Interaction with silver

Figure 3-9. The stepwise hydrolysis of an amino acid ester. The labilisation of the chloride by interaction with silver(i) is a crucial prerequisite to the formation of the reactive chelated AO-bonded ligand.

Strained or bridged cycles substituted by at least one halide could be rearranged on treatment with silver salts. On the other hand, strained a bonds directly interact with silver ions, leading to bond breakage and thus initiating rearrangement. 

However, the ampholytes interact with silver and Coomassie stains used for the visualization of proteins in gel and must be removed after electrophoresis before the visualization of protein bands. 

SiAwsoN RM, Lee H and Trevors JT (1990) Bacterial interactions with silver. Biol Metab 3 151-154. 

The most popular mobile phases used in argentation HPLC have been mixtures of chloroform (80-90%) and acetic acid <0.5%) with varying proportions of acetonitrile and/or methanol to optimally adjust chromatographic retention. Addition of methanol to the mobile phase is thought to reduce interactions with polar groups on the stationary phase (Powell, 1982) while acetonitrile reduces retention by direct interaction with silver ions bound to the stationary phase, thereby reducing interactions with the olefinic unsaturated bonds (Merritt and Bronson, 1977). Adjustment of the composition of the mobile phase allows the specific types of interactions between the mobile phase, sample molecules and stationary phase to be enhanced or reduced in this way an optimal chromatographic separation can be achieved. 

Gas permeability is also one of the parameters used to detect a change in the structure of a polymer. Since paraffins, such as propane, do not have any specific interaction with silver ions and thus only permeate via normal sorption and diffusion transport, the permeability behavior of propane is mostly determined by the microstructure and chain mobility of a polymer complex. As such, the propane permeabilities of POZ films decrease rapidly with AgCp3S03 concentration, which is consistent with the results of the d-spacings and glass... 

Mikalo, R.P., G. Appel, P. Hoffmann, and D. SchmeiBer (2001). Band bending in doped conducting polypyrrole Interaction with silver. Synth. Met. 122, 249-261. 

Marchi, M.C., Bilmes, S-A., and Bilmes, G.M. (1999) Photophysics of rhodamine B interacting with silver spheroids. /. Colloid Interface Set, 218,112 117. 

Finally, SECM studies on single HeLa cells have also focused on their interaction with silver nanoparticles. The detection scheme relied on the interaction of an iridium hexachloride couple with silver nanoparticles. When the microelectrode approached the HeLa cells, two mechanisms competed with IrCV regeneration from IrClg by the silver nanoparticles adsorbed on the ceU surface IrCl " diffusing across the intracellular space and IrCI transported in the intracellular lumen where it could subsequently be reduced by an intracellular redox species or silver nanoparticles segregated in the nucleus (Eigure 12.23). 

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