Single‐Chain Folding Nanoparticles as Carbon Nanotube Catchers

Abstract

This contribution describes a simple method for preparing polymeric nanoparticles using photodimerization of anthracene moieties on the side chain of terpolymers in dilute regime and transformation of obtained polymeric nanoparticles into pyrene functional nanoparticles via Menschutkin quaternization procedure. Subsequently, pyrene possessing polymeric nanoparticles are attached onto multiwalled carbon nanotube (MWCNT) surfaces by π-π stacking strategy. Gel permeation chromatography, thermal gravimetric analysis, ultraviolet-visible, and fluorescence spectroscopies are used to analyze modified nanoparticles and their precursors. Electron microscopy and dispersion studies show that pyrene-modified polymeric nanoparticles are able to interconnect various CNTs.Additional supporting information may be found in the online version of this article.

Advances in the Phototriggered Synthesis of Single-Chain Polymer Nanoparticles

“…Remarkably, the resulting nanoparticles exhibited redox and ligand-binding reactivity similar to that of native heme proteins. Subsequently, the strategy of intrachain photodimerization of pendant anthracene units was adopted by Zhao et al to construct amphiphilic, Janus twin SCNPs [28] and biohybrid vesicles by coassembly of proteins and tadpole-shaped SCNPs [29], and by Temel and coworkers [30] to develop SCNPs as carbon nanotube catchers. On the other hand, Simon and coworkers [31] pioneered the use of visible light (λ = 532 nm) in the presence of a sensitizer (platinum octaethylporphyrin) as the driving force for SCNP formation through dimerization of pendant anthracene groups via photochemical upconversion (see Figure 4).…”

“…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].…”

Versatile light‐responsive organogels: Evaluation of their dye releasing and photoinitiation behaviors

“…The photochemical process is one of the most desirable strategy to achieve functional materials and it is also important for green chemistry applications . Photoinduced radical polymerization technique has been employed in extensive applications, such as curing of polymeric coatings, polymers with controlled molecular weights, linear and branched copolymers, and single‐chain nanoparticles . Free‐radical photoinitiators consist of two particular classes: (a) type I that undergoes direct photolysis and widely used in various UV applications and (b) type II photoinitiators, which possess longer wavelength absorption compared to type I initiators .…”

Single‐chain polymer nanoparticles via click crosslinking and effect of photoinduced radical combination on crosslink points

“…Single-chain nanoparticles continue to be interesting owing to a wide variety of potential applications 1,3 such as sensors, catalysts and drug delivery systems. The folding process can be carried out using various synthetic approaches such as Diels-Alder chemistry, 5,6 photocrosslinking, [7][8][9][10][11][12][13] supramolecular interactions, [14][15][16] bisurea crosslinking 17 and atom transfer radical coupling. 18,19 The corresponding nanoparticles are more compact than their linear analogues and display a globular shape due to the reduction of their hydrodynamic radius resulting from intramolecular crosslinking.…”