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- Title
Energy Barriers and Gap Between Two Excited States in a Dual‐Emissive Carborane.
- Authors
Zhao, Xueyuan; Zhang, Xinning; Li, Xin; Wu, Lin; Ji, Lei
- Abstract
A thorough understanding of the internal conversion process between excited states is important for the designing of ideal multiple‐emissive materials. However, it is hard to experimentally measure both the energy barriers and gaps between the excited states of a compound. For a long time, it is dubious if what was measured is the energy gap or barrier between two excited states. In this paper, we designed 1‐(pyren‐2'‐yl)‐9,12‐di(p‐tolyl)‐o‐carborane (2), which shows dual‐emission in solution. Temperature‐dependent fluorescence measurements show that the two emission bands in hexane are corresponding to two different excited states. The ratio of the emission bands is controlled by thermodynamics at higher temperatures and by kinetics at lower temperatures. Thus, the energy barrier and energy gaps between the two excited states of 2 can be experimentally estimated.
- Subjects
EXCITED states; ACTIVATION energy; DELAYED fluorescence
- Publication
Chemistry - A European Journal, 2024, Vol 30, Issue 35, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202401246