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Razi SS, Marin-Luna M, Alajarin M, Martinez-Cuezva A, Berna J. Conjugated bis(enaminones) as effective templates for rotaxane assembly and their post-synthetic modifications. Commun Chem 2024; 7:170. [PMID: 39098851 PMCID: PMC11298525 DOI: 10.1038/s42004-024-01258-4] [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: 06/25/2024] [Accepted: 07/26/2024] [Indexed: 08/06/2024] Open
Abstract
The development of efficient methods for the synthesis of mechanically interlocked compounds is currently considered a major challenge in supramolecular chemistry. Twofold vinylogous fumaramides, a class of conjugated bis(enaminones), successfully achieve the assembly of hydrogen-bonded amide-based rotaxanes, with a templating ability comparable to that of their parent fumaramide-based systems, showcasing full conversions and impressive yields up to 92%. Computational calculations offer a compelling explanation for the remarkable efficiency of these bis(enaminones) in driving the synthesis of unprecedented rotaxanes. The reactivity of these interlocked species was thoroughly investigated, revealing that a one-step double stopper-exchange process can be successfully performed while preserving the mechanical bond. This approach facilitates the formation of controllable rotaxanes, including a three-station molecular shuttle, whose assembly via a clipping methodology is highly unselective. The internal translational motion of this latter species has been successfully controlled in a reversible way by means of a cycloaddition/retrocycloaddition sequence.
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Affiliation(s)
- Syed S Razi
- Departamento de Química Orgánica, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, E-30100, Murcia, Spain
| | - Marta Marin-Luna
- Departamento de Química Orgánica, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, E-30100, Murcia, Spain
| | - Mateo Alajarin
- Departamento de Química Orgánica, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, E-30100, Murcia, Spain
| | - Alberto Martinez-Cuezva
- Departamento de Química Orgánica, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, E-30100, Murcia, Spain.
| | - Jose Berna
- Departamento de Química Orgánica, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, E-30100, Murcia, Spain.
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2
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Valentini M, Ercolani G, Di Stefano S. Kinetic Trapping of an Out-of-Equilibrium Dynamic Library of Imines by Changing Solvent. Chemistry 2024; 30:e202401104. [PMID: 38584126 DOI: 10.1002/chem.202401104] [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: 03/19/2024] [Revised: 04/04/2024] [Accepted: 04/07/2024] [Indexed: 04/09/2024]
Abstract
A well-behaved dynamic library composed of two imines and corresponding amines was subjected to the action of an activated carboxylic acid (ACA), whose decarboxylation is known to be base promoted, in different solvents, namely CD2Cl2, CD3CN, and mixtures of them. Two non-equilibrium systems are consequently obtained: i) a dissipative (CD2Cl2) and ii) an out-of-equilibrium (CD3CN) dynamic library whose composition goes back to equilibrium after a given time. In the former case, the library is fully coupled with the decarboxylation of the ACA, while in the latter, an energy ratchet operates. In the mixed solvents, the library exhibits a mediated behavior. Interestingly, in the presence of an excess of added ACA, the different behavior of the imine library in the two solvents is expected to manifest only when the excess acid is consumed.
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Affiliation(s)
- Matteo Valentini
- Department of Chemistry, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma -, Meccanismi di Reazione, P.le A. Moro 5, I-00185, Roma, Italy
| | - Gianfranco Ercolani
- Department of Chemical Science and Technology, Università di Roma Tor Vergata, Via della Ricerca Scientifica, I-00133, Roma, Italy
| | - Stefano Di Stefano
- Department of Chemistry, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma -, Meccanismi di Reazione, P.le A. Moro 5, I-00185, Roma, Italy
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3
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Ghosh S, Sen S, Jash M, Ghosh S, Jana A, Roy R, Mukherjee N, Mukherjee D, Sarkar J, Ghosh S. Synergistic Augmentation of Beta-Lactams: Exploring Quinoline-Derived Amphipathic Small Molecules as Antimicrobial Potentiators against Methicillin-Resistant Staphylococcus aureus. ACS Infect Dis 2024; 10:1267-1285. [PMID: 38442370 DOI: 10.1021/acsinfecdis.3c00696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The escalation of bacterial resistance against existing therapeutic antimicrobials has reached a critical peak, leading to the rapid emergence of multidrug-resistant strains. Stringent pathways in novel drug discovery hinder our progress in this survival race. A promising approach to combat emerging antibiotic resistance involves enhancing conventional ineffective antimicrobials using low-toxicity small molecule adjuvants. Recent research interest lies in weak membrane-perturbing agents with unique cyclic hydrophobic components, addressing a significant gap in antimicrobial drug exploration. Our study demonstrates that quinoline-based amphipathic small molecules, SG-B-52 and SG-B-22, significantly reduce MICs of selected beta-lactam antibiotics (ampicillin and amoxicillin) against lethal methicillin-resistant Staphylococcus aureus (MRSA). Mechanistically, membrane perturbation, depolarization, and ROS generation drive cellular lysis and death. These molecules display minimal in vitro and in vivo toxicity, showcased through hemolysis assays, cell cytotoxicity analysis, and studies on albino Wistar rats. SG-B-52 exhibits impressive biofilm-clearing abilities against MRSA biofilms, proposing a strategy to enhance beta-lactam antibiosis and encouraging the development of potent antimicrobial potentiators.
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Affiliation(s)
- Surojit Ghosh
- Smart Healthcare Department, Interdisciplinary Research Platform, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Samya Sen
- iHUB Drishti Foundation, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Moumita Jash
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Satyajit Ghosh
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Aniket Jana
- Smart Healthcare Department, Interdisciplinary Research Platform, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Rajsekhar Roy
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Nabanita Mukherjee
- Smart Healthcare Department, Interdisciplinary Research Platform, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Dipro Mukherjee
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
| | - Jayita Sarkar
- Centre for Research and Development of Scientific Instruments (CRDSI), Indian Institute of Technology, Jodhpur, Rajasthan, 342030, India
| | - Surajit Ghosh
- Department of Bioscience and Bioengineering, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
- Smart Healthcare Department, Interdisciplinary Research Platform, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
- iHUB Drishti Foundation, Indian Institute of Technology, Jodhpur, Rajasthan 342030, India
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4
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Wu Z, Xiao L, Xu R, Zhong S, Gong M, Wang G. UV-Light-Induced Morphological Transformation of Spiropyran Assemblies from Irregular Sheet-like Structures to Nanospheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:13946-13952. [PMID: 37736671 DOI: 10.1021/acs.langmuir.3c01535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Studies on self-assembling systems with a controllable morphology responding to light stimulation are significant for revealing the process and mechanism of assembly. Here, a molecule of spiropyran derivative (SP) possessing photoresponsive assembly morphology is constructed. SP self-assembles into irregular sheet-like structures whose morphology can be significantly transformed into regular nanospheres under continuous ultraviolet light stimulation. The UV-vis absorption spectra indicate that 56% of SP are isomerized from closed-ring form (SPC) to open-ring form (SPO) with color changes from colorless to magenta. Furthermore, theoretical calculations demonstrate that SPO-SPO aggregates possess stronger van der Waals forces than do SPC-SPC aggregates and tend to form stable intermediates combined with SPO isomers. Therefore, the isomerization of SP from SPC to SPO and the differences in intermolecular interactions are important factors in the morphological transition. Our study provides an efficient strategy to modulate the assembled morphology, which holds great promise to be applied in the field of smart materials.
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Affiliation(s)
- Zhen Wu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Leping Xiao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ruoyu Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Shijie Zhong
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Min Gong
- School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guojie Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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5
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Luo Z, Zhang X, Zhao J, Bai R, Wang C, Wang Y, Zhao D, Yan X. Mechanically Interlocked [2]Rotaxane Aerogels with Tunable Morphologies and Mechanical Properties. Angew Chem Int Ed Engl 2023; 62:e202306489. [PMID: 37506278 DOI: 10.1002/anie.202306489] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/18/2023] [Accepted: 07/28/2023] [Indexed: 07/30/2023]
Abstract
Mechanical bonds have been utilized as promising motifs to construct mechanically interlocked aerogels (MIAs) with mechanical adaptivity and multifunctionality. However, fabricating such aerogels with not only precise chemical structures but also dynamic features remains challenging. Herein, we present MIAs carrying dense [2]rotaxane units, which bestow both the stability and flexibility of the aerogel network. Owing to the stable chemical structure of a [2]rotaxane, MIAs possessing a precise and full-scale mechanically interlocked network could be fabricated with the aid of diverse solvents. In addition, the dynamic nature of the [2]rotaxane resulted in morphologies and mechanical performances of the MIAs that can be dramatically modulated under chemical stimuli. We hope that the structure-property relationship in MIAs will facilitate the development of mechanically interlocked materials and provide novel opportunities toward constructing smart materials with multifunctionalities.
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Affiliation(s)
- Zhen Luo
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Xinhai Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Jun Zhao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Ruixue Bai
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Chunyu Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Yuanhao Wang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Dong Zhao
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Xuzhou Yan
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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6
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Leanza L, Perego C, Pesce L, Salvalaglio M, von Delius M, Pavan GM. Into the dynamics of rotaxanes at atomistic resolution. Chem Sci 2023; 14:6716-6729. [PMID: 37350834 PMCID: PMC10283497 DOI: 10.1039/d3sc01593a] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 05/04/2023] [Indexed: 06/24/2023] Open
Abstract
Mechanically-interlocked molecules (MIMs) are at the basis of artificial molecular machines and are attracting increasing interest for various applications, from catalysis to drug delivery and nanoelectronics. MIMs are composed of mechanically-interconnected molecular sub-parts that can move with respect to each other, imparting these systems innately dynamical behaviors and interesting stimuli-responsive properties. The rational design of MIMs with desired functionalities requires studying their dynamics at sub-molecular resolution and on relevant timescales, which is challenging experimentally and computationally. Here, we combine molecular dynamics and metadynamics simulations to reconstruct the thermodynamics and kinetics of different types of MIMs at atomistic resolution under different conditions. As representative case studies, we use rotaxanes and molecular shuttles substantially differing in structure, architecture, and dynamical behavior. Our computational approach provides results in agreement with the available experimental evidence and a direct demonstration of the critical effect of the solvent on the dynamics of the MIMs. At the same time, our simulations unveil key factors controlling the dynamics of these systems, providing submolecular-level insights into the mechanisms and kinetics of shuttling. Reconstruction of the free-energy profiles from the simulations reveals details of the conformations of macrocycles on the binding site that are difficult to access via routine experiments and precious for understanding the MIMs' behavior, while their decomposition in enthalpic and entropic contributions unveils the mechanisms and key transitions ruling the intermolecular movements between metastable states within them. The computational framework presented herein is flexible and can be used, in principle, to study a variety of mechanically-interlocked systems.
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Affiliation(s)
- Luigi Leanza
- Department of Applied Science and Technology, Politecnico di Torino Corso Duca degli Abruzzi, 24 10129 Torino Italy
| | - Claudio Perego
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano Campus Est, Via la Santa 1 6962 Lugano-Viganello Switzerland
| | - Luca Pesce
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano Campus Est, Via la Santa 1 6962 Lugano-Viganello Switzerland
| | - Matteo Salvalaglio
- Department of Chemical Engineering, University College London London WC1E 7JE UK
| | - Max von Delius
- Institute of Organic Chemistry, Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Giovanni M Pavan
- Department of Applied Science and Technology, Politecnico di Torino Corso Duca degli Abruzzi, 24 10129 Torino Italy
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano Campus Est, Via la Santa 1 6962 Lugano-Viganello Switzerland
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7
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Del Giudice D, Valentini M, Sappino C, Spatola E, Murru A, Ercolani G, Di Stefano S. Controlling the Conformation of 2-Dimethylaminobiphenyls by Transient Intramolecular Hydrogen Bonding. J Org Chem 2023; 88:4379-4386. [PMID: 36926894 DOI: 10.1021/acs.joc.2c02992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Temporal control of molecular motions is receiving increasing attention because it is central to the development of molecular switches and motors and nanoscopic materials with life-like properties. Inspired by previous studies, here, we report that acid 12 can be used to temporally control the conformational freedom around the C-C bond connecting the two aromatic rings of the ditopic bases 4 and 5. Consistent with NMR measurements and DFT calculations, before fuel addition, the conformational motion of the two aromatic rings of both 4 and 5 mainly consists of a large amplitude torsional oscillation spanning about 260° and passing for the anti conformation (the two nitrogen atoms at opposite sides). Immediately after the addition of 12, due to the protonation of one nitrogen and consequent formation of an N-H···N intramolecular hydrogen bond, the torsional oscillation in both 4H+ and 5H+ is not only restricted to a smaller range (about 100°) but explores the previously forbidden conformational space around the syn conformation (the two nitrogen atoms at the same side). However, the new state is an out-of-equilibrium state since decarboxylation of the conjugate base of 12 takes place and, at the end of the process, the system reverts to the more conformationally mobile state.
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Affiliation(s)
- Daniele Del Giudice
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
| | - Matteo Valentini
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
| | - Carla Sappino
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
| | - Emanuele Spatola
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
| | - Aurora Murru
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
| | - Gianfranco Ercolani
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 00133 Roma, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica, Università di Roma La Sapienza and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, P.le A. Moro 5, I-00185 Roma, Italy
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8
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Del Giudice D, Di Stefano S. Dissipative Systems Driven by the Decarboxylation of Activated Carboxylic Acids. Acc Chem Res 2023; 56:889-899. [PMID: 36916734 PMCID: PMC10077594 DOI: 10.1021/acs.accounts.3c00047] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
ConspectusThe achievement of artificial systems capable of being maintained in out-of-equilibrium states featuring functional properties is a main goal of current chemical research. Absorption of electromagnetic radiation or consumption of a chemical species (a "chemical fuel") are the two strategies typically employed to reach such out-of-equilibrium states, which have to persist as long as one of the above stimuli is present. For this reason such systems are often referred to as "dissipative systems". In the simplest scheme, the dissipative system is initially found in a resting, equilibrium state. The addition of a chemical fuel causes the system to shift to an out-of-equilibrium state. When the fuel is exhausted, the system reverts to the initial, equilibrium state. Thus, from a mechanistic standpoint, the dissipative system turns out to be a catalyst for the fuel consumption. It has to be noted that, although very simple, this scheme implies the chance to temporally control the dissipative system. In principle, modulating the nature and/or the amount of the chemical fuel added, one can have full control of the time spent by the system in the out-of-equilibrium state.In 2016, we found that 2-cyano-2-phenylpropanoic acid (1a), whose decarboxylation proceeds smoothly under mild basic conditions, could be used as a chemical fuel to drive the back and forth motion of a catenane-based molecular switch. The acid donates a proton to the catenane that passes from the neutral state A to the transient protonated state B. Decarboxylation of the resulting carboxylate (1acb), generates a carbanion, which, being a strong base, retakes the proton from the protonated catenane that, consequently, returns to the initial state A. The larger the amount of the added fuel, the longer the time spent by the catenane in the transient, out-of-equilibrium state. Since then, acid 1a and other activated carboxylic acids (ACAs) have been used to drive the operation of a large number of dissipative systems based on the acid-base reaction, from molecular machines to host-guest systems, from catalysts to smart materials, and so on. This Account illustrates such systems with the purpose to show the wide applicability of ACAs as chemical fuels. This generality is due to the simplicity of the idea underlying the operation principle of ACAs, which always translates into simple experimental requirements.
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Affiliation(s)
- Daniele Del Giudice
- Dipartimento di Chimica and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, 00185 Rome, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica and ISB-CNR Sede Secondaria di Roma - Meccanismi di Reazione, Università degli Studi di Roma "La Sapienza", P.le A. Moro 5, 00185 Rome, Italy
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9
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Sakata Y, Nakamura R, Hibi T, Akine S. Speed Tuning of the Formation/Dissociation of a Metallorotaxane. Angew Chem Int Ed Engl 2023; 62:e202217048. [PMID: 36628483 DOI: 10.1002/anie.202217048] [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: 11/19/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 01/12/2023]
Abstract
Switching between the formation/dissociation of rotaxanes is important to control the function of various types of rotaxane-based materials. We have developed a convenient and simple strategy, the so-called "accelerator addition", to make a static rotaxane dynamic without apparently affecting the chemical structure. As an interlocked molecule that enables tuning of the formation/dissociation speed, a metallorotaxane was quantitatively generated by the complexation of a triptycene-based dumbbell-shaped mononuclear complex, [PdL2 ]2+ (L=2,3-diaminotriptycene), with 27C9. As a result of the inertness of the Pd2+ -based coordination structure, the metallorotaxane was slowly formed (the static state). This rotaxane formation was accelerated 27 times simply by adding Br- as an accelerator (the dynamic state). A similar drastic acceleration was also demonstrated during the dissociation process when Cs+ was added to the metallorotaxane to form the free axle [PdL2 ]2+ and the 27C9-Cs+ complex.
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Affiliation(s)
- Yoko Sakata
- Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan.,Nano Life Science Institute (WPI-NanoLSI), Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Ryosuke Nakamura
- Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Toshihiro Hibi
- Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Shigehisa Akine
- Graduate School of Natural Science and Technology, Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan.,Nano Life Science Institute (WPI-NanoLSI), Kanazawa University Kakuma-machi, Kanazawa, 920-1192, Japan
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10
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Ayme JF, Bruchmann B, Karmazin L, Kyritsakas N. Transient self-assembly of metal-organic complexes. Chem Sci 2023; 14:1244-1251. [PMID: 36756320 PMCID: PMC9891378 DOI: 10.1039/d2sc06374c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 01/06/2023] [Indexed: 01/11/2023] Open
Abstract
Implementing transient processes in networks of dynamic molecules holds great promise for developing new functional behaviours. Here we report that trichloroacetic acid can be used to temporarily rearrange networks of dynamic imine-based metal complexes towards new equilibrium states, forcing them to express complexes otherwise unfavourable in their initial equilibrium states. Basic design principles were determined for the creation of such networks. Where a complex distribution of products was obtained in the initial equilibrium state of the system, the transient rearrangement temporarily yielded a simplified output, forcing a more structured distribution of products. Where a single complex was obtained in the initial equilibrium state of the system, the transient rearrangement temporarily modified the properties of this complex. By doing so, the mechanical properties of an helical macrocyclic complex could be temporarily altered by rearranging it into a [2]catenane.
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Affiliation(s)
- Jean-François Ayme
- BASF SE, Joint Research Network on Advanced Materials and Systems (JONAS) Carl-Bosch Str. 38 67056 Ludwigshafen Germany
| | - Bernd Bruchmann
- BASF SE, Joint Research Network on Advanced Materials and Systems (JONAS) Carl-Bosch Str. 38 67056 Ludwigshafen Germany
| | - Lydia Karmazin
- Service de Radiocristallographie, Fédération de chimie Le Bel FR2010, Université de Strasbourg 1 rue Blaise Pascal 67008 Strasbourg France
| | - Nathalie Kyritsakas
- Service de Radiocristallographie, Fédération de chimie Le Bel FR2010, Université de Strasbourg 1 rue Blaise Pascal 67008 Strasbourg France
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11
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Krämer J, Grimm LM, Zhong C, Hirtz M, Biedermann F. A supramolecular cucurbit[8]uril-based rotaxane chemosensor for the optical tryptophan detection in human serum and urine. Nat Commun 2023; 14:518. [PMID: 36720875 PMCID: PMC9889744 DOI: 10.1038/s41467-023-36057-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 01/13/2023] [Indexed: 02/02/2023] Open
Abstract
Sensing small biomolecules in biofluids remains challenging for many optical chemosensors based on supramolecular host-guest interactions due to adverse interplays with salts, proteins, and other biofluid components. Instead of following the established strategy of developing alternative synthetic binders with improved affinities and selectivity, we report a molecular engineering approach that addresses this biofluid challenge. Here we introduce a cucurbit[8]uril-based rotaxane chemosensor feasible for sensing the health-relevant biomarker tryptophan at physiologically relevant concentrations, even in protein- and lipid-containing human blood serum and urine. Moreover, this chemosensor enables emission-based high-throughput screening in a microwell plate format and can be used for label-free enzymatic reaction monitoring and chirality sensing. Printed sensor chips with surface-immobilized rotaxane-microarrays are used for fluorescence microscopy imaging of tryptophan. Our system overcomes the limitations of current supramolecular host-guest chemosensors and will foster future applications of supramolecular sensors for molecular diagnostics.
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Affiliation(s)
- Joana Krämer
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Laura M Grimm
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Chunting Zhong
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Frank Biedermann
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
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12
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Joy F, Nizam A, Nair Y, Pillai R, Devasia J, Nagella P. Templating motifs of molecular axles in hydrogen bonding [2]rotaxanes: Synthesis and applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Shimazaki R, Sadakiyo M. Ethidium tetra-phenyl-borate aceto-nitrile disolvate. IUCRDATA 2022; 7:x220951. [PMID: 36405848 PMCID: PMC9638059 DOI: 10.1107/s2414314622009518] [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: 09/09/2022] [Accepted: 09/26/2022] [Indexed: 11/09/2022] Open
Abstract
In the title solvated salt, (C21H20N3){B(C6H5)4}·2CH3CN (systematic name 3,8-di-amino-5-ethyl-6-phenyl-phenanthridin-5-ium tetra-phenyl-borate aceto-nitrile disolvate), the dihedral angle between the tricyclic fused ring system (r.m.s. deviation = 0.021 Å) and the pendant phenyl group of the ethidium cation is 84.91 (7)°. The {B(C6H5)4}- anion has a typical tetra-hedral structure. The aceto-nitrile solvent mol-ecules do not accept hydrogen bonds from the -NH2 groups of the ethidium ions.
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Affiliation(s)
- Runa Shimazaki
- Department of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Masaaki Sadakiyo
- Department of Applied Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
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14
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Borodin O, Shchukin Y, Schmid J, von Delius M. Anion-assisted amidinium exchange and metathesis. Chem Commun (Camb) 2022; 58:10178-10181. [PMID: 35997205 PMCID: PMC9469691 DOI: 10.1039/d2cc03425e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 07/27/2022] [Indexed: 11/30/2022]
Abstract
Dynamic covalent chemistry has become an invaluable tool for the design and preparation of adaptable yet robust molecular systems. Herein we explore the scope of a largely overlooked dynamic covalent reaction - amidinium exchange - and report on conditions that allow formal amidinium metathesis reactions.
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Affiliation(s)
- Oleg Borodin
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
| | - Yevhenii Shchukin
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
| | - Jonas Schmid
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
| | - Max von Delius
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany.
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15
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Del Giudice D, Valentini M, Melchiorre G, Spatola E, Di Stefano S. Dissipative Dynamic Covalent Chemistry (DDCvC) Based on the Transimination Reaction. Chemistry 2022; 28:e202200685. [DOI: 10.1002/chem.202200685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Daniele Del Giudice
- Dipartimento di Chimica Università degli Studi di Roma “La Sapienza” P.le A. Moro 5 00185 Rome Italy
| | - Matteo Valentini
- Dipartimento di Chimica Università degli Studi di Roma “La Sapienza” P.le A. Moro 5 00185 Rome Italy
| | - Gabriele Melchiorre
- Dipartimento di Chimica Università degli Studi di Roma “La Sapienza” P.le A. Moro 5 00185 Rome Italy
| | - Emanuele Spatola
- Dipartimento di Chimica Università degli Studi di Roma “La Sapienza” P.le A. Moro 5 00185 Rome Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica Università degli Studi di Roma “La Sapienza” P.le A. Moro 5 00185 Rome Italy
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