TY - JOUR
T1 - Synthesis, crystal structures and magnetic properties of picolinate-bridged copper(II) chains
AU - Jornet-Mollá, Verónica
AU - Martín-Mezquita, Carlos
AU - Duan, Yan
AU - Giménez-Saiz, Carlos
AU - Romero, Francisco M.
N1 - Funding Information:
The present work has been supported by the Spanish MINECO [CTQ2014-52758-P], [MAT2014-56143-R]; Generalitat Valenciana [PrometeoII/2014/076].
Publisher Copyright:
© 2018 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2018/3/4
Y1 - 2018/3/4
N2 - The paper reports the synthesis, crystal structures, and magnetic properties of two copper(II) coordination polymers, Cu2(L1)4 (1) and Cu3(L2)6 (2), based on rigid ethynylene-bridged ditopic ligands containing one picolinate subunit (L1 = 5-(pyridin-3-ylethynyl)picolinate anion; L2 = 5-((4-(methoxycarbonyl)phenyl)ethynyl)picolinate anion). Both 1 and 2 have a chain structure. In 1, the repeating unit in the chain is a doubly bridged picolinate dicopper(II) complex, whereas 2 is built upon trimeric units where the Cu2+ ions are also connected by double picolinate bridges. Both compounds exhibit antiferromagnetic interactions in the solid state. The magnetic properties of 1 and 2 were analyzed in terms of simple dimer (H = –2JSCuSCu) and linear trimer [H = –2J(SCu1SCu2+SCu2SCu1)] models, respectively, neglecting the intermolecular interactions between the polynuclear units. The values of the exchange coupling parameters were J = −0.59 and J = –0.30 cm−1 for 1 and 2, respectively.
AB - The paper reports the synthesis, crystal structures, and magnetic properties of two copper(II) coordination polymers, Cu2(L1)4 (1) and Cu3(L2)6 (2), based on rigid ethynylene-bridged ditopic ligands containing one picolinate subunit (L1 = 5-(pyridin-3-ylethynyl)picolinate anion; L2 = 5-((4-(methoxycarbonyl)phenyl)ethynyl)picolinate anion). Both 1 and 2 have a chain structure. In 1, the repeating unit in the chain is a doubly bridged picolinate dicopper(II) complex, whereas 2 is built upon trimeric units where the Cu2+ ions are also connected by double picolinate bridges. Both compounds exhibit antiferromagnetic interactions in the solid state. The magnetic properties of 1 and 2 were analyzed in terms of simple dimer (H = –2JSCuSCu) and linear trimer [H = –2J(SCu1SCu2+SCu2SCu1)] models, respectively, neglecting the intermolecular interactions between the polynuclear units. The values of the exchange coupling parameters were J = −0.59 and J = –0.30 cm−1 for 1 and 2, respectively.
KW - Magnetic properties
KW - copper(II)
KW - metal–organic frameworks
UR - http://www.scopus.com/inward/record.url?scp=85042087389&partnerID=8YFLogxK
U2 - 10.1080/00958972.2018.1437267
DO - 10.1080/00958972.2018.1437267
M3 - Article
AN - SCOPUS:85042087389
SN - 0095-8972
VL - 71
SP - 644
EP - 656
JO - Journal of Coordination Chemistry
JF - Journal of Coordination Chemistry
IS - 5
ER -