPy units in the polymer chain, the polyolefins show thermoplastic elastomeric properties. This approach is related to the work of Stadler, who used urazoylbenzoic acid groups in telechelic hydrogen-bonded networks.…”

Cross-linked and functionalized ‘universal polymer backbones’ via simple, rapid, and orthogonal multi-site self-assembly

“…3 -11 Impressive examples include the work by Stadler and co-workers who reported reversible polymer network formation via intermolecular hydrogen bonding of urazoylbenzoic acid groups situated at the chain ends of polyisobutylene 12,13 and Coates and co-workers who synthesized reversible thermoplastic elastomers using self-dimerizing ureidopyrimidone units. 7 Furthermore, Rotello and co-workers have exploited thymine-diaminopyridine interactions to prepare micron-sized aggregates via simple mixing of bisthymine cross-linking agents and diaminopyridine functionalized poly(styrene). 4 The second class of non-covalent interactions that have been employed in cross-linking studies is metal-coordination, which holds a number of important advantages and differences to its hydrogen-bonding analog.…”

Nucleobase-Containing Gelators

“…Base pair formation is the principal interbase hydrogen-bonding motif, and has been used for specific recognition of receptors [55], as the mesogenic unit for liquid crystals [56], the cross-linkage of polymer systems [57][58][59], and the connecting unit for supramolecular polymers [60]. Among them, inter-chain cross-linking of polymers by the base pairs at their side chains offers a convenient approach to a tunable gel, though they can not be included in the category of low molecular mass gelators.…”

“…As shown in Fig. 17a, association of a self-complementary nucleobase analog (ureidopyrimidinone) appended to a polyolefin chain caused reversible cross-link formation, leading to gelation of toluene [57]. The bulk polymer showed unique elastomeric properties due to the reversible network formation.…”

“…Among them, an interesting approach was reported by Meijer and his co-workers, polymeric assembly of monofunctional and bifunctional Fig. 17 Cross-linkage of polymer systems by use of (a) self-complementary sidechains [57] (b) a bifunctional cross-linker [58] and (c) a DNA cross-linker [59] building blocks having self-complementary nucleobase analogs, ureidotriazine derivatives, as the functional units [65]. They formed columnar stacks by the interbase hydrogen bonds and the stacking interaction.…”