Issue 12, 2020

Polar layered coordination polymers incorporating triazacyclononane-triphosphonate metalloligands

Abstract

Reactions of metalloligands MIII(notpH3) (M = Fe, Co and notpH6 = 1,4,7-triazacyclononane-1,4,7-triyl-tris(methylenephosphonic acid)) with Zn(OAc)2 under hydrothermal conditions resulted in new metal phosphonates Zn2Fe(notp)Cl(H2O) (1) and ZnCo(notpH)(H2O)·2H2O (2). They crystallize in polar space groups P63 (for 1) and Pca21 (for 2), respectively, and exhibit layer structures in which the inorganic layers are separated by the organic groups of the notp ligands. However, the layer topologies of the two compounds are quite different. In 1, the layer contains 6-membered rings composed of one {FeN3O3} octahedron, one {Zn1O3Cl}, one {Zn2O4} and three {PO3C} tetrahedra via corner-sharing connections, while in 2, the layer contains 10-membered rings composed of two {CoO3N3} octahedra, three {ZnO4} and five {PO3C} tetrahedra via vertex-sharing connections. Dielectric measurements on single crystals of 2 confirmed the presence of high dielectric anisotropy. Proton conductivity measurements revealed that the proton conduction is more favourable in 2 due to the presence of a continuous hydrogen bond network in this compound.

Graphical abstract: Polar layered coordination polymers incorporating triazacyclononane-triphosphonate metalloligands

Supplementary files

Article information

Article type
Paper
Submitted
30 сеп 2019
Accepted
08 ное 2019
First published
11 ное 2019

Dalton Trans., 2020,49, 3758-3765

Polar layered coordination polymers incorporating triazacyclononane-triphosphonate metalloligands

S. Liu, S. Bao and L. Zheng, Dalton Trans., 2020, 49, 3758 DOI: 10.1039/C9DT03858B

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