Inspired by one of the oldest photochemical reactions that is used in the cyanotyping process, we created materials that utilize the coordination of Fe(III) with carboxylate groups on the polymer backbone. These polysaccharide-based materials are photoresponsive and we can tune and change the mechanical properties of these materials using light. These Fe(III)-coordinated materials can be used to create hybrid conductive hydrogels, or as nutrient sponges, capable of reclaiming and recycling phosphate, ammonia, and nitrate from dairy waste. The hydrogel nutrient sponges can then be used as an effective solid fertilizer, limiting run-off and helping to minimize cyanobacterial harmful algae blooms.  <br/>We can also use V(V) coordination in polysaccharide materials to create robust bioplastics. The V(V) metal coordination interactions give surprisingly strong and stable polysaccharide materials that are able to keep tensile strength even after soaking in water for more than 10 minutes, a benchmark that all-polysaccharide materials are unable to reach since they degrade and lost strength in water. These materials may find application as an alternative to petroleum-based plastic materials due to their enhanced mechanical strength and stability.

From cyanotypes to cyanobacteria: Designing responsive materials with Fe(III) and V(V) photochemistry to solve environmental problems

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.