Argi polarizatu zirkularra igortzen duten molekula kiral adimendunak

Abstract

The design of molecules and materials able to absorb and mainly emit circularly polarized light is a sought after hot topic in chemistry and materials science. Indeed, many biomolecules are chiral and their performance can be opposite depending on their absolute configuration. In this regard, light endowed with this kind of polarization is able to resolve the involved enantiomers, whereas unpolarized light is not. Advances in organic chemistry have made it posible to access enantiomeric pure chromophores and tailor the modification of their molecular cores to enhance their photonic performance. BINOL and helicene are likely the best known among the organic chiral molecules enabling circular dichroism and circularly polarized luminescence. However, there are still some challenges that should be addressed to boost their optical performance. As a matter of fact, it would be desirable to shift their workable spectral region from the ultraviolet to the red edge of the visible and improve the fluorescence response to enhance the polarized luminescence brightness. In order to achieve these goals, dyes named BODIPY could be suitable candidates thanks to their versatile and rich chemistry which makes it posible to accomplish the required structural modifications. In this paper we introduce two approaches to induce tunable chirality in BODIPYs; helicoBODIPYs and BINOL-O-BODIPYs, and discuss their molecular design motivation as well as their viability as optically active systems.