Issue 21, 2014

Synthesis, crystal structures, and luminescence properties of seven tripodal imidazole-based Zn/Cd(ii) coordination polymers induced by tricarboxylates

Abstract

Seven tripodal imidazole-based metal coordination polymers, [Zn3(L1)2(tib)2]n·(H2O)4n (1), [Cd3(L1)2(tib)2(H2O)2]n·(H2O)6n (2), [Zn3(L2)2(tib)2]n·(H2O)n (3), [Cd3(L2)2(tib)2]n·(H2O)6n (4), [Zn3(L3)2(tib)2]n·(H2O)4.5n (5), [Zn2(HL3)2(tib)2]n·(H2O)n (6), and [Cd3(L3)2(tib)2(H2O)2]n·(H2O)4n (7), with different structures have been designed and prepared based on the hydrothermal reaction between Zn(OAc)2·2H2O or Cd(OAc)2·2H2O and tib ligands in the presence of three asymmetric semi-rigid V-shaped tricarboxylate ligands, H3L1–3, where tib, H3L1, H3L2, and H3L3 ligands represent 1,3,5-tris(1-imidazolyl)benzene, 3-(2-carboxyphenoxy)phthalic acid, 4-(2-carboxyphenoxy)phthalic acid, and 3-(4-carboxyphenoxy)phthalic acid, respectively. All of these compounds, sharing three-dimensional (3D) networks, have been clearly identified by single crystal X-ray diffraction analysis. Among complexes 1–7 (except 6), the common 3D skeletons are composed of tib N-donor ligands bridging two-dimensional (2D) sheets made of L1–3 ligands and metal ions. Compound 6 also exhibits a 3D network constructed from partly deprotonated L3 ligands attached to right- and left-helices made of tib ligands and Zn ions. In these compounds, the diversity of the tib ligand-based metal building units is tuned by the molecular conformation of the tricarboxylates and the coordination geometry of the metal ion. In addition, the thermal stability and emission spectroscopy for the series of seven complexes have also been investigated.

Graphical abstract: Synthesis, crystal structures, and luminescence properties of seven tripodal imidazole-based Zn/Cd(ii) coordination polymers induced by tricarboxylates

Supplementary files

Article information

Article type
Paper
Submitted
27 Jan 2014
Accepted
26 Feb 2014
First published
26 Feb 2014

CrystEngComm, 2014,16, 4554-4561

Author version available

Synthesis, crystal structures, and luminescence properties of seven tripodal imidazole-based Zn/Cd(II) coordination polymers induced by tricarboxylates

W. Yang, C. Wang, Q. Ma, C. Liu, H. Wang and J. Jiang, CrystEngComm, 2014, 16, 4554 DOI: 10.1039/C4CE00212A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements