51
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Woźny M, Tomczyk KM, Więckowska A, Sutuła S, Trzybiński D, Woźniak K, Korybut-Daszkiewicz B. The influence of metal-complexing macrocycle size on intramolecular movement in rotaxanes. Dalton Trans 2019; 48:6546-6557. [PMID: 31011729 DOI: 10.1039/c9dt00083f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
[2]rotaxanes composed of a dibenzo-24-crown-8 wheel (DB24C8) and an axle containing two metal-complexing tetraazamacrocyclic units linked with a p-xylylene bridge, coordinating the same or different metal ions (Ni and/or Cu) are described. A symmetric di-Ni rotaxane crystallizes in the monoclinic P21/c space group with one rotaxane cation and four PF6- counterions in the asymmetric part of the unit cell. In the crystal, the cations and anions of the investigated compound form an intertwined 3D-framework with C-HF and C-Hπ intermolecular interactions. The NMR ROESY spectrum of the diamagnetic di-Ni rotaxane confirms that at room temperature slow shuttling of the DB24C8 moiety takes place along the symmetric axle. The non-symmetric rotaxane, containing 14- and 16-membered nickel(ii)-complexing macrocycles, exists in solution as an equilibrium mixture of two conformers in the ratio of ca. 1 : 7. This rotaxane behaves as a potential-controlled molecular switch: in the major isomer, the DB24C8 moiety is localized in the vicinity of the 14-membered metal-complexing macrocycle, and moves towards the 16-membered unit upon the first oxidation. Reverse translocation occurs after the subsequent oxidation of the 14-membered complex unit. In contrast, no such movements of the DB24C8 moiety were observed upon investigation of the heteronuclear [2]rotaxane, coordinating copper(ii) and nickel(ii) ions.
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Affiliation(s)
- Mateusz Woźny
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland.
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52
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Škugor M, Valero J, Murayama K, Centola M, Asanuma H, Famulok M. Orthogonally Photocontrolled Non‐Autonomous DNA Walker. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901272] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Marko Škugor
- LIMES Chemical Biology UnitUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Julián Valero
- LIMES Chemical Biology UnitUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Germany
- Max-Planck-Fellow Chemische BiologieCenter of Advanced European Studies and Research (caesar) Ludwig-Erhard-Allee 2 53175 Bonn Germany
| | - Keiji Murayama
- Department of Biomolecular EngineeringGraduate School of EngineeringNagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Mathias Centola
- LIMES Chemical Biology UnitUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Hiroyuki Asanuma
- Department of Biomolecular EngineeringGraduate School of EngineeringNagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
| | - Michael Famulok
- LIMES Chemical Biology UnitUniversität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Germany
- Max-Planck-Fellow Chemische BiologieCenter of Advanced European Studies and Research (caesar) Ludwig-Erhard-Allee 2 53175 Bonn Germany
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53
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Salzillo T, Brillante A. Commenting on the photoreactions of anthracene derivatives in the solid state. CrystEngComm 2019. [DOI: 10.1039/c9ce00176j] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The photochemical reactions of anthracene derivatives have been reviewed by means of a micro-Raman technique, monitoring at the same time and on the very same spot, the molecular (intramolecular vibrations) and the lattice (intermolecular vibrations) transformations.
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Affiliation(s)
- Tommaso Salzillo
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna and INSTM-UdR Bologna
- 40136 Bologna
- Italy
- Department of Molecular Nanoscience and Organic Materials
| | - Aldo Brillante
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna and INSTM-UdR Bologna
- 40136 Bologna
- Italy
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54
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Yan T, Zhu L, Ju H, Lei J. DNA-Walker-Induced Allosteric Switch for Tandem Signal Amplification with Palladium Nanoparticles/Metal-Organic Framework Tags in Electrochemical Biosensing. Anal Chem 2018; 90:14493-14499. [PMID: 30472833 DOI: 10.1021/acs.analchem.8b04338] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A DNA walker as a new molecular machine can walk on defined tracks to directly generate signal indicators in biosensing and biomedical applications. In this work, a tandem signal amplification strategy was developed on the basis of the DNA-walker-induced conformation switch for bridging palladium nanoparticles/metal-organic framework tags in ultrasensitive electrochemical DNA biosensing. The signal tags were synthesized by in situ reduction of Pd nanocrystals on porphyrinic metal-organic frameworks (PCN-224), followed by conjugation with streptavidin (SA). The as-prepared Pd/PCN-224-SA tag could electrocatalyze the oxidation of NaBH4 with high efficiency for signal readout. The presence of target DNA released swing arms that were each silenced by a blocker, and then the activated swing arms could hybridize with hairpin DNA. The movement of swing arms was powered by enzymatic cleavage of conjugated oligonucleotides, inducing the allosteric switch from hairpin to SA aptamer. Therefore, Pd/PCN-224-SA tags were brought onto the electrode surface via SA-aptamer biorecognition to generate the enhanced electrochemical signal. The DNA walker-based electrochemical biosensor demonstrated good performance such as 6 orders of magnitude linear range, femtomolar detection limit, and single mismatch differentiation ability. Moreover, the feasibility of the biosensor was identified in serum matrixes. The tandem signal amplification of metal-organic frameworks and DNA walkers provided a new avenue in trace electrochemical biosensing.
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Affiliation(s)
- Tingting Yan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Longyi Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Jianping Lei
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
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55
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Dynamic Functional Molecular Systems: From Supramolecular Structures to Multi‐Component Machinery and to Molecular Cybernetics. Isr J Chem 2018. [DOI: 10.1002/ijch.201800124] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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56
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Zhou L, Marras AE, Huang CM, Castro CE, Su HJ. Paper Origami-Inspired Design and Actuation of DNA Nanomachines with Complex Motions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802580. [PMID: 30369060 DOI: 10.1002/smll.201802580] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/19/2018] [Indexed: 05/26/2023]
Abstract
Significant progress in DNA nanotechnology has accelerated the development of molecular machines with functions like macroscale machines. However, the mobility of DNA self-assembled nanorobots is still dramatically limited due to challenges with designing and controlling nanoscale systems with many degrees of freedom. Here, an origami-inspired method to design transformable DNA nanomachines is presented. This approach integrates stiff panels formed by bundles of double-stranded DNA connected with foldable creases formed by single-stranded DNA. To demonstrate the method, a DNA version of the paper origami mechanism called a waterbomb base (WBB) consisting of six panels connected by six joints is constructed. This nanoscale WBB can follow four distinct motion paths to transform between five distinct configurations including a flat square, two triangles, a rectangle, and a fully compacted trapezoidal shape. To achieve this, the sequence specificity of DNA base-pairing is leveraged for the selective actuation of joints and the ion-sensitivity of base-stacking interactions is employed for the flattening of joints. In addition, higher-order assembly of DNA WBBs into reconfigurable arrays is achieved. This work establishes a foundation for origami-inspired design for next generation synthetic molecular robots and reconfigurable nanomaterials enabling more complex and controllable motion.
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Affiliation(s)
- Lifeng Zhou
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA
| | - Alexander E Marras
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA
| | - Chao-Min Huang
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA
| | - Carlos E Castro
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA
- Biophysics Graduate Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Hai-Jun Su
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA
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57
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Mason SD, Tang Y, Li Y, Xie X, Li F. Emerging bioanalytical applications of DNA walkers. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.08.015] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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58
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Zhang Z, Shao L, Yang J. A phosphonated copillar[5]arene: Synthesis and application in the construction of pH-responsive supramolecular polymer in water. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.06.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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59
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Kovaříček P, Cebecauer M, Neburková J, Bartoň J, Fridrichová M, Drogowska KA, Cigler P, Lehn JM, Kalbac M. Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds. ACS NANO 2018; 12:7141-7147. [PMID: 29889492 DOI: 10.1021/acsnano.8b03015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Manipulating nanoscopic objects by external stimuli is the cornerstone of nanoscience. Here, we report the implementation of dynamic covalent chemistry in the reversible binding and directional motion of fluorescent nanodiamond particles at a functionalized graphene surface via imine linkages. The dynamic connections allow for controlling the formation and rupture of these linkages by external stimuli. By introduction of pH gradients, the nanoparticles are driven to move along the gradient due to the different rates of the imine condensation and hydrolysis in the two environments. The multivalent nature of the particle-to-surface connection ensures that particles remain attached to the surface, whereas its dynamic character allows for exchange reaction, thus leading to displacement yet bound behavior in two-dimensional space. These results open a pathway for thermodynamically controlled manipulation of objects on the nanoscale.
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Affiliation(s)
- Petr Kovaříček
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences , Dolejškova 2155/3 , 182 23 Prague , Czech Republic
| | - Marek Cebecauer
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences , Dolejškova 2155/3 , 182 23 Prague , Czech Republic
| | - Jitka Neburková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo náměstí 2 , 166 10 Prague , Czech Republic
- First Faculty of Medicine , Charles University , Kateřinská 32 , 121 08 Prague , Czech Republic
| | - Jan Bartoň
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo náměstí 2 , 166 10 Prague , Czech Republic
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague 2, Czech Republic
| | - Michaela Fridrichová
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences , Dolejškova 2155/3 , 182 23 Prague , Czech Republic
| | - Karolina A Drogowska
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences , Dolejškova 2155/3 , 182 23 Prague , Czech Republic
| | - Petr Cigler
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo náměstí 2 , 166 10 Prague , Czech Republic
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires , Université de Strasbourg , 8 allée Gaspard Monge , 670 00 Strasbourg , France
| | - Martin Kalbac
- J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences , Dolejškova 2155/3 , 182 23 Prague , Czech Republic
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60
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Valero J, Pal N, Dhakal S, Walter NG, Famulok M. A bio-hybrid DNA rotor-stator nanoengine that moves along predefined tracks. NATURE NANOTECHNOLOGY 2018; 13:496-503. [PMID: 29632399 PMCID: PMC5994166 DOI: 10.1038/s41565-018-0109-z] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 03/01/2018] [Indexed: 05/25/2023]
Abstract
Biological motors are highly complex protein assemblies that generate linear or rotary motion, powered by chemical energy. Synthetic motors based on DNA nanostructures, bio-hybrid designs or synthetic organic chemistry have been assembled. However, unidirectionally rotating biomimetic wheel motors with rotor-stator units that consume chemical energy are elusive. Here, we report a bio-hybrid nanoengine consisting of a catalytic stator that unidirectionally rotates an interlocked DNA wheel, powered by NTP hydrolysis. The engine consists of an engineered T7 RNA polymerase (T7RNAP-ZIF) attached to a dsDNA nanoring that is catenated to a rigid rotating dsDNA wheel. The wheel motor produces long, repetitive RNA transcripts that remain attached to the engine and are used to guide its movement along predefined ssDNA tracks arranged on a DNA nanotube. The simplicity of the design renders this walking nanoengine adaptable to other biological nanoarchitectures, facilitating the construction of complex bio-hybrid structures that achieve NTP-driven locomotion.
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Affiliation(s)
- Julián Valero
- LIMES Program Unit Chemical Biology & Medicinal Chemistry, c/o Kekulé Institut für Organische Chemie und Biochemie, University of Bonn, Bonn, Germany
- Center of Advanced European Studies and Research (CAESAR), Bonn, Germany
| | - Nibedita Pal
- Single Molecule Analysis Group, Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Soma Dhakal
- Single Molecule Analysis Group, Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA, USA
| | - Nils G Walter
- Single Molecule Analysis Group, Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
| | - Michael Famulok
- LIMES Program Unit Chemical Biology & Medicinal Chemistry, c/o Kekulé Institut für Organische Chemie und Biochemie, University of Bonn, Bonn, Germany.
- Center of Advanced European Studies and Research (CAESAR), Bonn, Germany.
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61
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Adelizzi B, Aloi A, Van Zee NJ, Palmans ARA, Meijer EW, Voets IK. Painting Supramolecular Polymers in Organic Solvents by Super-resolution Microscopy. ACS NANO 2018; 12:4431-4439. [PMID: 29697958 PMCID: PMC5968428 DOI: 10.1021/acsnano.8b00396] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/26/2018] [Indexed: 05/29/2023]
Abstract
Despite the rapid development of complex functional supramolecular systems, visualization of these architectures under native conditions at high resolution has remained a challenging endeavor. Super-resolution microscopy was recently proposed as an effective tool to unveil one-dimensional nanoscale structures in aqueous media upon chemical functionalization with suitable fluorescent probes. Building upon our previous work, which enabled photoactivation localization microscopy in organic solvents, herein, we present the imaging of one-dimensional supramolecular polymers in their native environment by interface point accumulation for imaging in nanoscale topography (iPAINT). The noncovalent staining, typical of iPAINT, allows the investigation of supramolecular polymers' structure in situ without any chemical modification. The quasi-permanent adsorption of the dye to the polymer is exploited to identify block-like arrangements within supramolecular fibers, which were obtained upon mixing homopolymers that were prestained with different colors. The staining of the blocks, maintained by the lack of exchange of the dyes, permits the imaging of complex structures for multiple days. This study showcases the potential of PAINT-like strategies such as iPAINT to visualize multicomponent dynamic systems in their native environment with an easy, synthesis-free approach and high spatial resolution.
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Affiliation(s)
- Beatrice Adelizzi
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Antonio Aloi
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Nathan J. Van Zee
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Anja R. A. Palmans
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - E. W. Meijer
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ilja K. Voets
- Institute
for Complex Molecular Systems, Laboratory of Macromolecular and
Organic Chemistry, Department of Chemical Engineering and Chemistry, Laboratory of Self-Organizing
Soft Matter, Department of Chemical Engineering and Chemistry, and Laboratory of
Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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62
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Ren Y, Svensson PH, Ramström O. A Multicontrolled Enamine Configurational Switch Undergoing Dynamic Constitutional Exchange. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yansong Ren
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
| | - Per H. Svensson
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
- Research Institutes of Sweden RISE Bioscience and Materials Forskargatan 18 15136 Södertälje Sweden
| | - Olof Ramström
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
- Department of Chemistry University of Massachusetts Lowell 1 University Avenue Lowell MA 01854 USA
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63
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Ren Y, Svensson PH, Ramström O. A Multicontrolled Enamine Configurational Switch Undergoing Dynamic Constitutional Exchange. Angew Chem Int Ed Engl 2018; 57:6256-6260. [DOI: 10.1002/anie.201802994] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Yansong Ren
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
| | - Per H. Svensson
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
- Research Institutes of Sweden RISE Bioscience and Materials Forskargatan 18 15136 Södertälje Sweden
| | - Olof Ramström
- Department of Chemistry KTH—Royal Institute of Technology Teknikringen 36 10044 Stockholm Sweden
- Department of Chemistry University of Massachusetts Lowell 1 University Avenue Lowell MA 01854 USA
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64
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Urban MJ, Both S, Zhou C, Kuzyk A, Lindfors K, Weiss T, Liu N. Gold nanocrystal-mediated sliding of doublet DNA origami filaments. Nat Commun 2018; 9:1454. [PMID: 29654323 PMCID: PMC5899135 DOI: 10.1038/s41467-018-03882-w] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 03/15/2018] [Indexed: 12/21/2022] Open
Abstract
Sliding is one of the fundamental mechanical movements in machinery. In macroscopic systems, double-rack pinion machines employ gears to slide two linear tracks along opposite directions. In microscopic systems, kinesin-5 proteins crosslink and slide apart antiparallel microtubules, promoting spindle bipolarity and elongation during mitosis. Here we demonstrate an artificial nanoscopic analog, in which gold nanocrystals can mediate coordinated sliding of two antiparallel DNA origami filaments powered by DNA fuels. Stepwise and reversible sliding along opposite directions is in situ monitored and confirmed using fluorescence spectroscopy. A theoretical model including different energy transfer mechanisms is developed to understand the observed fluorescence dynamics. We further show that such sliding can also take place in the presence of multiple DNA sidelocks that are introduced to inhibit the relative movements. Our work enriches the toolbox of DNA-based nanomachinery, taking one step further toward the vision of molecular nanofactories. Kinesin, a motor protein, moves along filaments in a walk-like fashion to transport cargo to specific places in the cell. Here, the authors developed an analogous, artificial system consisting of nanoparticles moving along DNA filaments.
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Affiliation(s)
- Maximilian J Urban
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, D-70569, Stuttgart, Germany.,Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, D-69120, Heidelberg, Germany
| | - Steffen Both
- 4th Physics Institute and Stuttgart Research Center of Photonic Engineering, University of Stuttgart, 70569, Stuttgart, Germany
| | - Chao Zhou
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, D-70569, Stuttgart, Germany. .,Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, D-69120, Heidelberg, Germany.
| | - Anton Kuzyk
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, D-70569, Stuttgart, Germany.,Department of Neuroscience and Biomedical Engineering, Aalto University, School of Science, P.O. Box 12200, FI-00076, Aalto, Finland
| | - Klas Lindfors
- Department of Chemistry, University of Cologne, Luxemburger Strasse 116, 50939, Köln, Germany
| | - Thomas Weiss
- 4th Physics Institute and Stuttgart Research Center of Photonic Engineering, University of Stuttgart, 70569, Stuttgart, Germany
| | - Na Liu
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, D-70569, Stuttgart, Germany. .,Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, D-69120, Heidelberg, Germany.
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65
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Liu JL, Tang ZL, Zhang JQ, Chai YQ, Zhuo Y, Yuan R. Morphology-Controlled 9,10-Diphenylanthracene Nanoblocks as Electrochemiluminescence Emitters for MicroRNA Detection with One-Step DNA Walker Amplification. Anal Chem 2018; 90:5298-5305. [DOI: 10.1021/acs.analchem.8b00209] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jia-Li Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
| | - Zhi-Ling Tang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
| | - Jia-Qi Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
| | - Ya-Qin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
| | - Ying Zhuo
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715,China
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66
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Zeng X, Deng H, Jia X, Cui L, Li J, Li C, Fang J. Construction of [2]rotaxane-based supramolecular polymers driven by wheel-stopper π⋯π interactions. Chem Commun (Camb) 2018; 54:11634-11637. [DOI: 10.1039/c8cc07188h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new strategy for supramolecular polymerization is designed and presented, which is based on the wheel-stopper charge-transfer interactions of [2]rotaxanes.
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Affiliation(s)
- Xianqiang Zeng
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Hongmei Deng
- Laboratory for Microstructures, Instrumental Analysis and Research Center of Shanghai University
- Shanghai 200444
- P. R. China
| | - Xueshun Jia
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Lei Cui
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jian Li
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Chunju Li
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jianhui Fang
- Department of Chemistry
- Center for Supramolecular Chemistry and Catalysis
- Shanghai University
- Shanghai 200444
- P. R. China
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67
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Findlay JA, Crowley JD. Functional nanomachines: Recent advances in synthetic molecular machinery. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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68
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69
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Mittal N, Özer MS, Schmittel M. Four-Component Catalytic Machinery: Reversible Three-State Control of Organocatalysis by Walking Back and Forth on a Track. Inorg Chem 2017; 57:3579-3586. [DOI: 10.1021/acs.inorgchem.7b02703] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Nikita Mittal
- Center of Micro and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strasse 2, D-57068 Siegen, Germany
| | - Merve S. Özer
- Center of Micro and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strasse 2, D-57068 Siegen, Germany
| | - Michael Schmittel
- Center of Micro and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen, Adolf-Reichwein-Strasse 2, D-57068 Siegen, Germany
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70
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Assembly of a self-complementary monomer: Formation of a pH-responsive pillar[5]arene-based supramolecular polymer†. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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71
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Dunlop A, Bowman K, Aarstad O, Skjåk-Bræk G, Stokke BT, Round AN. Polymer sequencing by molecular machines: a framework for predicting the resolving power of a sliding contact force spectroscopy sequencing method. NANOSCALE 2017; 9:15089-15097. [PMID: 28967943 DOI: 10.1039/c7nr03358c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We evaluate an AFM-based single molecule force spectroscopy method for mapping sequences in otherwise difficult to sequence heteropolymers, including glycosylated proteins and glycans. The sliding contact force spectroscopy (SCFS) method exploits a sliding contact made between a nanopore threaded over a polymer axle and an AFM probe. We find that for sliding α- and β-cyclodextrin nanopores over a wide range of hydrophilic monomers, the free energy of sliding is proportional to the sum of two dimensionless, easily calculable parameters representing the relative partitioning of the monomer inside the nanopore or in the aqueous phase, and the friction arising from sliding the nanopore over the monomer. Using this relationship we calculate sliding energies for nucleic acids, amino acids, glycan and synthetic monomers and predict on the basis of these calculations that SCFS will detect N- and O-glycosylation of proteins and patterns of sidechains in glycans. For these applications, SCFS offers an alternative to sequence mapping by mass spectrometry or newly-emerging nanopore technologies that may be easily implemented using a standard AFM.
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Affiliation(s)
- Alex Dunlop
- HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK
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72
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Molecular photoswitches mediating the strain-driven disassembly of supramolecular tubules. Proc Natl Acad Sci U S A 2017; 114:11850-11855. [PMID: 29078355 DOI: 10.1073/pnas.1711184114] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Chemists have created molecular machines and switches with specific mechanical responses that were typically demonstrated in solution, where mechanically relevant motion is dissipated in the Brownian storm. The next challenge consists of designing specific mechanisms through which the action of individual molecules is transmitted to a supramolecular architecture, with a sense of directionality. Cellular microtubules are capable of meeting such a challenge. While their capacity to generate pushing forces by ratcheting growth is well known, conversely these versatile machines can also pull microscopic objects apart through a burst of their rigid tubular structure. One essential feature of this disassembling mechanism is the accumulation of strain in the tubules, which develops when tubulin dimers change shape, triggered by a hydrolysis event. We envision a strategy toward supramolecular machines generating directional pulling forces by harnessing the mechanically purposeful motion of molecular switches in supramolecular tubules. Here, we report on wholly synthetic, water-soluble, and chiral tubules that incorporate photoswitchable building blocks in their supramolecular architecture. Under illumination, these tubules display a nonlinear operation mode, by which light is transformed into units of strain by the shape changes of individual switches, until a threshold is reached and the tubules unleash the strain energy. The operation of this wholly synthetic and stripped-down system compares to the conformational wave by which cellular microtubules disassemble. Additionally, atomistic simulations provide molecular insight into how strain accumulates to induce destabilization. Our findings pave the way toward supramolecular machines that would photogenerate pulling forces, at the nanoscale and beyond.
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73
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Martin CJ, Lee ATL, Adams RW, Leigh DA. Enzyme-Mediated Directional Transport of a Small-Molecule Walker With Chemically Identical Feet. J Am Chem Soc 2017; 139:11998-12002. [PMID: 28762738 PMCID: PMC5618142 DOI: 10.1021/jacs.7b06503] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We describe a small-molecule "walker" that uses enzyme catalysis to discriminate between the relative positions of its "feet" on a track and thereby move with net directionality. The bipedal walker has identical carboxylic acid feet, and "steps" along an isotactic hydroxyl-group-derivatized polyether track by the formation/breakage of ester linkages. Lipase AS catalyzes the selective hydrolysis of the rear foot of macrocyclized walkers (an information ratchet mechanism), the rear foot producing an (R)-stereocenter at its point of attachment to the track. If the hydrolyzed foot reattaches to the track in front of the bound foot it forms an (S)-stereocenter, which is resistant to enzymatic hydrolysis. Only macrocyclic walker-track conjugates are efficiently hydrolyzed by the enzyme, leading to high processivity of the walker movement along the track. Conventional chemical reagents promote formation of the ester bonds between the walker and the track. Iterative macrocyclization and hydrolysis reactions lead to 68% of walkers taking two steps directionally along a three-foothold track.
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Affiliation(s)
- Christopher J Martin
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alan T L Lee
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Ralph W Adams
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - David A Leigh
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
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74
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Zhang Z, Shao L, Zhou Y, Yang J. Pillar[5]arene-based endo-cavity and exo-wall complexation-drived hierarchical supramolecular polymerization. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28738] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Zhihua Zhang
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Li Shao
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Yujuan Zhou
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Jie Yang
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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75
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Wang X, Wicher B, Ferrand Y, Huc I. Orchestrating Directional Molecular Motions: Kinetically Controlled Supramolecular Pathways of a Helical Host on Rodlike Guests. J Am Chem Soc 2017; 139:9350-9358. [DOI: 10.1021/jacs.7b04884] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiang Wang
- CBMN Laboratory, University of Bordeaux,
CNRS, IPB, Institut Européen de Chimie Biologie, 2 rue Escarpit 33607 Pessac, France
| | - Barbara Wicher
- CBMN Laboratory, University of Bordeaux,
CNRS, IPB, Institut Européen de Chimie Biologie, 2 rue Escarpit 33607 Pessac, France
| | - Yann Ferrand
- CBMN Laboratory, University of Bordeaux,
CNRS, IPB, Institut Européen de Chimie Biologie, 2 rue Escarpit 33607 Pessac, France
| | - Ivan Huc
- CBMN Laboratory, University of Bordeaux,
CNRS, IPB, Institut Européen de Chimie Biologie, 2 rue Escarpit 33607 Pessac, France
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76
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Da Silva Rodrigues R, Mullen KM. Surface-Assembled Mechanically Interlocked Architectures. Chempluschem 2017; 82:814-825. [PMID: 31961569 DOI: 10.1002/cplu.201700065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/09/2017] [Indexed: 01/30/2023]
Abstract
Since the advent of supramolecular chemistry, there has been keen interest in the synthesis of interlocked molecules, given their unique potential to act as receptors, molecular machines and even motors. Despite advances in the complexity of molecular machines that can be synthesised and operated in solution, reports of the operation or even attachment of complex supramolecular systems on solid surfaces are less common. Synthetic challenges and a lack of adequate characterisation techniques to monitor the thermodynamic and kinetic influences governing assembly at the solution-surface interface has slowed progress in this area of research. This Review looks at the developments in the field of covalently assembled interlocked architectures on gold, silica and polymer surfaces, highlighting the differences observed between solution and surface assembly of these unique structures.
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Affiliation(s)
- Rafael Da Silva Rodrigues
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Kathleen M Mullen
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
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77
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Peng L, Zhang P, Chai Y, Yuan R. Bi-directional DNA Walking Machine and Its Application in an Enzyme-Free Electrochemiluminescence Biosensor for Sensitive Detection of MicroRNAs. Anal Chem 2017; 89:5036-5042. [DOI: 10.1021/acs.analchem.7b00418] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Lichun Peng
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Pu Zhang
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Yaqin Chai
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ruo Yuan
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
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78
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Baroncini M, Bergamini G. Azobenzene: A Photoactive Building Block for Supramolecular Architectures. CHEM REC 2017; 17:700-712. [DOI: 10.1002/tcr.201600112] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Massimo Baroncini
- Dipartimento di Chimica “G. Ciamician”; Università di Bologna; via Selmi 2 I-40126 Bologna Italy
| | - Giacomo Bergamini
- Dipartimento di Chimica “G. Ciamician”; Università di Bologna; via Selmi 2 I-40126 Bologna Italy
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79
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Tomczyk KM, Woźny M, Domagała S, Wiȩckowska A, Pawłowska J, Woźniak K, Korybut-Daszkiewicz B. Rotaxanes composed of dibenzo-24-crown-8 and macrocyclic transition metal complexing tetraimine units. NEW J CHEM 2017. [DOI: 10.1039/c7nj00909g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
New rotaxanes, composed of dibenzo-24-crown-8 and the axle containing two tetraazamacrocyclic Ni and/or Cu units, adopt either folded or extended conformations and di-Ni-rotaxanes exhibit a shuttling effect of DB24C8.
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Affiliation(s)
- Karolina M. Tomczyk
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warszawa
- Poland
| | - Mateusz Woźny
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warszawa
- Poland
| | - Sławomir Domagała
- Biological and Chemical Research Centre
- Chemistry Department
- University of Warsaw
- 02-089 Warszawa
- Poland
| | | | | | - Krzysztof Woźniak
- Biological and Chemical Research Centre
- Chemistry Department
- University of Warsaw
- 02-089 Warszawa
- Poland
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80
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Pan J, Cha TG, Li F, Chen H, Bragg NA, Choi JH. Visible/near-infrared subdiffraction imaging reveals the stochastic nature of DNA walkers. SCIENCE ADVANCES 2017; 3:e1601600. [PMID: 28116353 PMCID: PMC5249260 DOI: 10.1126/sciadv.1601600] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 11/30/2016] [Indexed: 05/23/2023]
Abstract
DNA walkers are designed with the structural specificity and functional diversity of oligonucleotides to actively convert chemical energy into mechanical translocation. Compared to natural protein motors, DNA walkers' small translocation distance (mostly <100 nm) and slow reaction rate (<0.1 nm s-1) make single-molecule characterization of their kinetics elusive. An important indication of single-walker kinetics is the rate-limiting reactions that a particular walker design bears. We introduce an integrated super-resolved fluorescence microscopy approach that is capable of long-term imaging to investigate the stochastic behavior of DNA walkers. Subdiffraction tracking and imaging in the visible and second near-infrared spectra resolve walker structure and reaction rates. The distributions of walker kinetics are analyzed using a stochastic model to reveal reaction randomness and the rate-limiting biochemical reaction steps.
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81
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Kassem S, van Leeuwen T, Lubbe AS, Wilson MR, Feringa BL, Leigh DA. Artificial molecular motors. Chem Soc Rev 2017; 46:2592-2621. [DOI: 10.1039/c7cs00245a] [Citation(s) in RCA: 539] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Artificial molecular motors take inspiration from motor proteins, nature's solution for achieving directional molecular level motion. An overview is given of the principal designs of artificial molecular motors and their modes of operation. We identify some key challenges remaining in the field.
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Affiliation(s)
- Salma Kassem
- School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Thomas van Leeuwen
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Anouk S. Lubbe
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | | | - Ben L. Feringa
- Stratingh Institute for Chemistry
- University of Groningen
- 9747 AG Groningen
- The Netherlands
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82
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Whittaker J, Moorthy S, Cremers J, Price JR, McMurtrie JC, Clegg JK. Synthesis of Two 2,2′-Bipyridine Containing Macrocycles for the Preparation of Interlocked Architectures. Aust J Chem 2017. [DOI: 10.1071/ch16710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The synthesis and characterisation of two 28-membered, 2,2′-bipyridine-containing macrocycles in high yield is reported. The first imine-containing macrocycle was formed via a Williamson ether synthesis and showed no evidence of higher oligomer formation. Reduction of the imines with sodium borohydride produced the second macrocycle quantitatively.
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83
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Merindol R, Walther A. Materials learning from life: concepts for active, adaptive and autonomous molecular systems. Chem Soc Rev 2017; 46:5588-5619. [DOI: 10.1039/c6cs00738d] [Citation(s) in RCA: 288] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A broad overview of functional aspects in biological and synthetic out-of-equilibrium systems.
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Affiliation(s)
- Rémi Merindol
- Institute for Macromolecular Chemistry
- Albert-Ludwigs-University Freiburg
- 79106 Freiburg
- Germany
| | - Andreas Walther
- Institute for Macromolecular Chemistry
- Albert-Ludwigs-University Freiburg
- 79106 Freiburg
- Germany
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84
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Xia D, Wang P, Shi B. Cu(II) Ion-Responsive Self-Assembly Based on a Water-Soluble Pillar[5]arene and a Rhodamine B-Containing Amphiphile in Aqueous Media. Org Lett 2016; 19:202-205. [PMID: 28029260 DOI: 10.1021/acs.orglett.6b03486] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cu(II) ion-responsive self-assembly in aqueous media was achieved based on a water-soluble pillar[5]arene host and a rhodamine B-containing amphiphile guest. The host-guest complex acted as a supra-amphiphile and self-assembled into vesicles. After addition of Cu(II), vesicles turned into solid nanoparticles, accompanied by the color change of the solution from colorless to red and a fluorescence "on" phenomenon.
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Affiliation(s)
- Danyu Xia
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Pi Wang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
| | - Bingbing Shi
- Department of Chemistry, Zhejiang University , Hangzhou 310027, P. R. China
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85
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Burkhart C, Haberhauer G. A Light- and Electricity-Driven Molecular Pushing Motor. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601371] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Christoph Burkhart
- Institut für Organische Chemie, Fakultät für Chemie; Universität Duisburg-Essen; Universitätsstraße 7 45117 Essen Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Fakultät für Chemie; Universität Duisburg-Essen; Universitätsstraße 7 45117 Essen Germany
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86
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Kistemaker JCM, Pizzolato SF, van Leeuwen T, Pijper TC, Feringa BL. Spectroscopic and Theoretical Identification of Two Thermal Isomerization Pathways for Bistable Chiral Overcrowded Alkenes. Chemistry 2016; 22:13478-87. [DOI: 10.1002/chem.201602276] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Jos C. M. Kistemaker
- Centre for Systems Chemistry; Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Stefano F. Pizzolato
- Centre for Systems Chemistry; Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Thomas van Leeuwen
- Centre for Systems Chemistry; Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Thomas C. Pijper
- Centre for Systems Chemistry; Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 4 9747 AG 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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87
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Ikegami T, Kageyama Y, Obara K, Takeda S. Dissipative and Autonomous Square-Wave Self-Oscillation of a Macroscopic Hybrid Self-Assembly under Continuous Light Irradiation. Angew Chem Int Ed Engl 2016; 55:8239-43. [DOI: 10.1002/anie.201600218] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/09/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Tomonori Ikegami
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Sapporo 060-0810 Japan
| | - Yoshiyuki Kageyama
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
- JST PRESTO; Kawaguchi 332-0012 Japan
| | - Kazuma Obara
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Sadamu Takeda
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
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88
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Ikegami T, Kageyama Y, Obara K, Takeda S. Dissipative and Autonomous Square-Wave Self-Oscillation of a Macroscopic Hybrid Self-Assembly under Continuous Light Irradiation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600218] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Tomonori Ikegami
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Sapporo 060-0810 Japan
| | - Yoshiyuki Kageyama
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
- JST PRESTO; Kawaguchi 332-0012 Japan
| | - Kazuma Obara
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Sadamu Takeda
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
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89
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Kageyama Y, Ikegami T, Kurokome Y, Takeda S. Mechanism of Macroscopic Motion of Oleate Helical Assemblies: Cooperative Deprotonation of Carboxyl Groups Triggered by Photoisomerization of Azobenzene Derivatives. Chemistry 2016; 22:8669-75. [PMID: 27165777 DOI: 10.1002/chem.201600426] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Yoshiyuki Kageyama
- Department of Chemistry; Faculty of Science; Hokkaido University; North-10, West-8 Sapporo 060-0810 Japan), Fax: (+81) 11 706 4841
- JST PRESTO, Kawaguchi, 332-0012 (Japan)
| | - Tomonori Ikegami
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; North-10, West-8 Sapporo 060-0810 Japan
| | - Yuta Kurokome
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; North-10, West-8 Sapporo 060-0810 Japan
| | - Sadamu Takeda
- Department of Chemistry; Faculty of Science; Hokkaido University; North-10, West-8 Sapporo 060-0810 Japan), Fax: (+81) 11 706 4841
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90
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Cai S, Chen M, Liu M, He W, Liu Z, Wu D, Xia Y, Yang H, Chen J. A signal amplification electrochemical aptasensor for the detection of breast cancer cell via free-running DNA walker. Biosens Bioelectron 2016; 85:184-189. [PMID: 27176917 DOI: 10.1016/j.bios.2016.05.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/16/2016] [Accepted: 05/02/2016] [Indexed: 12/24/2022]
Abstract
Herein, a signal magnification electrochemical aptasensor for the detection of breast cancer cell via free-running DNA walker is constructed. Theoretically, just one DNA walker, released by target cell-responsive reaction, can automatically cleave all D-RNA (a chimeric DNA/RNA oligonucleotide with a cleavage point rArU) anchored on electrode into shorter produces, giving rise to considerably detectable signal finally. Under the optimal conditions, the electrochemical signal decreased linearly with the concentration of MCF-7 cell. The linear range is from 0 to 500 cells mL(-1) with a detection limit of 47 cellsmL(-1). In a word, this approach may have advantages over traditional reported DNA machines for bioassay, particularly in terms of ease of operation, cost efficiency, free of labeling and of complex track design, which may hold great potential for wide application.
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Affiliation(s)
- Shuxian Cai
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Mei Chen
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Mengmeng Liu
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Wenhui He
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Zhijing Liu
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Dongzhi Wu
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Yaokun Xia
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Huanghao Yang
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian Province 350002, PR China
| | - Jinghua Chen
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China.
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91
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Huang MJ, Kapral R. A catalytic oligomeric motor that walks along a filament track. J Chem Phys 2016; 142:245102. [PMID: 26133457 DOI: 10.1063/1.4922926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Most biological motors in the cell execute chemically powered conformational changes as they walk on biopolymer filaments in order to carry out directed transport functions. Synthetic motors that operate in a similar manner are being studied since they have the potential to perform similar tasks in a variety of applications. In this paper, a synthetic nanomotor that moves along a filament track, without invoking motor conformational changes, is constructed and its properties are studied in detail. The motor is an oligomer comprising three linked beads with specific binding properties. The filament track is a stiff polymer chain, also described by a linear chain of linked coarse-grained molecular groups modeled as beads. Reactions on the filament that are catalyzed by a motor bead and use fuel in the environment, in conjunction within the binding affinities of the motor beads to the filament beads, lead to directed motion. The system operates out of equilibrium due to the state of the filament and supply of fuel. The motor, filament, and surrounding medium are all described at microscopic level that permits a full analysis of the motor motion. A stochastic model that captures the main trends seen in the simulations is also presented. The results of this study point to some of the key features that could be used to construct nanomotors that undergo biased walks powered by chemical reactions on filaments.
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Affiliation(s)
- Mu-Jie Huang
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Raymond Kapral
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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92
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Suárez GP, Hoyuelos M, Chialvo DR. Invited review: Fluctuation-induced transport. From the very small to the very large scales. PAPERS IN PHYSICS 2016. [DOI: 10.4279/pip.080004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The study of fluctuation-induced transport is concerned with the directed motion of particles on a substrate when subjected to a fluctuating external field. Work over the last two decades provides now precise clues on how the average transport depends on three fundamental aspects: the shape of the substrate, the correlations of the fluctuations and the mass, geometry, interaction and density of the particles. These three aspects, reviewed here, acquire additional relevance because the same notions apply to a bewildering variety of problems at very different scales, from the small nano or micro-scale, where thermal fluctuations effects dominate, up to very large scales including ubiquitous cooperative phenomena in granular materials. Received: 30 October 2015, Accepted: 4 February 2016; Edited by: G. Martínez Mekler; Reviewed by: J. Mateos, Departamento de Sistemas Complejos, Instituto de Física, Universidad Nacional Autónoma de México, México.; DOI: http://dx.doi.org/10.4279/PIP.080004Cite as: G P Suárez, M Hoyuelos, D R Chialvo, Papers in Physics 8, 080004 (2016)This paper, by G P Suárez, M Hoyuelos, D R Chialvo, is licensed under the Creative Commons Attribution License 3.0.
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93
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Orrillo AG, Escalante AM, Furlan RLE. Dithioacetal Exchange: A New Reversible Reaction for Dynamic Combinatorial Chemistry. Chemistry 2016; 22:6746-9. [PMID: 26990904 DOI: 10.1002/chem.201600208] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Indexed: 12/22/2022]
Abstract
Reversibility of dithioacetal bond formation is reported under acidic mild conditions. Its utility for dynamic combinatorial chemistry was explored by combining it with orthogonal disulfide exchange. In such a setup, thiols are positioned at the intersection of both chemistries, constituting a connecting node between temporally separated networks.
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Affiliation(s)
- A Gastón Orrillo
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina
| | - Andrea M Escalante
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina
| | - Ricardo L E Furlan
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Ocampo y Esmeralda, Rosario, 2000), Argentina. .,Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario, 2000), Argentina.
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94
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Yang X, Tang Y, Mason SD, Chen J, Li F. Enzyme-Powered Three-Dimensional DNA Nanomachine for DNA Walking, Payload Release, and Biosensing. ACS NANO 2016; 10:2324-30. [PMID: 26785347 DOI: 10.1021/acsnano.5b07102] [Citation(s) in RCA: 254] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Herein, we report a DNA nanomachine, built from a DNA-functionalized gold nanoparticle (DNA-AuNP), which moves a DNA walker along a three-dimensional (3-D) DNA-AuNP track and executes the task of releasing payloads. The movement of the DNA walker is powered by a nicking endonuclease that cleaves specific DNA substrates on the track. During the movement, each DNA walker cleaves multiple substrates, resulting in the rapid release of payloads (predesigned DNA sequences and their conjugates). The 3-D DNA nanomachine is highly efficient due to the high local effective concentrations of all DNA components that have been co-conjugated on the same AuNP. Moreover, the activity of the 3-D DNA nanomachine can be controlled by introducing a protecting DNA probe that can hybridize to or dehybridize from the DNA walker in a target-specific manner. This property allows us to tailor the DNA nanomachine into a DNA nanosensor that is able to achieve rapid, isothermal, and homogeneous signal amplification for specific nucleic acids in both buffer and a complicated biomatrix.
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Affiliation(s)
- Xiaolong Yang
- Department of Chemistry, Centre for Biotechnology, Brock University , St. Catharines, Ontario, Canada L2S3A1
| | - Yanan Tang
- Department of Chemistry, Centre for Biotechnology, Brock University , St. Catharines, Ontario, Canada L2S3A1
| | - Sean D Mason
- Department of Chemistry, Centre for Biotechnology, Brock University , St. Catharines, Ontario, Canada L2S3A1
| | - Junbo Chen
- Analytical & Testing Center, Sichuan University , Chengdu, Sichuan 610064, China
| | - Feng Li
- Department of Chemistry, Centre for Biotechnology, Brock University , St. Catharines, Ontario, Canada L2S3A1
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95
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Abstract
Integrating photoswitchable unit into helical macromolecules allows their conformations to be externally controlled by light and therefore provides a versatile strategy to design photoresponsive materials.
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Affiliation(s)
- Zhilin Yu
- Department of Chemistry and IRIS Adlershof
- Humboldt-Universität zu Berlin
- 12489 Berlin
- Germany
| | - Stefan Hecht
- Department of Chemistry and IRIS Adlershof
- Humboldt-Universität zu Berlin
- 12489 Berlin
- Germany
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96
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Scottwell SØ, Crowley JD. Ferrocene-containing non-interlocked molecular machines. Chem Commun (Camb) 2016; 52:2451-64. [DOI: 10.1039/c5cc09569g] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ferrocene is chemically robust and readily functionalized which enables its facile incorporation into more complex molecular systems. This coupled with ferrocene's reversible redox properties and ability to function as a “molecular ball bearing” has led to the use of ferrocene as a component in wide range of non-interlocked synthetic molecular machine systems.
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97
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Liu X, Xu JF, Wang Z, Zhang X. Photo-responsive supramolecular polymers synthesized by olefin metathesis polymerization from supramonomers. Polym Chem 2016. [DOI: 10.1039/c6py00071a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This communication reports the construction of photo-responsive supramolecular polymers that are synthesized by olefin metathesis polymerization from quadruple hydrogen bonded supramonomers.
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Affiliation(s)
- Xiaoguang Liu
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Jiang-Fei Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Zhiqiang Wang
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
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98
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Pick-up, transport and release of a molecular cargo using a small-molecule robotic arm. Nat Chem 2015; 8:138-43. [PMID: 26791896 DOI: 10.1038/nchem.2410] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 10/23/2015] [Indexed: 12/24/2022]
Abstract
Modern-day factory assembly lines often feature robots that pick up, reposition and connect components in a programmed manner. The idea of manipulating molecular fragments in a similar way has to date only been explored using biological building blocks (specifically DNA). Here, we report on a wholly artificial small-molecule robotic arm capable of selectively transporting a molecular cargo in either direction between two spatially distinct, chemically similar, sites on a molecular platform. The arm picks up/releases a 3-mercaptopropanehydrazide cargo by formation/breakage of a disulfide bond, while dynamic hydrazone chemistry controls the cargo binding to the platform. Transport is controlled by selectively inducing conformational and configurational changes within an embedded hydrazone rotary switch that steers the robotic arm. In a three-stage operation, 79-85% of 3-mercaptopropanehydrazide molecules are transported in either (chosen) direction between the two platform sites, without the cargo at any time fully dissociating from the machine nor exchanging with other molecules in the bulk.
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99
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Urban MJ, Zhou C, Duan X, Liu N. Optically Resolving the Dynamic Walking of a Plasmonic Walker Couple. NANO LETTERS 2015; 15:8392-6. [PMID: 26571209 DOI: 10.1021/acs.nanolett.5b04270] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Deterministic placement and dynamic manipulation of individual plasmonic nanoparticles with nanoscale precision feature an important step toward active nanoplasmonic devices with prescribed levels of performance and functionalities at optical frequencies. In this Letter, we demonstrate a plasmonic walker couple system, in which two gold nanorod walkers can independently or simultaneously perform stepwise walking powered by DNA hybridization along the same DNA origami track. We utilize optical spectroscopy to resolve such dynamic walking with nanoscale steps well below the optical diffraction limit. We also show that the number of walkers and the optical response of the system can be correlated. Our studies exemplify the power of plasmonics, when integrated with DNA nanotechnology for realization of advanced artificial nanomachinery with tailored optical functionalities.
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Affiliation(s)
- Maximilian J Urban
- Max Planck Institute for Intelligent Systems , Heisenbergstrasse 3, D-70569 Stuttgart, Germany
| | - Chao Zhou
- Max Planck Institute for Intelligent Systems , Heisenbergstrasse 3, D-70569 Stuttgart, Germany
| | - Xiaoyang Duan
- Max Planck Institute for Intelligent Systems , Heisenbergstrasse 3, D-70569 Stuttgart, Germany
| | - Na Liu
- Max Planck Institute for Intelligent Systems , Heisenbergstrasse 3, D-70569 Stuttgart, Germany
- Kirchhoff Institute for Physics, University of Heidelberg , Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany
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100
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Zenkina OV, Gidron O, Shimon LJW, Iron MA, van der Boom ME. Mechanistic Aspects of Aryl-Halide Oxidative Addition, Coordination Chemistry, and Ring-Walking by Palladium. Chemistry 2015; 21:16113-25. [PMID: 26382568 DOI: 10.1002/chem.201501580] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 07/17/2015] [Indexed: 11/07/2022]
Abstract
This contribution describes the reactivity of a zero-valent palladium phosphine complex with substrates that contain both an aryl halide moiety and an unsaturated carbon-carbon bond. Although η(2) -coordination of the metal center to a C=C or C≡C unit is kinetically favored, aryl halide bond activation is favored thermodynamically. These quantitative transformations proceed under mild reaction conditions in solution or in the solid state. Kinetic measurements indicate that formation of η(2) -coordination complexes are not nonproductive side-equilibria, but observable (and in several cases even isolated) intermediates en route to aryl halide bond cleavage. At the same time, DFT calculations show that the reaction with palladium may proceed through a dissociation-oxidative addition mechanism rather than through a haptotropic intramolecular process (i.e., ring walking). Furthermore, the transition state involves coordination of a third phosphine to the palladium center, which is lost during the oxidative addition as the C-halide bond is being broken. Interestingly, selective activation of aryl halides has been demonstrated by adding reactive aryl halides to the η(2) -coordination complexes. The product distribution can be controlled by the concentration of the reactants and/or the presence of excess phosphine.
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Affiliation(s)
- Olena V Zenkina
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot (Israel).,Current address: Faculty of Science, University of Ontario Institute of Technology, Oshawa, ON (Canada)
| | - Ori Gidron
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot (Israel)
| | - Linda J W Shimon
- Department of Chemical Research Support, The Weizmann Institute of Science, 76100 Rehovot (Israel)
| | - Mark A Iron
- Department of Chemical Research Support, The Weizmann Institute of Science, 76100 Rehovot (Israel)
| | - Milko E van der Boom
- Department of Organic Chemistry, The Weizmann Institute of Science, 76100 Rehovot (Israel).
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