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Exploring the coordination chemistry of bifunctional organoarsonate ligands: Syntheses and characterisation of coordination polymers that contain 4-(1,2,4-triazol-4-yl)phenylarsonic acid
VENKATESAN, MUNUSWAMY
This account describes the coordination chemistry of a novel bifunctional arsonic acid ligand, 4-(1,2,4-triazol-4-yl)phenylarsonic acid (H2TPAA) that contains a triazole group. Hydrothermal reactions of transition metal salts with H2TPAA produced five unprecedented coordination polymers: [Co(H2TPAA)(HTPAA)2]?H2O (1), M(HTPAA)Cl?2H2O (M = Cu (2), Co (3)) and M(HTPAA)2 (M = Mn (4), Cd (5)). These five polymers have been fully characterized by single crystal and powder X-ray diffraction, thermogravimetric analysis, infra-red spectroscopy and elemental analysis. Single crystal X-ray diffraction reveals that 1, 2 and 3 adopt 2-D layered structural motifs whereas 4 and 5 are 3-D frameworks. 1 and 3 are the first examples of arsonate-stabilised cobalt(II) coordination polymers. Likewise, 4 is recognised as the first record of a MnII arsonate coordination polymer with 3-D framework topology. Its isostructural Cd analogue 5 shows characteristic ligand-centered fluorescence properties. Magnetic measurements of 2 and 4 reveal predominant antiferromagnetic interactions between their respective spin centers while, in agreement with its chain structure, 3 exhibits one-dimensional magnetic behavior with weak ferromagnetic interactions between the spin centres.
Keyword(s): novel bifunctional arsonic acid ligand
Publication Date:
2014
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: Trinity College Dublin
Citation(s): Lin, J.-D., Cl?rac, R., Rouzi?res, M., (...), Chimamkpam, T.O., Schmitt, W., Exploring the coordination chemistry of bifunctional organoarsonate ligands: Syntheses and characterisation of coordination polymers that contain 4-(1,2,4-triazol-4-yl)phenylarsonic acid, CrystEngComm, 16, 34, 2014, 7894-7905
First Indexed: 2015-03-07 05:50:29 Last Updated: 2019-11-29 06:26:39