TY - JOUR
T1 - Dodecanuclear [NiII8Ln4] clusters and rings of corner-sharing {NiII2Ln2} cubanes (Ln = Dy, Gd, Y}; Magnetic and Magnetothermal properties
AU - Tziotzi, Thomais G.
AU - Agapaki, Eleftheria
AU - Charkiolakis, Emmanouil Κ.
AU - Gracia, David
AU - Ubach I Cervera, Marc
AU - Dalgarno, Scott
AU - Evangelisti, Marco
AU - Brechin, Euan K.
AU - Milios, Constantinos J.
PY - 2025/3/21
Y1 - 2025/3/21
N2 - The solvothermal reaction of NiCl2·6H2O
with 1,3,5-tri(2-hydroxyethyl)-1,3,5-triazacyclohexane, LH3, and
Ln(OAc)3·4H2O in the presence of salicylaldehyde in MeOH
leads to the formation of the dodecanuclear isostructural species [NiII8Ln4(L′)8(OAc)4(OH)8(H2O)4]·xH2O
(Ln = Dy, x = 6 (1); Gd, x = 24 (2);
Y, x = 10 (3); L′ = the dianion of the Schiff-base
resulting from the reaction of salicylaldehyde and ethanolamine). The metallic
core of the clusters describes a ring of corner-sharing {Ni2Ln2}
cubanes assembled on a central, planar rectangular {Ln4} unit.
Magnetization studies conducted on complexes 1–3 demonstrate
the presence of dominant ferromagnetic exchange at low temperatures, which is
largely attributed to the Ni⋯Ni interactions. The significant
magnetocaloric effect observed in the Gd analogue has been assessed through
heat capacity and magnetization measurements.
AB - The solvothermal reaction of NiCl2·6H2O
with 1,3,5-tri(2-hydroxyethyl)-1,3,5-triazacyclohexane, LH3, and
Ln(OAc)3·4H2O in the presence of salicylaldehyde in MeOH
leads to the formation of the dodecanuclear isostructural species [NiII8Ln4(L′)8(OAc)4(OH)8(H2O)4]·xH2O
(Ln = Dy, x = 6 (1); Gd, x = 24 (2);
Y, x = 10 (3); L′ = the dianion of the Schiff-base
resulting from the reaction of salicylaldehyde and ethanolamine). The metallic
core of the clusters describes a ring of corner-sharing {Ni2Ln2}
cubanes assembled on a central, planar rectangular {Ln4} unit.
Magnetization studies conducted on complexes 1–3 demonstrate
the presence of dominant ferromagnetic exchange at low temperatures, which is
largely attributed to the Ni⋯Ni interactions. The significant
magnetocaloric effect observed in the Gd analogue has been assessed through
heat capacity and magnetization measurements.
UR - http://www.scopus.com/inward/record.url?scp=85218765804&partnerID=8YFLogxK
U2 - 10.1039/D5DT00175G
DO - 10.1039/D5DT00175G
M3 - Article
SN - 1477-9226
VL - 54
SP - 4664
EP - 4671
JO - Dalton Transactions
JF - Dalton Transactions
IS - 11
ER -