Linker size dependent mechanical properties of di-imine based molecular crystals
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Deepak Manoharan, Shamim Ahmad, Srinu Tothadi, Franziska Emmerling, Biswajit Bhattacharya, Soumyajit Ghosh
Mechanically flexible molecular crystals have emerged as a fascinating class of materials with the ability to undergo substantial deformation without compromising their structural integrity. We report here four 3,5-di-tert-butyl salicylaldehyde based di-imine crystals. Crystals 1 and 2 were plastic while crystals 3 and 4 were brittle and elastic, respectively. By changing the length of the intervening linker molecule, structure and packing factors were influenced greatly resulting in the final outcome of mechanical properties. It is possible to fine-tune mechanical properties by changing the length of the linker moiety while keeping the peripheral shape synthons the same. These findings open up new avenues for tailoring the mechanical flexibility of molecular crystals, opening up opportunities for their application in various fields.
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CrystEngComm

CrystEngComm is the forum for the design and understanding of crystalline materials. We welcome studies on the investigation of molecular behaviour within crystals, control of nucleation and crystal growth, engineering of crystal structures, and construction of crystalline materials with tuneable properties and functions. We publish hypothesis-driven research into… how crystal design affects thermodynamics, phase transitional behaviours, polymorphism, morphology control, solid state reactivity (crystal-crystal solution-crystal, and gas-crystal reactions), optoelectronics, ferroelectric materials, non-linear optics, molecular and bulk magnetism, conductivity and quantum computing, catalysis, absorption and desorption, and mechanical properties. Using Techniques and methods including… Single crystal and powder X-ray, electron, and neutron diffraction, solid-state spectroscopy, spectrometry, and microscopy, modelling and data mining, and empirical, semi-empirical and ab-initio theoretical evaluations. On crystalline and solid-state materials. We particularly welcome work on MOFs, coordination polymers, nanocrystals, host-guest and multi-component molecular materials. We also accept work on peptides and liquid crystals. All papers should involve the use or development of a design or optimisation strategy. Routine structural reports or crystal morphology descriptions, even when combined with an analysis of properties or potential applications, are generally considered to be outside the scope of the journal and are unlikely to be accepted.