Kinetic Control over Helical Supramolecular Polymerization Basedon Diamide-functionalized Planarized Triarylboranes

摘要

Planarized triarylboranes with electron-accepting ability and Lewis acidity are attractiveπ-conjugated building blocks for organic electronic materials.Owing to stabilization bystructural constraint of triarylborane skeleton instead of the introduction of bulky substituentsto the boron center,the π-stacking ability of triarylboranes can be improved in the aggregatestate.1 The properties of the aggregate state depend on the spatial arrangement of the π-conjugated molecules in the aggregated structure.Thus,it is important to control the formationof one-dimensional aggregates with controlled structural parameters.In this regard,seedinducedsupramolecular polymerizations are a useful technique,which enables us to kineticallycontrol the initial step of the polymerization.2 In this process,the generation of an out-ofequilibriumstate is an essential requirement to retard the spontaneous assembly of molecules.