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Dellai A, Naim C, Cerezo J, Prampolini G, Castet F. Dynamic effects on the nonlinear optical properties of donor acceptor stenhouse adducts: insights from combined MD + QM simulations. Phys Chem Chem Phys 2024; 26:13639-13654. [PMID: 38511505 DOI: 10.1039/d4cp00310a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
The second-order nonlinear optical (NLO) responses of a donor-acceptor stenhouse adduct (DASA) are investigated by using a computational approach combining molecular dynamics simulations and density functional theory (DFT) calculations. Specific force fields for the open and closed photoswitching forms are first parameterized and validated according to the Joyce protocol, in order to finely reproduce the geometrical features and potential energy surfaces of both isomers in chloroform solution. Then, DFT calculations are performed on structural snapshots extracted at regular time steps of the MD trajectories to address the influence of the thermalized conformational dynamics on the NLO responses related to hyper-Rayleigh scattering (HRS) experiments. We show that accounting for the structural dynamics largely enhances the HRS hyperpolarizability (βHRS) compared to DFT calculations considering solely equilibrium geometries, and greatly improves the agreement with experimental measurements. Furthermore, we show that the NLO responses of the NLO-active open form are correlated with the bond order alternation along the triene bridge connecting the donor and acceptor moieties, which is rationalized using simple essential state models.
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Affiliation(s)
- Angela Dellai
- Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires, UMR 5255, F-33400 Talence, France.
| | - Carmelo Naim
- Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires, UMR 5255, F-33400 Talence, France.
- Donostia International Physics Center (DIPC), Manuel Lardizabal Ibilbidea 4, 20018 Donostia, Euskadi, Spain
| | - Javier Cerezo
- Departamento de Química and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | | | - Frédéric Castet
- Univ. Bordeaux, CNRS, Bordeaux INP, Institut des Sciences Moléculaires, UMR 5255, F-33400 Talence, France.
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Dubuis S, Dellai A, Courdurié C, Owona J, Kalafatis A, Vellutini L, Genin E, Rodriguez V, Castet F. Nonlinear Optical Responses of Photoswitchable Donor-Acceptor Stenhouse Adducts. J Am Chem Soc 2023; 145:10861-10871. [PMID: 37141624 DOI: 10.1021/jacs.3c02778] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
This work combines hyper-Rayleigh scattering (HRS) experiments performed in the NIR range (1.30 and 1.60 μm) and quantum chemical calculations to provide a comprehensive description of the second harmonic generation (SHG) responses of donor-acceptor Stenhouse adducts (DASAs). Representative derivatives of the three generations of DASAs, which differ by the nature of their electron-donating and withdrawing moieties and also include clickable species, have been synthesized and their photoswitching behavior fully characterized. The HRS measurements allow us to establish relationships between the magnitude of the SHG response of open forms and the nature of the donor and acceptor groups. The largest SHG responses are obtained for derivatives incorporating either a barbituric acid or an indanedione acceptor unit, while N-methylaniline appears as the most efficient donor group. The calculations support well the experimental data and show that high hyperpolarizabilities are associated to low excitation energies and large extent of the photoinduced intramolecular charge transfer, which enhances the dipole moment variation between the ground and first dipole-allowed electronic excited state. In addition, a complete investigation of the photoswitching kinetics of DASAs in chloroform solution shows important differences, highlighting in particular the role of the donor group on the photoswitching efficiency.
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Affiliation(s)
- Simon Dubuis
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Angela Dellai
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Chloé Courdurié
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Josianne Owona
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Apostolos Kalafatis
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Luc Vellutini
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Emilie Genin
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Vincent Rodriguez
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
| | - Frédéric Castet
- Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33405 Cedex Talence, France
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Li Y, Zhu C, Gu F, Liu F. Revisiting photocyclization of the donor-acceptor stenhouse adduct: missing pieces in the mechanistic jigsaw discovered. Phys Chem Chem Phys 2023; 25:7417-7422. [PMID: 36847409 DOI: 10.1039/d2cp05143e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Donor-acceptor Stenhouse adducts (DASA) have recently emerged as a class of visible-light-induced photochromic molecular switches, but their photocyclization mechanism remains puzzling and incomplete. In this work, we carried out MS-CASPT2//SA-CASSCF calculations to reveal the complete mechanism of the dominant channels and possible side reactions. We found that a new thermal-then-photo isomerization channel, i.e., EEZ → EZZ → EZE, other than the commonly accepted EEZ → EEE → EZE channel, is dominant in the initial step. Besides, our calculations rationalized why the expected byproducts ZEZ and ZEE are unobserved and proposed a competitive stepwise channel for the final ring-closure step. The findings here redraw the mechanistic picture of the DASA reaction by better accounting for experimental observations, and more importantly, provide critical physical insight in understanding the interplay between thermal- and photo-induced processes widely present in photochemical synthesis and reactions.
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Affiliation(s)
- Yazhen Li
- Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, P. R. China. .,Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
| | - Chaoyuan Zhu
- Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, P. R. China.
| | - Fenglong Gu
- Key Laboratory of Theoretical Chemistry of Environment, School of Environment, South China Normal University, Guangzhou 510006, P. R. China.
| | - Fengyi Liu
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, P. R. China.
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Castagna R, Maleeva G, Pirovano D, Matera C, Gorostiza P. Donor-Acceptor Stenhouse Adduct Displaying Reversible Photoswitching in Water and Neuronal Activity. J Am Chem Soc 2022; 144:15595-15602. [PMID: 35976640 DOI: 10.1021/jacs.2c04920] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interest in the photochromism and functional applications of donor-acceptor Stenhouse adducts (DASAs) soared in recent years owing to their outstanding advantages and flexible design. However, their low solubility and irreversible conversion in aqueous solutions hampered exploring DASAs for biology and medicine. It is notably unknown whether the barbiturate electron acceptor group retains the pharmacological activity of drugs such as phenobarbital, which targets γ-aminobutyric acid (GABA)-type A receptors (GABAARs) in the brain. Here, we have developed the model compound DASA-barbital based on a scaffold of red-switching second-generation DASAs, and we demonstrate that it is active in GABAARs and alters the neuronal firing rate in a physiological medium at neutral pH. DASA-barbital can also be reversibly photoswitched in acidic aqueous solutions using cyclodextrin, an approved ingredient of drug formulations. These findings clarify the path toward the biological applications of DASAs and to exploit the versatility displayed in polymers and materials science.
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Affiliation(s)
- Rossella Castagna
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology, Baldiri Reixac 10-12, Barcelona 08028, Spain.,CIBER, Madrid 282029, Spain
| | - Galyna Maleeva
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology, Baldiri Reixac 10-12, Barcelona 08028, Spain
| | - Deborah Pirovano
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology, Baldiri Reixac 10-12, Barcelona 08028, Spain
| | - Carlo Matera
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology, Baldiri Reixac 10-12, Barcelona 08028, Spain.,CIBER, Madrid 282029, Spain
| | - Pau Gorostiza
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute for Science and Technology, Baldiri Reixac 10-12, Barcelona 08028, Spain.,CIBER, Madrid 282029, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Barcelona 08010, Spain
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Gong Y, Zhang M, Jia X, Yue B, Zhu L. Rigid Polymer Network-Based Autonomous Photoswitches Working in the Solid State Encoded by Room-Temperature Phosphorescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14398-14406. [PMID: 34851633 DOI: 10.1021/acs.langmuir.1c02347] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Autonomous molecular switches with self-recoverability are of great theoretical and experimental interest since they can avoid additional chemical or energy imposition during the working process. Due to the high energy barrier, however, the solid state is generally unfavorable for materials to exhibit the autonomous switch behavior. To promote the practical usage of the autonomous molecular switch, herein, we propose a prototype of an autonomous photoswitch that can work in the solid state based on a rigid polymer network. A hexacarboxylic sodium-modified hexathiobenzene compound was employed as a photoexcitation-driven unit, which can undergo molecular aggregation upon irradiation because of the distinct conformational difference between the ground state and the photoexcited state. Then, we selected a relatively rigid polymer named poly(dimethyldiallylammonium)chloride (PDDA) to complex with the hexacarboxylic sodium-modified hexathiobenzene through electrostatic coupling. Through optimization, the photoexcitation-controlled molecular aggregation and its self-recovery can work well in the solid matrix of PDDA under rhythmical photoirradiation. This process can be easily encoded by a self-recoverable room-temperature phosphorescence, featuring an excellent performance of the autonomous switch.
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Affiliation(s)
- Yifan Gong
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Man Zhang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xiaoyong Jia
- Henan Key Laboratory of Photovoltaic Materials, Henan University, 475004 Kaifeng, P. R. China
| | - Bingbing Yue
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
- University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
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