Visible light pH change for activating polymers and other pH dep

Details Visible light pH change for activating polymers and other pH dep Visible light pH change for activating polymers and other pH dep

1998-08-20

2000-11-07

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

C07C 100

Patent

active

061431389

ABSTRACT:
A method and apparatus for initiating a rapid and long-lasting pH change to a pH dependent polymer or other pH driven reactant is provided by a pH jump molecule in solution. Visible light is used to excite the pH jump molecule. The attendant pH change occurs rapidly (in nanoseconds) and can be maintained by continuous wave light or by an appropriately pulsed light. Heat resulting from the light activation is efficiently discharged by radiative decay through room temperature phosphorescence lifetimes existing on the order of milliseconds.

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Campillo, "Laser pH Jump", IEEE/OSA Conference on Laser Engineering and Applications, 1979, 24D, no month available.
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