abstract
A one-dimensional ladder-type coordination polymer, poly[[(mu(2)-hydroxido)(mu(2)-1H-pyrazole-3,5-dicarboxylato)gallium(III)] monohydrate], [Ga(C5H2N2O4)-(OH)(H2O)](n) or [Ga(HPDC)(OH)(H2O)](n), I, isotypic with a V3+ coordination polymer previously reported by Chen et al. [J. Coord. Chem. (2008). 61, 3556-3567] was prepared from Ga3+ and pyrazole-3,5-dicarboxylic acid monohydrate (H3PDC center dot H2O). Compound I was isolated using three distinct experimental methods: hydrothermal (HT), microwave-assisted (MWAS) and one-pot (OP) and the crystallite size should be fine-tuned according to the method employed. The coordination polymeric structure is based on a dimeric Ga3+ moiety comprising two mu(2) -bridging hydroxide groups, which are interconnected by HPDC2- anionic organic linkers. The close packing of individual polymers is strongly directed by the supramolecular interactions, namely several O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen-bonding interactions.
keywords
METAL-ORGANIC FRAMEWORK; WATER-ADSORPTION; ROUTES; MOFS
subject category
Crystallography
authors
Simoes, AB; Figueira, F; Mendes, R; Barbosa, JS; Rocha, J; Paz, FAA
our authors
Filipe Alexandre Almeida Paz
Principal Researcher
Flávio Alberto da Silva Figueira
Junior Researcher
Jéssica Barbosa
PhD Student
João Rocha
Full Professor
Ricardo Faria Mendes
Junior Researcheracknowledgements
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. The research contract of FF (REF-168-89-ARH/2018) is funded by national funds (OE), through FCT (Fundacao para a Ciencia e a Tecnologia, IP), in the scope of the framework contract foreseen in Nos. 4, 5 and 6 of article 23 of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. ABS also acknowledges the scholarship BIC/UI89/8428/2018. The authors are also grateful to the Portuguese NMR Network (RNRMN). FCT is also gratefully acknowledged for the PhD grant No. PD/BD/135104/2017 (to JSB) and for the Junior Research Position for RFM (CEECIND/00553/2017).