负热膨胀
普鲁士蓝
热膨胀
衍射
材料科学
中子衍射
离子
同步加速器
分子
热的
密度泛函理论
吸收(声学)
结晶学
化学物理
凝聚态物理
化学
晶体结构
计算化学
物理化学
热力学
物理
光学
有机化学
复合材料
电化学
电极
作者
Qilong Gao,Jun Chen,Qiang Sun,Dahu Chang,Q. Huang,Hui Wu,Andrea Sanson,Ruggero Milazzo,He Zhu,Qiang Li,Zhanning Liu,Jinxia Deng,Xianran Xing
标识
DOI:10.1002/anie.201702955
摘要
Abstract The control of thermal expansion of solid compounds is intriguing but remains challenging. The effect of guests on the thermal expansion of open‐framework structures was investigated. Notably, the presence of guest ions (K + ) and molecules (H 2 O) can substantially switch thermal expansion of YFe(CN) 6 from negative ( α v =−33.67×10 −6 K −1 ) to positive ( α v =+42.72×10 −6 K −1 )—a range that covers the thermal expansion of most inorganic compounds. The mechanism of such substantial thermal expansion switching is revealed by joint studies with synchrotron X‐ray diffraction, X‐ray absorption fine structure, neutron powder diffraction, and density functional theory calculations. The presence of guest ions or molecules plays a critical damping effect on transverse vibrations, thus inhibiting negative thermal expansion. An effective method is demonstrated to control the thermal expansion in open‐framework materials by adjusting the presence of guests.
科研通智能强力驱动
Strongly Powered by AbleSci AI