[Zurück]

D. Müller, C. Knoll, M. Seifried, G. Giester, Jan Welch, M. Reissner, P. Weinberger:
"2^nd generation Hofmann-type networks - Introducing multifunctionality into spin-switchable frameworks";
Vortrag: 43rd International Conference on Coordination Chemistry, Sendai (Japan); 30.07.2018 - 04.08.2018; in: "ICCC2018 Sendai Japan", Science Council of Japan (Hrg.); (2018), S. 14.

Spin-switchable Hofmann-type Fe(II)-networks based on M(CN)₄ (M=Ni, Pd, Pt) as square planar building block and a ditopic N-heterocycle as e.g. pyrazine, 4,4´-bipyridine,... combine magnetism with host-guest chemistry.1 A second generation of extended Hofmann-type networks was obtained by introduction of an acetylene-unit in the M-CN bond, resulting in metallated tetrakis(cyanoacetylides) as expanded building blocks. Thereby, not only was a notable increase in pore volume of about 120% achieved, but the polarity of the PCP´s inner surface could also be modified. For the growth of single-crystals a novel electrolytic crystallization approach was developed, providing the necessary Fe(II)-ions by anodic oxidation of Fe in a non-aqueous medium. In the present contribution the second generation of bimetallic Fe-M, (M=Ni, Pd, Pt) Hofmann-type networks is presented and discussed with regard to its structural, magnetic and spectroscopic properties. A special emphasis is placed on the host-guest chemistry of the networks, as governed by the extended pores bearing alkyne-moieties.

Hofmann-type networks; iron(II); spin crossover

https://publik.tuwien.ac.at/files/publik_271189.pdf