Recent Advances in the Asymmetric Growth of Organic Polar Crystals: A Review

Cen, Zhenkai; Li, Fan; Wei, Jiahao; Gao, Zhenjie; Liu, Zhicheng; Zhang, Tao; Han, Dandan; Chen, Mingyang; Gong, Junbo

doi:10.1021/acs.cgd.3c00425

Cited by 2 publications

(1 citation statement)

References 147 publications

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“…According to Neumann's principle, which is a fundamental postulate in crystallography, all physical properties of a crystal are related to the symmetry of the crystal [5]; for physical applications of organic crystals, symmetry research on the polar axis is an active field, cf. [6]. Crystallographers therefore do their utmost effort to establish the correct space group symmetry.…”

Section: Introductionmentioning

confidence: 99%

Space Group Choice for an Octahedral Zn Complex with Nalidixic Acid and (R,R)-Diaminocyclohexane as Ligands: Get the Stereochemistry Right

Lutz,

Müller

2024

Crystals

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With this report, the space group of [Zn(Nal)(DACH)2]Cl is corrected (Nal: nalidixic acid mono-anion; DACH: diaminocyclohexane) from its wrong description in the literature. In the correct, non-centrosymmetric space group P1, the crystal structure is well ordered and the stereochemistry is correct. Crystallographic tools to recognize the correct symmetry are described. This work encourages experienced and inexperienced scientists to remain critical about the output of automatic, black-box crystallographic software.

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Section: Introductionmentioning

confidence: 99%

Space Group Choice for an Octahedral Zn Complex with Nalidixic Acid and (R,R)-Diaminocyclohexane as Ligands: Get the Stereochemistry Right

Lutz,

Müller

2024

Crystals

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Control of Polar/Antipolar Layered Organic Semiconductors by the Odd‐Even Effect of Alkyl Chain

Inoue,

Higashino,

Nikaido

et al. 2024

Advanced Science

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Some rodlike organic molecules exhibit exceptionally high layered crystallinity when composed of a link between π‐conjugated backbone (head) and alkyl chain (tail). These molecules are aligned side‐by‐side unidirectionally to form self‐organized polar monomolecular layers, providing promising 2D materials and devices. However, their interlayer stacking arrangements have never been tunable, preventing the unidirectional arrangements of molecules in whole crystals. Here, it is demonstrated that polar/antipolar interlayer stacking can be systematically controlled by the alkyl carbon number n, when the molecules are designed to involve effectively weakened head‐to‐head affinity. They exhibit remarkable odd–even effect in the interlayer stacking: alternating head‐to‐head and tail‐to‐tail (antipolar) arrangement in odd‐n crystals, and uniform head‐to‐tail (polar) arrangement in even‐n crystals. The films show excellent field‐effect transistor characteristics presenting unique polar/antipolar dependence and considerably improved subthreshold swing in the polar films. Additionally, the polar films present enhanced second‐order nonlinear optical response along normal to the film plane. These findings are key for creating polarity‐controlled optoelectronic materials and devices.

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Recent Advances in the Asymmetric Growth of Organic Polar Crystals: A Review

Cited by 2 publications

References 147 publications

Space Group Choice for an Octahedral Zn Complex with Nalidixic Acid and (R,R)-Diaminocyclohexane as Ligands: Get the Stereochemistry Right

Space Group Choice for an Octahedral Zn Complex with Nalidixic Acid and (R,R)-Diaminocyclohexane as Ligands: Get the Stereochemistry Right

Control of Polar/Antipolar Layered Organic Semiconductors by the Odd‐Even Effect of Alkyl Chain

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