当前位置: X-MOL 学术Phys. Status Solidi. Rapid Res. Lett. › 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.)
The Role of Covalent Functionalization in the Thermal Stability and Decomposition of Hybrid Layered Hydroxides
Physica Status Solidi-Rapid Research Letters ( IF 2.8 ) Pub Date : 2020-09-16 , DOI: 10.1002/pssr.202000380
Víctor Oestreicher 1 , Gonzalo Abellán 1, 2 , Eugenio Coronado 1
Affiliation  

The room temperature synthesis of two Co‐based hybrid layered hydroxides containing the same organic ligand (suberate [Sub]), one connected through purely electrostatic interactions (CoAl layered double hydroxide [LDH]), and the other covalently functionalized (α‐CoII simonkolleite phase) has been carried out. The magnetic properties exhibit an acute difference in the magnetization temperatures (from ≈10 K for the CoAl‐LDH to ≈55 K for the α‐CoII). Moreover, the role of the covalent functionalization in the thermal stability and the decomposition has been investigated by a forefront characterization tool consisting of thermogravimetric analysis coupled with gas chromatography and mass spectrometry (TG–GC–MS). The LDH exhibits a higher thermal stability of ≈50 ºC with broad mass loss steps, whereas the water molecules interact stronger with the α‐CoII(Sub) hybrid, suggesting a higher confinement in the interlayer space. Interestingly, at higher temperatures (>400 ºC), the α‐CoII(Sub) gives rise to the selective formation of cycloheptanone, in contrast to the LDH phase leading to different carbonyl containing compounds. These findings offer new fundamental insights into the thermal behavior of hybrid materials based on layered hydroxides, highlighting the important role of covalent functionalization in its properties.

中文翻译:

共价官能化在杂化层状氢氧化物热稳定性和分解中的作用

两个基于共同混合的室温下合成层叠含有相同的有机配体(辛二[子]),一个通过纯粹的静电相互作用连接(煤层状双氢氧化物[LDH])的氢氧化物,其它共价官能化(α-钴II simonkolleite相)。的磁特性显示在磁化温度急性差(从≈10K为煤LDH到≈55K为α钴II)。此外,共价官能化在热稳定性和分解中的作用已通过最前沿的表征工具进行了研究,该工具包括热重分析,气相色谱和质谱分析(TG-GC-MS)。所述LDH显示出≈50ºC的具有广泛的质量损失的步骤的更高的热稳定性,而水分子相互作用与α -钴更强II(子)混合,这表明,在层间空间中的更高限制。有趣的是,在较高的温度(> 400℃)中,α -钴II与导致不同的含羰基化合物的LDH相相比,(Sub)引起环庚酮的选择性形成。这些发现为基于层状氢氧化物的杂化材料的热行为提供了新的基本见解,突出了共价官能化在其性能中的重要作用。
更新日期:2020-09-16
down
wechat
bug