Reactions in water between lanthanide chlorides and the disodium salt of 2-hydroxyterephthalic acid (H₂hbdc) lead to six families of lanthanide-based coordination polymers depending on the lanthanide ion and the crystal growth method. Compounds that constitute family F1 have the general chemical formula [Ln(Hhbdc)(hbdc)·9H₂O]_∞ with Ln = La–Nd and have been obtained by slow evaporation. [Ln₂(hbdc)₃(H₂O)₆·4H₂O]_∞ with Ln = Sm–Eu constitute family F2 and have been obtained by solvothermal synthesis. Family F3 includes compounds, obtained by a solvothermal method, with the general chemical formula [Ln₂(hbdc)₃(H₂O)₄·4H₂O]_∞ with Ln = Ho–Lu plus Y and compounds obtained by slow diffusion through gels with Ln = Eu–Tb. [Ln(Hhbdc)(hbdc)(H₂O)₃·H₂O]_∞ with Ln = Tb–Dy have been obtained by solvothermal methods and constitute family F4. [Gd₂(hbdc)₃(H₂O)₈·6H₂O]_∞ (F5) has been obtained by slow evaporation. The last family (F6) includes compounds with the general chemical formula [Ln₂(hbdc)₃(H₂O)₈·2H₂O]_∞ with Ln = Nd–Tb that have been obtained by slow diffusion through gel media. Gd-Based micro-crystalline powders can be obtained by direct mixing of aqueous solutions of Gd³⁺ and hbdc²⁻. Unexpectedly, the micro-crystalline powder belongs to F5 when the lanthanide solution is added to the ligand one and to F6 when the opposite occurs. This phenomenon is also observed for the Tb- and/or Eu-based heterolanthanide coordination polymers. Their optical properties have been studied in detail.

中文翻译：

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羟基对苯二甲酸与镧系元素的分子合金：多功能系统

镧系元素氯化物与2-羟基对苯二甲酸二钠盐（H ₂ hbdc）在水中的反应取决于镧系元素离子和晶体生长方法，导致六族基于镧系元素的配位聚合物。组成族F1的化合物的化学通式为[Ln（Hhbdc）（hbdc）·9H ₂ O] _∞，Ln = La–Nd，是通过缓慢蒸发获得的。具有Ln = Sm–Eu的[Ln ₂（hbdc）₃（H ₂ O）₆ ·4H ₂ O] _∞构成族F2，并已通过溶剂热合成获得。F3家庭包括通过溶剂热法获得的，化学通式为[Ln ₂（hbdc）₃（H ₂ O）₄ ·4H ₂ O] _∞且Ln = Ho-Lu加Y的化合物，以及通过在凝胶中缓慢扩散而获得的化合物Ln = Eu–Tb。[Ln（Hhbdc）（hbdc）（H ₂ O）₃ ·H ₂ O] _∞（Ln = Tb–Dy）已通过溶剂热法获得，并构成族F4。[Gd ₂（hbdc）₃（H ₂ O）₈ ·6H ₂ O] _∞（F5）是通过缓慢蒸发获得的。最后一个族（F6）包括通式为[Ln ₂（hbdc）₃（H ₂ O）₈ ·2H ₂ O] _∞的化合物，其中Ln = Nd–Tb是通过在凝胶介质中缓慢扩散而获得的。可以通过直接混合Gd ³⁺和hbdc ^2-的水溶液来获得基于Gd的微晶粉末。出乎意料的是，将镧系元素溶液添加到配体1和F6中时，微晶粉末属于F5当相反的情况发生时。对于基于Tb和/或Eu的杂镧系配位聚合物也观察到了这种现象。已经对其光学性质进行了详细研究。