1 research outputs found
Correlating the Structural and Photophysical Properties of Ortho
The role of the carborane isomer is investigated on the structural and photophysical properties of molecules comprising a carborane cluster and a conjugated organic moiety is investigated by synthesizing isomeric oâ, mâ, and pâcarboranylâanthracene donorâacceptor dyads. While appending a carborane leads to emission from a low energy intramolecular charge transfer state for the oâisomer, as well as emission from an excited state localized on the anthracene, this is not the case for the mâ and pâcarborane derivatives. This difference is attributed to a lower electron affinity for the latter two isomers. However, adding both mâ and pâ deforms the aromatic backbone and increases its structural rigidity, reducing nonâradiative decay pathways and hence enhancing photoluminescence quantum efficiency relative to anthracene