Thiol-ene Polymer Microbeads Prepared Under High-Shear and Their Successful Utility as a Heterogeneous Photocatalyst via C-60-capping
Chemistry and Biochemistry
A series of thiol-ene (1.1:1 equiv) polymer microbeads (PMBs) were prepared via a high-shear suspension photopolymerization method to explore the physical properties of the networks as a function of composition. 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H, 3H, 5H)-trione (TTT) and pentaerythritol tetrakis (3-mercaptopropionate) (PETMP) PMBs were selected for the synthesis of a heterogeneous photocatalyst. Particle size was characterized using DLS and OM, and thermal stability and T-g were assessed using TGA and DSC. PMBs produced from higher functionality monomers produce smaller particles, and T-g increased with monomer rigidity. TTT-PETMP PMBs were derivatized with C-60 to demonstrate the accessibility and reactivity of the residual thiols, successful inclusion of C-60 as the reactive ene moiety, and overall PMB utility as a scaffold material. Upon capping with C-60, the T-g of the composite particles increased significantly. Most importantly, the C-60-capped PMBs produced singlet oxygen in direct and indirect chemical assays, and the efficiency did not decrease after recycling. (C) 2016 Elsevier Ltd. All rights reserved.
Barker, E. M.,
(2016). Thiol-ene Polymer Microbeads Prepared Under High-Shear and Their Successful Utility as a Heterogeneous Photocatalyst via C-60-capping. Polymer, 92, 66-73.
Available at: https://aquila.usm.edu/fac_pubs/17441