超高隔热性能的双层线性分子插层的新型层状有机-无机超晶格
New layered organic-inorganic superlattice with bilayer linear molecules for superhigh heat insulation
王纯 1刘洋 1朱仁龙 1周天培 1王铭浩 1程晗 1王文杰 2台晓琳 1汪琳 1陈龙 1林岳 1叶树集 3谢毅 4吴长征4
作者信息
- 1. Key Laboratory of Precision and Intelligent Chemistry,University of Science and Technology of China,Hefei 230026,China
- 2. National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China
- 3. Key Laboratory of Precision and Intelligent Chemistry,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China
- 4. Key Laboratory of Precision and Intelligent Chemistry,University of Science and Technology of China,Hefei 230026,China;Institute of Energy Hefei Comprehensive National Science Center,Hefei 230031,China
- 折叠
摘要
对层间分子排列的精确控制仍然面临重大挑战,其阻碍了新的热传递机制的发展和极端热性能的改善.在这项工作中,我们通过有序分子设计(TaS2-Cn,n=3,6,8,12),在层状无机材料中实现了一系列链长增长的烷基胺分子的限域插层,并首次揭示了由S-Ta-S无机亚晶格和双层有序线性分子组成的新型层状有机-无机超晶格.该超晶格材料具有超高的隔热性能,且随着层间插入的烷基链的长度增加,层间的烷基链变得更加有序和线性且扭转构象减少.此外,更线性和有序的分子构象降低了热导率.TaS2-C12的热导率为0.426 Wm-1 K-1,仅为原始TaS2晶体的三分之一.这种超晶格结构设计为开发新的有机-无机功能材料和探索超低热导率材料提供了新的研究思路.
Abstract
Layered inorganic materials provide an essen-tial platform for constructing new structural configurations of materials with exceptional properties.However,precise con-trol over the interlayer molecular arrangement remains a significant challenge,impeding in-depth exploration in phy-sics and chemistry realm.Herein,we demonstrated a new layered organic-inorganic superlattice composed of a S-Ta-S inorganic lattice and bilayer linear molecules,providing su-perhigh heat insulation.A series of interlayer-confined inter-calations of alkylamines with increasing chain length in the layered inorganic materials were achieved through precisely ordered molecule design(TaS2-Cn,n=3,6,8,12).Systematic spectral analysis reveals that as the length of the intercalated alkyl chain increases,the alkyl chain between layers becomes more ordered and linear,and the gauche conformation de-creases.Furthermore,the more linear and ordered alkyl chain conformation results in lower thermal conductivity.The thermal conductivity of TaS2-C12 is 0.426 W m-1 K-1,which is only one-third that of the pristine TaS2 crystal.We anticipate that this layered organic-inorganic superlattice design will pave a new avenue for developing new organic-inorganic functional materials and probing the limits of ultralow ther-mal conductivity materials.
关键词
layered organic-inorganic superlattice/intercalation/thermal conductivity/molecular chain conformation/sum fre-quency generationKey words
layered organic-inorganic superlattice/intercalation/thermal conductivity/molecular chain conformation/sum fre-quency generation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据