High-pressure induced conformational and phase transformations of 1,4-dioxane probed by Raman spectroscopy

Ren, Yufen; Zhang, Huanjun; Zhang, Jitao; Cheng, Xuerui; Jiang, Liying; Chen, Zhenping; Hirata, Dai

doi:10.1016/j.molstruc.2020.127987

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…[44] In the case of the (1010) plane, the dominant Raman mode is shifted toward the lower wavenumber while one lattice Raman mode has disappeared and this can be convincing evidence for the increase of local lattice disorder in the grown crystal. [48][49][50][51][52][53][54][55] More interestingly, in the case of the (4211) plane, the lattice Raman mode is shifted from 201 to 192 cm −1 while here also one higher wavenumber lattice Raman mode has disappeared and such kind of significant changes in the Raman lattice modes clearly show the formation of local lattice disorder in the case of the (4211) plane. [48][49][50][51][52][53][54][55] The Differential Scanning Calorimetric (DSC) technique is well established to be one of the powerful tools to distinguish the crystalline and the amorphous states of the solid-state samples [56,57] such that the required DSC study is performed to reaffirm the degree of crystalline nature of the NSH sample with respect to their planes.…”

Section: Lattice Raman Modesmentioning

confidence: 71%

“…[48][49][50][51][52][53][54][55] More interestingly, in the case of the (4211) plane, the lattice Raman mode is shifted from 201 to 192 cm −1 while here also one higher wavenumber lattice Raman mode has disappeared and such kind of significant changes in the Raman lattice modes clearly show the formation of local lattice disorder in the case of the (4211) plane. [48][49][50][51][52][53][54][55] The Differential Scanning Calorimetric (DSC) technique is well established to be one of the powerful tools to distinguish the crystalline and the amorphous states of the solid-state samples [56,57] such that the required DSC study is performed to reaffirm the degree of crystalline nature of the NSH sample with respect to their planes. Note that dehydration of water molecules is not dealt with for the NSH sample as more focus is given to the melting point of the DSC measurements that were performed using a DSC60 plus in the temperature range of 35 to 300 °C at a scanning rate of 5 °C min −1 in the nitrogen gas atmosphere.…”

Section: Lattice Raman Modesmentioning

confidence: 71%

“…[ 48 ‐ 55 ] More interestingly, in the case of the (4211) plane, the lattice Raman mode is shifted from 201 to 192 cm −1 while here also one higher wavenumber lattice Raman mode has disappeared and such kind of significant changes in the Raman lattice modes clearly show the formation of local lattice disorder in the case of the (4211) plane. [ 48–55 ]…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, in justifying the outcomes of the indented research, Raman spectroscopic results can provide more inroads into the local disorder of the crystal structure. [43][44][45][46][47][48][49][50][51][52][53][54] The recorded lattice modes Raman spectra of the grown crystals and the observed lattice Raman modes are presented in Figure 3. Note that, in the case of NiSO 4 .6H 2 O for the (004) plane, the lattice Raman mode positions are observed at 210, 236, and 269 cm −1 such that the observed Raman band positions are well-matched with the previous reports.…”

Section: Lattice Raman Modesmentioning

confidence: 99%

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Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Aswathppa,

Sathiyadhas,

Muthuvel

et al. 2023

Cryst. Res. Technol.

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In this article of generalized view, a comparison of the long‐range order crystalline perfection of crystals is made with respect to their planes grown by the unidirectional growth technique. Based on the obtained results, it is established that the uni‐indexed grown crystals yield a high degree of crystalline perfection and to a certain extent the bi‐indexed crystals, but tri‐indexed crystals grow with higher lattice disorders. Herein, uni‐indexed crystal means the crystal grown along a plane has only one integer out of the h, k, and l whereas the other values are zero [e.g., (100), (010), (001)]. Bi‐indexed crystal means the crystal grown along a plane has integers for any two of the h, k, and l but the remaining value is zero [e.g., (110), (011), (101)]. Tri‐indexed crystal means the crystal grown along the plane has integers for all the values of h, k, and l [e.g., (111)].

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Section: Lattice Raman Modesmentioning

confidence: 71%

Section: Lattice Raman Modesmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Lattice Raman Modesmentioning

confidence: 99%

See 2 more Smart Citations

Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Aswathppa,

Sathiyadhas,

Muthuvel

et al. 2023

Cryst. Res. Technol.

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“…In general, the vibrational Raman spectroscopic investigations can provide a better understanding of a particular anionic and cationic molecular unit’s behavior even in complex structural phase transitions as well as in weak transitions. If the transition is weak or strong, some minutiae change in the interatomic distances and degree of translational or orientational configurations of the ions can occur, which could be very well-defined by the Raman spectroscopic techniques − and such a kind of translational or orientational disordered configuration of the ions is very hard to be observed by the standard and conventional crystallographic structural techniques such as X-ray diffraction (XRD), , electronic diffraction (TEM), , electron paramagnetic resonance, , and other thermal-assisted approaches such as differential scanning calorimetry (DSC)…”

Section: Introductionmentioning

confidence: 99%

Acoustic Shock Wave-Induced Amorphous to Crystalline Phase Transitions of Li₂SO₄─Raman Spectroscopic and Thermal Calorimetric Approach

Aswathappa,

Dai,

Jude Dhas

et al. 2024

J. Phys. Chem. A

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In this context, we have reexamined the acoustical shock wave-induced amorphous-glassy-crystalline−amorphous phase transitions in the Li 2 SO 4 sample under 0, 1, 2, and 3 shocked conditions by implementing the detailed Raman spectroscopic approach. The recorded Raman spectroscopic data clearly reveal that the transition from the amorphous-glassycrystalline state occurs because of a significant reduction of the translational disorder of lithium cations, particularly [Li (2)] ions wherein a slight reduction of the librational disorder of SO 4 anions takes place, whereas the crystalline to amorphous transition occurs only at the third shocked condition because of the librational disorder of SO 4 anions. The double degenerate υ 2 and υ 4 Raman modes provide a clear indication of the occurrence of the librational disorder of SO 4 anions at the third shocked condition. Followed by the internal Raman modes, a detailed discussion is provided on the external Raman modes of the Li ions and SO 4 ions with respect to the observed phase transitions, wherein it is found that the regions of lattice modes are significantly altered at each and every point of phase transition. Furthermore, the thermal and magnetic measurements have been performed for the above-mentioned state of Li 2 SO 4 samples, whereby the obtained results of the magnetic loops and the thermal property resemble the observed structural transitions with respect to the number of shock pulses such that the inter-relationship of the structure-electrical-magnetic-thermal properties of Li 2 SO 4 could be explored.

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Turning On Solid‐State Luminescence by Phototriggered Subtle Molecular Conformation Variations

Zhao

Liu

et al. 2020

Advanced Materials

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The development of solid‐state intelligent materials, in particular those showing photoresponsive luminescence (PRL), is highly desirable for their cutting‐edge applications in sensors, displays, data‐storage, and anti‐counterfeiting, but is challenging. Few PRL materials are constructed by tethering the classic photochromic systems with newly‐emerged solid‐state emitters. Selective solid‐state photoreactions are demanded to precisely manipulate the luminescent behavior of these emitters, which require dramatic structural change and enough free space, thus limiting the scope of the PRL family. Here, a new PRL material, TPE‐4N, that features sensitive and reversible fluorescence switching is reported. The interesting on–off luminescent property of TPE‐4N can be facilely tuned through fast phototriggering and thermal annealing. Experimental and theoretical investigations reveal that subtle molecular conformation variation induces the corresponding PRL behavior. The crystalline and amorphous state endows an efficient and weak ISC process, respectively, to turn on and off the emission. The readily fabricated thin‐film of TPE‐4N exhibits non‐destructive PRL behavior with high contrast (>102), good light transmittance (>72.3%), and great durability and reversibility under room light for months. Remarkably, a uniform thin‐film with such fascinating PRL properties allows high‐tech applications in invisible anti‐counterfeiting and dynamic optical data storage with micro‐resolution.

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High-pressure induced conformational and phase transformations of 1,4-dioxane probed by Raman spectroscopy

Cited by 8 publications

References 31 publications

Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Acoustic Shock Wave-Induced Amorphous to Crystalline Phase Transitions of Li₂SO₄─Raman Spectroscopic and Thermal Calorimetric Approach

Turning On Solid‐State Luminescence by Phototriggered Subtle Molecular Conformation Variations

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High-pressure induced conformational and phase transformations of 1,4-dioxane probed by Raman spectroscopy

Cited by 8 publications

References 31 publications

Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Crystal Growth by Unidirectional Method ‐ A Generalized View on the Crystalline Perfection of the Uni‐Indexed, Bi‐Indexed, and Tri‐Indexed Plane Single Crystals

Acoustic Shock Wave-Induced Amorphous to Crystalline Phase Transitions of Li2SO4─Raman Spectroscopic and Thermal Calorimetric Approach

Turning On Solid‐State Luminescence by Phototriggered Subtle Molecular Conformation Variations

Contact Info

Product

Resources

About

Acoustic Shock Wave-Induced Amorphous to Crystalline Phase Transitions of Li₂SO₄─Raman Spectroscopic and Thermal Calorimetric Approach