Copper(II) coordination polymers constructed from aromatic polycarboxylate and flexible triazole ligands with different spacer lengths: syntheses, structures, and properties

Abstract

{[Cu₂(btm)₂(Hbtc)(H₂btc)₂(H₂O)]·9.5H₂O}_n (1), [Cu(bte)(H₂btc)₂]_n (2) {[Cu(btp)(H₂btc)₂]·0.25H₂O}_n (3) (btm = bis(1,2,4-triazol-1-yl)methane, bte = bis(1,2,4-triazol-1-yl)ethane, btp = bis(1,2,4-triazol-1-yl)propane, H₃btc = benzene-1, 3, 5-tricarboxylic acid) have been synthesized and structurally characterized. 1 features a 1-D double chain, which is interconnected by classical hydrogen-bonding (O–H⋯O) and π–π interactions to lead to a 3-D supramolecular architecture. 2 and 3 are both 1-D single chains, which are interconnected by π–π interactions to 2-D layer architectures. Elemental analysis, XRD, IR, TG and EPR spectra have been carried out and discussed.

Keywords:

• H3btc
• Bis(1,2,4-triazol-1-yl)methane
• Bis(1,2,4-triazol-1-yl)ethane
• Bis(1,2,4-triazol-1-yl)propane
• EPR spectra

Supplementary material

CCDC-1 918157, CCDC-2 91858, and CCDC-3 91859 contain the Supplementary crystallographic data for this study. These data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Centre, 12 Union Road, Cambridge CB21EZ, UK; Fax: [phone]; or E-mail: [email protected]).

Acknowledgment

This work was financially supported by the Natural Science Foundation of Tianjin (No. 12JCZDJC27600), P.R. China.