Detailed magnetic study on the formato-bridged MOFs with anion-tunable magnetic properties

Detailed studies of the structures, magnetic properties and photodimerization of a series of formato-bridged MOFs with the general formula M2(HCOO)3(4,4′-bpe)3(H2O)3(X) (4,4′-bpe = 4,4′-bipyridylethylene, M = Mn (1-X-), X- = ClO4-, NO3-, BF4-, I-, Br-; M = Co (2-X-), X- = ClO4-, NO3-; M = Zn (3-X-), X- = NO3-) were reported. Careful magnetic measurements on an oriented single crystal of 1-ClO4- determined the spin-flop magnetic phase diagram and some intrinsic parameters, such as the intralayer coupling J, the anisotropy field HA and the exchange field HE. Different anions can remarkably tune the magnetic properties of 1-X-, especially the critical fields of the spin-flop transition. Compound 2-ClO4- remained paramagnetic down to 2 K.

Detailed studies of the structures, magnetic properties and photodimerization of a series of formato-bridged MOFs with the general formula M2(HCOO)3(4,4′-bpe)3(H20)3(X) (4,4′-bpe = 4,4′-bipyridylethylene, M = Mn (1-X^-), X^- = C104, NO3, BF4, I^-, Br^-; M = Co (2-X^-), X^- = C1O^-4, NO^-3; M = Zn (3-X^-), X^- = NO^-3) were reported. Careful magnetic measurements on an oriented single crystal of 1-C1O^-4 determined the spin-flop magnetic phase diagram and some intrinsic parameters, such as the intralayer coupling J, the anisotropy field HA and the exchange field HE. Different anions can remarkably tune the magnetic properties of l-X-, especially the critical fields of the spin-flop transition. Compound 2-C104 remained paramagnetic down to 2 K.