13 research outputs found
Gas Permeation in a Molecular Crystal and Space Expansion
A novel
single-crystal membrane [CuÂ(II)<sub>2</sub>(4-F-bza)<sub>4</sub>(2-mpyz)]<sub><i>n</i></sub> (4-F-bza = 4-fluorobenzoate;
2-mpyz = 2-methylpyrazine) was synthesized and its identical permeability
in any crystal direction in the correction for tortuosity proved that
gas diffuses inside the channels without detour. H<sub>2</sub> permeated
by 1.18 × 10<sup>–12</sup> mol m m<sup>–2</sup> s<sup>–1</sup> Pa<sup>–1</sup> with a high selectivity
(<i>F</i>α: 23.5 for H<sub>2</sub>/CO and 48.0 for
H<sub>2</sub>/CH<sub>4</sub>) through its 2D-channels having a minimum
diameter of 2.6 Ã…, which is narrower than the Lennard-Jones diameter
of H<sub>2</sub> (2.827 Ã…), CO (3.690 Ã…), and CH<sub>4</sub> (3.758 Ã…). The high rate of permeation was well explained by
a modified Knudsen diffusion model based on the space expansion effect,
which agrees with the observed permselectivity enhanced for smaller
gases in considering the expansion of a channel resulting from the
collision of gas molecules or atoms onto the channel wall. An analysis
of single-crystal X-ray data showed the expansion order to be H<sub>2</sub> > Ar > CH<sub>4</sub>, which was expected from the
permeation
analysis. The permselectivity of a porous solid depends on the elasticity
of the pores as well as on the diameter of the vacant channel and
the size of the target gas
Supplementary information from Twinning ferroelasticity facilitated by the partial flipping of phenyl rings in single crystals of 4,4′-dicarboxydiphenyl ether
Experimental details and crystallographic dat
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals
Structural and Thermal Diffusivity Analysis of an Organoferroelastic Crystal Showing Scissor-Like Two-Directional Deformation Induced by Uniaxial Compression
A two-directional ferroelastic deformation in organic
crystals
is unprecedented owing to its anisotropic crystal packing, in contrast
to isotropic symmetrical packing in inorganic compounds and polymers.
Thereby, finding and constructing multidirectional ferroelastic deformations
in organic compounds is undoubtedly complex and at once calls for
deep comprehension. Herein, we demonstrate the first example of a
two-directional ferroelastic deformation with a unique scissor-like
movement in single crystals of trans-3-hexenedioic
acid by the application of uniaxial compression stress. A detailed
structural investigation of the mechanical deformation at the macroscopic
and microscopic levels by three distinct force measurement techniques
(including shear and three-point bending test), single crystal X-ray
diffraction techniques, and polarized synchrotron-FTIR microspectroscopy
highlighted that mechanical twinning promoted the deformation. The
presence of two crystallographically equivalent faces and the herringbone
arrangement promoted the two-directional ferroelastic deformation.
In addition, anisotropic heat transfer properties in the parent and
the deformed domains were investigated by thermal diffusivity measurement
on all three axes using microscale temperature-wave analysis (μ-TWA).
A correlation between the anisotropic structural arrangement and the
difference in thermal diffusivity and mechanical behavior in the two-directional
organoferroelastic deformation could be established. The structural
and molecular level information from this two-directional ferroelastic
deformation would lead to a more profound understanding of the structure–property
relationship in multidirectional deformation in organic crystals