COLL 217 |
| Priya Parameswaran and Bakul C. Dave. Department of Chemistry and Biochemistry, Southern Illinois University,Carbondale, Mail Stop 4409, Southern Illinois University, Carbondale, IL 62901 |
| The use of environmentally-responsive silica sol-gels as active materials for light-regulated release, separation, and delivery will be the focus of this presentation. The organosilica sol-gels exhibit bulk volume changes with respect to several environmental variables including temperature, light, pH, salt, and solvents which can be used as a means for stimuli-regulated release and separation. This presentation will extend the approach and outline a novel strategy for regulating the selectivity of these sol-gels with light as a stimulus for regulating and controlling the selectivity of the sol-gels toward certain molecular dopants. The approach of altering the properties of sol-gels with exposure to light will be utilized for design of a photo-responsive system whose selectivity can be externally regulated. Results on photocontrolled release and separation of dyes molecules will be used as a basis to demonstrate the feasibility of using light as a control mechanism for photoregulated release, separation, and delivery of molecular entities. The potential utility of this system for applications related to stimuli-controlled delivery systems in will be elaborated. |
|
Posters: Fundamental Research in Surface and Colloid Chemistry
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |