Issue 32, 2019

An unprecedented hetero-bimetallic three-dimensional spin crossover coordination polymer based on the tetrahedral [Hg(SeCN)4]2− building block

Abstract

Self-assembly of octahedral FeII ions, trans-1,2-bis(4-pyridyl)ethane (bpe) bridging ligands and [Hg(XCN)4]2− (X = S (1), Se (2)) tetrahedral building blocks has afforded a new type of hetero-bimetallic HgII–FeII spin-crossover (SCO) 3D 6,4-connected coordination polymer (CP) formulated {Fe(bpe)[Hg(XCN)4]}n. For X = S (1), the ligand field is close to the crossing point but 1 remains paramagnetic over all temperatures. In contrast, for X = Se (2) the complex undergoes complete thermal induced SCO behaviour centred at T1/2 = 107.8 K and complete photoconversion of the low spin state into a metastable high-spin state (LIESST effect) with TLIESST = 66.7 K. The current results provide a new route for the design and synthesis of new SCO functional materials with non-Hoffmann-type structures.

Graphical abstract: An unprecedented hetero-bimetallic three-dimensional spin crossover coordination polymer based on the tetrahedral [Hg(SeCN)4]2− building block

Supplementary files

Article information

Article type
Communication
Submitted
14 Feb 2019
Accepted
07 Mar 2019
First published
07 Mar 2019

Chem. Commun., 2019,55, 4607-4610

An unprecedented hetero-bimetallic three-dimensional spin crossover coordination polymer based on the tetrahedral [Hg(SeCN)4]2− building block

W. Lan, F. J. Valverde-Muñoz, X. Hao, Y. Dou, M. C. Muñoz, Z. Zhou, H. Liu, Q. Liu, J. A. Real and D. Zhang, Chem. Commun., 2019, 55, 4607 DOI: 10.1039/C9CC01291E

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