Access to the triplet excited states of organic chromophores

Abstract

Triplet excited states, ubiquitous in organic chromophores, can be accessed through various pathways. The feasibility of each pathway is determined by the molecular and electronic structures of the organic chromophores.

Design of BODIPY dyes as triplet photosensitizers: electronic properties tailored for solar energy conversion, photoredox catalysis and photodynamic therapy

“…19) and helicenes, 20,21 will not be discussed in this review; interested readers can refer for instance to recently published reviews. 22,23…”

Halogenation of a twisted non-polar π-system as a tool to modulate phosphorescence at room temperature

“…17,18 In general, the SOC is much greater in heavy element-containing systems due to its dependence on the nuclear charge, which is referred to as the heavy atom effect (HAE). 19 Thus, in many systems containing atoms such as Ir and Pt, ISC and phosphorescence (Ph) are dominant. 10,20,21 However, enhancing SOC in purely organic chromophores through a non-metal HAE using Cl, Br, I, 22,23 and most recently S, Se, and Te [24][25][26] has attracted attention for developing sustainable strategies to induce ISC.…”

Elongation of Triplet Lifetime Caused by Intramolecular Energy Hopping in Diphenylanthracene Dyads Oriented to Undergo Efficient Triplet–Triplet Annihilation Upconversion

“…It is anticipated that a better dyad orientation would also enable a faster TTA through an intramolecular process, though the analysis of TTA process have not reached to the level that reveals an acceleration of kTTA. The original strategy of elongation of tT described in this effort will plays an important role in improving the characteristics of not only TTA-UC systems 45 but also other devices that operate through formation and decay of triplet-excited species 46 such as organic light-emitting diodes 47,48 and organic solar cells. 7,8,49,50 ASSOCIATED CONTENT…”