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- W2775496614 abstract "Controlling mechanical properties of crystalline organic materials remains a forbidden challengedespite their wide range practical applications. Our group has recently demonstrated theimportance of supramolecular shape synthons for designing mechanically flexible single crystals.Active slip planes were introduced in crystal structures via different non-interferingsupramolecular weak interactions (shape synthons), namely via van der Waals (vdW), π-stacking, and hydrogen bonding (0D) (carboxylic acid or amide) groups. Here, we extend thisdesign strategy to some diphenyl urea derivatives (as shown in figure 1), in which a linear onedimensional (1D) strong hydrogen-bonded chain is present in one direction which further stackone over the other. In the third orthogonal direction the molecule interact weak dispersiveinteractions (slip planes) in other direction, i.e, orthogonally. The two N-H groups of onemolecule form hydrogen bonds with the C=O of an adjacent molecule, while the vdWsubstituents such as methyl, chloro and bromo groups on either ends of the phenyl rings closepack to form slip planes. Mechanical behavior of the crystals was examined by a simplequalitative method, i.e. applying mechanical stress using a pair of forceps and a metal needlewhile viewing them under a stereomicroscope. To our desire, the single crystals of 1 and 1ashowed plastic flexibility on (1 0 0) and (1 0 0) respectively, while compound 2 underwentbrittle fracture." @default.
- W2775496614 created "2017-12-22" @default.
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- W2775496614 date "2017-04-01" @default.
- W2775496614 modified "2023-09-24" @default.
- W2775496614 title "Design, Synthesis and Study of Mechanical Properties of Crystalline Diphenyl Urea Derivatives" @default.
- W2775496614 hasPublicationYear "2017" @default.
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