Reversible phase transition driven by order–disorder transformations of metal-halide moieties in [(C6H14)NH2]2·CuBr4. Issue 32 (28th July 2016)

• Record Type: Journal Article
• Authors: Asghar, Muhammad Adnan; Zhang, Shuquan; Khan, Tariq; Sun, Zhihua; Zeb, Aurang; Ji, Chengmin; Li, Lina; Zhao, Sangen; Luo, Junhua
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 32(2016)
• Page Start: 7537
• Page End: 7540
• Publication Date: 2016-07-28
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc02034h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : [(C6 H14 )NH2 ]2 ·CuBr4 (1 ), an organic–inorganic hybrid material, undergoes a reversible first-order phase transition around 194 K, triggered by the order–disorder transformation of metal-coordinated halogen atoms. Abstract : A novel phase transition has been discovered where the phase transition is primarily accomplished by the order–disorder transformation of metal-coordinated halogen atoms in an organic–inorganic hybrid material [(C6 H14 )NH2 ]2 ·CuBr4 (1 ). Its phase transition behaviour was verified by specific heat capacity ( C p ) and differential scanning calorimetry (DSC) measurements with a thermal hysteresis at 4.8 K. The dielectric measurements of1 show a distinct step-like anomaly around T c, demonstrating two states at two different phases, which enlightens that1 can be conceived as a potential switchable dielectric material. Moreover, temperature-dependent single-crystal X-ray diffraction analyses of1 disclose that disordering of metal-halides together with reorientations of the cations is the cause of this unique phase-transition material. All these results open a new way to design and assemble novel phase transition materials.