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Title: Drawing with Iron on a Gel Containing a Supramolecular Siderophore

Journal Article · · Angewandte Chemie
 [1];  [1];  [2];  [1]; ORCiD logo [1]
  1. Department of Chemistry and Biochemistry University of Maryland College Park MD 20742 USA
  2. Department of Geology University of Maryland College Park MD 20742 USA

Abstract 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 Fe 3+ . 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 Fe 3+ . We patterned the hydrogel's surface with FeCl 3 , 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–Fe 3+ motifs, is strong, can be molded into different shapes, and is stable on the bench or under salt water.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; FG02-98ER14888
OSTI ID:
1573078
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 51 Vol. 131; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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