A Study of Unusual Super-Large Red-Shifted absorption in quinoid molecules based supramolecular chiral assemblies for NIR-range chiral optoelectronic device application
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Recently, organic conjugated molecules-based NIR chiral optoelectronic devices have been studied for diverse applications due to their advantages such as data multiplicity, low interference, lower energy operation. However, it is difficult to extend the absorption into the longer wavelength NIR region with conventional conjugated molecules due to their low stability and synthesis complexities. To solve this problem, we synthesized quinoid-based two molecules, QuEDOT-(S)-Cn and QuPheDOT-(S)-Cn. In QuPheDOT-(S)-Cn molecule, it exhibits unusually super-large red-shifted absorption by controlling its core structure. As a result, it has a significant absorption shift over 200nm in its supramolecular assembly. Furthermore, it is also optically active at the extended absorption wavelength. We will explain the relationship between the behavior of enormous red-shifted absorption and chemical structures. These results suggest distinctive chemical designing strategies for chiral materials with NIR absorption of more than 1000nm.