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ÇINAR ME. Dimeric aza-BODIPY and Dichloro-aza-BODIPY: A DFT Study. GAZI UNIVERSITY JOURNAL OF SCIENCE 2021. [DOI: 10.35378/gujs.846075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Jung J, Liu W, Kim S, Lee D. Redox-Driven Folding, Unfolding, and Refolding of Bis(tetrathiafulvalene) Molecular Switch. J Org Chem 2019; 84:6258-6269. [DOI: 10.1021/acs.joc.9b00541] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jiyoung Jung
- Penn State Scranton, 120 Ridge View Drive, Dunmore, Pennsylvania 18512, United States
| | - Wenjun Liu
- Analytical Research & Development, Merck Research Laboratories, Merck & Company, Incorporation, Rahway, New Jersey 07065, United States
| | - Seyong Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
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Kohler L, Mulfort KL. Photoinduced electron transfer kinetics of linked Ru-Co photocatalyst dyads. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ivanov MV, Wang D, Zhang D, Rathore R, Reid SA. Vertical vs. adiabatic ionization energies in solution and gas-phase: probing ionization-induced reorganization in conformationally-mobile bichromophoric actuators using photoelectron spectroscopy, electrochemistry and theory. Phys Chem Chem Phys 2018; 20:25615-25622. [PMID: 30283939 DOI: 10.1039/c8cp02936a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ionization-induced structural and conformational reorganization in various π-stacked dimers and covalently linked bichromophores is relevant to many processes in biological systems and functional materials. In this work, we examine the role of structural, conformational, and solvent reorganization in a set of conformationally mobile bichromophoric donors, using a combination of gas-phase photoelectron spectroscopy, solution-phase electrochemistry, and density functional theory (DFT) calculations. Photoelectron spectral analysis yields both adiabatic and vertical ionization energies (AIE/VIE), which are compared with measured (adiabatic) solution-phase oxidation potentials (Eox). Importantly, we find a strong correlation of Eox with AIE, but not VIE, reflecting variations in the attendant structural/conformational reorganization upon ionization. A careful comparison of the experimental data with the DFT calculations allowed us to probe the extent of charge stabilization in the gas phase and solution and to parse the reorganizational energy into its various components. This study highlights the importance of a synergistic approach of experiment and theory to study ionization-induced structural and conformational reorganization.
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Affiliation(s)
- Maxim V Ivanov
- Department of Chemistry, Marquette University, Milwaukee, WI 53233, USA.
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Wang D, Talipov MR, Ivanov MV, Mirzaei S, Lindeman SV, Cai S, Rathore R, Reid SA. Molecular Actuators in Action: Electron-Transfer-Induced Conformation Transformation in Cofacially Arrayed Polyfluorenes. J Phys Chem Lett 2018; 9:4233-4238. [PMID: 29985630 DOI: 10.1021/acs.jpclett.8b01918] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
There is much current interest in the design of molecular actuators, which undergo reversible, controlled motion in response to an external stimulus (light, heat, oxidation, etc.). Here we describe the design and synthesis of a series of cofacially arrayed polyfluorenes (MeF nH m) with varied end-capping groups, which undergo redox-controlled electromechanical actuation. Such cofacially arrayed polyfluorenes are a model molecular scaffold to investigate fundamental processes of charge and energy transfer across a π-stacked assembly, and we show with the aid of NMR and optical spectroscopies, X-ray crystallography and DFT calculations that in the neutral state the conformation of MeF nH1 and MeF nH2 is open rather than cofacial, with a conformational dependence that is highly influenced by the local environment. Upon (electro)chemical oxidation, these systems undergo a reversible transformation into a closed fully π-stacked conformation, driven by charge-resonance stabilization of the cationic charge. These findings are expected to aid the design of novel wire-like cofacially arrayed systems capable of undergo redox-controlled actuation.
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Affiliation(s)
- Denan Wang
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Marat R Talipov
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Maxim V Ivanov
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Saber Mirzaei
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Sergey V Lindeman
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Sheng Cai
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Rajendra Rathore
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
| | - Scott A Reid
- Department of Chemistry , Marquette University , Milwaukee , Wisconsin 53201 , United States
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Wang D, Ivanov MV, Mirzaei S, Lindeman SV, Rathore R. An electron-transfer induced conformational transformation: from non-cofacial “sofa” to cofacial “boat” in cyclotetraveratrylene (CTTV) and formation of charge transfer complexes. Org Biomol Chem 2018; 16:5712-5717. [DOI: 10.1039/c8ob01118d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Cyclotetraveratrylene (CTTV) undergoes oxidation-induced folding, consistent with interconversion from a non-cofacial “sofa” conformation to a cofacial “boat” conformer.
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Affiliation(s)
- Denan Wang
- Department of Chemistry
- Marquette University
- Milwaukee
- USA
| | | | - Saber Mirzaei
- Department of Chemistry
- Marquette University
- Milwaukee
- USA
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Talipov MR, Boddeda A, Hossain MM, Rathore R. Quantitative generation of cation radicals and dications using aromatic oxidants: effect of added electrolyte on the redox potentials of aromatic electron donors. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3523] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Marat R. Talipov
- Department of Chemistry; Marquette University; Milwaukee WI 53201-1881 USA
| | - Anitha Boddeda
- Department of Chemistry; Marquette University; Milwaukee WI 53201-1881 USA
| | | | - Rajendra Rathore
- Department of Chemistry; Marquette University; Milwaukee WI 53201-1881 USA
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Talipov MR, Hewage JS, Lindeman SV, Gardinier JR, Rathore R. Comment on “Synthesis, Characterization, and Structures of Persistent Aniline Radical Cation”: It Is a Protonated Aniline and Not an Aniline Radical Cation. Angew Chem Int Ed Engl 2013; 53:938-42. [DOI: 10.1002/anie.201305293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Indexed: 11/07/2022]
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Talipov MR, Hewage JS, Lindeman SV, Gardinier JR, Rathore R. Comment on “Synthesis, Characterization, and Structures of Persistent Aniline Radical Cation”: It Is a Protonated Aniline and Not an Aniline Radical Cation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Navale TS, Thakur K, Vyas VS, Wadumethrige SH, Shukla R, Lindeman SV, Rathore R. Charge delocalization in self-assembled mixed-valence aromatic cation radicals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:71-83. [PMID: 21882882 DOI: 10.1021/la202611w] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The spontaneous assembly of aromatic cation radicals (D(+•)) with their neutral counterpart (D) affords dimer cation radicals (D(2)(+•)). The intermolecular dimeric cation radicals are readily characterized by the appearance of an intervalence charge-resonance transition in the NIR region of their electronic spectra and by ESR spectroscopy. The X-ray crystal structure analysis and DFT calculations of a representative dimer cation radical (i.e., the octamethylbiphenylene dimer cation radical) have established that a hole (or single positive charge) is completely delocalized over both aromatic moieties. The energetics and the geometrical considerations for the formation of dimer cation radicals is deliberated with the aid of a series of cyclophane-like bichromophoric donors with drastically varied interplanar angles between the cofacially arranged aryl moieties. X-ray crystallography of a number of mixed-valence cation radicals derived from monochromophoric benzenoid donors established that they generally assemble in 1D stacks in the solid state. However, the use of polychromophoric intervalence cation radicals, where a single charge is effectively delocalized among all of the chromophores, can lead to higher-order assemblies with potential applications in long-range charge transport. As a proof of concept, we show that a single charge in the cation radical of a triptycene derivative is evenly distributed on all three benzenoid rings and this triptycene cation radical forms a 2D electronically coupled assembly, as established by X-ray crystallography.
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Affiliation(s)
- Tushar S Navale
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
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