Neutral and anionic duality of 1,2,4-triazole α-amino acid scaffold in 1D coordination polymers
(2012) Hyperfine Interactions — Vol. 205, n° 1-3, p. 57-61 (2012)
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- A tiny supramolecular synthon, 4H-1,2,4-triazol-4-yl acetic acid (HGlytrz) which is bifunctional by design having an electronic asymmetry and conformational flexibility has been introduced to synthesize iron(II) complexes. Having 1,2,4-triazole or carboxylic extremities on the same framework HGlytrz could display dual functionality by acting as a neutral as well as anionic ligand based on the possibility of deprotonation of carboxylic group. Four new iron(II) HGlytrz complexes with ClO 4 - (1), NO 3 - (2), BF 4 - (3) and CF 3SO 3 - (4) anions were prepared. Formulation of their composition which is complicated due to ligand deprotonation is discussed. Unlike its ester protected counterpart ethyl-4H-1,2,4-triazol-4-yl-acetate (αGlytrz) which show hysteretic room temperature spin crossover, 1-4 remain in the high-spin state as revealed by 57Mössbauer spectroscopy. Prospects of such 1D coordination polymers with dangling unbounded carboxylic entities in the realm of self-assembled monolayer (SAM) are discussed. © 2011 Springer Science+Business Media B.V.
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Naik, A. D., DÎrtu, M. M., & Garcia, Y. (2012). Neutral and anionic duality of 1,2,4-triazole α-amino acid scaffold in 1D coordination polymers. Hyperfine Interactions, 205(1-3), 57-61. https://doi.org/10.1007/s10751-011-0414-5 (Original work published 2012)