Drawing with Iron on a Gel Containing a Supramolecular Siderophore
| Autor: | Jeffery T. Davis, Peter Y. Zavalij, Richard D. Ash, Songjun Xiao, Paul J. Paukstelis |
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| Rok vydání: | 2019 |
| Předmět: |
inorganic chemicals
Siderophore Hydroxamic acid 010405 organic chemistry technology industry and agriculture Supramolecular chemistry Cationic polymerization Guanosine General Medicine General Chemistry 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Polymer chemistry Self-healing hydrogels Chelation Self-assembly |
| Zdroj: | Angewandte Chemie International Edition. 58:18434-18437 |
| ISSN: | 1521-3773 1433-7851 |
| Popis: | Guanosine-5'-hydroxamic acid (3) forms hydrogels when mixed with guanosine (1) and KCl. The 5'-hydroxamic acid (HA) unit is pH-responsive and also chelates Fe3+ . When gels are prepared under basic conditions, the 5'-HA groups are deprotonated and the anionic hydrogel binds cationic thiazole orange (TO), signaled by enhanced fluorescence. The HA nucleoside 3, when immobilized in the G-quartet gel, acts as a supramolecular siderophore to form red complexes with Fe3+ . We patterned the hydrogel's surface with FeCl3 , by hand and by using a 3D printer. Patterns form instantly, are visible by eye, and can be erased using vitamin C. This hydrogel, combining self-assembled G-quartet and siderophore-Fe3+ motifs, is strong, can be molded into different shapes, and is stable on the bench or under salt water. |
| Databáze: | OpenAIRE |
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