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Guerra C, Ayarde‐Henríquez L, Chamorro E, Ensuncho A. Uncovering Triradicaloid Structures in S
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Benzene Photochemistry**. CHEMPHOTOCHEM 2023. [DOI: 10.1002/cptc.202200263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Cristian Guerra
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
- Universidad de Córdoba Facultad de Ciencias Básicas Grupo de Química Computacional Carrera 6 No. 77–305 Montería Córdoba Colombia
| | - Leandro Ayarde‐Henríquez
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
| | - Eduardo Chamorro
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
| | - Adolfo Ensuncho
- Universidad de Córdoba Facultad de Ciencias Básicas Grupo de Química Computacional Carrera 6 No. 77–305 Montería Córdoba Colombia
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Peng Y, Yu W, Feng X, Xu T, Früchtl H, van Mourik T, Kirk SR, Jenkins S. The Cis-Effect Explained Using Next-Generation QTAIM. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27186099. [PMID: 36144830 PMCID: PMC9506152 DOI: 10.3390/molecules27186099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/05/2022] [Accepted: 09/14/2022] [Indexed: 11/22/2022]
Abstract
We used next-generation QTAIM (NG-QTAIM) to explain the cis-effect for two families of molecules: C2X2 (X = H, F, Cl) and N2X2 (X = H, F, Cl). We explained why the cis-effect is the exception rather than the rule. This was undertaken by tracking the motion of the bond critical point (BCP) of the stress tensor trajectories Tσ(s) used to sample the Uσ-space cis- and trans-characteristics. The Tσ(s) were constructed by subjecting the C1-C2 BCP and N1-N2 BCP to torsions ± θ and summing all possible Tσ(s) from the bonding environment. During this process, care was taken to fully account for multi-reference effects. We associated bond-bending and bond-twisting components of the Tσ(s) with cis- and trans-characteristics, respectively, based on the relative ease of motion of the electronic charge density ρ(rb). Qualitative agreement is found with existing experimental data and predictions are made where experimental data is not available.
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Affiliation(s)
- Yuting Peng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Wenjing Yu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Xinxin Feng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Tianlv Xu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Herbert Früchtl
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, Scotland, UK
| | - Tanja van Mourik
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, Scotland, UK
| | - Steven R. Kirk
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
- Correspondence: (S.R.K.); (S.J.)
| | - Samantha Jenkins
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
- Correspondence: (S.R.K.); (S.J.)
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Li Z, Yang Y, Xu T, Früchtl H, van Mourik T, Paterson MJ, Shigeta Y, Kirk SR, Jenkins S. Next generation quantum theory of atoms in molecules for the design of emitters exhibiting thermally activated delayed fluorescence with laser irradiation. J Comput Chem 2022; 43:206-214. [PMID: 34787324 DOI: 10.1002/jcc.26783] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/01/2021] [Accepted: 10/25/2021] [Indexed: 11/05/2022]
Abstract
The effect of a static electric (E)-field and an unchirped and chirped laser pulse field on the cycl[3.3.3]azine molecule was investigated using next-generation quantum theory of atoms in molecules (NG-QTAIM). Despite the magnitude of the E-field of the laser pulses being an order of magnitude lower than for the static E-field, the variation of the energy gap between the lowest lying singlet (S1 ) and triplet (T1 ) excited states was orders of magnitude greater for the laser pulse than for the static E-field. Insights into the response of the electronic structure were captured by NG-QTAIM, where differences in the inverted singlet-triplet gap due to the laser pulses were significant larger compared to those induced by the static E-field. The response of the S1 and T1 excited states, as determined by NG-QTAIM, switched discontinuously between weak and strong chemical character for the static E-field. In contrast, the response to the laser pulses, determined by NG-QTAIM, is to induce a continuous range of chemical character, indicating the unique ability of the laser pulses to induce polarization effects in the form of "mixed" bond types. Our analysis demonstrates that NG-QTAIM is a useful tool for understanding the response to laser irradiation of the lowest-lying singlet S1 and triplet T1 excited states of emitters exhibiting thermally activated delayed fluorescence. The chirped laser pulse led to more frequent instances of the desired outcome of an inverted singlet-triplet gap than the unchirped pulse, indicating its usefulness as a tool to design more efficient organic light-emitting diode devices.
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Affiliation(s)
- Zi Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Yong Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Tianlv Xu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Herbert Früchtl
- EaStCHEM School of Chemistry, University of Saint Andrews, St Andrews, Scotland, UK
| | - Tanja van Mourik
- EaStCHEM School of Chemistry, University of Saint Andrews, St Andrews, Scotland, UK
| | - Martin J Paterson
- Institute of Chemical Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba, Tsukuba, Japan
| | - Steven R Kirk
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
| | - Samantha Jenkins
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Key Laboratory of Resource National and Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, China
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