دورية أكاديمية
Vibrational probe of the origin of singlet exciton fission in TIPS-pentacene solutions.
| العنوان: | Vibrational probe of the origin of singlet exciton fission in TIPS-pentacene solutions. |
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| المؤلفون: | Grieco C; Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Doucette GS; Intercollege Materials Science and Engineering Program, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Munson KT; Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Swartzfager JR; Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Munro JM; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Anthony JE; Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA., Dabo I; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA., Asbury JB; Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. |
| المصدر: | The Journal of chemical physics [J Chem Phys] 2019 Oct 21; Vol. 151 (15), pp. 154701. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Institute of Physics Country of Publication: United States NLM ID: 0375360 Publication Model: Print Cited Medium: Internet ISSN: 1089-7690 (Electronic) Linking ISSN: 00219606 NLM ISO Abbreviation: J Chem Phys Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Publication: New York, NY : American Institute of Physics Original Publication: Lancaster, Pa., American Institute of Physics. |
| مستخلص: | We use native vibrational modes of the model singlet fission chromophore 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-Pn) to examine the origins of singlet fission in solution between molecules that are not tethered by a covalent linkage. We use the C-H stretch modes of TIPS side groups of TIPS-Pn to demonstrate that singlet fission does not occur by diffusive encounter of independent molecules in solution. Instead, TIPS-Pn molecules aggregate in solution through their TIPS side groups. This aggregation breaks the symmetry of the TIPS-Pn molecules and enables the formation of triplets to be probed through the formally symmetry forbidden symmetric alkyne stretch mode of the TIPS side groups. The alkyne stretch modes of TIPS-Pn are sensitive to the electronic excited states present during the singlet fission reaction and provide unique signatures of the formation of triplets following the initial separation of triplet pair intermediates. These findings highlight the opportunity to leverage structural information from vibrational modes to better understand intermolecular interactions that lead to singlet fission. |
| تواريخ الأحداث: | Date Created: 20191024 Date Completed: 20191024 Latest Revision: 20200108 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1063/1.5116586 |
| PMID: | 31640354 |
| قاعدة البيانات: | MEDLINE |
Find this article in full text from Scitation. | تدمد: | 1089-7690 |
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| DOI: | 10.1063/1.5116586 |