我们报告了由一类新的基于有机基团的配体,即多氯代三苯甲基(PTM)基团建立的两条新的金属自由基链的合成,晶体结构和磁性。两种新的一维配位聚合物的晶体结构,[Cu 2(PTMDC)2(py)5(EtOH)]·3EtOH(1)和[Co 2(PTMDC)2(DMF)2(H 2 O)6 ]·5DMF (2)(其中PTMDC是被两个羧基官能化的PTM自由基),显示相似的链状结构,其中每个PTMDC自由基都连接两个Cu(II)或Co(II)金属离子。因此,从磁性的角度来看,两种结构都描述了基于PTMDC-M(II)单元的磁链模型。在该手稿中,已经确定了金属离子与桥接PTM自由基之间的磁交换耦合常数。在这两种情况下,磁化率的温度依赖性都揭示了PTMDC自由基与Cu(II)(J / k B = -42 K)和Co(II)(J / k B = -14.6 K)之间的反铁磁交换耦合常数。基于交换哈密顿量H =
A Robust Nanocontainer Based on a Pure Organic Free Radical
摘要:
A new pure organic paramagnetic porous molecular material, which combines hydrophilic windows with large hydrophobic nanocontainers, is shown to be stable even in absence of solvent guest molecules.
Inert Carbon Free Radicals. 11. Synthesis and Magnetic Behavior of (4,4'-Dicarboxytridecachlorotriphenyl)methyl Radical and Related Results
作者:V. M. Domingo、J. Castaner、J. Riera、A. Labarta
DOI:10.1021/jo00088a052
日期:1994.5
The syntheses of the title radical, its dimethyl ester, and 4H,4'H-(tridecachlorotriphenyl)methyl radical are described. Their ESR spectra and magnetic susceptibilities are reported and commented upon.