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首页> 外文期刊>Crystal growth & design >Reactive microporous rare-earth coordination polymers that exhibit single-crystal-to-single-crystal dehydration and rehydration
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Reactive microporous rare-earth coordination polymers that exhibit single-crystal-to-single-crystal dehydration and rehydration

机译：具有单晶至单晶脱水和复水作用的反应性微孔稀土配位聚合物

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摘要

Two isostructural coordination polymers of formula [Ln(2)(ADC)(3)(H2O)(6)]center dot 2H(2)O, (ADC = acetyledicarboxylato dianion, Ln(3+) = La3+ or Ce3+) have been prepared at room temperature. The structure is three-dimensional, possessing one-dimensional channels filled with lattice and coordinated water molecules. The presence of three water molecules in the coordination sphere of the metal creates a dense hydrogen-bonded network. The lattice water molecules were removed from the cerium compound at 100 T with retention of the structure. This transformation was also possible in a crystal-to-crystal manner. The structure of the dehydrated solid was determined and found to present only minor modifications compared to the parent structure. The departure of the coordinated water molecules is carried out in three steps, with retention of the structure up to 150 degrees C. Beyond this temperature, dehydration is accompanied by polymerization, due to the existence of an infinite chain of short acetylene-acetylene contacts.
机译：式[Ln（2）（ADC）（3）（H2O）（6）]中心点2H（2）O的两种同构配位聚合物（ADC =乙酰二羧基二阴离子，Ln（3+）= La3 +或Ce3 +）在室温下制备。该结构是三维结构，具有一维通道，其中充满了晶格和协调的水分子。在金属的配位球中三个水分子的存在产生了紧密的氢键网络。在保留结构的情况下，在100 T下从铈化合物中除去了晶格水分子。这种转变也可能以晶体间的方式进行。确定了脱水固体的结构，发现与母体结构相比仅存在较小的修饰。配位水分子的分离通过三个步骤进行，结构的保留高达150摄氏度。超过该温度，由于存在无限短的乙炔-乙炔接触链，脱水伴随聚合反应。

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