1
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Morse J, Nadiveedhi MR, Schmidt M, Tang FK, Hladun C, Ganesh P, Qiu Z, Leung K. Tunable Cytosolic Chloride Indicators for Real-Time Chloride Imaging in Live Cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.08.606814. [PMID: 39149292 PMCID: PMC11326291 DOI: 10.1101/2024.08.08.606814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Chloride plays a crucial role in various cellular functions, and its level is regulated by a variety of chloride transporters and channels. However, to date, we still lack the capability to image instantaneous ion flux through chloride channels at single-cell level. Here, we developed a series of cell-permeable, pH-independent, chloride-sensitive fluorophores for real-time cytosolic chloride imaging, which we call CytoCl dyes. We demonstrated the ability of CytoCl dyes to monitor cytosolic chloride and used it to uncover the rapid changes and transient events of halide flux, which cannot be captured by steady-state imaging. Finally, we successfully imaged the proton-activated chloride channel-mediated ion flux at single-cell level, which is, to our knowledge, the first real-time imaging of ion flux through a chloride channel in unmodified cells. By enabling the imaging of single-cell level ion influx through chloride channels and transporters, CytoCl dyes can expand our understanding of ion flux dynamics, which is critical for characterization and modulator screening of these membrane proteins. A conjugable version of CytoCl dyes was also developed for its customization across different applications.
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Affiliation(s)
- Jared Morse
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
| | | | - Matthias Schmidt
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
| | - Fung-Kit Tang
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
| | - Colby Hladun
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
| | - Prasanna Ganesh
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
| | - Zhaozhu Qiu
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, MD 21205, United States
| | - Kaho Leung
- Department of Chemistry & Biochemistry, Clarkson University, NY 13676, United States
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2
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Barlow SR, Halcovitch NR, Evans NH. A pyridine- N-oxide catenane for cation recognition. Org Biomol Chem 2024; 22:3001-3008. [PMID: 38526411 DOI: 10.1039/d4ob00176a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
The rapid preparation of a pyridine-N-oxide containing [2]catenane is described. The [2]catenane was characterized by NMR spectroscopy, mass spectrometry and X-ray single crystal structure determination. 1H NMR titration experiments reveal the [2]catenane may be reversibly protonated, as well as an ability to bind lithium cations more strongly than sodium cations.
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Affiliation(s)
- Sean R Barlow
- Department of Chemistry, Lancaster University, Lancaster, LA1 4YB, UK.
| | | | - Nicholas H Evans
- Department of Chemistry, Lancaster University, Lancaster, LA1 4YB, UK.
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3
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Das RS, Maiti D, Kar S, Bera T, Mukherjee A, Saha PC, Mondal A, Guha S. Design of Water-Soluble Rotaxane-Capped Superparamagnetic, Ultrasmall Fe 3O 4 Nanoparticles for Targeted NIR Fluorescence Imaging in Combination with Magnetic Resonance Imaging. J Am Chem Soc 2023; 145:20451-20461. [PMID: 37694929 DOI: 10.1021/jacs.3c06232] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Integrating an NIR fluorescent probe with a magnetic resonance imaging (MRI) agent to harvest complementary imaging information is challenging. Here, we have designed water-soluble, biocompatible, noncytotoxic, bright-NIR-emitting, sugar-functionalized, mechanically interlocked molecules (MIMs)-capped superparamagnetic ultrasmall Fe3O4 NPs for targeted multimodal imaging. Dual-functional stoppers containing an unsymmetrical NIR squaraine dye interlocked within a macrocycle to construct multifunctional MIMs are developed with enhanced NIR fluorescence efficiency and durability. One of the stoppers of the axle is composed of a lipophilic cationic TPP+ functionality to target mitochondria, and the other stopper comprises a dopamine-containing catechol group to anchor at the surface of the synthesized Fe3O4 NPs. Fe3O4 NPs surface-coated with targeted NIR rotaxanes help to deliver ultrasmall magnetic NPs specifically inside the mitochondria. Two carbohydrate moieties are conjugated with the macrocycle of the rotaxane via click chemistry to improve the water solubility of MitoSQRot-(Carb-OH)2-DOPA-Fe3O4 NPs. Water-soluble, rotaxane-capped Fe3O4 NPs are used for live-cell mitochondria-targeted NIR fluorescence confocal imaging, 3D and multicolor imaging in combination with T2-weighted MRI on a 9.4 T MR scanner with a high relaxation rate (r2) of 180.7 mM-1 s-1. Biocompatible, noncytotoxic, ultrabright NIR rotaxane-capped superparamagnetic ultrasmall monodisperse Fe3O4 NPs could be a promising agent for targeted multimodal imaging applications.
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Affiliation(s)
- Rabi Sankar Das
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Debabrata Maiti
- Division of Medical Engineering, School of Medicine, The Jikei University, Tokyo 105-8461, Japan
| | - Samiran Kar
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Tapas Bera
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Ayan Mukherjee
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Pranab Chandra Saha
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Aniruddha Mondal
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Samit Guha
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
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4
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Hum G, Phang SJI, Ong HC, León F, Quek S, Khoo YXJ, Li C, Li Y, Clegg JK, Díaz J, Stuparu MC, García F. Main Group Molecular Switches with Swivel Bifurcated to Trifurcated Hydrogen Bond Mode of Action. J Am Chem Soc 2023. [PMID: 37267593 DOI: 10.1021/jacs.2c12713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Artificial molecular machines have captured the full attention of the scientific community since Jean-Pierre Sauvage, Fraser Stoddart, and Ben Feringa were awarded the 2016 Nobel Prize in Chemistry. The past and current developments in molecular machinery (rotaxanes, rotors, and switches) primarily rely on organic-based compounds as molecular building blocks for their assembly and future development. In contrast, the main group chemical space has not been traditionally part of the molecular machine domain. The oxidation states and valency ranges within the p-block provide a tremendous wealth of structures with various chemical properties. Such chemical diversity─when implemented in molecular machines─could become a transformative force in the field. Within this context, we have rationally designed a series of NH-bridged acyclic dimeric cyclodiphosphazane species, [(μ-NH){PE(μ-NtBu)2PE(NHtBu)}2] (E = O and S), bis-PV2N2, displaying bimodal bifurcated R21(8) and trifurcated R31(8,8) hydrogen bonding motifs. The reported species reversibly switch their topological arrangement in the presence and absence of anions. Our results underscore these species as versatile building blocks for molecular machines and switches, as well as supramolecular chemistry and crystal engineering based on cyclophosphazane frameworks.
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Affiliation(s)
- Gavin Hum
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Si Jia Isabel Phang
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - How Chee Ong
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felix León
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Shina Quek
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yi Xin Joycelyn Khoo
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Chenfei Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Yongxin Li
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Jack K Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, Cooper Road, St Lucia 4072, Queensland, Australia
| | - Jesús Díaz
- Departamento de Química Orgánica e Inorgánica, Facultad de Veterinaria Extremadura, Avda de la Universidad s/n, Cáceres 10003, Spain
| | - Mihaiela C Stuparu
- School of Chemistry, Chemical Engineering & Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore, Singapore
| | - Felipe García
- Departamento de Química Orgánica e Inorgánica, Facultad de Química, Universidad de Oviedo, Julián Claveria 8, Oviedo 33006, Asturias, Spain
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
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5
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Wu CH, Nhien PQ, Cuc TTK, Hue BTB, Lin HC. Designs and Applications of Multi-stimuli Responsive FRET Processes in AIEgen-Functionalized and Bi-fluorophoric Supramolecular Materials. Top Curr Chem (Cham) 2022; 381:2. [PMID: 36495421 DOI: 10.1007/s41061-022-00412-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 11/12/2022] [Indexed: 12/13/2022]
Abstract
Materials capable of displaying strong ratiometric fluorescence with Förster resonance energy transfer (FRET) processes have attracted much research interest because of various chemosensor and biomedical applications. This review highlights several popular strategies in designing FRET-OFF/ON mechanisms of ratiometric fluorescence systems. In particular, the developments of organic and polymeric FRET materials featuring aggregation-induced emission-based luminogens (AIEgens), supramolecular assemblies, photochromic molecular switches and surfactant-induced AIE/FRET mechanisms are presented. AIEgens have been frequently employed as FRET donor and/or acceptor fluorophores to obtain enhanced ratiometric fluorescences in solution and solid states. Since AIE effects and FRET processes rely on controllable distances between fluorophores, many interesting fluorescent properties can be designed by regulating aggregation states in polymers and supramolecular systems. Photo-switchable fluorophores, such as spiropyran and diarylethene, provide drastic changes in fluorescence spectra upon photo-induced isomerizations, leading to photo-switching mechanisms to activate/deactivate FRET processes. Supramolecular assemblies offer versatile platforms to regulate responsive FRET processes effectively. In rotaxane structures, the donor-acceptor distance and FRET efficiency can be tuned by acid/base-controlled shuttling of the macrocycle component. The tunable supramolecular interactions are strongly influenced by external factors (such as pH values, temperatures, analytes, surfactants, UV-visible lights, etc.), which induce the assembly and disassembly of host-guest systems and thus their FRET-ON/FRET-OFF behavior. In addition, the changes in donor or acceptor fluorescence profiles upon detections of analytes can also sufficiently alter the FRET behavior and result in different ratiometric fluorescence outputs. The strategies and examples provided in this review offer the insights and toolkits for future FRET-based material developments.
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Affiliation(s)
- Chia-Hua Wu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan
| | - Pham Quoc Nhien
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, 94000, Viet Nam
| | - Tu Thi Kim Cuc
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan
| | - Bui Thi Buu Hue
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, 94000, Viet Nam
| | - Hong-Cheu Lin
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan.
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan.
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6
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Algar JL, Findlay JA, Evans JD, Preston D. A Switchable Palladium(II) Trefoil Entangled Tetrahedron with Temperature Dependence and Concentration Independence. Angew Chem Int Ed Engl 2022; 61:e202210476. [PMID: 35922393 PMCID: PMC9805230 DOI: 10.1002/anie.202210476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 01/09/2023]
Abstract
Self-assembly makes metallo-interlocked architectures attractive targets, but being in equilibrium with smaller species means that they can suffer from dilution effects. We show that a junctioned system gives rise to a [Pd4 (L)2 ]8+ trefoil entangled tetrahedron irrespective of concentration. Heating the sample reversibly shifts the equilibrium from the knot to an isomeric non-interlocked dual metallo-cycle, demonstrating that thermodynamic equilibria can still be exploited for switching even in the absence of concentration effects.
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Affiliation(s)
- Jess L. Algar
- Research School of ChemistryAustralian National UniversityCanberraACT 2600Australia
| | - James A. Findlay
- Research School of ChemistryAustralian National UniversityCanberraACT 2600Australia
| | - Jack D. Evans
- Centre for Advanced Nanomaterials and Department of ChemistryThe University of AdelaideAdelaideSA 5000Australia
| | - Dan Preston
- Research School of ChemistryAustralian National UniversityCanberraACT 2600Australia
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7
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Algar JL, Findlay JA, Evans JD, Preston D. A Switchable Palladium(II) Trefoil Entangled Tetrahedron with Temperature Dependence and Concentration Independence. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jess L. Algar
- Australian National University Research School of Chemistry AUSTRALIA
| | - James A. Findlay
- Australian National University Research School of Chemistry AUSTRALIA
| | - Jack D. Evans
- University of Adelaide Department of Chemistry AUSTRALIA
| | - Dan Preston
- Australian National University Research School of Chemistry Building 137Sullivan Creek Road26010Australia 9200 Canberra AUSTRALIA
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8
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Hollstein S, Shyshov O, Hanževački M, Zhao J, Rudolf T, Jäger CM, von Delius M. Dynamic Covalent Self-Assembly of Chloride- and Ion-Pair-Templated Cryptates. Angew Chem Int Ed Engl 2022; 61:e202201831. [PMID: 35384202 PMCID: PMC9400851 DOI: 10.1002/anie.202201831] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Indexed: 12/17/2022]
Abstract
While supramolecular hosts capable of binding and transporting anions and ion pairs are now widely available, self‐assembled architectures are still rare, even though they offer an inherent mechanism for the release of the guest ion(s). In this work, we report the dynamic covalent self‐assembly of tripodal, urea‐based anion cryptates that are held together by two orthoester bridgeheads. These hosts exhibit affinity for anions such as Cl−, Br− or I− in the moderate range that is typically advantageous for applications in membrane transport. In unprecedented experiments, we were able to dissociate the Cs⋅Cl ion pair by simultaneously assembling suitably sized orthoester hosts around the Cs+ and the Cl− ion.
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Affiliation(s)
- Selina Hollstein
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Oleksandr Shyshov
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Marko Hanževački
- Department of Chemical and Environmental Engineering, University of Nottingham University Park, Nottingham, NG7 2RD, UK
| | - Jie Zhao
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Tamara Rudolf
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Christof M Jäger
- Department of Chemical and Environmental Engineering, University of Nottingham University Park, Nottingham, NG7 2RD, UK
| | - Max von Delius
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
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9
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Li X, Xie J, Du Z, Jiang L, Li G, Ling S, Zhu K. Docking rings in a solid: reversible assembling of pseudorotaxanes inside a zirconium metal-organic framework. Chem Sci 2022; 13:6291-6296. [PMID: 35733896 PMCID: PMC9159108 DOI: 10.1039/d2sc01497a] [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: 03/15/2022] [Accepted: 04/26/2022] [Indexed: 11/22/2022] Open
Abstract
An unprecedented zirconium metal–organic framework featuring a T-shaped benzimidazole strut was constructed and employed as a sponge-like material for selective absorption of macrocyclic guests. The neutral benzimidazole domain of the as-synthesized framework can be readily protonated and fully converted to benzimidazolium. Mechanical threading of [24]crown-8 ether wheels onto recognition sites to form pseudorotaxanes was evidenced by solution nuclear magnetic resonance, solid-state fluorescence, and infrared spectroscopy. Selective absorption of [24]crown-8 ether rather than its dibenzo counterpart was also observed. Further study reveals that this binding process is reversible and acid–base switchable. The success of docking macrocyclic guests in crystals via host–guest interactions provides an alternative route to complex functional materials with interpenetrated structures. A T-shaped ligand was designed as struts for building a zirconium metal–organic framework. Acid–base switchable docking and releasing a 24-membered crown ether inside crystals was successfully accomplished via post-synthetic modification.![]()
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Affiliation(s)
- Xia Li
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
| | - Jialin Xie
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
| | - Zhenglin Du
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
| | - Long Jiang
- Instrumental Analysis and Research Centre, Sun Yat-Sen University Guangzhou 510275 China
| | - Guangqin Li
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
| | - Sanliang Ling
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham Nottingham NG7 2RD UK
| | - Kelong Zhu
- School of Chemistry, Sun Yat-Sen University Guangzhou 510275 China
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10
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Hollstein S, Shyshov O, Hanževački M, Zhao J, Rudolf T, Jäger CM, Delius M. Dynamisch kovalente Selbstassemblierung von Chlorid‐ und Ionenpaar‐templierten Kryptaten. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Selina Hollstein
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Oleksandr Shyshov
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Marko Hanževački
- Department of Chemical and Environmental Engineering University of Nottingham University Park Nottingham NG7 2RD Großbritannien
| | - Jie Zhao
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Tamara Rudolf
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Christof M. Jäger
- Department of Chemical and Environmental Engineering University of Nottingham University Park Nottingham NG7 2RD Großbritannien
| | - Max Delius
- Institut für Organische Chemie Universität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
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11
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N-Phenylcarbazole substituted bis(hexylthiophen-2-yl)-benzothiadiazoles as deep red emitters for hole-transporting layer free solution-processed OLEDs. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113509] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Bej S, Nandi M, Ghosh P. A Cd(ii) and Zn(ii) selective naphthyl based [2]rotaxane acts as an exclusive Zn(ii) sensor upon further functionalization with pyrene. Dalton Trans 2021; 50:294-303. [PMID: 33300925 DOI: 10.1039/d0dt03645e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new multi-functional [2]rotaxane, ROTX, has been synthesized via a Cu(i) catalysed azide-alkyne cycloaddition reaction between Ni(ii) templated azide terminated pseudorotaxane composed of a naphthalene based heteroditopic wheel, NaphMC, and an alkyne terminated stopper. Subsequently, ROTX has been functionalized with pyrene moieties to develop a bifluorophoric [2]rotaxane, PYROTX, having naphthalene and pyrene moieties. Detailed characterization of these two rotaxanes is performed by utilizing several techniques such as ESI-MS, (1D and 2D) NMR, UV/Vis and PL studies. Comparative metal ion sensing studies of NaphMC (a fluorophoric cyclic receptor), ROTX ([2]rotaxane with a naphthyl fluorophore) and PYROTX ([2]rotaxane having naphthyl and pyrene fluorophores) have been performed to determine the effect of dimensionality/functionalization on the metal ion selectivity. Although NaphMC fails to discriminate between metal ions, ROTX serves as a selective sensor for Zn(ii) and Cd(ii). Importantly, PYROTX shows exclusive selectivity towards Zn(ii) over various transition, alkali and alkaline earth metal ions including Cd(ii).
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Affiliation(s)
- Somnath Bej
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India.
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13
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Iwamoto T, Miyagawa S, Naito M, Tokunaga Y. Orientation of the α-CD component of [2]rotaxanes affects their specific molecular recognition behaviour. Org Chem Front 2021. [DOI: 10.1039/d0qo01337d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An α-CD component enhanced the anion recognition ability of the urea moiety and the deprotonation of the phenol moiety in the axle component in orientationally isomeric [2]rotaxanes with the OH groups on the wide rim of the α-CD, respectively.
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Affiliation(s)
- Takuya Iwamoto
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Shinobu Miyagawa
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Masaya Naito
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
| | - Yuji Tokunaga
- Department of Materials Science and Engineering
- Faculty of Engineering
- University of Fukui
- Bunkyo
- Japan
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14
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Yadav Y, Owens E, Nomura S, Fukuda T, Baek Y, Kashiwagi S, Choi HS, Henary M. Ultrabright and Serum-Stable Squaraine Dyes. J Med Chem 2020; 63:9436-9445. [PMID: 32787096 DOI: 10.1021/acs.jmedchem.0c00617] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Highly stable symmetric and asymmetric squaraine fluorophores have been synthesized featuring an internal salt bridge between a quaternary ammonium cation and the central oxycyclobutenolate ring of the chromophore. Some of our newly synthesized symmetric and asymmetric compounds display increased molar absorptivity, quantum yield in serum, and thermal/photochemical stability over previously reported squaraine-based dyes. Consequently, both classes show great promise in resurfacing the normal environment-labile squaraine dyes as novel imaging agents and scaffolds for fluorescence sensing. Furthermore, incorporating a covalent attachment point away from the conjugated system allows for biological tagging applications without disturbing the optimum optical characteristics of the newly designed fluorophore.
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Affiliation(s)
- Yogesh Yadav
- Department of Chemistry, Georgia State University, 145 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
| | - Eric Owens
- Department of Chemistry, Georgia State University, 145 Piedmont Avenue SE, Atlanta, Georgia 30303, United States.,Center for Diagnostics and Therapeutics, 145 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
| | - Shinsuke Nomura
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States.,Department of Surgery, National Defense Medical College, Tokorozawa, Saitama 359-8513, Japan
| | - Takeshi Fukuda
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Yoonji Baek
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Satoshi Kashiwagi
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Hak Soo Choi
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Maged Henary
- Department of Chemistry, Georgia State University, 145 Piedmont Avenue SE, Atlanta, Georgia 30303, United States.,Center for Diagnostics and Therapeutics, 145 Piedmont Avenue SE, Atlanta, Georgia 30303, United States
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15
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Kashyap S, Singh R, Singh UP. Inorganic and organic anion sensing by azole family members. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213369] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Kage Y, Shimizu S, Kociok-Köhn G, Furuta H, Pantoş GD. Subphthalocyanine-Stoppered [2]Rotaxanes: Synthesis and Size/Energy Threshold of Slippage. Org Lett 2020; 22:1096-1101. [PMID: 31942791 DOI: 10.1021/acs.orglett.9b04620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Subphthalocyanine (SubPc)-stoppered [2]rotaxanes were synthesized for the first time. The rotaxane bearing unsubstituted SubPc as a stopper exhibited an equilibrium of slipping-on and slipping-off, whereas a perfluorinated SubPc stopper completely blocked slippage of the ring due to its slightly larger size. Kinetic studies revealed the Gibbs free energy of activation for the slipping-on and slipping-off processes. The optical properties of the rotaxanes, including photoinduced electron transfer, were also revealed.
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Affiliation(s)
- Yuto Kage
- Department of Chemistry and Biochemistry, Graduate School of Engineering , Kyushu University , Fukuoka 819-0395 , Japan
| | - Soji Shimizu
- Department of Chemistry and Biochemistry, Graduate School of Engineering , Kyushu University , Fukuoka 819-0395 , Japan.,Center for Molecular Systems (CMS) , Kyushu University , Fukuoka 819-0395 , Japan
| | | | - Hiroyuki Furuta
- Department of Chemistry and Biochemistry, Graduate School of Engineering , Kyushu University , Fukuoka 819-0395 , Japan.,Center for Molecular Systems (CMS) , Kyushu University , Fukuoka 819-0395 , Japan
| | - G Dan Pantoş
- Department of Chemistry , University of Bath , Bath BA2 7AY , U.K
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17
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Zajac M, Chakraborty K, Saha S, Mahadevan V, Infield DT, Accardi A, Qiu Z, Krishnan Y. What biologists want from their chloride reporters – a conversation between chemists and biologists. J Cell Sci 2020; 133:133/2/jcs240390. [DOI: 10.1242/jcs.240390] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
ABSTRACT
Impaired chloride transport affects diverse processes ranging from neuron excitability to water secretion, which underlie epilepsy and cystic fibrosis, respectively. The ability to image chloride fluxes with fluorescent probes has been essential for the investigation of the roles of chloride channels and transporters in health and disease. Therefore, developing effective fluorescent chloride reporters is critical to characterizing chloride transporters and discovering new ones. However, each chloride channel or transporter has a unique functional context that demands a suite of chloride probes with appropriate sensing characteristics. This Review seeks to juxtapose the biology of chloride transport with the chemistries underlying chloride sensors by exploring the various biological roles of chloride and highlighting the insights delivered by studies using chloride reporters. We then delineate the evolution of small-molecule sensors and genetically encoded chloride reporters. Finally, we analyze discussions with chloride biologists to identify the advantages and limitations of sensors in each biological context, as well as to recognize the key design challenges that must be overcome for developing the next generation of chloride sensors.
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Affiliation(s)
- Matthew Zajac
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
- Grossman Institute of Neuroscience, Quantitative Biology and Human Behavior, The University of Chicago, Chicago, IL 60637, USA
| | - Kasturi Chakraborty
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
- Grossman Institute of Neuroscience, Quantitative Biology and Human Behavior, The University of Chicago, Chicago, IL 60637, USA
- Ben May Department for Cancer Research, The University of Chicago, Chicago, IL 60637, USA
| | - Sonali Saha
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Vivek Mahadevan
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
| | - Daniel T. Infield
- Department of Molecular Physiology and Biophysics, The University of Iowa, Iowa City, IA 52242, USA
| | - Alessio Accardi
- Department of Anesthesiology, Weill Cornell Medical School, New York, NY 10065, USA
- Department of Physiology and Biophysics, Weill Cornell Medical School, New York, NY 10065, USA
- Department of Biochemistry, Weill Cornell Medical School, New York, NY 10065, USA
| | - Zhaozhu Qiu
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA
| | - Yamuna Krishnan
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
- Grossman Institute of Neuroscience, Quantitative Biology and Human Behavior, The University of Chicago, Chicago, IL 60637, USA
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18
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Affiliation(s)
- Youzhi Xu
- Institut für Organische Chemie und Neue MaterialienUniversität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Max Delius
- Institut für Organische Chemie und Neue MaterialienUniversität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
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19
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Xu Y, von Delius M. The Supramolecular Chemistry of Strained Carbon Nanohoops. Angew Chem Int Ed Engl 2019; 59:559-573. [PMID: 31190449 DOI: 10.1002/anie.201906069] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Indexed: 01/24/2023]
Abstract
Since 1996, a growing number of strained macrocycles, comprising only sp2 - or sp-hybridized carbon atoms within the ring, have become synthetically accessible, with the [n]cycloparaphenyleneacetylenes (CPPAs) and the [n]cycloparaphenylenes (CPPs) being the most prominent examples. Now that robust and relatively general synthetic routes toward a diverse range of nanohoop structures have become available, the research focus is beginning to shift towards the exploration of their properties and applications. From a supramolecular chemistry perspective, these macrocycles offer unique opportunities as a result of their near-perfect circular shape, the unusually high degree of shape-persistence, and the presence of both convex and concave π-faces. In this Minireview, we give an overview on the use of strained carbon-rich nanohoops in host-guest chemistry, the preparation of mechanically interlocked architectures, and crystal engineering.
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Affiliation(s)
- Youzhi Xu
- Institute of Organic Chemistry and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Max von Delius
- Institute of Organic Chemistry and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081, Ulm, Germany
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20
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Fu CY, Li YQ, Chen L, Wang YG, Lin LR. Anion recognition in aqueous solution by cyclic dinuclear square cage-shaped coordination complexes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.118961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Wang L, Tu Y, Valkonen A, Rissanen K, Jiang W. Selective Recognition of Phenazine by 2,6‐Dibutoxylnaphthalene‐Based Tetralactam Macrocycle. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900233] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Li‐Li Wang
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and Technology, Xueyuan Blvd 1088 Shenzhen Guangdong 518055 China
| | - Yi‐Kuan Tu
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and Technology, Xueyuan Blvd 1088 Shenzhen Guangdong 518055 China
| | - Arto Valkonen
- Department of Chemistry, Nanoscience CenterUniversity of Jyvaskyla, P. O. Box 35 Jyväskylä 40014 Finland
| | - Kari Rissanen
- Department of Chemistry, Nanoscience CenterUniversity of Jyvaskyla, P. O. Box 35 Jyväskylä 40014 Finland
| | - Wei Jiang
- Shenzhen Grubbs Institute and Department of ChemistrySouthern University of Science and Technology, Xueyuan Blvd 1088 Shenzhen Guangdong 518055 China
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22
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Wang LL, Tu YK, Yao H, Jiang W. 2,3-Dibutoxynaphthalene-based tetralactam macrocycles for recognizing precious metal chloride complexes. Beilstein J Org Chem 2019; 15:1460-1467. [PMID: 31354862 PMCID: PMC6633862 DOI: 10.3762/bjoc.15.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 06/27/2019] [Indexed: 01/07/2023] Open
Abstract
Two new tetralactam macrocycles with 2,3-dibutoxynaphthalene groups as sidewalls have been synthesized and characterized. The macrocycle containing isophthalamide bridges can bind square-planar chloride coordination complexes of gold(III), platinum(II), and palladium(II) in CDCl3, while the macrocycle with 2,6-pyridine dicarboxamide bridging units cannot. This may be due to the shrunken cavity caused by intramolecular hydrogen bonds in the latter tetralactam macrocycle. The binding of the isophthalamide-based macrocycle is mainly driven by hydrogen bonds and electrostatic interactions. This naphthalene-based macrocycle has similar binding affinities to all the three abovementioned precious metal chloride complexes. This is in contrast to the fact that the tetralactam macrocycle with anthracene as the sidewalls only show good binding affinities to AuCl4 -. The superior binding to all three complexes may be due to the conformational diversity of the naphthalene-based macrocycle, which make it conformationally adaptive to maximize the binding affinities. In addition, the macrocycle shows fluorescent quenching when adding the chloride metal complexes in its solution and may be used as a fluorescent sensor for the detection of these coordination complexes.
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Affiliation(s)
- Li-Li Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Yi-Kuan Tu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Huan Yao
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
| | - Wei Jiang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Xueyuan Boulevard 1088, Shenzhen 518055, China
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23
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Lim JYC, Yuntawattana N, Beer PD, Williams CK. Isoselective Lactide Ring Opening Polymerisation using [2]Rotaxane Catalysts. Angew Chem Int Ed Engl 2019; 58:6007-6011. [PMID: 30861303 PMCID: PMC6519244 DOI: 10.1002/anie.201901592] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 01/25/2023]
Abstract
Polylactide (PLA) is a fully biodegradable and recyclable plastic, produced from a bio-derived monomer: it is a circular economy plastic. Its properties depend upon its stereochemistry and isotactic PLA shows superior thermal-mechanical performances. Here, a new means to control tacticity by exploiting rotaxane conformational dynamism is described. Dynamic achiral [2]rotaxanes can show high isoselectivity (Pi =0.8, 298 K) without requiring any chiral additives and enchain by a chain end control mechanism. The organocatalytic dynamic stereoselectivity is likely applicable to other small-molecule and polymerization catalyses.
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Affiliation(s)
- Jason Y. C. Lim
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
- Current address: Institute of Materials Research and Engineering2 Fusionopolis WaySingapore138634Singapore
| | - Nattawut Yuntawattana
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Paul D. Beer
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
| | - Charlotte K. Williams
- Department of ChemistryUniversity of OxfordChemistry Research LaboratoryMansfield RoadOxfordOX1 3TAUK
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24
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Lim JYC, Yuntawattana N, Beer PD, Williams CK. Isoselective Lactide Ring Opening Polymerisation using [2]Rotaxane Catalysts. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901592] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jason Y. C. Lim
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
- Current address: Institute of Materials Research and Engineering 2 Fusionopolis Way Singapore 138634 Singapore
| | - Nattawut Yuntawattana
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Paul D. Beer
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Charlotte K. Williams
- Department of ChemistryUniversity of OxfordChemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
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25
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Evans NH. Recent Advances in the Synthesis and Application of Hydrogen Bond Templated Rotaxanes and Catenanes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900081] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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26
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Abstract
Oxygen is essential for life. Inspired by the importance of oxygen, we present this critical and current review on lanthanide-based oxygen sensors.
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Affiliation(s)
- Khushboo Iman
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
| | - M. Shahid
- Department of Chemistry
- Aligarh Muslim University
- Aligarh-202002
- India
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27
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Klein HA, Kuhn H, Beer PD. Anion and pH dependent molecular motion by a halogen bonding [2]rotaxane. Chem Commun (Camb) 2019; 55:9975-9978. [PMID: 31367706 DOI: 10.1039/c9cc04752b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bistable [2]rotaxane containing a halogen bonding benzimidazole-iodotriazole station directly conjugated to a naphthalimide station axle component is demonstrated to undergo macrocycle shuttling translocation only upon both protonation and chloride anion recognition. A naked-eye detectable colour response results from the co-conformational change of the host structure.
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Affiliation(s)
- Harry A Klein
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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28
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Langer P, Yang L, Pfeiffer CR, Lewis W, Champness NR. Restricting shuttling in bis(imidazolium)…pillar[5]arene rotaxanes using metal coordination. Dalton Trans 2018; 48:58-64. [PMID: 30403248 DOI: 10.1039/c8dt04096f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Metal coordination to a series of bis (imidazolium)…pillar[5]arene [2]rotaxanes through the formation of metal-carbene bonds facilitates a new strategy to restrict the shuttling motion in [2]rotaxanes. Whereas the pillar[5]arene macrocycle rapidly shuttles along the full length of the bis (imidazolium) rod for the parent [2]rotaxane, Ag(i) coordination to the imidazolium groups through the formation of N-heterocyclic carbenes leads to restricted motion, effectively confining the shuttling motion of the [2]rotaxane. The Ag(i) coordinated [2]rotaxanes can be reacted further, either removing the Ag-carbene species to recreate the parent [2]rotaxane, or reaction with more bulky Pd(ii) species to further restrict the shuttling motion through steric inhibition.
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Affiliation(s)
- Philipp Langer
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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29
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Affiliation(s)
- Teresa L. Mako
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Joan M. Racicot
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
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30
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Denis M, Qin L, Turner P, Jolliffe KA, Goldup SM. A Fluorescent Ditopic Rotaxane Ion-Pair Host. Angew Chem Int Ed Engl 2018; 57:5315-5319. [PMID: 29393993 PMCID: PMC5947583 DOI: 10.1002/anie.201713105] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 12/21/2022]
Abstract
We report a rotaxane based on a simple urea motif that binds Cl- selectively as a separated ion pair with H+ and reports the anion binding event through a fluorescence switch-on response. The host selectively binds Cl- over more basic anions, which deprotonate the framework, and less basic anions, which bind more weakly. The mechanical bond also imparts size selectivity to the ditopic host.
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Affiliation(s)
- Mathieu Denis
- ChemistryUniversity of SouthamptonHighfieldSouthamptonSO17 1BJUK
| | - Lei Qin
- School of ChemistryThe University of SydneySydneyNSW2006Australia
| | - Peter Turner
- School of ChemistryThe University of SydneySydneyNSW2006Australia
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31
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Denis M, Qin L, Turner P, Jolliffe KA, Goldup SM. A Fluorescent Ditopic Rotaxane Ion-Pair Host. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713105] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mathieu Denis
- Chemistry; University of Southampton; Highfield Southampton SO17 1BJ UK
| | - Lei Qin
- School of Chemistry; The University of Sydney; Sydney NSW 2006 Australia
| | - Peter Turner
- School of Chemistry; The University of Sydney; Sydney NSW 2006 Australia
| | | | - Stephen M. Goldup
- Chemistry; University of Southampton; Highfield Southampton SO17 1BJ UK
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32
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Vonnegut CL, Shonkwiler AM, Zakharov LN, Haley MM, Johnson DW. Harnessing solid-state packing for selective detection of chloride in a macrocyclic anionophore. Chem Commun (Camb) 2018; 52:9506-9. [PMID: 27375117 DOI: 10.1039/c6cc03795j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report the synthesis of an inherently fluorescent macrocyclic receptor for chloride. The use of a disulphide tether provides for an excellent yield in the macrocyclization step. This compound binds chloride in the solution and solid state, and while unstable over time in aqueous solution, shows a selective response toward chloride over other anions in the solid state due to intermolecular interactions between fluorophore backbones. Surprisingly, the optoelectronic response to anions differs in solution and the films, with a distinct colorimetric response observed only in the film.
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Affiliation(s)
- Chris L Vonnegut
- Department of Chemistry & Biochemistry and Materials Science Institute, University of Oregon, Eugene, OR 97403-1253, USA.
| | - Airlia M Shonkwiler
- Department of Chemistry & Biochemistry and Materials Science Institute, University of Oregon, Eugene, OR 97403-1253, USA.
| | - Lev N Zakharov
- CAMCOR, University of Oregon, 1443 East 13th Ave., Eugene, Oregon 97403, USA
| | - Michael M Haley
- Department of Chemistry & Biochemistry and Materials Science Institute, University of Oregon, Eugene, OR 97403-1253, USA.
| | - Darren W Johnson
- Department of Chemistry & Biochemistry and Materials Science Institute, University of Oregon, Eugene, OR 97403-1253, USA.
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33
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Jarvis TS, Collins CG, Dempsey JM, Oliver AG, Smith BD. Synthesis and Structure of 3,3-Dimethylindoline Squaraine Rotaxanes. J Org Chem 2017; 82:5819-5825. [DOI: 10.1021/acs.joc.7b00655] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Tia S. Jarvis
- Department of Chemistry and
Biochemistry, University of Notre Dame, 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Carleton G. Collins
- Department of Chemistry and
Biochemistry, University of Notre Dame, 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Janel M. Dempsey
- Department of Chemistry and
Biochemistry, University of Notre Dame, 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Allen G. Oliver
- Department of Chemistry and
Biochemistry, University of Notre Dame, 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Bradley D. Smith
- Department of Chemistry and
Biochemistry, University of Notre Dame, 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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34
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Leigh DA, Marcos V, Nalbantoglu T, Vitorica-Yrezabal IJ, Yasar FT, Zhu X. Pyridyl-Acyl Hydrazone Rotaxanes and Molecular Shuttles. J Am Chem Soc 2017; 139:7104-7109. [PMID: 28471662 DOI: 10.1021/jacs.7b03307] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report on rotaxanes featuring a pyridyl-acyl hydrazone moiety on the axle as a photo/thermal-switchable macrocycle binding site. The pyridyl-acyl E-hydrazone acts as a hydrogen bonding template that directs the assembly of a benzylic amide macrocycle around the axle to form [2]rotaxanes in up to 85% yield; the corresponding Z-hydrazone thread affords no rotaxane under similar conditions. However, the E-rotaxane can be smoothly converted into the Z-rotaxane in 98% yield under UV irradiation. The X-ray crystal structures of the E- and Z-rotaxanes show different intercomponent hydrogen bonding patterns. In molecular shuttles containing pyridyl-acyl hydrazone and succinic amide ester binding sites, the change of position of the macrocycle on the thread can be achieved through a series of light irradiation and heating cycles with excellent positional integrity (>95%) and switching fidelity (98%) in each state.
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Affiliation(s)
- David A Leigh
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Vanesa Marcos
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Tugrul Nalbantoglu
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | | | - F Tuba Yasar
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Xiaokang Zhu
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
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35
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Martinez-Cuezva A, Saura-Sanmartin A, Nicolas-Garcia T, Navarro C, Orenes RA, Alajarin M, Berna J. Photoswitchable interlocked thiodiglycolamide as a cocatalyst of a chalcogeno-Baylis-Hillman reaction. Chem Sci 2017; 8:3775-3780. [PMID: 28580109 PMCID: PMC5436546 DOI: 10.1039/c7sc00724h] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 03/07/2017] [Indexed: 11/24/2022] Open
Abstract
En route to a photoswitchable interlocked catalyst we have proved the ability of thiodiglycolamide to act as a template in the formation of hydrogen-bonded [2]rotaxanes. X-ray diffraction studies reveal the shielding of the sulfide atom by the macrocycle. A series of molecular shuttles are described as having an isomerizable fumaramide and thiodiglycolamide binding sites for controlling the relative ring position at will. By employing these systems as photoregulated catalysts, the TiCl4-mediated chalcogeno-Morita-Baylis-Hillman reaction is tested. In the presence of the maleamide shuttle, in which the sulfide function is encapsulated by the macrocycle, a complete loss in control of the geometry of the produced aldol is observed. The E-aldol adduct is predominantly obtained when the photoisomerized fumaramide shuttle, in which the sulfide function is exposed, is used.
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Affiliation(s)
- 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 .
| | - Adrian Saura-Sanmartin
- Departamento de Química Orgánica , Facultad de Química , Regional Campus of International Excellence "Campus Mare Nostrum" , Universidad de Murcia , E-30100 , Murcia , Spain .
| | - Tomas Nicolas-Garcia
- Departamento de Química Orgánica , Facultad de Química , Regional Campus of International Excellence "Campus Mare Nostrum" , Universidad de Murcia , E-30100 , Murcia , Spain .
| | - Cristian Navarro
- 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 .
| | - 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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36
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Liu W, Gómez-Durán CFA, Smith BD. Fluorescent Neuraminidase Assay Based on Supramolecular Dye Capture After Enzymatic Cleavage. J Am Chem Soc 2017; 139:6390-6395. [PMID: 28426220 DOI: 10.1021/jacs.7b01628] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A conceptually new type of enzymatic cleavage assay is reported that utilizes in situ supramolecular capture of the fluorescent product. A squaraine-derived substrate with large blocking groups at each end of its structure cannot be threaded by a tetralactam macrocycle until the blocking groups are removed by enzyme cleavage. A prototype design responds to viral neuraminidase, an indicator of influenza infection, and also measures susceptibility of the sample to neuraminidase inhibitor drugs. The substrate structure incorporates three key features: (a) a bis(4-amino-3-hydroxyphenyl)squaraine core with bright deep-red fluorescence and excellent photostability, (b) an N-methyl group at each end of the squaraine core that ensures fast macrocycle threading kinetics, and (c) sialic acid blocking groups that prevent macrocycle threading until they are removed by viral neuraminidase. The enzyme assay can be conducted in aqueous solution where dramatic colorimetric and fluorescence changes are easily observed by the naked eye. Alternatively, affinity capture beads coated with macrocycle can be used to immobilize the liberated squaraine and enable a range of heterogeneous analysis options. With further optimization, this new type of neuraminidase assay may be useful in a point of care clinic to rapidly diagnose influenza infection and also determine which of the approved antiviral inhibitor drugs is likely to be the most effective treatment for an individual patient. The assay design is generalizable and can be readily modified to monitor virtually any type of enzyme-catalyzed cleavage reaction.
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Affiliation(s)
- Wenqi Liu
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - César F A Gómez-Durán
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Bradley D Smith
- Department of Chemistry and Biochemistry, University of Notre Dame , 236 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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37
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Satake A, Ishizawa Y, Katagiri H, Kondo SI. Chloride Selective Macrocyclic Bisurea Derivatives with 2,2′-Binaphthalene Moieties as Spacers. J Org Chem 2016; 81:9848-9857. [DOI: 10.1021/acs.joc.6b01959] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Akira Satake
- Department
of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata-shi, Yamagata 990-8560, Japan
| | - Yuki Ishizawa
- Department
of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata-shi, Yamagata 990-8560, Japan
| | - Hiroshi Katagiri
- Graduate
School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Shin-ichi Kondo
- Department
of Material and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata-shi, Yamagata 990-8560, Japan
- Institute
for Regional Innovation, Yamagata University, Kanakame, Kaminoyama, Yamagata 999-3101, Japan
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38
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39
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Zhang Q, Qu DH. Artificial Molecular Machine Immobilized Surfaces: A New Platform To Construct Functional Materials. Chemphyschem 2016; 17:1759-68. [DOI: 10.1002/cphc.201501048] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Qi Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; 130 Meilong Road Shanghai China
| | - Da-Hui Qu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; 130 Meilong Road Shanghai China
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40
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Cheng M, Liu L, Cao Y, Jiang J, Wang L. A Phosphine Oxide Functional Group Based [2]Rotaxane That Operates as a Multistable Molecular Shuttle. Chemphyschem 2016; 17:1835-9. [DOI: 10.1002/cphc.201501016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Ming Cheng
- Key Laboratory of Mesoscopic Chemistry of MOE; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 China
| | - Li Liu
- Key Laboratory of Mesoscopic Chemistry of MOE; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 China
| | - Yihan Cao
- Key Laboratory of Mesoscopic Chemistry of MOE; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 China
| | - Juli Jiang
- Key Laboratory of Mesoscopic Chemistry of MOE; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 China
| | - Leyong Wang
- Key Laboratory of Mesoscopic Chemistry of MOE; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 China
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41
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Langton MJ, Marques I, Robinson SW, Félix V, Beer PD. Iodide Recognition and Sensing in Water by a Halogen-Bonding Ruthenium(II)-Based Rotaxane. Chemistry 2016; 22:185-92. [PMID: 26626866 PMCID: PMC4832824 DOI: 10.1002/chem.201504018] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Indexed: 11/11/2022]
Abstract
The synthesis and anion-recognition properties of the first halogen-bonding rotaxane host to sense anions in water is described. The rotaxane features a halogen-bonding axle component, which is stoppered with water-solubilizing permethylated β-cyclodextrin motifs, and a luminescent tris(bipyridine)ruthenium(II)-based macrocycle component. (1) H NMR anion-binding titrations in D2 O reveal the halogen-bonding rotaxane to bind iodide with high affinity and with selectively over the smaller halide anions and sulfate. The binding affinity trend was explained through molecular dynamics simulations and free-energy calculations. Photo-physical investigations demonstrate the ability of the interlocked halogen-bonding host to sense iodide in water, through enhancement of the macrocycle component's Ru(II) metal-ligand charge transfer (MLCT) emission.
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Affiliation(s)
- Matthew J Langton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA (UK)
| | - Igor Marques
- Departamento de Química, iBiMED and CICECO, Universidade de Aveiro, 3810-193 Aveiro (Portugal)
| | - Sean W Robinson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA (UK)
| | - Vítor Félix
- Departamento de Química, iBiMED and CICECO, Universidade de Aveiro, 3810-193 Aveiro (Portugal)
| | - Paul D Beer
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford OX1 3TA (UK).
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42
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Kaur H, Singh J, Chopra S, Kaur N. Calix[4]arene based dipodal receptor nanohybrids for selective determination of chloride ions in aqueous media. Talanta 2016; 146:122-9. [DOI: 10.1016/j.talanta.2015.08.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 08/07/2015] [Accepted: 08/11/2015] [Indexed: 01/25/2023]
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43
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Liu ZX, Sun Y, Feng Y, Chen H, He YM, Fan QH. Halogen-bonding for visual chloride ion sensing: a case study using supramolecular poly(aryl ether) dendritic organogel systems. Chem Commun (Camb) 2016; 52:2269-72. [DOI: 10.1039/c5cc09082b] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient and straightforward method for the visual recognition of chloride ion has been established through a chloride-responsive dendritic organogel.
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Affiliation(s)
- Zhi-Xiong Liu
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition
- Institute of Chemistry
- Chinese Academy of Sciences (CAS)
- Beijing 100190
| | - Yihua Sun
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Yu Feng
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition
- Institute of Chemistry
- Chinese Academy of Sciences (CAS)
- Beijing 100190
| | - Hui Chen
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Yan-Mei He
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition
- Institute of Chemistry
- Chinese Academy of Sciences (CAS)
- Beijing 100190
| | - Qing-Hua Fan
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition
- Institute of Chemistry
- Chinese Academy of Sciences (CAS)
- Beijing 100190
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44
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Langton MJ, Xiong Y, Beer PD. Active-Metal Template Synthesis of a Halogen-Bonding Rotaxane for Anion Recognition. Chemistry 2015; 21:18910-4. [PMID: 26500150 PMCID: PMC4736451 DOI: 10.1002/chem.201504236] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Indexed: 11/25/2022]
Abstract
The synthesis of an all-halogen-bonding rotaxane for anion recognition is achieved by using active-metal templation. A flexible bis-iodotriazole-containing macrocycle is exploited for the metal-directed rotaxane synthesis. Endotopic binding of a Cu(I) template facilitates an active-metal CuAAC iodotriazole axle formation reaction that captures the interlocked rotaxane product. Following copper-template removal, exotopic coordination of a more sterically demanding rhenium(I) complex induces an inversion in the conformation of the macrocycle component, directing the iodotriazole halogen-bond donors into the rotaxane's interlocked binding cavity to facilitate anion recognition.
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Affiliation(s)
- Matthew J Langton
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Yaoyao Xiong
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK)
| | - Paul D Beer
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA (UK).
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45
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Arumugaperumal R, Srinivasadesikan V, Ramakrishnam Raju MV, Lin MC, Shukla T, Singh R, Lin HC. Acid/Base and H2PO4(-) Controllable High-Contrast Optical Molecular Switches with a Novel BODIPY Functionalized [2]Rotaxane. ACS APPLIED MATERIALS & INTERFACES 2015; 7:26491-26503. [PMID: 26548660 DOI: 10.1021/acsami.5b07574] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel multifunctional mechanically interlocked switchable [2]rotaxane R4 containing two molecular stations and rotaxane arms terminated with boron-dipyrromethene (BODIPY) fluorophores and its derivatives were synthesized for the first time by CuAAC click reaction. The shuttling motion of macrocycle between the dibenzylammonium and triazolium recognition sites and the distance dependent photoinduced electron transfer process of R4 is demonstrated by utilizing external chemical stimuli (acid/base). Interestingly, the reversible self-assembly process of R4 was recognized by the acid-base molecular switch strategy. Notably, two symmetrical triazolium groups acted as molecular stations, H2PO4(-) receptors, and H-bonded donors. Both [2]rotaxane R4 and thread R2 demonstrated excellent optical responses and high selectivity toward H2PO4(-) ion. The specific motion and guest-host interactions of mechanically interlocked machines (MIMs) were also further explored by quantum mechanical calculations. The thread R2 also demonstrated to enable the detection of H2PO4(-) in RAW 264.7 cells successfully.
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Affiliation(s)
- Reguram Arumugaperumal
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Venkatesan Srinivasadesikan
- Center for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University , Hsinchu 300, Taiwan
| | | | - Ming-Chang Lin
- Center for Interdisciplinary Molecular Science, Department of Applied Chemistry, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Tarun Shukla
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Ravinder Singh
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
| | - Hong-Cheu Lin
- Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 300, Taiwan
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46
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Yang YD, Fan CC, Rambo BM, Gong HY, Xu LJ, Xiang JF, Sessler JL. Multicomponent Self-Assembled Metal–Organic [3]Rotaxanes. J Am Chem Soc 2015; 137:12966-76. [DOI: 10.1021/jacs.5b07308] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu-Dong Yang
- College
of Chemistry, Beijing Normal University, Xinjiekouwaidajie 19, Beijing 100875, P. R. China
| | - Chuan-Cai Fan
- Department
of Chemistry, Renmin University of China, Zhongguanchundajie 59, Beijing 100872, P. R. China
| | - Brett M. Rambo
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224, United States
| | - Han-Yuan Gong
- College
of Chemistry, Beijing Normal University, Xinjiekouwaidajie 19, Beijing 100875, P. R. China
| | - Li-Jin Xu
- Department
of Chemistry, Renmin University of China, Zhongguanchundajie 59, Beijing 100872, P. R. China
| | - Jun-Feng Xiang
- Institute
of Chemistry, Chinese Academy of Sciences, Zhongguanchunbeiyijie 2, Beijing 100190, P. R. China
| | - Jonathan L. Sessler
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224, United States
- Department
of Chemistry, Shanghai University, Shanghai 200444, China
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47
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Affiliation(s)
- Sundus Erbas-Cakmak
- 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
| | - Charlie T. McTernan
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alina
L. Nussbaumer
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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48
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Devadas MS, Devkota T, Guha S, Shaw SK, Smith BD, Hartland GV. Spatial modulation spectroscopy for imaging and quantitative analysis of single dye-doped organic nanoparticles inside cells. NANOSCALE 2015; 7:9779-9785. [PMID: 25964049 PMCID: PMC4465101 DOI: 10.1039/c5nr01614b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Imaging of non-fluorescent nanoparticles in complex biological environments, such as the cell cytosol, is a challenging problem. For metal nanoparticles, Rayleigh scattering methods can be used, but for organic nanoparticles, such as dye-doped polymer beads or lipid nanoparticles, light scattering does not provide good contrast. In this paper, spatial modulation spectroscopy (SMS) is used to image single organic nanoparticles doped with non-fluorescent, near-IR croconaine dye. SMS is a quantitative imaging technique that yields the absolute extinction cross-section of the nanoparticles, which can be used to determine the number of dye molecules per particle. SMS images were recorded for particles within EMT-6 breast cancer cells. The measurements allowed mapping of the nanoparticle location and the amount of dye in a single cell. The results demonstrate how SMS can facilitate efforts to optimize dye-doped nanoparticles for effective photothermal therapy of cancer.
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Affiliation(s)
- Mary Sajini Devadas
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556-5670, USA.
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49
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Busschaert N, Caltagirone C, Van Rossom W, Gale PA. Applications of Supramolecular Anion Recognition. Chem Rev 2015; 115:8038-155. [PMID: 25996028 DOI: 10.1021/acs.chemrev.5b00099] [Citation(s) in RCA: 858] [Impact Index Per Article: 95.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Claudia Caltagirone
- ‡Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Wim Van Rossom
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Philip A Gale
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
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50
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Shigeno M, Kushida Y, Yamaguchi M. Energy Aspects of Thermal Molecular Switching: Molecular Thermal Hysteresis of Helicene Oligomers. Chemphyschem 2015; 16:2076-83. [PMID: 25990788 DOI: 10.1002/cphc.201500210] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 04/13/2015] [Indexed: 12/18/2022]
Abstract
Molecular switching is a phenomenon by which a molecule reversibly changes its structure and state in response to external stimuli or energy. Herein, molecular switching is discussed from thermodynamic and kinetic aspects in terms of energy supply with an emphasis on the thermal switching exhibited by helicene oligomers. It includes the inversion of relative thermodynamic stability induced by temperature changes and molecular thermal hysteresis in a closed system. The thermal phenomenon associated with the oligomers involves population/concentration changes between metastable states under nonequilibrium thermodynamic control.
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Affiliation(s)
- Masanori Shigeno
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai 980-8578 (Japan), Fax: (+81) 22-795-6811
| | - Yo Kushida
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai 980-8578 (Japan), Fax: (+81) 22-795-6811
| | - Masahiko Yamaguchi
- Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Sendai 980-8578 (Japan), Fax: (+81) 22-795-6811.
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