Modulation of Mn.sup.3+./sup. spin state by guest molecule inclusion

0539171 - FZÚ 2021 RIV CH eng J - Journal Article
Kühne, Irina A. - Esien, K. - Gavin, L.C. - Muller-Bunz, H. - Felton, S. - Morgan, G.G.
Modulation of Mn³⁺ spin state by guest molecule inclusion.
Molecules. Roč. 25, č. 23 (2020), s. 1-13, č. článku 5603. E-ISSN 1420-3049
Institutional support: RVO:68378271
Keywords : spin crossover * Mn3+ * Schiff base * hexadentate * supramolecular * guest inclusion
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.412, year: 2020
Method of publishing: Open access

Spin state preferences for a cationic Mn3+ chelate complex in four different crystal lattices are investigated by crystallography and SQUID magnetometry. The [MnL1]+ complex cation was prepared by complexation of Mn3+ to the Schiff base chelate formed from condensation of 4-methoxysalicylaldehyde and 1,2-bis(3-aminopropylamino)ethane. The cation was crystallized separately with three polyatomic counterions and in one case was found to cocrystallize with a percentage of unreacted 4-methoxysalicylaldehyde starting material. The spin state preferences of the four resultant complexes [MnL1]CF3SO3·xH2O, (1), [MnL1]PF6·xH2O, (2), [MnL1]PF6·xsal·xH2O, (2b), and [MnL1]BPh4, (3), were dependent on their ability to form strong intermolecular interactions. Complexes (1) and (2), which formed hydrogen bonds between [MnL1]+, lattice water and in one case also with counterion, showed an incomplete thermal spin crossover over the temperature range 5–300 K.
Permanent Link: http://hdl.handle.net/11104/0316872