Trinuclear Mn~(III)-NC-Fe~(III)-CN-Mn~(III) Ferromagnetic System

摘要

Extended structures of magnetic centers linked by cyanides are of great importance in search of high-temperature ordering magnetic materials.Transition metal cyanides are generally employed to produce various 1D,2D and 3D magnetic structures.Magnetic properties of metallopor-phyrins coupled with numerous organic polynitrile bridges have been extensively studied by Miller et al.However,metalloporpyrin systems bridged by metallocyanides are unknown.Recently magnetic bimetallic coordination polymers containing metallocyanide bridges have been reviewed.The MA-CN-Mn-NC- linkages turned out to be very useful for designing high T_c complex-based magnets.Herein we describe the synthesis,characterization and temperature dependent magnetic study of new heterometallic trimer systems consisted of two cationic Mn(TPP)~+ centers connected by anionic Fe(CN)_6~(3-) or Pd(CN)_4~(2-),where TPP is a 5,10,15,20-tetraphenylporphine.