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 NiIIFeIII 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 Tc 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 Å.

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 NiIIFeIII 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 Tc 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 Å.Figure optionsDownload as PowerPoint slideHighlights
► A paramagnetic cobalt porphyrin complex has been intercalated in a ferrimagnetic NiFe-LDH host.
► The physical properties have been characterized by means of ESR and magnetic measurements.
► CoTPPS units are quite well isolated in the interlamellar space of the NiFe-LDH.
► The critical temperature of the hybrid remains intact despite the increase in the basal space.
► NiFe–CoTPPS hybrid behaves as a spin glass-like system.