当前位置: X-MOL 学术Adv. Funct. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Layered Simple Hydroxides Functionalized by Fluorene‐Phosphonic Acids: Synthesis, Interface Theoretical Insights, and Magnetoelectric Effect
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2017-09-11 , DOI: 10.1002/adfm.201703576
Quentin Evrard 1 , Ziyad Chaker 1 , Mélissa Roger 2 , Charlotte M. Sevrain 2 , Emilie Delahaye 1 , Mathieu Gallart 1 , Pierre Gilliot 1 , Cédric Leuvrey 1 , Jean-Michel Rueff 3 , Pierre Rabu 1 , Carlo Massobrio 1 , Mauro Boero 1 , Alain Pautrat 3 , Paul-Alain Jaffrès 2 , Guido Ori 1 , Guillaume Rogez 1
Affiliation  

Copper‐ and cobalt‐based layered simple hydroxides (LSH) are successfully functionalized by a series of fluorene mono‐ and diphosphonic acids, using anionic exchange reactions and a preintercalation strategy. The lateral functionalization of the fluorene moieties has only little impact on the overall structure of the obtained layered hybrid materials but it influences the organization of the molecules within the interlamellar spacing. For bulky fluorene (9,9‐dioctyl derivative), luminescence is preserved when inserted into copper and cobalt hydroxydes, whereas it is completely quenched for the other fluorenes. Detailed characterization of the internal structure and chemical bonding properties for copper‐ and cobalt‐based hybrids is performed via ancillary experimental techniques. For the copper‐based LSH class, for which more elusive findings are found, first‐principles molecular dynamics simulations unravel the fundamental stabilizing role of the H‐bonding network promoted within the local environments of the fluorene mono‐ and diphosphonic acids. The cobalt series of compounds constitute a new class of hybrid magnets, with ordering temperatures ranging from 11.8 to 17.8 K and show a clear magnetoelectric effect. This effect appears above a threshold magnetic field, which is null below the magnetic ordering temperature, and it persists in the paramagnetic regime till about 110 K.

中文翻译:

氟膦酸官能化的分层简单氢氧化物:合成,界面理论的见解和磁电效应

基于铜和钴的层状简单氢氧化物(LSH)已通过一系列芴单膦酸和二膦酸使用阴离子交换反应和预插入策略成功地进行了功能化。芴部分的侧向官能化对所获得的层状杂化材料的整体结构影响很小,但是它影响层间间距内分子的组织。对于大块芴(9,9-二辛基衍生物),当插入到铜和钴的羟基化物中时,发光得以保留,而对于其他芴则完全被淬灭。铜和钴基杂化物的内部结构和化学键合特性的详细表征是通过辅助实验技术进行的。对于铜基LSH类,由于发现了更多难以捉摸的发现,第一原理的分子动力学模拟揭示了在芴单和二膦酸的局部环境中促进的氢键网络的基本稳定作用。钴系列化合物构成一类新的混合磁体,其订购温度范围为11.8至17.8 K,并显示出清晰的磁电效应。该效应出现在阈值磁场之上,该阈值磁场在磁有序温度以下为零,并且在顺磁状态下一直持续到大约110K。其订购温度范围为11.8至17.8 K,并显示出清晰的磁电效应。该效应出现在阈值磁场之上,该阈值磁场在磁有序温度以下为零,并且在顺磁状态下一直持续到大约110K。其订购温度范围为11.8至17.8 K,并显示出清晰的磁电效应。该效应出现在阈值磁场之上,该阈值磁场在磁性有序温度以下为零,并且在顺磁状态下一直持续到大约110K。
更新日期:2017-09-11
down
wechat
bug