22042-73-5Relevant articles and documents
Synthesis of the end-functionalized polymethyl methacrylate incorporated with an asymmetrical porphyrin group via atom transfer radical polymerization and investigation on the third-order nonlinear optical properties
Qiu, Nannan,Liu, Dajun,Han, Shuangli,He, Xingquan,Cui, Guihua,Duan, Qian
, p. 65 - 72 (2013)
A novel asymmetrical zinc(II) porphyrin (ZnPor-Br) was synthesized as the initiator for the atom transfer radical polymerization (ATRP). Using CuBr/2,2′-dipyridyl as the catalyst system, the ATRP of polymethyl methacrylate (PMMA) was carried out to afford
Thermoresponsive dynamic covalent single-chain polymer nanoparticles reversibly transform into a hydrogel
Whitaker, Daniel E.,Mahon, Clare S.,Fulton, David A.
, p. 956 - 959 (2013)
To gel and back: Polymer nanoparticles can be reversibly transformed into a chemically cross-linked hydrogel. This transformation is triggered by the application of heat, which causes the polymer chains to aggregate, and the dynamic nature of the covalent cross-linking serves to reorganize the polymer chains into a hydrogel network. Copyright
Chemoselective and ligand-free aerobic oxidation of benzylic alcohols to carbonyl compounds using alumina-supported mesoporous nickel nanoparticle as an efficient recyclable heterogeneous catalyst
Das, Asit Kumar,Nandy, Sneha,Bhar, Sanjay
, (2021/05/10)
An economically efficient and operationally simple ligand-free protocol for the chemoselective oxidation of benzylic alcohols to carbonyl compounds has been developed using alumina-supported nickel nanoparticles as a stable recyclable heterogeneous catalyst along with potassium tert-butoxide in the presence of aerial oxygen as an eco-friendly oxidant. The aliphatic alcohols remained unaffected under the present condition. Excellent chemoselectivity has also been demonstrated through intermolecular and intramolecular competition experiments. This protocol accommodates a diverse range of substituents with the tolerance of various sensitive moieties during the reaction. The catalyst could be recovered by filtration and reused consecutively without any significant loss in the catalytic activity. Moreover, the heterogeneity of the catalyst has also been established by the “hot filtration method (Sheldon's test)”.
Four component Passerini polymerization of bulky monomers under high shear flow
Barner-Kowollik, Christopher,Bui, Aaron H.,Raston, Colin L.,Truong, Vinh X.,Tuten, Bryan T.,Wiedbrauk, Sandra
supporting information, p. 8328 - 8331 (2021/08/25)
We introduce a four component Passerini polymerization utilizing sterically bulky isocyanide monomers. Under typical Passerini conditions, bulky isocyanides do not react within standard Passerini reaction timescales (hours). We overcome this challenge via the unique physiochemical conditions present in a vortex fluidic device, reducing the reaction time to 2 h on average. Under these high-shear thin-film conditions, bulky isocyanides are readily incorporated into the multicomponent polymerization without the need of high-pressure or temperature. Finally, we demonstrate that the four component approach using functional cyclic anhydrides allows for post-polymerization modification.
