Host–vip interactions between the aromatic molecules benzene,toluene,aniline and nitrobenzene and the redox-active TCNQ-based metal–organic framework(MOF),Fe(TCNQ)(4,4’-bpy)(1)(TCNQ=7,7,8,8-tetracyanoquinodimetha...Host–vip interactions between the aromatic molecules benzene,toluene,aniline and nitrobenzene and the redox-active TCNQ-based metal–organic framework(MOF),Fe(TCNQ)(4,4’-bpy)(1)(TCNQ=7,7,8,8-tetracyanoquinodimethane),have been found to modulate spontaneous magnetization behaviours at low temperatures.An analogous MOF,Mn(TCNQ)(4,4’-bpy)(2)with isotropic Mn(II)ions as well as the two-dimensional compound Fe(TCNQ)(DMF)_(2)·2DMF(3·2DMF),were also prepared as models for studying the effects of single-ion magnetic anisotropy and structural distortion on spin canting.The results indicate vip-dependent long range magnetic ordering occurs at low temperatures,which correlates with the electrostatic and steric effects of the incorporated aromatic vips.展开更多
基金supported by the U.S.Department of Energy,Office of Basic Energy Sciences,Division of Materials Sciences and Engineering under Award DE-SC0012582.MFBR thanks Secretaria de Ciencia y Tecnologia del Distrito Federal(SECITI).The authors thank Dr John Bacsa for his helpful discussions and Mr Toby Woods for collecting some of the X-ray diffraction data.This research used resources of the Advanced Photon Source,a U.S.Department of Energy(DOE)Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No.DE-AC02-06CH11357ChemMatCARS Sector 15 is supported by the National Science Foundation under grant number NSF/CHE-1346572.
文摘Host–vip interactions between the aromatic molecules benzene,toluene,aniline and nitrobenzene and the redox-active TCNQ-based metal–organic framework(MOF),Fe(TCNQ)(4,4’-bpy)(1)(TCNQ=7,7,8,8-tetracyanoquinodimethane),have been found to modulate spontaneous magnetization behaviours at low temperatures.An analogous MOF,Mn(TCNQ)(4,4’-bpy)(2)with isotropic Mn(II)ions as well as the two-dimensional compound Fe(TCNQ)(DMF)_(2)·2DMF(3·2DMF),were also prepared as models for studying the effects of single-ion magnetic anisotropy and structural distortion on spin canting.The results indicate vip-dependent long range magnetic ordering occurs at low temperatures,which correlates with the electrostatic and steric effects of the incorporated aromatic vips.
