5 Covalent Assemblies of Metal Nanoparticles—Strategies …
185
Fig. 5.38 a Molecular structures of the “background” DDA surfactant and of the photoresponsive
azobenzene-thiol ligand, AT. b Schematic representation of a photoswitchable Au NP system.
Dispersed NP are catalytically active; aggregated NP are catalytically inactive. c Hydrosilylation of
4-methoxybenzaldehyde catalyzed by Au NP in dry toluene at 39 °C and under argon. Reproduced
with permission from Ref. [175]
Fig. 5.39
a Percent conversion for the Au NP-catalyzed hydrosilylation of 4methoxybenzaldehyde as a function of time under irradiation with visible light (red markers) and
under 365 nm UV irradiation (blue markers). Surface coverage of azobenzene ligands on the Au NP
was χ = 0.3. b Hydrosilylation of 4-methoxybenzaldehyde can be switched “on” by visible light
(red portions of the curve) and “off” by UV (blue portions). For the experiments shown, χ = 0.31.
Error bars were calculated based on standard deviations from three NP batches, three samples per
batch. Reproduced with permission from Ref. [175]
185
Fig. 5.38 a Molecular structures of the “background” DDA surfactant and of the photoresponsive
azobenzene-thiol ligand, AT. b Schematic representation of a photoswitchable Au NP system.
Dispersed NP are catalytically active; aggregated NP are catalytically inactive. c Hydrosilylation of
4-methoxybenzaldehyde catalyzed by Au NP in dry toluene at 39 °C and under argon. Reproduced
with permission from Ref. [175]
Fig. 5.39
a Percent conversion for the Au NP-catalyzed hydrosilylation of 4methoxybenzaldehyde as a function of time under irradiation with visible light (red markers) and
under 365 nm UV irradiation (blue markers). Surface coverage of azobenzene ligands on the Au NP
was χ = 0.3. b Hydrosilylation of 4-methoxybenzaldehyde can be switched “on” by visible light
(red portions of the curve) and “off” by UV (blue portions). For the experiments shown, χ = 0.31.
Error bars were calculated based on standard deviations from three NP batches, three samples per
batch. Reproduced with permission from Ref. [175]