دورية أكاديمية
V‑Shaped Tröger Oligothiophenes Boost Triplet Formation by CT Mediation and Symmetry Breaking
| العنوان: | V‑Shaped Tröger Oligothiophenes Boost Triplet Formation by CT Mediation and Symmetry Breaking |
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| المؤلفون: | Samara Medina Rivero, Matías J. Alonso-Navarro, Claire Tonnelé, Jose M. Marín-Beloqui, Fátima Suárez-Blas, Tracey M. Clarke, Seongsoo Kang, Juwon Oh, M. Mar Ramos, Dongho Kim, David Casanova, José L. Segura, Juan Casado |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Biophysics, Biochemistry, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, two thiophene arms, molecular triads since, almost orthogonal disposition, stationary excited states, efficiently producing singlet, display appreciable isc, state stationary, triplet coupling, terminated oligothiophenes, results show, resolved spectroscopies, organic chromophores, oligothiophene branches, nitrogen atoms, new family, molecules obtained, isc efficiency, different lengths, diazocine unit, dependent mechanisms, ct mediation, breaking process, base unit, base derivatives |
| الوصف: | A new family of molecules obtained by coupling Tröger’s base unit with dicyanovinylene-terminated oligothiophenes of different lengths has been synthesized and characterized by steady-state stationary and transient time-resolved spectroscopies. Quantum chemical calculations allow us to interpret and recognize the properties of the stationary excited states as well as the time-dependent mechanisms of singlet-to-triplet coupling. The presence of the diazocine unit in Tröger’s base derivatives is key to efficiently producing singlet-to-triplet intersystem crossing mediated by the role of the nitrogen atoms and of the almost orthogonal disposition of the two thiophene arms. Spin–orbit coupling-mediated interstate intersystem crossing (ISC) is activated by a symmetry-breaking process in the first singlet excited state with partial charge transfer character. This mechanism is a characteristic of these molecular triads since the independent dicyanovinylene-oligothiophene branches do not display appreciable ISC. These results show how Tröger’s base coupling of organic chromophores can be used to improve the ISC efficiency and tune their photophysics. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/V_Shaped_Tro_ger_Oligothiophenes_Boost_Triplet_Formation_by_CT_Mediation_and_Symmetry_Breaking/24767246Test |
| DOI: | 10.1021/jacs.3c06916.s001 |
| الإتاحة: | https://doi.org/10.1021/jacs.3c06916.s001Test https://figshare.com/articles/journal_contribution/V_Shaped_Tro_ger_Oligothiophenes_Boost_Triplet_Formation_by_CT_Mediation_and_Symmetry_Breaking/24767246Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.FD93CC0A |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/jacs.3c06916.s001 |
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