介晶席夫碱 N,N'-二-(4-癸氧基水杨醛基)-1',6'-二氨基己烷双核镧(III)配合物的合成与表征。
Homo dinuclear lanthanide(III) complexes of a mesogenic Schiff-base, N,N'-di-(4-decyloxysalicylidene)-1',6'-diaminohexane: synthesis and characterization.
机构信息
Department of Chemistry, Banaras Hindu University, Varanasi 221005, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1654-9. doi: 10.1016/j.saa.2011.05.030. Epub 2011 Jun 12.
A mesogenic Schiff-base, N,N'-di-(4-decyloxysalicylidene)-1',6'-diaminohexane, H2ddsdh (abbreviated as H2L2) that exhibits smectic-B (SmB) mesophase, was synthesized and its structure studied by elemental analysis, mass spectrometry, NMR & IR spectral techniques. The Schiff-base, H2L2, upon condensation with hydrated lanthanide(III) nitrates, yields LnIII complexes of the general composition Ln2(L2H2)3(NO3)42, where Ln=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Ho. IR and NMR spectral data imply a bi-dentate bonding of the Schiff-base in its zwitterionic form (as L2H2) to the LnIII ions through two phenolate oxygens. The POM and DSC studies reveal that none of the LnIII complexes exhibits mesomorphism. Fluorescence studies show that the TbIII complex displays characteristic metal-centered fluorescence (solution state).
一种介晶席夫碱，N，N'-二-（4-癸氧基水杨醛）-1'，6'-二氨基己烷，H2ddsdh（缩写为 H2L2），表现出向列-B（SmB）介晶相，通过元素分析、质谱、NMR 和 IR 光谱技术进行了合成和结构研究。席夫碱 H2L2，与水合镧（III）硝酸盐缩合，生成通式为[Ln2（L2H2）3（NO3）4]（NO3）2 的镧系元素 III 配合物，其中 Ln=La、Pr、Nd、Sm、Eu、Gd、Tb、Dy 和 Ho。IR 和 NMR 光谱数据表明，席夫碱在其两性离子形式（作为 L2H2）中通过两个酚氧基以双齿配位的方式与镧系元素 III 离子键合。POM 和 DSC 研究表明，没有任何镧系元素 III 配合物表现出介晶性。荧光研究表明，TbIII 配合物在溶液状态下显示出特征的金属中心荧光。
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