Self-assembled metallogels formed from N,N′,N′′-tris(4-pyridyl)trimesic amide in aqueous solution induced by Fe(iii)/Fe(ii) ionsElectronic supplementary information (ESI) available: Synthesis and characterization of TPTA, the measurement data of SEM, DSC, 1H NMR, STM and UV-Vis spectra, Table S1, and Fig. S1-S9. See DOI: 10.1039/c5sm01513h
In this work, we report self-assembled metallogels formed from a ligand of trimesic amide, N , N ′, N ′′-tris(4-pyridyl)trimesic amide (TPTA), induced by Fe( iii )/Fe( ii ) ions. TPTA is difficult to dissolve in water even in the presence of some metal ions such as Cu 2+ , Co 2+ , Ni 2+ , K + , Na +...
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| Main Authors | , , , , , , |
|---|---|
| Format | Journal Article |
| Published |
16.12.2015
|
| Online Access | Get full text |
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| Summary: | In this work, we report self-assembled metallogels formed from a ligand of trimesic amide,
N
,
N
′,
N
′′-tris(4-pyridyl)trimesic amide (TPTA), induced by Fe(
iii
)/Fe(
ii
) ions. TPTA is difficult to dissolve in water even in the presence of some metal ions such as Cu
2+
, Co
2+
, Ni
2+
, K
+
, Na
+
and Mg
2+
under heating, and it exhibits no gelation ability. Interestingly, upon heating TPTA can be dissolved easily in aqueous solution containing Fe
3+
/Fe
2+
, and subsequently self-assembled into metallogels after cooling. The metallogels could also be formed in aqueous solutions of mixed metal ions containing Fe
3+
/Fe
2+
, indicating that the other metal ions do not affect the formation of Fe(
iii
)-TPTA and Fe(
ii
)-TPTA metallogels. The high selectivity of metallogel formation to Fe
3+
/Fe
2+
may be used for application in the test of Fe
3+
/Fe
2+
. The metallogels obtained are characterized by scanning electron microscopy, Fourier transform infrared spectra, nuclear magnetic resonance spectra, rheological measurements and scanning tunneling microscopy. The results indicate that TPTA can self-assemble into fibrous aggregates in Fe
3+
/Fe
2+
aqueous solution through the metal-ligand interactions and intermolecular hydrogen bonding. This kind of metallogel also possesses good mechanical properties and thermoreversibility.
We report the self-assembled metallogels formed from
N
,
N
′,
N
′′-tris(4-pyridyl)trimesic amide (TPTA) in aqueous solution containing Fe
3+
/Fe
2+
. This high selectivity of metallogel formation to Fe
3+
/Fe
2+
may be used for the metallogel application in the test of Fe
3+
/Fe
2+
. |
|---|---|
| Bibliography: | 10.1039/c5sm01513h 1 H NMR, STM and UV-Vis spectra, Table S1, and Fig. S1-S9. See DOI Electronic supplementary information (ESI) available: Synthesis and characterization of TPTA, the measurement data of SEM, DSC |
| ISSN: | 1744-683X 1744-6848 |
| DOI: | 10.1039/c5sm01513h |