01571nas a2200145   4500008004100000245009500041210006900136260000800205300001600213490000700229520101700236100002301253700003001276856011901306       2017                        eng d00aSelf-assembled spheres, flowers, and fibers from the same backbone and similar side chains0 aSelfassembled spheres flowers and fibers from the same backbone   cNOV  a13401-134060 v333 aRylene imides (Ms) self-assemble into various nanostructures. Often, the synthesis of unsymmetrical RIs (URIs) is required to achieve nanostructures. However, the synthesis of URIs is nontrivial. Thus, a structurally similar alternative is desirable. iso-Indigo (i-indigo) has a pi core and lactam rings that are structurally similar to the RIs. Unsymmetrical iso-indigo (i-indigo) can be easily synthesized by condensing oxindole and isatin. We have synthesized a series of unsymmetrical i-indigo molecules. In these molecules, the pi-pi interaction, hydrogen bonding, and van der Waals interactions are in operation. Because of these, the molecules self-assemble into spheres, fibers, and dahlia flower morphologies. If the hydrogen bonding interaction is disrupted, then all of them form fibers. Control experiments indicate that the complete absence of hydrogen bonding is deleterious to self-assembly. We also show that the lower analogs of i-indigo are not sufficient to form self-assembled nanostructures.1 aSingh, Anup, Kumar1 aKrishnamoorthy, Kothandam  uhttps://library.ncl.res.in/content/self-assembled-spheres-flowers-and-fibers-same-backbone-and-similar-side-chains