Photoacid generators for catalytic decomposition of polycarbonate

Microwave-Assisted Formation of Sulfonium Photoacid Generators

Characterization of novel sulfonium photoacid generators and their microwave-assisted synthesis.

Microwave-assisted synthesis of triarylsulfonium salt photoacid generators (PAGs) afforded reaction times 90 to 420 times faster than conventional thermal conditions, with photoacid quantum yields of new sulfonium PAGs ranging from 0.01 to 0.4.

Investigation of Acid diffusion during laser Spike Annealing with Systematically designed Photoacid generators

The post-exposure bake in the lithographic process has a primary influence on resist performance as the time/temperature profile controls both the diffusion of photogenerated acids and the deprotection of the resist backbone. We utilize a laser (CO2) based scanned heating system to achieve sub-millisecond heating durations with temperatures up to the thermal decomposition limit of the resist. T...

Catalytic Decomposition of Potassium Monopersulfate. The Kinetics

Potassium monopersulfate has been decomposed in aqueous solution in the presence of Co(II). The process has been simulated by means of a mechanism based on elementary reactions. Rate constants have been taken from literature reports or, alternatively, assimilated to analogous reactions occurring in Fenton ́s chemistry. Several operating conditions have been successfully applied. Keywords—Monoper...

Catalytic Decomposition of Cellulose under Biological Conditions.

1. The catalytic decomposition of undegraded cellulose in the form of cotton fibres is described with hydrogen peroxide at 0.4-0.04% (w/v) concentration in the presence of ferrous salts at pH3-5. 2. Complete solubilization of 5mg. of cotton fibres occurred in about 7 days in the presence of 0.4% hydrogen peroxide and 0.2mm-ferrous sulphate at the optimum pH4.2-4.3. 3. With 0.4% hydrogen peroxid...