Ordered Matter Science Research Center, Southeast University, Nanjing 21189, PR China.
J Am Chem Soc. 2010 Jun 2;132(21):7300-2. doi: 10.1021/ja102573h.
Compound H(2)dbco x [Cl(3)] x [CuCl(3)(H(2)O)(2)] x H(2)O undergoes a sharp dielectric anomaly and a paraelectric-to-ferroelectric phase transition at approximately -23 degrees C with a spontaneous polarization of 1.04 microC cm(-2), being the first molecular metal coordination compound ferroelectrics with a large dielectric response involving a 2 orders of magnitude enhancement and distinct Curie phase transition point. This work has proved an effective way for exploration of new ferroelectrics based on a five-coordinated divalent metal through the combination of crystal engineering and Landau phase transition theory.
化合物 H(2)dbco x [Cl(3)] x [CuCl(3)(H(2)O)(2)] x H(2)O 在约-23°C 时发生急剧介电异常和弛豫铁电相变，自发极化强度为 1.04 μC cm(-2)，是首例具有大介电响应的分子金属配位化合物铁电体，介电增强达 2 个数量级，居里相变点明显。本工作通过晶体工程和朗道相变理论相结合，为探索基于五配位二价金属的新型铁电体提供了一条有效途径。
