Conformation Directed Interaction Anisotropy Leading to Distinct Bending Behaviors of Two ROY Polymorphs
Manish Kumar Mishra, Changquan Calvin Sun
Abstract
Two conformational polymorphs of 5-methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarbonitrile (ROY) exhibited similar morphology but strikingly different mechanical flexibility, where the yellow needle (YN) is exceptionally elastic while orange needle (ON) is highly brittle. Similar to color differentiation, the distinct bending behaviors of YN and ON polymorphs are linked to different molecular conformations. Aided by crystal structural analysis, interaction energies, topology, nanoindentation, and elastic constant calculation, this study reveals new structural insights that explain the strikingly different mechanical behaviors of the two polymorphs.
Topics & Concepts
NanoindentationCrystallographyAnisotropyBendingPolymorphism (computer science)Molecular dynamicsChemistryMaterials scienceStereochemistryComputational chemistryPhysicsComposite materialOpticsBiochemistryGenotypeGeneCrystallography and molecular interactionsForce Microscopy Techniques and ApplicationsNonlinear Optical Materials Research