Structural phase transition and dielectric responses in two novel cyano-bridged coordination polymers synthesized by sealing the incomplete cyano-bridged cage

Abstract

Three-dimensional anion frameworks loaded with small cationic molecules are often reasonable models for design of switching materials. However, due to limitations of bond length and structural stability, it is difficult...

Intermolecular Forces Regulating the Phase-Transition Temperatures in Organic–Inorganic Hybrid Materials

“…This will further lead to the development of smart phase-transition materials with different T c values for applications in various challenging temperature environments. However, there are rare studies and reports on how to effectively regulate T c so far, which will make it difficult to help people in the preparation of smart switches and sensors with specific T c . − Dielectric materials, as a type of temperature-responsive smart material, exhibit a sudden change in their dielectric constant near the T c , imparting switch-like characteristics. As a highly promising switching material, more and more reports on its properties and applications are being published. − …”

Side-Chain Engineering for Modulating the Mechanical and Thermosalient Behavior of Elastic Crystals of Triple-Helix Coordination Polymers

“…Stimuli-responsive crystalline coordination polymers (CPs) that respond to environmental changes in temperature, 1−3 pressure, 4,5 light, 6−8 and guest molecules 9,10 show promising applications in a wide range of fields. 11−13 Besides responsiveness in the form of changes in physicochemical properties at the microscopic level such as phase transitions, 14 discoloration, 15 luminescence, 16,17 etc., emergent research activities have contributed to the understanding of the macroscopic mechanical response of crystalline CP materials under stimuli such as heat, pressure, and light. 1,2,4,18−31 Among such a class of mechanically responsive CPs, those with multiple mechanical responsiveness that can mechanically respond to two or more kinds of external signals are more desirable.…”

“…Stimuli-responsive crystalline coordination polymers (CPs) that respond to environmental changes in temperature, − pressure, , light, − and guest molecules , show promising applications in a wide range of fields. − Besides responsiveness in the form of changes in physicochemical properties at the microscopic level such as phase transitions, discoloration, luminescence, , etc., emergent research activities have contributed to the understanding of the macroscopic mechanical response of crystalline CP materials under stimuli such as heat, pressure, and light. ,,,− Among such a class of mechanically responsive CPs, those with multiple mechanical responsiveness that can mechanically respond to two or more kinds of external signals are more desirable. ,, Despite the emergence of mechanically responsive CP materials, there are still significant challenges in tailoring such a kind of material, and a comprehensive understanding of structure–activity relationships and structural features that influence the mechanical responsiveness will be beneficial for enabling custom synthesis on demand in future. − , …”

Switchable coordination bonds in 3D cyano-bridged perovskite ferroelastics: achieving the largest leap of symmetry breaking and enhanced dielectric switching performance

“…27–34 Among these, three-dimensional (3D) cyano-bridged perovskites have attracted considerable attention, primarily because many cyanide compounds exhibit an intriguing dielectric property switchability triggered by structural phase transitions. 35–38 In 3D cyano-bridged perovskites, various metal ions can be linked by the cyanide ions to form the striking double perovskite structure, A 2 [B′B′′(CN) 6 ] (A = monovalent cation, B′(I) = monovalent metals, such as K + , Rb + , and Cs + , and B′′(III) = trivalent metals, such as Fe 3+ and Co 3+ ). Incorporating cationic A guests into the host cages formed by B′−NC−B′′ results in the assembly of a 3D hole structure, making it a highly promising class of switchable molecular dielectrics.…”