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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Multiple Mechanical Behaviors in One Crystal of 2,4-Dichlorophenoxyacetic Acid Form II: Thermomechanical Effect and Elastic Deformation
Lan Fang,Jiahao Wei,Zhiqing Li,Yuntian Xiao,Yu Li,Zhen-li Gao,Songgu Wu,Sohrab Rohani,Junbo Gong +8 more
Journal ArticleDOI
AIE in the Halogenated Anils and their Utilization as Fluorescent Probes for Explosive Nitro-aromatics
TL;DR: In this article , the influence of interhalogen bonds on crystal packing was investigated and three halogen-functionalized Anils 1-3 were reported and the Hirshfeld analysis was performed.
Journal ArticleDOI
Isomer Selective Thermosalience and Luminescence Switching in Organic Crystals.
TL;DR: In this article , molecular engineering can transform simple naphthalidenimine-boron complexes into functional materials that exhibit thermosalience and thermal-luminescence switching.
Journal ArticleDOI
Ru II and Ir III Complexes Containing ADA and DAD Triple Hydrogen Bonding Motifs: Potential Tectons for the Assembly of Functional Materials
TL;DR: Spectroscopic studies show that the absorption spectra of the complexes result from combinations of MLCT and LLCT transitions, and low frequency Raman spectra provide further evidence for ordered interactions in the solid state for the L4 complexes.
Journal ArticleDOI
Molecular and crystal structure, lattice energy and DFT calculations of two 2′-(nitrobenzoyloxy)acetophenone isomers
Georgii Bogdanov,Georgii Bogdanov,Jenna Bustos,Viktor Glebov,Evgenii Oskolkov,John P. Tillotson,Tatiana V. Timofeeva +6 more
TL;DR: The two isomers 2′-(4-nitrobenzoyloxy)acetophenone with para and ortho positions of the nitro substituent have been crystallized and it is evident that the variation in the position of theNitro group causes a significant difference in the molecular conformations.
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.
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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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Elastic and bendable caffeine cocrystals: implications for the design of flexible organic materials.
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