scholarly journals Low pH constructed Co(ii) and Ni(ii) 1D coordination polymers based on Cα-substituted analogues of zoledronic acid: structural characterization, and spectroscopic and magnetic properties

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31497-31510 ◽  
Author(s):  
Tomasz Rojek ◽  
Waldemar Goldeman ◽  
Katarzyna Ślepokura ◽  
Marek Duczmal ◽  
Agnieszka Wojciechowska ◽  
...  

1D Co(ii)/Ni(ii) coordination polymers with alternating antiferromagnetic–ferromagnetic exchange interactions between metal centers propagated through double (–O–P–O–)2 bridges.

Polyhedron ◽  
2017 ◽  
Vol 138 ◽  
pp. 177-184 ◽  
Author(s):  
Febee R. Louka ◽  
Salah S. Massoud ◽  
Tamim K. Haq ◽  
Masayuki Koikawa ◽  
Masahiro Mikuriya ◽  
...  

1997 ◽  
Vol 275 (1-2) ◽  
pp. 79-84 ◽  
Author(s):  
Juan J. Borrás-Almenar ◽  
Juan M. Clemente-Juan ◽  
Eugenio Coronado ◽  
Francesc Lloret

2006 ◽  
Vol 20 (28) ◽  
pp. 1803-1807 ◽  
Author(s):  
ALI BAYRI

This study reports the magnetic properties of newly reported copper(II) complex of the antiprine Schiff base of 3-formylsalicylic acid. Although the separation of Cu centers and the bridge angle is not known, from the magnetic analysis it is suggested that there are strong antiferromagnetic interactions between the metal centers in dimeric units. It is also suggested that the system becomes demagnetized below a certain temperature.


CrystEngComm ◽  
2014 ◽  
Vol 16 (22) ◽  
pp. 4816-4833 ◽  
Author(s):  
Bharat Kumar Tripuramallu ◽  
Paulami Manna ◽  
Samar K. Das

The linker coordination angles observed in the crystal structures of a new series of coordination polymers of flexible linkers, are correlated with their dimensionality and topology.


2019 ◽  
Vol 5 (2) ◽  
pp. 35 ◽  
Author(s):  
Constantinos G. Efthymiou ◽  
Áine Ní Fhuaráin ◽  
Júlia Mayans ◽  
Anastasios Tasiopoulos ◽  
Spyros P. Perlepes ◽  
...  

The synthesis, structural characterization and magnetic study of novel CoII/4f and CoII/YIII clusters are described. In particular, the initial employment of di-2-pyridyl ketone, (py)2CO, in mixed metal Co/4f chemistry, provided access to four triangular clusters, [CoII2MIII{(py)2C(OEt)(O)}4(NO3)(H2O)]2[M(NO3)5](ClO4)2 (M = Gd, 1; Dy, 2; Tb, 3; Y, 4), where (py)2C(OEt)(O)− is the monoanion of the hemiketal form of (py)2CO. Clusters 1–4 are the first reported Co/4f (1–3) and Co/Y (4) species bearing (py)2CO or its derivatives, despite the fact that over 200 metal clusters bearing this ligand have been reported so far. Variable-temperature, solid-state dc and ac magnetic susceptibility studies were carried out on 1–4 and revealed the presence of weak ferromagnetic exchange interactions between the metal ions (JCo-Co = +1.3 and +0.40 cm−1 in 1 and 4, respectively; JCo-Gd = +0.09 cm−1 in 1). The ac susceptibility studies on 2 revealed nonzero, weak out-of-phase (χ’’M) signals below ~5 K.


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