Intercalation of cobalt(II)-tetraphenylporphine tetrasulfonate complex in magnetic NiFe-layered double hydroxide

Hybrid magnetic multilayers have been synthesized by means of intercalation of [5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrinato]cobalt(II) (CoTPPS) complex in the interlayer space of a (NiFeIII)-Fe-II layered double hydroxide (LDH), through anion-exchange reaction. A sebacate (-OOC-(CH2)(8)-COO-) intercalated NiFe-LDH have been used as precursor, facilitating the anion exchange reaction, thus permitting the inclusion of a paramagnetic macrocycle inside the ferrimagnetic NiFe-LDH layers. The material has been characterized by XRD, FT-IR, SEM, SQUID and ESR. The T-c for the hybrid NiFe-CoTPPS, ca. 11-12 K, is very close to that shown by the precursor, despite that the intercalation of the complex promotes an expansion in the basal space from 15.4 to 22.4 angstrom. (C) 2012 Elsevier Ltd. All rights reserved.