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A Family of Heterobimetallic Cubes Shows Spin‐Crossover Behaviour Near Room Temperature
Author(s) -
Hardy Matthias,
Tessarolo Jacopo,
Holstein Julian J.,
Struch Niklas,
Wagner Norbert,
Weisbarth Ralf,
Engeser Marianne,
Beck Johannes,
Horiuchi Shinnosuke,
Clever Guido H.,
Lützen Arne
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202108792
Subject(s) - spin crossover , chemistry , transition metal , crystallography , spin transition , aldehyde , imidazole , aniline , stereochemistry , organic chemistry , catalysis
Abstract Using 4‐(4′‐pyridyl)aniline as a simple organic building block in combination with three different aldehyde components together with metal(II) salts gave three different Fe 8 Pt 6 ‐cubes and their corresponding Zn 8 Pt 6 analogues by employing the subcomponent self‐assembly approach. Whereas the use of zinc(II) salts gave rise to diamagnetic cages, iron(II) salts yielded metallosupramolecular cages that show spin‐crossover behaviour in solution. The spin‐transition temperature T 1/2 depends on the incorporated aldehyde component, giving a construction kit for the deliberate synthesis of spin‐crossover compounds with tailored transition properties. Incorporation of 4‐thiazolecarbaldehyde or N ‐methyl‐2‐imidazole‐carbaldehyde yielded cages that undergo spin‐crossover around room temperature whereas the cage obtained using 1 H ‐4‐imidazolecarbaldehyde shows a spin‐transition at low temperatures. Three new structures were characterized by synchrotron X‐ray diffraction and all structures were characterized by mass spectrometry, NMR and UV/Vis spectroscopy.