Journal ArticleDOI
From Molecules to Interactions to Crystal Engineering: Mechanical Properties of Organic Solids.
TLDR
This Account describes efforts at focusing down into mechanical properties of organic molecular crystals from the viewpoint of crystal engineering, which is the synthesis and design of functional molecular solids and presents examples where complex properties may be deliberately turned on or off in organic crystals.Abstract:
ConspectusMechanical properties of organic molecular crystals have been noted and studied over the years but the complexity of the subject and its relationship with diverse fields such as mechanochemistry, phase transformations, polymorphism, and chemical, mechanical, and materials engineering have slowed understanding. Any such understanding also needs conceptual advances—sophisticated instrumentation, computational modeling, and chemical insight—lack of such synergy has surely hindered progress in this important field. This Account describes our efforts at focusing down into this interesting subject from the viewpoint of crystal engineering, which is the synthesis and design of functional molecular solids. Mechanical properties of soft molecular crystals imply molecular movement within the solid; the type of property depends on the likelihood of such movement in relation to the applied stress, including the ability of molecules to restore themselves to their original positions when the stress is removed...read more
Citations
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The molecular mechanisms of plasticity in crystal forms of theophylline
Hongji Liu,H. C. Stephen Chan,Li Heng Zhang,Yang Lu,Jiaquan Li,Jianting Li,Liang Li,Zhen-huan Zhou +7 more
TL;DR: In this article , the form II anhydrous theophylline (THPa) and its monohydrate (THPm) were experimentally characterized for their distinct plastic and elastic behaviors.
Journal ArticleDOI
Organic Crystals with Response to Multiple Stimuli: Mechanical Bending, Acid-Induced Bending and Heating-Induced Jumping.
Wenbo Wu,Kui Chen,Xiunan Zhang,Shuyu Li,Ting Wang,Hongtu Zhao,Lina Zhou,Xin Huang,Hongxun Hao +8 more
TL;DR: In this article , two polymorphs (Form O and Form R) of a Schiff base compound were found to have different elastic deformability, which can be attributed to the differences in the molecular conformation, structural packing and intermolecular interactions.
Journal ArticleDOI
Design, structural characterization and Hirshfeld surface analysis of Ni(II) and Zn(II) coordination polymers using mixed linker synthetic strategy based on tetratopic and macrocyclic N-donor ligands
TL;DR: In this article , four new coordination polymers of mixed ligands have been synthesized under solvothermal conditions and fully characterized viz. [(Zn(cyclam)(H2BPTC)]n 1, [Ni2cyclam)2(BPTCT)]n 2,[Ni(cyclamide)1.5(TPTC)0.5]n·(H2O) 4 (biphenyl-3,3′,5,5-5′-tetracarboxylic acid (H4BPTC), [1,1′,4′,1″]terphenyl- 3,3″,5.5″-Tetracaranoxyl acid (TETRAZacyclotetradecane), and cyclam= 1,4,8,11-TTE
Journal ArticleDOI
Elastic organic semiconducting single crystals for durable all-flexible field-effect transistors: insights into the bending mechanism
Ranita Samanta,Susobhan Das,Saikat Mondal,Tamador Alkhidir,Sharmarke Mohamed,Satyaprasad P. Senanayak,C. Malla Reddy +6 more
TL;DR: In this article , two alkylated diketopyrrolopyrrole (DPP) semiconducting single crystals, one of which displays impressive elastic mechanical flexibility whilst the other is brittle, were compared to the brittle DPP-diEt crystal.
Journal ArticleDOI
Copper(II) halide salts with 1-(4 '-Pyridyl)-Pyridinediium
TL;DR: In this paper, the properties and magnetic properties of 1,4′-bipyridine and 1,1′-diium are reported and the data were fit to the Curie-Weiss law and yielded Weiss constants of −0.26(5) K and −1.0(1) K (2).
References
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Journal ArticleDOI
Photodimerization in the solid state
TL;DR: In this article, a review of solid-state photochemistry can be found under four parallel headings: first, analysis of the topochemical postulate according to which the course of the solid state reaction and the stereochemistry of the photodimer (if any) can be predicted from the configuration and nearest-neighbour geometry of closest monomer molecules in the crystal lattice; secondly, the study of the lOCUS of the reaction, that is the dependence of the course or (dimerization, cis trans isomerization) on crystal texture (dislocation
Journal ArticleDOI
Isostructurality, Polymorphism and Mechanical Properties of Some Hexahalogenated Benzenes: The Nature of Halogen⋅⋅⋅Halogen Interactions
C. Malla Reddy,Michael T. Kirchner,Ravi C. Gundakaram,K. Anantha Padmanabhan,Gautam R. Desiraju +4 more
TL;DR: Both chemical and geometrical models need to be considered for X...X interactions in hexahalogenated benzenes, where nonspecificity of the weak interlayer interactions here is demonstrated by the structure of twinned crystals of these compounds.
Journal ArticleDOI
Mechanochemical preparation of co-crystals
TL;DR: The preparation of co-crystals via mechanochemistry combines the quest for clean and green processes with the investigation of multicomponent new materials, among the currently most fashionable systems in the crystal engineering field.
Journal ArticleDOI
Mechanochemistry: the varied applications of mechanical bond-breaking
TL;DR: In this paper, a wide range of practical applications of mechanochemistry are outlined with typical examples for ceramics, mechanical alloying, hydrogen storage, organic syntheses, waste remediation, leachings, surface plasmas, radical formation, explosives, nanotube formation, nanoparticles grafting, polymer technology, radical initiation, scratchless polishing, wear protection, lubrication, mechanochromism, nano-dissection, and many more.
Journal ArticleDOI
Elastic and bendable caffeine cocrystals: implications for the design of flexible organic materials.
Soumyajit Ghosh,C. Malla Reddy +1 more
TL;DR: A remarkably flexible, elastically bendable cocrystal solvate 1 is reported, formed from caffeine, 4-chloro-3-nitrobenzoic acid, and methanol in a 1:1:< 1 ratio (Figure 1).
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Elastic and bendable caffeine cocrystals: implications for the design of flexible organic materials.
Soumyajit Ghosh,C. Malla Reddy +1 more