Predicting Au-S bond breakage from the swelling behavior of surface tethered polyelectrolytes
Soft Matter,
2011,
7,
11496-11500.
文章链接：http://dx.doi.org/10.1039/c1sm05895a
张燕霞在Soft Matter发表研究论文
发布日期：2011-12-08
Surface tethered weak polyelectrolyte, carboxylated poly(OEGMA-r-HEMA), was prepared via surface initiated polymerization (SIP) from metal (Au, Pt and Ag) surfaces functionalized with initiators through metal–S bonds. The swelling behavior of carboxylated poly(OEGMA-r-HEMA) in phosphate buffered saline (PBS) was studied by quartz crystal microbalance (QCM) and was found to obey the following equation: Teff ¼ (0.32ln([Na+]) + 2.53) TCOOH,dry, where Teff and TCOOH,dry are the thicknesses of carboxylated poly(OEGMA-r-HEMA) in PBS measured by QCM and in air measured by ellipsometry, respectively. We also confirmed that the event of covalent bond breaking (CBB) of Au–S bonds occurred at a certain critical Teff, i.e. 255 nm. Thus, one could predict the CBB of Au–S or other metal–S bonds from the swelling behavior of surface tethered carboxylated poly (OEGMA-r-HEMA).
