Yu, Yi; Mallick, Suman; Wang, Mao; Boerjesson, Karl published their research in Nature Communications in 2021. The article was titled 《Barrier-free reverse-intersystem crossing in organic molecules by strong light-matter coupling》.HPLC of Formula: 624-28-2 The article contains the following contents:
Strong light-matter coupling provides the means to challenge the traditional rules of chem. In particular, an energy inversion of singlet and triplet excited states would be fundamentally remarkable since it would violate the classical Hund’s rule. An organic chromophore possessing a lower singlet excited state can effectively harvest the dark triplet states, thus enabling 100% internal quantum efficiency in elec. pumped light-emitting diodes and lasers. Here we demonstrate unambiguously an inversion of singlet and triplet excited states of a prototype mol. by strong coupling to an optical cavity. The inversion not only implies that the polaritonic state lies at a lower energy, but also a direct energy pathway between the triplet and polaritonic states is opened. The intrinsic photophysics of reversed-intersystem crossing are thereby completely overturned from an endothermic process to an exothermic one. By doing so, we show that it is possible to break the limit of Hund’s rule and manipulate the energy flow in mol. systems by strong light-matter coupling. Our results will directly promote the development of organic light-emitting diodes based on reversed-intersystem crossing. Moreover, we anticipate that it provides the pathway to the creation of elec. pumped polaritonic lasers in organic systems. The experimental process involved the reaction of 2,5-Dibromopyridine(cas: 624-28-2HPLC of Formula: 624-28-2)
2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.HPLC of Formula: 624-28-2