Luan, Zhongyue published the artcileReversible Aggregation of Covalently Cross-Linked Gold Nanocrystals by Linker Oxidation, Quality Control of 7575-23-7, the main research area is gold nanocrystal aggregation thiol oxidation ligand.
Covalent crosslinking of colloidal gold nanocrystals (Au NCs) with dithiol mols. is normally considered to be an irreversible self-assembly process. Left unchecked, dithiol-mediated aggregation results in the uncontrolled formation of polymeric NC-dithiolate precipitates Here we demonstrate the reversible assembly and disassembly of dithiolate-linked precipitates and colloidal aggregates of Au NCs by oxidizing the dithiolate linkers with ozone. Destruction of the linkers results in the complete depolymerization of the NC aggregates/precipitates to re-form stable aqueous colloids of individual Au NCs with retention of the original NC size distribution. The process is repeatable by adding addnl. dithiol to reinitiate aggregation, although some irreversible fusion of the NCs occurs in subsequent cycles. This method for reversible self-assembly of covalently cross-linked Au NCs is simple, clean, reproducible, and effective for a variety of linkers. Extending reversibility to covalently bound NC assemblies creates new possibilities in plasmonic sensing and catalysis.
Journal of Physical Chemistry C published new progress about Aggregation. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts