高相变温度的有机-无机类钙钛矿(C3N2H5)[Mg(HCOO)3]的制备及性能研究
PDF下载 (14453)赵冬梅,侯亚飞,李伟平 *.高相变温度的有机-无机类钙钛矿(C3N2H5)[Mg(HCOO)3]的制备及性能研究[J].宁波大学学报(理工版),2018,31(5):91-95.DOI:
ZHAO Dong-mei,HOU Ya-fei,LI Wei-ping *.Preparation and properties of organic-inorganic perovskite-like (C3N2H5)[Mg(HCOO)3] of high phase transition temperature[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(5):91-95.DOI:
| Title: | Preparation and properties of organic-inorganic perovskite-like (C3N2H5)[Mg(HCOO)3] of high phase transition temperature |
| 作者: | 赵冬梅, 侯亚飞, 李伟平 * |
| Author(s): | ZHAO Dong-mei, HOU Ya-fei, LI Wei-ping * |
| 关键词: | MOFs材料; 相变; 介电驰豫; 热稳定性 |
| Keywords: | MOFs materials; phase transition; dielectric relaxation; thermal stability |
| 分类号: | O437 |
| 文献标识码: | A |
| 摘要: | 运用自然蒸发静置的方式制备出一种新型的有机-无机杂化类钙钛矿晶体(C3N2H5)[Mg(HCOO)3] (ImMg). 这类材料的相变温度高达480.5K, 并且低于其熔点. ImMg的相变温度高于之前报道过的甲酸类钙钛矿的相变温度并且有明显的介电异常. ImMg属于ABX3型有机-无机杂化框架结构, B位的Mg原子和X位的HCOOH分子配位形成正八面体结构, A位的咪唑分子占据了[Mg(HCOO)3]-八面体框架形成的空隙位置. 并且在晶体结构中, A位的咪唑分子与X位的HCOOH分子形成氢键, 这与之前所报道的ImMn结构类似. 由于大量氢键的存在, ImMg的相转换温度和热稳定性显著提高. |
| Abstract: | In order to seek high phase transformation materials, a novel material (C3N2H5)[Mg(HCOO)3] (ImMg) is successfully prepared using conventional solution method. It is found that the phase transition temperature of ImMg is up to 480.5K, which has been the highest phase transition temperature for ABX3 (A=cation, imidazole, B=Metal ions, X=formate) so far. In addition, an obvious dielectric anomaly is observed, and the structure of ImMg turns out to be similar to that of ImMn. The octahedral metal ions (Mg2+) are linked by formate [(HCOO)3]- ligands to form cube-like cavities, which are occupied by imidazole cation (C3N2H5)+ through extensive hydrogen bonds in the framework. Owing to the existence of large amount of hydrogen bonds, the phase transition temperature and thermal stability of ImMg are greatly improved. |
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| 备注/Memo: | 收稿日期: 2018－03－23. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 国家自然科学基金（11574168）; 浙江省自然科学基金（LY14E030001）. 第一作者: 赵冬梅（1991－）, 女, 安徽阜阳人, 在读硕士研究生, 主要研究方向: 有机-无机杂化钙钛矿特性. E-mail: 1796961178@qq.com *通信作者: 李伟平（1977－）, 男, 浙江缙云人, 教授, 主要研究方向: 能源材料与器件. E-mail: liweiping@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
