Binder driven self-assembly of metal-organic cubes towards functional hydrogels

Papri Sutar, Venkata M. Suresh, Kolleboyina Jayaramulu, Arpan Hazra and Tapas Kumar Maji ()
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Papri Sutar: Jawaharlal Nehru Centre for Advanced Scientific Research
Venkata M. Suresh: Jawaharlal Nehru Centre for Advanced Scientific Research
Kolleboyina Jayaramulu: Jawaharlal Nehru Centre for Advanced Scientific Research
Arpan Hazra: Jawaharlal Nehru Centre for Advanced Scientific Research
Tapas Kumar Maji: Jawaharlal Nehru Centre for Advanced Scientific Research

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract The process of assembling astutely designed, well-defined metal-organic cube (MOC) into hydrogel by using a suitable molecular binder is a promising method for preparing processable functional soft materials. Here, we demonstrate charge-assisted H-bonding driven hydrogel formation from Ga3+-based anionic MOC ((Ga8(ImDC)12)12−) and molecular binders, like, ammonium ion (NH4+), N-(2-aminoethyl)-1,3-propanediamine, guanidine hydrochloride and β-alanine. The morphology of the resulting hydrogel depends upon the size, shape and geometry of the molecular binder. Hydrogel with NH4+ shows nanotubular morphology with negative surface charge and is used for gel-chromatographic separation of cationic species from anionic counterparts. Furthermore, a photo-responsive luminescent hydrogel is prepared using a cationic tetraphenylethene-based molecular binder (DATPE), which is employed as a light harvesting antenna for tuning emission colour including pure white light. This photo-responsive hydrogel is utilized for writing and preparing flexible light-emitting display.

Date: 2018
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DOI: 10.1038/s41467-018-05818-w

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