Self-reporting visible light-induced polymer chain collapse

Abstract

We introduce a facile photoinduced self-reporting crosslinking methodology for the compaction of polymer chains in highly diluted solution.

Macromolecular Superstructures: A Future Beyond Single Chain Nanoparticles

“…As the desired intrachain reaction competes with the parasitic interchain reaction, concentrations <1 mg mL −1 are the current standard to achieve a selectivity for the intramolecular folding . Some examples require even lower concentrations of 0.02 mg mL −1 , 0.03 mg mL −1[17] or 0.04 mg mL −1 . Such low concentrations do not only drastically limit the scalability of SCNP synthesis, yet critically impede the online monitoring of the reactions – paramount towards improving our understanding of the folding process.…”

Advances in the Phototriggered Synthesis of Single-Chain Polymer Nanoparticles

“…Recently, Barner-Kowollik and coworkers [36] have introduced a facile, photoinduced self-reporting methodology for the compaction of polymer chains in highly diluted solution based on intrachain radical coupling of carboxyl radicals (Figure 2g). The carboxyl radicals were generated via light-induced fragmentation of pyrene-substituted oxime ester moieties along a polymer chain.…”

“…Several applications have been suggested for the different SCNPs prepared from photocross-linking, including (i) imprintable nano-materials with high binding capacities and selectivities [21]; (ii) tunable nanoreactors for the synthesis of gold nanoparticles (AuNPs) [23,24]; (iii) CO 2 -capture nanomaterials [24]; (iv) advanced Janus surfactants [28]; (v) biohybrid vesicles as protein carriers [29]; (vi) carbon nanotube catchers [30]; (vii) photoresponsive liquid crystalline nanomaterials [25,34]; (viii) new, fluorescent, soft nanomaterials [26,27,28,29,30,31,32,36,37,38,40,42,47,48,49,50,53]; (ix) adaptative, dynamic nano-particles [43,44,45]; (x) totally deuterated nanomaterials for the investigation of the structures and dynamics of all-polymer nanocomposites [41]; (xi) photodegradable nanomaterials [58]; and (xii) nanoreactors for the syntheses of polymers [59].…”

“…Chain folding was accompanied by the release of pyrene units inducing fluorescence in the initially non-fluorescent solution. Reprinted from [36] with permission.…”

Trendbericht: Makromolekulare Chemie

“…Die Gruppe um Mutlu erreichte dies, indem sie statistisch verteilte Pyren-Oximesterderivate nutzte. 47) Für die Passerini-Reaktion sind in der Regel ein Isocyanat, eine Carbonylverbindung und eine Carbonsäure nötig. Tuten und Mitarbeiter haben die Carbonylverbindung in der Reaktion durch Thioaldehyde ersetzt.…”