Reversible single-crystal to single-crystal polymorphic phase transformation of an organic crystal

Das, Dinabandhu; Engel, Emile R.; Barbour, Leonard J.

doi:10.1039/b923370a

Cited by 43 publications

(29 citation statements)

References 27 publications

(2 reference statements)

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“…Since not all phase transitions follow a single-crystal-to-single-crystal mechanism [60][61], investigating such events with single crystal X-ray diffraction proves difficult at best. PXRD is measured in the bulk with randomised orientation and thus the conditions can be varied widely without loss of applicability of the method.…”

Section: Powder X-ray Diffractionmentioning

confidence: 99%

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

Fucke

Steed

2010

Water

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A review. Diffraction methods are a powerful tool to investigate the crystal structure of organic compounds in general and their hydrates in particular. The laboratory standard technique of single crystal X-ray diffraction gives information about the molecular conformation, packing and hydrogen bonding in the crystal structure, while powder X-ray diffraction on bulk material can trace hydration/dehydration processes and phase transitions under non-ambient conditions. Neutron diffraction is a valuable complementary technique to X-ray diffraction and gives highly accurate hydrogen atom positions due to the interaction of the radiation with the atomic nuclei.Although not yet often applied to organic hydrates, neutron single crystal and neutron powder diffraction give precise structural data on hydrogen bonding networks which will help explain why hydrates form in the first place.

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Section: Powder X-ray Diffractionmentioning

confidence: 99%

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

Fucke

Steed

2010

Water

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“…Hence, the reversible SCSC phase transition is a fascinating phenomenon because of its potential applications in ferroelectric and switchable dielectric devices [1][2][3]. Several molecular crystals that undergo temperature-induced reversible SCSC phase transition have been reported [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Reversible Single-Crystal-to-Single-Crystal Phase Transition of Chiral Salicylidenephenylethylamine

et al. 2016

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Abstract:The chiral crystal of enantiomeric (S)-N-3,5-di-tert-butylsalicylidene-1-phenylethylamine in the enol form [enol-(S)-1] undergoes a reversible single-crystal-to-single-crystal (SCSC) phase transition at T c ≈ 3 • C from the room temperature α-form in orthorhombic space group P2 1 2 1 2 1 (Z = 1) to the low temperature β-form in the monoclinic space group P2 1 (Z = 2) with a thermal hysteresis of approximately 1.7 • C. A detailed comparison of the crystal structures of the α-and β-forms revealed that the 5-tert-butyl group of one molecule in the asymmetric unit of the β-form rotated by ca. 60 • , and the dihedral angle between the phenyl and salicyl planes increased slightly in the β-form crystal. However, the changes in the molecular conformation and packing arrangement are small, which leads to the reversible SCSC phase transition with no destruction of the crystal lattice. The dielectric constant along the b-axis was small, probably due to the weak intermolecular interactions in the crystals.

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“…[13] 2) Sol-gel rearrangements in which LSs are observed during synthesis of crystalline zeolites and act as silica source via dissolution-recrystallisation. [15][16][17][18] Such chemical inheritance-in which no bonds have to be broken in the transition between the parent and the resulting solidinvolves ak nown criterion for at ransformation to occur within the condensed state [19] (the interested reader is referred to as hort additional note in the Supporting Information file). [15][16][17][18] Such chemical inheritance-in which no bonds have to be broken in the transition between the parent and the resulting solidinvolves ak nown criterion for at ransformation to occur within the condensed state [19] (the interested reader is referred to as hort additional note in the Supporting Information file).…”

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confidence: 99%

On Layered Silicates and Zeolitic Nanosheets

et al. 2017

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Zeolite synthesis: In a Communication published in this journal in early 2015, Messinger, Na, Seo, Ryoo, and Chmelka (MNSRC) claim that the formation of zeolite MFI nanosheets proceeds through an intermediate, crystalline layered silicate phase. It is now proposed that the layered silicate phase in the MNSRC work is an artefact rather than a species possibly playing a significant role in MFI nanosheet formation.

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Reversible single-crystal to single-crystal polymorphic phase transformation of an organic crystal

Abstract: Two polymorphs of a substituted dihydroanthracene derivative were prepared by crystallization from different solvents. Each polymorph is reversibly interconvertible to the other by means of a single-crystal to single-crystal phase transformation.

Cited by 43 publications

References 27 publications

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

X-ray and Neutron Diffraction in the Study of Organic Crystalline Hydrates

Reversible Single-Crystal-to-Single-Crystal Phase Transition of Chiral Salicylidenephenylethylamine

On Layered Silicates and Zeolitic Nanosheets

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