Photo-induced micellization of poly(4-pyridinemethoxymethylstyrene)-block-polystyrene using a photo-acid generator

Light Triggered Co‐Assembly of Photocleavable Copolymers and Polyoxometalates with Enhanced Photoluminescence

“…Motivated by the main envisioned application in drug delivery, light‐induced irreversible disruption of block copolymer micelles for release of the caged small molecules has been widely investigated . In comparison, light‐induced irreversible formation of micelles instead of disruption has much less been used . In fact, light‐induced micellization could be very promising in the field of encapsulation, such as in situ product removal or separation by micellar extraction .…”

“…[10,11] In comparison, light-induced irreversible formation of micelles instead of disruption has much less been used. [12][13][14][15][16] In fact, lightinduced micellization could be very promising in the field of encapsulation, such as in situ product removal or separation by micellar extraction. [17,18] When encapsulation of a molecule in the block copolymer solution is in demand, the trapping process can be initiated by light, and controlled by adjusting the wavelength, the intensity, and the irradiation time of light, without changing the medium parameters (pH, temperature, chemical additives).…”

Photo-induced micellization of block copolymers bearing 4,5-dimethoxy-2-nitrobenzyl side groups

“…Although light-responsive block copolymers have been largely used for micelle disruption and drug release, [26][27][28][29][30][31] only few examples of light-induced micellization have been reported. [32][33][34][35][36] To the best of our knowledge, only two examples of direct, i.e., starting from unimers, light-induced micellization have been reported. The first one is based on the photolysis of a poly(tertbutoxystyrene)-block-polystyrene diblock copolymer (PBSt-b-PSt) promoted by a photoacid generator, 34,35 and the second one deals with photo-induced micellization thanks to an electron transfer from poly(4-pyridinemethoxy-methylstyrene)-blockpolystyrene to a diaryliodonium salt in organic media.…”

“…The first one is based on the photolysis of a poly(tertbutoxystyrene)-block-polystyrene diblock copolymer (PBSt-b-PSt) promoted by a photoacid generator, 34,35 and the second one deals with photo-induced micellization thanks to an electron transfer from poly(4-pyridinemethoxy-methylstyrene)-blockpolystyrene to a diaryliodonium salt in organic media. 36 This contribution reports on the synthesis, the self-assembly and the use as trapping agents of photocleavable block copolymers containing o-nitrobenzyl esters. These block copolymers are composed of a poly(4,5-dimethoxy-2-nitrobenzyl acrylate)block, and of a polystyrene block (PDMNBA-b-PS).…”

Effects of Illuminance and Heat Rays on Photo-Controlled/Living Radical Polymerization Mediated by 4-Methoxy-2,2,6,6-Tetramethylpiperidine-1-Oxyl

“…A significant variety of photo-controlled systems has been created using reversible and also irreversible photoreactions. Examples include the photo-controlled mechanical motion of crystals through the azobenzene photoisomerization [1], the photo-controllable changes in surface morphology of salt crystals by enantiospecific and enantioselective photocyclization of a benzophenone derivative [2], the photo-induced wetting properties on an ultrathin ZnO-coated surface [3], the photo-responsive loading and release of drugs on nanoparticle [4] and nanofiber surfaces [5], self-assembly induced by photo irreversible reactions of photolysis [6][7][8], photo-rearrangement [9], and photo onium salt formation [10] for block copolymers, size change of core-shell nanogel particles through the photodimerization and photocleavage of coumarin [11], magnetization of CdS-modified nanoparticles by photoinduced electron transfer from CdS to Prussian blue [12], DNA cleavage by the combination of the photoactive Zn(II) cooperation and the azobenzene photoisomerization [13], the inhibition of telomerase activity by photo-cross-linking [14], and the photoswitch to induce paralysis in a living organism using the photocyclization of bis(pyridinium)-dithienylethene [15].…”