Magnetic Behavior Control in Niccolite Structural Metal Formate Frameworks [NH2(CH3)(2)][(FeMII)-M-III(HCOO)(6)] (M = Fe, Mn, and Co) by Varying the Divalent Metal Ions

作者：Zhao, Jiong-Peng; Hu, Bo-Wen; Lloret, Francesc; Tao, Jun; Yang, Qian; Zhang, Xiao-Feng; Bu, Xian-He^*

来源：Inorganic Chemistry, 2010, 49(22): 10390-10399.

DOI：10.1021/ic1014863

• BOND-VALENCE PARAMETERS
• CRYSTAL-STRUCTURE
• 3-DIMENSIONAL FRAMEWORK
• WEAK FERROMAGNETISM
• LAYER COMPOUNDS
• SPIN-CROSSOVER
• PRUSSIAN BLUE
• NEEL N
• REVERSAL
• SYSTEMS

By changing template cation but introducing trivalent iron ions in the known niccolite structural metal formate frameworks, three complexes formulated [NH2(CH3)(2)][(FeMII)-M-III(HCOO)(6)] (M = Fe for 1, Mn for 2, and Co for 3) were synthesized and magnetically characterized. The variation in the compositions of the complexes leads to three different complexes: mixed-valent complex 1, heterometallic but with the same spin state complex 2, and heterometallic heterospin complex 3. The magnetic behaviors are closely related to the divalent metal ions used. Complex 1 exhibits negative magnetization assigned as Neel N-Type ferrimagnet, with an asymmetric magnetization reversal in the hysteresis loop, and complex 2 is an anliferromagnet with small spin canting (alpha(canting) approximate to 0.06 degrees and T-canting = 35 K), while complex 3 is a ferrimagnet with T-N = 32 K.

• 出版日期2010-11-15
• 单位厦门大学; 南开大学