1
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Clerc M, Sandlass S, Rifaie-Graham O, Peterson JA, Bruns N, Read de Alaniz J, Boesel LF. Visible light-responsive materials: the (photo)chemistry and applications of donor-acceptor Stenhouse adducts in polymer science. Chem Soc Rev 2023; 52:8245-8294. [PMID: 37905554 PMCID: PMC10680135 DOI: 10.1039/d3cs00508a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Indexed: 11/02/2023]
Abstract
Donor-acceptor Stenhouse adduct (DASA) photoswitches have gained a lot of attention since their discovery in 2014. Their negative photochromism, visible light absorbance, synthetic tunability, and the large property changes between their photoisomers make them attractive candidates over other commonly used photoswitches for use in materials with responsive or adaptive properties. The development of such materials and their translation into advanced technologies continues to widely impact forefront materials research, and DASAs have thus attracted considerable interest in the field of visible-light responsive molecular switches and dynamic materials. Despite this interest, there have been challenges in understanding their complex behavior in the context of both small molecule studies and materials. Moreover, incorporation of DASAs into polymers can be challenging due to their incompatibility with the conditions for most common polymerization techniques. In this review, therefore, we examine and critically discuss the recent developments and challenges in the field of DASA-containing polymers, aiming at providing a better understanding of the interplay between the properties of both constituents (matrix and photoswitch). The first part summarizes current understanding of DASA design and switching properties. The second section discusses strategies of incorporation of DASAs into polymers, properties of DASA-containing materials, and methods for studying switching of DASAs in materials. We also discuss emerging applications for DASA photoswitches in polymeric materials, ranging from light-responsive drug delivery systems, to photothermal actuators, sensors and photoswitchable surfaces. Last, we summarize the current challenges in the field and venture on the steps required to explore novel systems and expand both the functional properties and the application opportunities of DASA-containing polymers.
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Affiliation(s)
- Michèle Clerc
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, 9014 St. Gallen, Switzerland.
- University of Fribourg, Department of Chemistry, 1700 Fribourg, Switzerland
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK
- Swiss National Center of Competence in Research Bio-Inspired Materials, Switzerland
| | - Sara Sandlass
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
| | - Omar Rifaie-Graham
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | - Julie A Peterson
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
| | - Nico Bruns
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK
- Swiss National Center of Competence in Research Bio-Inspired Materials, Switzerland
- Department of Chemistry, Technical University of Darmstadt, 64287 Darmstadt, Germany.
| | - Javier Read de Alaniz
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA.
| | - Luciano F Boesel
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, 9014 St. Gallen, Switzerland.
- Swiss National Center of Competence in Research Bio-Inspired Materials, Switzerland
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2
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Sirvinskaite G, Nardo CS, Müller P, Gasser AC, Morandi B. Direct Synthesis of Unprotected Indolines Through Intramolecular sp 3 C-H Amination Using Nitroarenes as Aryl Nitrene Precursors. Chemistry 2023; 29:e202301978. [PMID: 37404217 DOI: 10.1002/chem.202301978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/03/2023] [Accepted: 07/03/2023] [Indexed: 07/06/2023]
Abstract
Given the prevalence of molecules containing nitro groups in organic synthesis, innovative methods to expand the reactivity of this functional group are of interest in both industrial and academic settings. In this report, a metal-free intramolecular benzylic sp3 C-H amination is disclosed using aryl nitro compounds as aryl nitrene precursors. Organosilicon reagent N,N'-bis(trimethylsilyl)-4,4'-bipyridinylidene (Si-DHBP) served as an efficient reductant in the transformation, enabling the in situ generation of aryl nitrene species for the direct, metal-free synthesis of unprotected 2-arylindolines from the corresponding nitroarene compounds.
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Affiliation(s)
- Giedre Sirvinskaite
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Celine S Nardo
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Patrick Müller
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Aurelio C Gasser
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
| | - Bill Morandi
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland
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3
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Clerc M, Tekin C, Ulrich S, Freire RVM, Salentinig S, Bruns N, Boesel LF. Donor-Acceptor Stenhouse Adduct-Polydimethylsiloxane-Conjugates for Enhanced Photoswitching in Bulk Polymers. Macromol Rapid Commun 2022; 43:e2200120. [PMID: 35396766 DOI: 10.1002/marc.202200120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/14/2022] [Indexed: 11/09/2022]
Abstract
Donor-acceptor Stenhouse adducts (DASAs) are a rapidly emerging class of visible light-activated photochromes and DASA-functionalized polymers hold great promise as biocompatible photoresponsive materials. However, the photoswitching performance of DASAs in solid polymer matrices is often low, particularly in polymeric materials below their glass transition temperature. To overcome this limitation, DASAs are conjugated to polydimethylsiloxanes which have a glass transition temperature far below room temperature and which can create a mobile molecular environment around the DASAs for achieving more solution-like photoswitching kinetics in bulk polymers. The dispersion of DASAs conjugated to such flexible oligomers into solid polymer matrices allows for more effective and tunable DASA photoswitching in stiff polymers, such as poly(methyl methacrylate), without requiring modifications of the matrix. The photoswitching of conjugates with varying polymer molecular weight, linker type and architecture is characterized via time-dependent UV-Vis spectroscopy in organic solvents and blended into polymethacrylate films. In addition, DASA-functionalized polydimethylsiloxane networks that are accessible by the same synthetic route provide an alternative solution for achieving fast and efficient DASA photoswitching in the bulk owing to their intrinsic softness and flexibility. These findings may contribute to the development of DASA-functionalized materials with better tunable, more effective, and more reversible modulation of their optical properties. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Michèle Clerc
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland.,University of Fribourg, Department of Chemistry, Chemin du Musée 9, Fribourg, 1700, Switzerland.,Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
| | - Cem Tekin
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
| | - Sebastian Ulrich
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
| | - Rafael V M Freire
- University of Fribourg, Department of Chemistry, Chemin du Musée 9, Fribourg, 1700, Switzerland
| | - Stefan Salentinig
- University of Fribourg, Department of Chemistry, Chemin du Musée 9, Fribourg, 1700, Switzerland
| | - Nico Bruns
- Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
| | - Luciano F Boesel
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
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4
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Zheng C, Yu Y, Kuang S, Zhu B, Zhou H, Zhang SQ, Yang J, Shi L, Ran C. β-Amyloid Peptides Manipulate Switching Behaviors of Donor-Acceptor Stenhouse Adducts. Anal Chem 2021; 93:9887-9896. [PMID: 34235921 DOI: 10.1021/acs.analchem.1c01957] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Molecular switching plays a critical role in biological and displaying systems. Donor-acceptor Stenhouse adducts (DASAs) is a newly re-discovered series of switchable photochromes, and light is the most used approach to control its switching behavior. In this report, we speculated that hydrophobic binding pockets of biologically relevant peptides/proteins could be harnessed to alter its switching behavior without the assistance of light. We designed and synthesized a DASA compound SHA-2, and we demonstrated that the Aβ40 species could stabilize SHA-2 in the linear conformation and decrease the rate of molecular switching via fluorescence spectral studies. Moreover, molecular dynamics simulation revealed that SHA-2 could bind to the hydrophobic fragment of the peptide and resulted in substantial changes in the tertiary structure of Aβ40 monomer. This structural change is likely to impede the aggregation of Aβ40, as evidenced by the results from thioflavin T fluorescence and ProteoStat aggregation detection experiments. We believe that our study opens a new window to alter the switching behavior of DASA via DASA-peptide/protein interactions.
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Affiliation(s)
- Chao Zheng
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States.,PET Center, Department of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut 06520, United States
| | - Yue Yu
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
| | - Shi Kuang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
| | - Biyue Zhu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
| | - Heng Zhou
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
| | - Shao-Qing Zhang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
| | - Jing Yang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
| | - Liang Shi
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
| | - Chongzhao Ran
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, Massachusetts 02129, United States
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5
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Alves J, Wiedbrauk S, Barner‐Kowollik C, Blinco JP. The Missing Piece: Concentration Dependence of Donor‐Acceptor Stenhouse Adduct (DASA) Reactivity. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jessica Alves
- Centre for Materials Science Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- School of Chemistry and Physics Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - Sandra Wiedbrauk
- Centre for Materials Science Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- School of Chemistry and Physics Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - Christopher Barner‐Kowollik
- Centre for Materials Science Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- School of Chemistry and Physics Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - James P. Blinco
- Centre for Materials Science Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- School of Chemistry and Physics Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
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6
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Connolly SW, Tiwari R, Holder SJ, Shepherd HJ. A simple strategy to overcome concentration dependence of photoswitching properties in donor-acceptor Stenhouse adducts. Phys Chem Chem Phys 2021; 23:2775-2779. [PMID: 33492320 DOI: 10.1039/d0cp06312f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Photoswitchable donor-acceptor Stenhouse adducts (DASAs) have been reported to exhibit an undesirable concentration dependence, where photoswitching is greatly inhibited with increasing photochrome concentration. Here we show that the use of piperazine-based donor moieties eliminates this concentration dependence and results in complete, rapid and reversible photoswitching behaviour for first generation DASAs, even in chlorinated solvents. Structural data and computational studies reveal proton transfer during isomerisation to the terminal amine rather than the donor amine. The improvement in photoswitching efficiency is attributed to resultant differences in supramolecular association.
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Affiliation(s)
- Sean W Connolly
- School of Physical Sciences, University of Kent, Canterbury, CT2 7NH, UK.
| | - Rahul Tiwari
- School of Physical Sciences, University of Kent, Canterbury, CT2 7NH, UK. and School of Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK
| | - Simon J Holder
- School of Physical Sciences, University of Kent, Canterbury, CT2 7NH, UK.
| | - Helena J Shepherd
- School of Physical Sciences, University of Kent, Canterbury, CT2 7NH, UK.
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7
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Yap JE, Zhang L, Lovegrove JT, Beves JE, Stenzel MH. Visible Light-Responsive Drug Delivery Nanoparticle via Donor-Acceptor Stenhouse Adducts (DASA). Macromol Rapid Commun 2020; 41:e2000236. [PMID: 32776488 DOI: 10.1002/marc.202000236] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/30/2020] [Accepted: 07/06/2020] [Indexed: 12/15/2022]
Abstract
Stimuli-responsive drug release from a nanocarrier triggered by light enables the control of the amount of drug locally. Here, block copolymer micelles based on poly(ethylene glycol) methyl ether methacrylate (PEGMEMA) as the hydrophilic block and a polymer with pendant donor-acceptor Stenhouse adducts (DASA) are used as a means to trigger the release of drugs under green light. The micelles are loaded with ellipticine to yield light-responsive nanoparticles with sizes of around 35 nm according to transmission electron microscopy (TEM) analysis. Two micelles with a drug loading content of 4.75 and 7.4 wt% are prepared, but the micelle with the higher drug loading content leads to substantial protein adsorption. The release of ellipticine from the micelle, which is monitored using the polarity-sensitive fluorescence of ellipticine, can be switched on by light and off by thermal recovery of DASA in the dark. The micelles are readily taken up by Michigan Cancer Foundation-7 breast cancer cells. Subsequent light irradiation leads to enhanced drug release inside the cell as seen by the enhanced fluorescence.
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Affiliation(s)
- Jeaniffer E Yap
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Lin Zhang
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Jordan T Lovegrove
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Jonathon E Beves
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Martina H Stenzel
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemistry, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
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8
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Mallo N, Tron A, Andréasson J, Harper JB, Jacob LSD, McClenaghan ND, Jonusauskas G, Beves JE. Hydrogen‐Bonding Donor‐Acceptor Stenhouse Adducts. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.201900295] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Neil Mallo
- School of Chemistry UNSW Sydney Sydney NSW 2052 Australia
| | - Arnaud Tron
- Univ. Bordeaux/CNRS 351 cours de la Libération 33405 Talence Cedex France
| | - Joakim Andréasson
- Department of Chemistry and Chemical Engineering Chalmers University of Technology 412 96 Göteborg Sweden
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9
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Chen Q, Diaz YJ, Hawker MC, Martinez MR, Page ZA, Xiao-An Zhang S, Hawker CJ, Read de Alaniz J. Stable Activated Furan and Donor–Acceptor Stenhouse Adduct Polymer Conjugates as Chemical and Thermal Sensors. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00533] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Qiaonan Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | | | | | | | | | - Sean Xiao-An Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
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10
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Yap JE, Mallo N, Thomas DS, Beves JE, Stenzel MH. Comparing photoswitching of acrylate or methacrylate polymers conjugated with donor–acceptor Stenhouse adducts. Polym Chem 2019. [DOI: 10.1039/c9py01345h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Polymers with donor–acceptor Stenhouse adduct (DASA) groups were synthesized using RAFT methods to evaluate the effect of polymer length (20 vs. 100 DP units) and backbone rigidity (acrylate and methacrylate blocks).
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Affiliation(s)
| | - Neil Mallo
- The University of New South Wales
- Sydney
- Australia
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11
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Mallo N, Foley ED, Iranmanesh H, Kennedy ADW, Luis ET, Ho J, Harper JB, Beves JE. Structure-function relationships of donor-acceptor Stenhouse adduct photochromic switches. Chem Sci 2018; 9:8242-8252. [PMID: 30542573 PMCID: PMC6240811 DOI: 10.1039/c8sc03218a] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 08/28/2018] [Indexed: 12/15/2022] Open
Abstract
The first in-depth, systematic study of the photoswitching properties of Donor-Acceptor Stenhouse Adducts (DASAs) is reported. Barbituric acid derived DASAs functionalised with 14 different amines ranging from dimethylamine to 4-methoxy-N-methylaniline were structurally characterised in solution using 1H and 13C NMR spectroscopy and, in eight cases, in the solid state by single crystal X-ray diffraction. The distribution of coloured and colourless isomers in the dark, their photostationary states under irradiation, apparent thermal half-lives, and fatigue resistance are systematically compared. A simple kinetic model is used to characterise photoswitching behaviour and reveals that minor structural modifications can significantly improve the photoswitching properties of DASA photochromes. These modifications result in excellent photoswitching properties for '1st generation' DASAs in chloroform, including exceptional fatigue resistance, opening the door for these photochromic molecules to find widespread applications.
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Affiliation(s)
- Neil Mallo
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Eric D Foley
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Hasti Iranmanesh
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Aaron D W Kennedy
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Ena T Luis
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Junming Ho
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Jason B Harper
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
| | - Jonathon E Beves
- School of Chemistry , UNSW Sydney , High St, Kensington , Sydney , NSW , Australia .
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12
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Lerch MM, Szymański W, Feringa BL. The (photo)chemistry of Stenhouse photoswitches: guiding principles and system design. Chem Soc Rev 2018; 47:1910-1937. [PMID: 29468232 DOI: 10.1039/c7cs00772h] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Molecular photoswitches comprise chromophores that can be interconverted reversibly with light between two states with different photochemical and physicochemical properties. This feature renders them useful for diverse applications, ranging from materials science, biology (specifically photopharmacology) to supramolecular chemistry. With new and more challenging systems to control, especially extending towards biomedical applications, using visible or near-infrared light for photoswitch activation becomes vital. Donor-acceptor Stenhouse adducts are a novel class of visible light-responsive negative photochromes that provide a possible answer to current limitations of other photoswitch classes in the visible and NIR window. Their rapid development since their discovery in 2014, together with first successful examples of applications, demonstrate both their potential and areas where improvements are needed. A better understanding of DASA characteristics and its photoswitching mechanism has revealed that they are in fact a subset of a more general structural class of photochromes, namely Stenhouse photoswitches. This tutorial review aims at providing an introduction and practical guide on DASAs: it focuses on their structure and synthesis, provides fundamental insights for understanding their photoswitching behavior and demonstrates guiding principles for tailoring these switches for given applications.
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Affiliation(s)
- Michael M Lerch
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
| | - Wiktor Szymański
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands. and Department of Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - Ben L Feringa
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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13
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Bull JN, Carrascosa E, Mallo N, Scholz MS, da Silva G, Beves JE, Bieske EJ. Photoswitching an Isolated Donor-Acceptor Stenhouse Adduct. J Phys Chem Lett 2018; 9:665-671. [PMID: 29356541 DOI: 10.1021/acs.jpclett.7b03402] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Donor-acceptor Stenhouse adducts (DASAs) are a new class of photoswitching molecules with excellent fatigue resistance and synthetic tunability. Here, tandem ion mobility mass spectrometry coupled with laser excitation is used to characterize the photocyclization reaction of isolated, charge-tagged DASA molecules over the 450-580 nm range. The experimental maximum response at 530 nm agrees with multireference perturbation theory calculations for the S1 ← S0 transition maximum at 533 nm. Photocyclization in the gas phase involves absorption of at least two photons; the first photon induces Z-E isomerization from the linear isomer to metastable intermediate isomers, while the second photon drives another E-Z isomerization and 4π-electrocyclization reaction. Cyclization is thermally reversible in the gas phase with collisional excitation.
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Affiliation(s)
- James N Bull
- School of Chemistry, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Eduardo Carrascosa
- School of Chemistry, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Neil Mallo
- School of Chemistry, UNSW Sydney , High Street, Kensington, New South Wales 2052, Australia
| | - Michael S Scholz
- School of Chemistry, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Gabriel da Silva
- Department of Chemical Engineering, University of Melbourne , Parkville, Victoria 3010, Australia
| | - Jonathon E Beves
- School of Chemistry, UNSW Sydney , High Street, Kensington, New South Wales 2052, Australia
| | - Evan J Bieske
- School of Chemistry, University of Melbourne , Parkville, Victoria 3010, Australia
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14
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Di Donato M, Lerch MM, Lapini A, Laurent AD, Iagatti A, Bussotti L, Ihrig SP, Medved’ M, Jacquemin D, Szymański W, Buma WJ, Foggi P, Feringa BL. Shedding Light on the Photoisomerization Pathway of Donor-Acceptor Stenhouse Adducts. J Am Chem Soc 2017; 139:15596-15599. [PMID: 29039920 PMCID: PMC5680540 DOI: 10.1021/jacs.7b09081] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Indexed: 12/20/2022]
Abstract
Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visible and IR pump-probe spectroscopies and TD-DFT calculations. Comparison of the time-resolved IR spectra with DFT computations allowed to unambiguously identify the structure of the intermediate, confirming that light absorption induces a sequential reaction path in which a Z-E photoisomerization of C2-C3 is followed by a rotation around C3-C4 and a subsequent thermal cyclization step. First and second-generation DASAs share a common photoisomerization mechanism in chlorinated solvents with notable differences in kinetics and lifetimes of the excited states. The photogenerated intermediate of the second-generation DASA was photo-accumulated at low temperature and probed with time-resolved spectroscopy, demonstrating the photoreversibility of the isomerization process. Taken together, these results provide a detailed picture of the DASA isomerization pathway on a molecular level.
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Affiliation(s)
- Mariangela Di Donato
- European
Laboratory for Non Linear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- Istituto
Nazionale di Ottica, Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università
di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Michael M. Lerch
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Andrea Lapini
- European
Laboratory for Non Linear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- Dipartimento
di Chimica “Ugo Schiff”, Università
di Firenze, via della
Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Adèle D. Laurent
- CEISAM, UMR CNRS 6230,
BP 92208, 2 Rue de
la Houssinière, 44322 Nantes Cedex 3, France
| | - Alessandro Iagatti
- European
Laboratory for Non Linear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- Istituto
Nazionale di Ottica, Largo Fermi 6, 50125 Firenze, Italy
| | - Laura Bussotti
- European
Laboratory for Non Linear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
| | - Svante P. Ihrig
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
| | - Miroslav Medved’
- Regional
Centre of Advanced Technologies and Materials, Department of Physical
Chemistry, Faculty of Science, Palacký
University in Olomouc, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
- Department
of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, SK-97400 Banská Bystrica, Slovak Republic
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230,
BP 92208, 2 Rue de
la Houssinière, 44322 Nantes Cedex 3, France
- Institut Universitaire de France, 103 bd St Michael, 75005 Paris Cedex 5, France
| | - Wiktor Szymański
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
- Department
of Radiology, University of Groningen, University
Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Wybren Jan Buma
- Van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science
Park 904, 1098XH Amsterdam, The Netherlands
| | - Paolo Foggi
- European
Laboratory for Non Linear Spectroscopy (LENS), via N. Carrara 1, 50019 Sesto Fiorentino, Italy
- Istituto
Nazionale di Ottica, Largo Fermi 6, 50125 Firenze, Italy
- Dipartimento
di Chimica, Università di Perugia, via Elce di Sotto 8, 06100 Perugia, Italy
| | - Ben L. Feringa
- Centre
for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747
AG Groningen, The Netherlands
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15
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García-Iriepa C, Marazzi M. Level of Theory and Solvent Effects on DASA Absorption Properties Prediction: Comparing TD-DFT, CASPT2 and NEVPT2. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E1025. [PMID: 28869516 PMCID: PMC5615680 DOI: 10.3390/ma10091025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 08/26/2017] [Accepted: 09/01/2017] [Indexed: 12/11/2022]
Abstract
Donor-acceptor Stenhouse adducts (DASAs) are a very recent class of organic photoswitches that combine excellent properties, such as color and polarity change, a large structural modification, and excellent fatigue resistance. Despite their potential applications in different fields, very few studies have focused on rationalizing their electronic structure properties. Here, by means of different state-of-the-art theoretical methods, including solvent and vibrational effects, we show that while time dependent-density functional theory (TD-DFT) can qualitatively describe DASAs' excited states, multiconfigurational quantum chemistry methods along with dynamic electron correlation (CASPT2, NEVPT2) are required for a quantitative agreement with the experiment. This finding is reasoned based on the different charge transfer characteristics observed. Moreover, the TD-DFT computed two-photon absorption properties are reported and suggested to red-shift the absorption band, as required for biological applications.
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Affiliation(s)
- Cristina García-Iriepa
- Laboratoire Modélisation et Simulation Multi Echelle, Université Paris-Est, MSME, UMR 8208 CNRS, UPEM, 5 bd Descartes, 77454 Marne-la-Vallée, France.
| | - Marco Marazzi
- Théorie-Modélisation-Simulation, Université de Lorraine-Nancy, SRSMC Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France.
- Théorie-Modélisation-Simulation, CNRS, SRSMC Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France.
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16
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Wang L, Jiang X, Zhang M, Yang M, Liu YN. In Situ Assembly of Au Nanoclusters within Protein Hydrogel Networks. Chem Asian J 2017; 12:2374-2378. [PMID: 28758713 DOI: 10.1002/asia.201700915] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/26/2017] [Indexed: 11/08/2022]
Abstract
We report a new approach of in situ assembling gold nanoclusters (AuNCs) into hydrogel networks by exploiting the triple roles of protein as a gelator, a reducing agent as well as a template. The strategy simply involves the mixing of BSA and AuCl4- under alkaline condition. The obtained AuNCs-protein nanocomposite hydrogels with injectable and moldable features can be made into semi-transparent films or N-doped C/Au composites. Our work demonstrates the feasibility of fabricating AuNCs in situ embedded in hybrid hydrogels, which can serve as multifunctional precursors for constructing diverse nanocomposite materials.
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Affiliation(s)
- Liqiang Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China.,State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China
| | - Xingxing Jiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Min Zhang
- School of Material Science and Energy Engineering, Foshan University, Foshan, Guangdong, 528000, China
| | - Minghui Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China
| | - You-Nian Liu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, China.,State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China
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