Picosecond dynamics of silver nanoclusters. Photoejection of electrons and fragmentation
Article Abstract:
The photochemical responses of silver nanoclusters to ultraviolet and visible laser stimuli were examined. The silver colloids were prepared via conventional method of reducing silver nitrate in water with sodium citrate at almost-boiling temperature. It was revealed that nanoparticles of noble metals exhibited photochemical activity when exposed to ultraviolet irradiation. Fragmentation in the 40-60 nm silver particles, generated by citrate reduction method, occurred when exposed to 355 or 532 nm laser-pulse excitation.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Peroxyester decarboxylation studied by picosecond transient IR spectroscopy
Article Abstract:
Research was conducted to examine the decarboxylation of tert-butyl-9-methylfluorene-9-percarboxylate using picosecond UV pump infrared probe spectroscopy. The time evolution of the CO2 concentration should indicate whether the peroxyester decomposition takes place in a concerted or in a stepwise manner. Results reveal that the photodecomposition of tert-butyl-9-methylfluorene-9-percarboxylate primarily takes place via concerted or ultrafast consecutive bond scission within a couple of picoseconds.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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