Article
Chemistry, Physical
Pradip Chakraborty, Mouhamadou Sy, Houcem Fourati, Teresa Delgado, Mousumi Dutta, Chinmoy Das, Celine Besnard, Andreas Hauser, Cristian Enachescu, Kamel Boukheddaden
Summary: This study investigates the behavior of the spin crossover compound [Fe(ptz)(6)](BF4)(2) in the host lattice of [Ru(ptz)(6)](BF4)(2), revealing a decoupling between crystallographic phase transitions and thermal spin transitions. Dilution with Ru reduces the cooperative character of the transition and results in observed hysteretic thermal transitions with slight domain formation. The transition temperature is slightly dependent on crystal properties, emphasizing the importance of Ru spatial distribution in addition to crystal shape and size.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Jing Guo, Shi-Yong Zhang, Cheng-Hui Zeng, Zhong-Gao Zhou, Miao Xie, Zi-Yi Du, Chun-Ting He, Wei-Xiong Zhang, Xiao-Ming Chen
Summary: Free accessible confined space and loose interaction can be achieved in an ionic crystal (HMIm)(3)[La(NO3)(6)], which is composed of near-spherical anions and disc-shaped ammonium cations. The confined space of (HMIm)(+) ions can be finely tuned over a broad temperature range, allowing modulation of dipolar polarization. Small-scale substitution of (HMIm)(+) ions and fine-tuning of doping ratio in the molecular solid solutions further regulate the dipole motion in the crystalline environment.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuan-Yuan Tang, Jun-Chao Liu, Yu-Ling Zeng, Hang Peng, Xue-Qin Huang, Meng-Juan Yang, Ren-Gen Xiong
Summary: The successful synthesis of an organic photochromic ferroelectric material capable of reversible switching of dielectric permittivity and spontaneous polarization through photoinduced structural phase transition opens up possibilities for photocontrolled smart materials and biomechanical applications in the future.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Jun-Chao Liu, Yong Ai, Qin Liu, Yi-Piao Zeng, Xiao-Gang Chen, Hui-Peng Lv, Ren-Gen Xiong, Wei-Qiang Liao
Summary: This article presents a solid-liquid crystal biphasic ferroelectric material, cholestanyl 4-X-benzoate (4X-CB, X = Cl, Br, and I), that exhibits biferroelectricity in both the solid and liquid crystal phases. The liquid crystal phase of 4X-CB is identified as a cholesteric phase with a helical structure, different from the ordinary chiral smectic ferroelectric liquid crystal phase. Furthermore, the spontaneous polarization of 4X-CB in both phases can be regulated by different halogen substitutions. It is suggested that 4X-CB is the first ferroelectric material with tunable biferroelectricity, providing a feasible case for the performance optimization of solid-liquid crystal biphasic ferroelectrics.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Y. Singh, K. Affes, N. -I. Belmouri, K. Boukheddaden
Summary: This study investigates the effect of mechanical clamping on thermally induced spin transition in a deformable spin-crossover single crystal. It is found that straining the system edge not only changes the nature of the phase transition but also causes significant macroscopic bending effects. The spatiotemporal investigations reveal the formation of spatially organized tensile and compressive regions resulting from the system's bending.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Hui Fang, Zheng Liu, Shen Zhou, Peng-Xiang Fu, Ye-Xin Wang, Zi-Yu Wang, Zhe-Ming Wang, Song Gao, Shang-Da Jiang
Summary: This study demonstrates for the first time the feasibility of achieving quantum coherent SEC effect in molecular ferroelectrics by manipulating the zero-field splitting of Mn(II) ions to achieve controllable phase shifts. Detailed investigations reveal the vanishment and enhancement of SEC effects at different crystal orientations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Yuki Hagiwara, Shodai Hasebe, Hiroki Fujisawa, Junko Morikawa, Toru Asahi, Hideko Koshima
Summary: This paper reports the high-speed bending of anisole crystals using natural vibration induced by the photothermal effect. The bending behavior is greatly amplified through resonance to achieve high frequency, large bending, and high energy conversion efficiency. Any light-absorbing crystal can be actuated by the photothermally induced natural vibration. This versatile crystal actuation method can contribute to the development of soft robots with high-speed and high-efficiency actuation capabilities.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Conor T. Kelly, Michael Griffin, Kane Esien, Solveig Felton, Helge Muller-Bunz, Grace G. Morgan
Summary: This study reports a unique thermal spin crossover phenomenon in [FeIII(4-OMe-sal2323)]NO3 complex (1a), which exhibits different structural and magnetic properties at room temperature compared to other complexes, attributed to the influence of crystal packing upon heating.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Yong-Xian Huang, Hua-Juan Hu, Rong-Jia Wei, Guo-Hong Ning, Dan Li
Summary: This study prepared an analogous complex and obtained a series of crystalline polymorphs with different packing modes and intermolecular interactions. By comparing different ligands, it was found that the NCSe- ligand showed a stronger ligand-field strength and weaker cooperativity compared to NCS-, resulting in a critical shift of T-1/2 values and a more gradual transition process.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Tomohiro Seki, Daiki Korenaga
Summary: A chloroplatinum complex was arylated to obtain stimuli-responsive molecular crystals that showed polymorph-dependent emission, mechano- and thermochromic luminescence, as well as comproportionation and π-bridged dimerization. Simple mixing of structurally similar arylplatinum complexes at room temperature resulted in the transfer of their aryl groups (comproportionation), allowing the tuning of their mechanochromic profiles. Recrystallization of the complex resulted in a dimerized product with a very short Pt-Pt distance bridged by aryl groups.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Jun-Chao Liu, Fang-Fang Di, Yi-Piao Zeng, Wu-Jia Chen, Xiao-Yun Huang, Yan-Ling Luo, Xuan Zhu, Lin Zhou, Yuan-Yuan Tang
Summary: In this study, an above-room-temperature host-guest inclusion ferroelastic crystal was successfully designed and the phase transition temperature and type were effectively controlled by replacing the anion. The ferroelastic domains of this crystal can be switched under thermal stimulus as well as rapidly switched in situ under external stress, suggesting its potential in dual-channel switches.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hao-Fei Ni, Jia-He Lin, Chang-Feng Wang, Qing-Feng Luo, Pei-Zhi Huang, Zhi-Xu Zhang, Da-Wei Fu, Yi Zhang
Summary: This study achieves the coexistence of multiple ferroic ordering in (imidazolium)3PbBr5 by utilizing ingenious molecular orientation dynamics, offering instructive clues for designing multiple ferroic orderings in a single material.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Haruka Kubo, Ryusei Oketani, Ichiro Hisaki
Summary: The quasi single-crystal-to-single-crystal transformation of a hydrogen-bonded organic framework (HOF) was accurately revealed in this study, with the proposed mechanism indicating the involvement of Br/π interaction. This interaction allowed for the successful resolution of the intermediate phase of the crystal structure.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Przemyslaw Szklarz, Vasyl Kinzhybalo, Grazyna Bator
Summary: This study investigates the temperature-dependent polar properties of the novel single-component molecular ferroelectric single crystal of 1,3,5-trimethylnitrobenzene (TMNB). Three solid-state phases of TMNB have been identified, with phase III exhibiting ferroelectricity along the c-axis. The origin of spontaneous polarization in this crystal is attributed to the flexibility of the C-H···π hydrogen bonds in the molecular joints. The phase transitions in TMNB are governed by the dynamics of the NO2 groups and the flexibility of the C-H···π dimer.
Article
Chemistry, Inorganic & Nuclear
Ju Wang, Yun Li, Rong-Jia Wei, Zheng Tang, Zi-Shuo Yao, Jun Tao
Summary: In this study, three iron(II) halide complexes with stable coordination structures and suitable ligand-field strength were synthesized. These compounds exhibit robust spin transitions in both solid state and solution.
INORGANIC CHEMISTRY
(2023)