A metal-organic coordination compound, wherein the coordination compound comprises at least one divalent lanthanide coordinated by a cyclic organic ligand according to formula (1), wherein · i is larger than 3; and · n is equal to 1, 2, or 3; and · L for each occurrence is independently selected from - divalent cyclic organic groups that can be substituted and that are formed by removing two hydrogen atoms from an organic cyclic molecule that can be substituted, - arylenes, preferably 5- or 6-membered ring aromatic or heteroaromatic group, or - biradical fragments of (formula (AA)) and · X is independently selected for each occurrence from the group of (formula (BB)), · wherein R1 and R2 are hydrogen or any covalently bound substituents being identical or different in each occurrence; and · wherein R1 and/or R2 are at least in 3 occurrences not hydrogen, and · wherein two groups R2 can be covalently linked with each other, thereby forming a further cyclic element, it also being possible that two cyclic organic ligands of formula (1) are covalently linked with each other by one or two divalent linking groups which divalent linking groups are formed of one R1 of each of the two cyclic organic ligands of formula (1) that are covalently linked with each other.
金属有机配位化合物,其中该配位化合物至少包括一个二价
镧系元素,由根据式(1)的环状有机
配体配位,其中·i大于3;和·n等于1、2或3;和·每次出现的L独立地选择自-可以被取代的二价环状有机基团,并且由可以被取代的有机环状分子去除两个氢原子形成,-芳基,优选为5-或6-成员环芳香或杂芳基团,或-(式(
AA))的双自由基片段,和·X独立地为每次出现从(式(BB))的群中选择,·其中R1和R2是氢或在每次出现中相同或不同的任何共价结合的取代基;和·其中R1和/或R2至少在3次出现中不是氢,和·其中两个R2基团可以共价连接在一起,从而形成进一步的环元素,也可能是根据式(1)的两个环状有机
配体通过一个或两个二价连接基团共价连接在一起,这些二价连接基团由连接在一起的两个根据式(1)的环状有机
配体中的每一个的R1形成。