Activated Singlet Fission Dictated by Anti-Kasha Property in a Rylene Imide Dye.

التفاصيل البيبلوغرافية
العنوان:	Activated Singlet Fission Dictated by Anti-Kasha Property in a Rylene Imide Dye.
المؤلفون:	Wang K; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China., You X; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China., Miao X; Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.; University of Chinese Academy Sciences, Beijing 100049, China., Yi Y; Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.; University of Chinese Academy Sciences, Beijing 100049, China., Peng S; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China., Wu D; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China.; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China., Chen X; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China.; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China., Xu J; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China.; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China., Sfeir MY; Photonics Initiative, Advanced Science Research Center, City University of New York, New York 10016, United States.; Department of Physics, Graduate Center, City University of New York, New York 10031, United States., Xia J; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, China.; School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China.; International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
المصدر:	Journal of the American Chemical Society [J Am Chem Soc] 2024 May 15; Vol. 146 (19), pp. 13326-13335. Date of Electronic Publication: 2024 May 01.
نوع المنشور:	Journal Article
اللغة:	English
بيانات الدورية:	Publisher: American Chemical Society Country of Publication: United States NLM ID: 7503056 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5126 (Electronic) Linking ISSN: 00027863 NLM ISO Abbreviation: J Am Chem Soc Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة:	Publication: Washington, DC : American Chemical Society Original Publication: Easton, Pa. [etc.]
مستخلص:	A key challenge in the search of new materials capable of singlet fission (SF) arises from the primary energy conservation criterion, i.e., the energy of the triplet exciton has to be half that of the singlet (E(S 1 ) ≥ 2E(T 1 )), which excludes most photostable organic materials from consideration and confines the design strategy to materials with low energy triplet states. One potential way to overcome this energy requirement and improve the triplet energy is to enable a SF channel from higher energy ("hot") excitonic states (S n ) in a process called activated SF. Herein, we demonstrate that efficient activated SF is achieved in a rylene imide-based derivative acenaphth[l, 2-a]acenaphthylene diimide (AADI). This process is enabled by an increase in the energy gap to greater than 1.0 eV between the S 3 and S 1 states due to the incorporation of an antiaromatic pentalene unit, which leads to the emergence of anti-Kasha properties in the isolated molecule. Transient spectroscopy studies show that AADI undergoes ultrafast SF from higher singlet excited states in thin film, with excitation wavelength-dependent SF yields. The SF yield of ∼200% is observed upon higher energy excitation, and long-lived free triplets persist on the μs time scale suggesting that AADI can be used in SF-enhanced devices. Our results suggest that enlarging the S n -S 1 energy gap is an effective way to turn on the activated SF channel and shed light on the development of novel, stable SF materials with high triplet energies.
تواريخ الأحداث:	Date Created: 20240502 Latest Revision: 20240515
رمز التحديث:	20240515
DOI:	10.1021/jacs.4c01732
PMID:	38693621
قاعدة البيانات:	MEDLINE

Find this issue from the American Chemical Society

الوصف
تدمد:	1520-5126
DOI:	10.1021/jacs.4c01732