Chemoenzymatic dynamic kinetic resolution (DKR) of rac-1-phenyl ethanol into R-1-phenylethanol acetate was investigated with emphasis on the minimization of side reactions. The organometallic hydrogen transfer (racemization) catalyst was varied, and this was observed to alter the rate and extent of oxidation of the alcohol to form ketone side products. The performance of highly active catalyst ...

Hydrogel preparation under NIR light via a photoinduced RAFT polymerization catalyzed by tetrasulfonated zinc phthalocyanine is reported Cyrille Boyer et al. in their Research Article (e202302451). Exploiting enhanced penetration of light, gelation effectively performed through barriers. Thiocarbonylthio groups embedded hydrogel networks facilitate the reactivation polymer chains wavelengths, e...

Hydrogel preparation under NIR light via a photoinduced RAFT polymerization catalyzed by tetrasulfonated zinc phthalocyanine is reported Cyrille Boyer et al. in their Research Article (e202302451). Exploiting enhanced penetration of light, gelation effectively performed through barriers. Thiocarbonylthio groups embedded hydrogel networks facilitate the reactivation polymer chains wavelengths, e...

We report the triggered release of Ca2+ from liposomal compartments to induce rapid gelation of protein-based hydrogels. Phototriggerable liposomes were designed by entrapping CaCl(2) within liposomes composed of 38:57:5 diplasmenylcholine (DPPlsC):disteroylphosphatidylcholine (DSPC):bacteriochlorophyll (Bchl). These liposomes release >80% of their entrapped Ca2+ within 15 min when irradiated a...

29Si NMR spectroscopy of concentrated silicate sols, prepared by acid-catalyzed hydrolysis of TEOS in ethanol with H20/Si ratios, r -1.5 or 1.7, followed by alcohol evaporation, shows that the polysilicate species responsible for spinnability are not simple rigid-rod, ladder polymers or linear polymers. Instead a distribution of silicate species is observed consistent with the products of a sta...

Biomimetic, strain-stiffening materials are reported, made through self-assembly and covalent fixation of small building blocks to form fibrous hydrogels that are able to stiffen by an order of magnitude in response to applied stress. The gels consist of semi-flexible rodlike micelles of bisurea bolaamphiphiles with oligo(ethylene oxide) (EO) outer blocks and a polydiacetylene (PDA) backbone. T...