Journal ArticleDOI
From Molecules to Interactions to Crystal Engineering: Mechanical Properties of Organic Solids.
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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
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Next-Generation Organic Photonics: The Emergence of Flexible Crystal Optical Waveguides
Mari Annadhasan,Supratim Basak,Supratim Basak,Naisa Chandrasekhar,Naisa Chandrasekhar,Rajadurai Chandrasekar +5 more
Journal ArticleDOI
Harnessing molecular rotations in plastic crystals: a holistic view for crystal engineering of adaptive soft materials
TL;DR: This tutorial review presents a holistic view of PCs by unifying the recent excellent progress in fundamental concepts from diverse areas as well as comparing them with liquid crystals, amphidynamic crystals, ordered crystals, etc.
Journal ArticleDOI
Micromanipulation of Mechanically Compliant Organic Single‐Crystal Optical Microwaveguides
Mari Annadhasan,Durga Prasad Karothu,Ragaverthini Chinnasamy,Luca Catalano,Ejaz Ahmed,Soumyajit Ghosh,Panče Naumov,Panče Naumov,Rajadurai Chandrasekar +8 more
TL;DR: The approach reported here effectively overcomes the difficulties that are commonly encountered with reshaping and positioning of small delicate objects (the "thick fingers" problem), and can be applied to mechanically reconfigure organic optical waveguides in order to attain spatial control over their output in two and three dimensions in optical microcircuits.
Journal ArticleDOI
Spatial Photocontrol of the Optical Output from an Organic Crystal Waveguide
Jad Mahmoud Halabi,Ejaz Ahmed,Luca Catalano,Durga Prasad Karothu,Rachid Rezgui,Panče Naumov,Panče Naumov +6 more
TL;DR: Spatial photocontrol over the optical output from slender single crystals of an azo compound, 3',4'-dimethyl-4-(dimethylamino)azobenzene that can be used as crystalline optical waveguide is demonstrated.
Journal ArticleDOI
Red-Emissive Organic Crystals of a Single-Benzene Molecule: Elastically Bendable and Flexible Optical Waveguide.
TL;DR: A flexible optical waveguide has been realized in the crystal of polymorph A with a bent shape, highlighting its potential application in flexible devices.
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.
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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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