View : 893 Download: 0
Aggregation of an n-π∗ Molecule Induces Fluorescence Turn-on
- Title
- Aggregation of an n-π∗ Molecule Induces Fluorescence Turn-on
- Authors
- Jhun B.H.; Yi S.Y.; Jeong D.; Cho J.; Park S.Y.; You Y.
- Ewha Authors
- 유영민
- SCOPUS Author ID
- 유영민
- Issue Date
- 2017
- Journal Title
- Journal of Physical Chemistry C
- ISSN
- 1932-7447
- Citation
- Journal of Physical Chemistry C vol. 121, no. 21, pp. 11907 - 11914
- Publisher
- American Chemical Society
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- Although n-π∗ molecules can serve as electroluminescent materials because of the harvesting of singlet and triplet excitons through El-Sayed-rule-allowed reverse intersystem crossing, the weak fluorescence emissions of such molecules have prevented applications into devices. We have discovered a 1 order of magnitude enhancement of the fluorescence of a prototypical n-π∗ fluorophore, 7-phenylcoumarin (PC), upon aggregation. We performed a mechanistic study consisting of structural, photophysical, and quantum chemical investigations, and found that the aggregation positioned the fluorescent electronic state below the nonemissive triplet n-π∗ transition state. Our studies, for the first time, demonstrate intramolecular geometry and intermolecular arrangements in the solid state to be significant factors in the photoluminescence quantum yields of n-π∗ fluorophores. © 2017 American Chemical Society.
- DOI
- 10.1021/acs.jpcc.7b02797
- Appears in Collections:
- 공과대학 > 화공신소재공학과 > Journal papers
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML