One-Dimensional Iron(II) Compounds Exhibiting Spin Crossover and Liquid Crystalline Properties in the Room Temperature Region

2008 ◽  
Vol 47 (22) ◽  
pp. 10232-10245 ◽  
Author(s):  
M. Seredyuk ◽  
A. B. Gaspar ◽  
V. Ksenofontov ◽  
Y. Galyametdinov ◽  
M. Verdaguer ◽  
...  
Keyword(s):  
Temperature Region ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Spin Crossover ◽  
One Dimensional

Thin Deposits and Patterning of Room-Temperature-Switchable One-Dimensional Spin-Crossover Compounds

Langmuir ◽  
2011 ◽  
Vol 27 (7) ◽  
pp. 4076-4081 ◽  
Author(s):  
Massimiliano Cavallini ◽  
Ilaria Bergenti ◽  
Silvia Milita ◽  
Jean Crispin Kengne ◽  
Denis Gentili ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover ◽  
One Dimensional

A room-temperature liquid crystalline polymer based on discotic 1,3,4-oxadizole

RSC Advances ◽  
2015 ◽  
Vol 5 (59) ◽  
pp. 47579-47583 ◽  
Author(s):  
Jie Han ◽  
Zhuo-Zhi Wang ◽  
Jing Wu ◽  
Li-Rong Zhu
Keyword(s):  
Solid State ◽  
Temperature Region ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Crystalline Polymer ◽  
Side Chain ◽  
Chain Polymer ◽  
Temperature Liquid

A side-chain polymer based on discotic 1,3,4-oxadiazole displays liquid crystalline properties at the room temperature region, and exhibits photoluminescent behaviors in solution, the solid state and liquid crystalline mesophase.

scholarly journals Enhanced dielectricity coupled to spin-crossover in a one-dimensional polymer iron(ii) incorporating tetrathiafulvalene

2020 ◽  
Vol 11 (24) ◽  
pp. 6229-6235 ◽  
Author(s):  
Ya-Ru Qiu ◽  
Long Cui ◽  
Pei-Yu Cai ◽  
Fei Yu ◽  
Mohamedally Kurmoo ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Schiff Base ◽  
Room Temperature ◽  
Spin Crossover ◽  
One Dimensional ◽  
Redox Active ◽  
Crossover Transition

A concerted bending–flattening motion of the redox-active TTF within constructed one-dimensional FeII–TTF–Schiff-base chain with bridging 4,4′-bpy enhances the dielectric constant coupled to its spin-crossover transition above room temperature.

A facile route for preparation of monodisperse nanoparticles of one-dimensional Fe(ii)-4-amino-1,2,4-triazole coordination polymers with hysteretic spin-crossover near room temperature

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39126-39131 ◽  
Author(s):  
Meng-Ya Chen ◽  
Xuan-Rong Chen ◽  
Wei-Hua Ning ◽  
Xiao-Ming Ren
Keyword(s):  
Coordination Polymers ◽  
Room Temperature ◽  
Spin Crossover ◽  
One Dimensional ◽  
Monodisperse Nanoparticles ◽  
Facile Route

Monodisperse nanoparticles of one-dimensional Fe(II)-4-amino-1,2,4-triazole coordination polymers show hysteretic spin-crossover near room temperature.

The Flexibility of Long Chain Substituents Influences Spin-Crossover in Isomorphous Lipid Bilayer Crystals

2021 ◽  
Author(s):  
Iurii Galadzhun ◽  
Rafal Kulmaczewski ◽  
Namrah Shahid ◽  
Oscar Cespedes ◽  
Mark J Howard ◽  
...  
Keyword(s):  
Lipid Bilayer ◽  
High Spin ◽  
Room Temperature ◽  
Spin Crossover ◽  
Pyridine Derivatives ◽  
Long Chain

[Fe(bpp)2][BF4]2 (bpp = 2,6-di{pyrazol-1-yl}pyridine) derivatives bearing a bent geometry of hexadec-1-ynyl or hexadecyl substituents pyrazole are isomorphous, and high-spin at room temperature. However, only the latter compound undergoes an abrupt,...

Crystal structure of the anticancer drug carmustine determined by X-ray powder diffraction

2021 ◽  
pp. 1-3
Author(s):  
Carina Schlesinger ◽  
Edith Alig ◽  
Martin U. Schmidt
Keyword(s):  
Crystal Structure ◽  
Anticancer Drug ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Powder Diffraction Data ◽  
Orthorhombic Space Group ◽  
Commercial Sample ◽  
One Dimensional ◽  
X Ray ◽  
Hydrogen Bond Pattern

The structure of the anticancer drug carmustine (1,3-bis(2-chloroethyl)-1-nitrosourea, C5H9Cl2N3O2) was successfully determined from laboratory X-ray powder diffraction data recorded at 278 K and at 153 K. Carmustine crystallizes in the orthorhombic space group P212121 with Z = 4. The lattice parameters are a = 19.6935(2) Å, b = 9.8338(14) Å, c = 4.63542(6) Å, V = 897.71(2) ų at 153 K, and a = 19.8522(2) Å, b = 9.8843(15) Å, c = 4.69793(6) Å, V = 921.85(2) ų at 278 K. The Rietveld fits are very good, with low R-values and smooth difference curves of calculated and experimental powder data. The molecules form a one-dimensional hydrogen bond pattern. At room temperature, the investigated commercial sample of carmustine was amorphous.

scholarly journals A family of heterobimetallic cubes shows spin‐crossover behaviour near room temperature

2021 ◽  
Author(s):  
Matthias Hardy ◽  
Jacopo Tessarolo ◽  
Julian J. Holstein ◽  
Niklas Struch ◽  
Norbert Wagner ◽  
...  
Keyword(s):  
Room Temperature ◽  
Spin Crossover

A new one-dimensional CdIIcoordination polymer with a two-dimensional layered structure incorporating 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole and benzene-1,2-dicarboxylate ligands

2016 ◽  
Vol 72 (6) ◽  
pp. 480-484 ◽  
Author(s):  
Qiu-Ying Huang ◽  
Xiao-Yi Lin ◽  
Xiang-Ru Meng
Keyword(s):  
Layered Structure ◽  
Room Temperature ◽  
Weak Interactions ◽  
Coordination Geometry ◽  
Dimensional Chain ◽  
Two Dimensional ◽  
One Dimensional ◽  
Heterocyclic Ligand ◽  
Rich Variety ◽  
Solvent Molecules

The N-heterocyclic ligand 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole (imb) has a rich variety of coordination modes and can lead to polymers with intriguing structures and interesting properties. In the coordination polymercatena-poly[[cadmium(II)-bis[μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′]-cadmium(II)-bis{μ-2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole}-κ2N2:N3;κ2N3:N2] dimethylformamide disolvate], {[Cd(C8H4O4)(C11H10N4)]·C3H7NO}n, (I), each CdIIion exhibits an irregular octahedral CdO4N2coordination geometry and is coordinated by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic2−) ligands and two N atoms from two symmetry-related imb ligands. Two CdIIions are connected by two benzene-1,2-dicarboxylate ligands to generate a binuclear [Cd2(1,2-bdic)2] unit. The binuclear units are further connected into a one-dimensional chain by pairs of bridging imb ligands. These one-dimensional chains are further connected through N—H...O hydrogen bonds and π–π interactions, leading to a two-dimensional layered structure. The dimethylformamide solvent molecules are organized in dimeric pairsviaweak interactions. In addition, the title polymer exhibits good fluorescence properties in the solid state at room temperature.

Polar Optical Phonon Instability and Intervalley Transfer in Gallium Nitride

1998 ◽  
Vol 512 ◽  
Author(s):  
B. E. Foutz ◽  
S. K. O'leary ◽  
M. S. Shur ◽  
L. F. Eastman ◽  
B. L. Gelmont ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Analytical Model ◽  
Optical Phonon ◽  
Room Temperature ◽  
Phonon Scattering ◽  
Polar Optical Phonon ◽  
Scattering Mechanism ◽  
Loss Mechanism ◽  
One Dimensional ◽  
Optical Phonon Scattering

ABSTRACTWe develop a simple, one-dimensional, analytical model, which describes electron transport in gallium nitride. We focus on the polar optical phonon scattering mechanism, as this is the dominant energy loss mechanism at room temperature. Equating the power gained from the field with that lost through scattering, we demonstrate that beyond a critical electric field, 114 kV/cm at T = 300 K, the power gained from the field exceeds that lost due to polar optical phonon scattering. This polar optical phonon instability leads to a dramatic increase in the electron energy, this being responsible for the onset of intervalley transitions. The predictions of our analytical model are compared with those of Monte Carlo simulations, and are found to be in satisfactory agreement.

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