| The utility of Ru-Ru bond dimers,which bear a unique electronic configuration and unique magnetic properties(S=3/2)in the assembly of extended network structures provides potential applications in the areas of photoelectric,magnetoelectricity and related materials physics.In the study of the metal-metal bonds,the syntheses of various functional complexes based Mu2n+(n = 4,5 and 6)building block,which n n 4 and 6 is homo-valent diruthenium,while n = 5 is mixed-valent diruthenium,has been an important subject,.Aditonally,carbonate CO32-,as a new object of the magnetic bridges,has become more and more intriguing as excellent models available to explore the fundamental magnetostructural correlations.So far,only a few of its polymeric topologies have been reported the Ru2(CO3)43-building block.In this paper,we report that the simultaneous assembly of Ru2(CO3)43-and transition metal ions,or rare earth ions in anaqueous solution leads to 15 diruthenium carbonate compounds including two one-dimensional structure and five two-dimensional structure M-Rue carbonate compounds,eight three-dimensional structure Ln-Ru2 carbonate compounds.Magnetic particle size effects have been characterized on the samples of HxK1-xM(Ru2(CO3)4·nH2O(M?Co,Ni,Mn)prepared by a ultrasonic method.The contents include three parts as follows:1.Seven novel series of 3 d-4d heterometallic carbonates were constructed from Ru2(CO3)43-paddle wheel precursors and transition metal ions in the presence of halogen,namely:K[Mn(H2O)4]2[Ru2(CO3)4Br2]-2H2O(1)H[{Mn(H2O)4}2Ru2(CO3)4Br2]-6H2O(2)[{Co(H2O)4}2Ru2(CO3)4(H2O)2]n·[{Co(H2O)4}2Ru2(CO3)4Br2]n·10.5nH2O(3)KM(H2O)6[M(H2O)2Ru2(CO3)4C12]4H20[M = Zn(4),Mn(5)]K2Li[Cu(H20)2Ru2(C03)4X2]5H20[X = Cl(6),Br(7)]Magnetic properties suggest complexes 1-3 and complexes 5-7 are ferromagnetic coupling between the Ru2 dimer and the M2+;complexes 4 show antiferromagnetic coupling between the Ru2 dimer and the Zn2+ ion;The best fit gives parameters:1:gRu=2.13,D=90.2 cm-1,?=3.82 K,R = 4.3×10-4;2:gRu=2.20,D = 90.7 cm-1,?=4.78 K,R= 1.3 ×10-4;3:gRu=2.18,gCo = 2.43,D = 71.0 cm-1,?=-8.33 K,R=2.3 ×10-4;4:gRu = 2.13,D=89.3 cm-1,?=-0.08 K,TIP=4.5×10-4,R=6×10-5;5:gRu=2.23,D= 84.2 cm-1,?=3.57K,TIP=1.8×10-4,R=6×10-5;6:gRu=2.24,gCu=2.33,D = 68.3 cm-1,??5.0 K,R=2×10-5;7:gRu=2.24,gcu= 2.27,D = 74.7cm-1,?=2.65,R= 8×10-5?2.Eight novel series of 4d-4f isomeric 3D network heterometallic carbonates were constructed from Ru2(CO3)43-paddle wheel precursors and rare earth ions,namely:{[Ln(H2O)5][Ru2(CO3)4]}·3H2O { Ln = Er(8),Ce(9),Nd(10),Sm(11),Eu(12),Gd(13),Tb(14),Dy(15)}.The magnetic studies show weak ferromagnetic interaction between the mixed-valent diruthenium unit and Ln3+ ions3.Particle size effects on magnetic properties of HxK1-xM(Ru2(CO3)4·nH2O(M = Co,Ni,Mn)prepared by a ultrasonic method.We report that the simultaneous assembly of cu2(CO3)43-and metal ions(M = Co,Mn,Ni)in anaqueous solution leading to the different sample particle sizes may be manipulated by the introduction of changng dispersing agents and the kinds of metal salts and/or temperature conditions.Magnetism measurement shows that the coercive field(Hc)and the remanent magnetization(Mr)are increased by reduced the particle sizes of these complexes. |
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