Magnetic behaviors of cobalt(II) complex chains connected with a 1,3-phenylenebis(4-pyridylcarbene) magnetic coupler

Polymeric Co complexes bridged with photoresponsive magnetic coupler, D2py2, were prepared. After irradiation of the microcrystal of [(Co(hfnip)2)2(D2py2)]n, the complex exhibited a slow magnetic relaxation with Ueff/kB = 129 K, and a temperature-dependent hysteresis loop with Hc = 9 kOe at 1.9 K.