Organic Polymorphs: One‐Compound‐Based Crystals with Molecular‐Conformation‐ and Packing‐Dependent Luminescent Properties

The present study of structure-property relationships and disclosure of fascinating amplified spontaneous emission (ASE) behavior of an organic molecule not only exhibits the individual effect of molecular conformation and arrangement on the emission properties of the crystal separately, but also indicates that some concealed elegant properties of organic solids can be achieved through manipulating the polymorphic form.