51
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Wilner SE, Xiao Q, Graber ZT, Sherman SE, Percec V, Baumgart T. Dendrimersomes Exhibit Lamellar-to-Sponge Phase Transitions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5527-5534. [PMID: 29660277 PMCID: PMC6010174 DOI: 10.1021/acs.langmuir.8b00275] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Lamellar to nonlamellar membrane shape transitions play essential roles in key cellular processes, such as membrane fusion and fission, and occur in response to external stimuli, including drug treatment and heat. A subset of these transitions can be modeled by means of thermally inducible amphiphile assemblies. We previously reported on mixtures of hydrogenated, fluorinated, and hybrid Janus dendrimers (JDs) that self-assemble into complex dendrimersomes (DMSs), including dumbbells, and serve as promising models for understanding the complexity of biological membranes. Here we show, by means of a variety of complementary techniques, that DMSs formed by single JDs or by mixtures of JDs undergo a thermally induced lamellar-to-sponge transition. Consistent with the formation of a three-dimensional bilayer network, we show that DMSs become more permeable to water-soluble fluorophores after transitioning to the sponge phase. These DMSs may be useful not only in modeling isotropic membrane rearrangements of biological systems but also in drug delivery since nonlamellar delivery vehicles can promote endosomal disruption and cargo release.
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Affiliation(s)
- Samantha E. Wilner
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Qi Xiao
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Zachary T. Graber
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Samuel E. Sherman
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Virgil Percec
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
| | - Tobias Baumgart
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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52
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Kwon K, Park K, Jung HT. Long-range single domain array of a 5 nm pattern of supramolecules via solvent annealing in a double-sandwich cell. NANOSCALE 2018; 10:8459-8470. [PMID: 29691547 DOI: 10.1039/c8nr01291a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In nanotechnology and microelectronics research, the generation of an ultradense, single-grain nanostructure with a long-range lateral order is challenging. In this paper, we report upon a new solvent-annealing method using a double-sandwich confinement to promote the formation of a large-area, single-domain array (>0.3 × 0.3 mm2) of supramolecular cylinders with a small feature size (4.7 nm). The in situ GISAXS experiment result shows the ordering process during solvent evaporation. The diffusion of the solvent molecules led to the disassembly of the supramolecules confined between the top and bottom surfaces and their subsequent mobilization, thereby producing a highly ordered hexagonal array of supramolecular materials under the double-sandwich confinement upon solvent evaporation. In addition, two key factors were found to be crucial in this process for generating highly-ordered supramolecular building blocks: (i) the presence of a top coat during solvent evaporation to provide a geometric confinement template, and (ii) the control of the solvent evaporation rate during the solvent evaporation step to provide the dendrimer sufficient time to self-assemble into the highly ordered state over a large area. Our developed approach, which can be extended to be used for a large family of supramolecules, is of critical importance in providing a new bottom-up lithographic method based on supramolecular self-assembly.
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Affiliation(s)
- Kiok Kwon
- Department of Chemical & Biomolecular Engineering (BK-21 plus) and KAIST Institute for Nanocentury, KAIST, Daejeon 34141, Korea.
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53
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McMahon MT, Bulte JWM. Two decades of dendrimers as versatile MRI agents: a tale with and without metals. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1496. [PMID: 28895298 PMCID: PMC5989322 DOI: 10.1002/wnan.1496] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/25/2017] [Accepted: 08/02/2017] [Indexed: 12/24/2022]
Abstract
Dendrimers or dendritic polymers are a class of compounds with great potential for nanomedical use. Some of their properties, including their rigidity, low polydispersity and the ease with which their surfaces can be modified make them particularly well suited for use as MRI diagnostic or theranostic agents. For the past 20 years, researchers have recognized this potential and refined dendrimer formulations to optimize these nanocarriers for a host of MRI applications, including blood pool imaging agents, lymph node imaging agents, tumor-targeted theranostic agents and cell tracking agents. This review summarizes the various types of dendrimers according to the type of MR contrast they can provide. This includes the metallic T1 , T2 and paraCEST imaging agents, and the non-metallic diaCEST and fluorinated (19 F) heteronuclear imaging agents. This article is categorized under: Diagnostic Tools > In Vivo Nanodiagnostics and Imaging Implantable Materials and Surgical Technologies > Nanomaterials and Implants.
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Affiliation(s)
- Michael T. McMahon
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F. M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Jeff W. M. Bulte
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F. M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
- Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Chemical & Biomolecular Engineering, The Johns Hopkins University Whiting School of Engineering, Baltimore, MD, USA
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54
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The fluorination effect of fluoroamphiphiles in cytosolic protein delivery. Nat Commun 2018; 9:1377. [PMID: 29636457 PMCID: PMC5893556 DOI: 10.1038/s41467-018-03779-8] [Citation(s) in RCA: 199] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 03/08/2018] [Indexed: 11/18/2022] Open
Abstract
Direct delivery of proteins into cells avoids many drawbacks of gene delivery, and thus has emerging applications in biotherapy. However, it remains a challenging task owing to limited charges and relatively large size of proteins. Here, we report an efficient protein delivery system via the co-assembly of fluoroamphiphiles and proteins into nanoparticles. Fluorous substituents on the amphiphiles play essential roles in the formation of uniform nanoparticles, avoiding protein denaturation, efficient endocytosis, and maintaining low cytotoxicity. Structure-activity relationship studies reveal that longer fluorous chain length and higher fluorination degree contribute to more efficient protein delivery, but excess fluorophilicity on the polymer leads to the pre-assembly of fluoroamphiphiles into stable vesicles, and thus failed protein encapsulation and cytosolic delivery. This study highlights the advantage of fluoroamphiphiles over other existing strategies for intracellular protein delivery. Proteins can serve as means of medical treatment, but their efficient delivery to cells is difficult. Here, the authors present a type of polymers, fluoroamphiphiles, acting as chemical chaperones that can facilitate the import of proteins into the inner compartment, i.e. cytosol, of cells.
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55
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Exploring functional pairing between surface glycoconjugates and human galectins using programmable glycodendrimersomes. Proc Natl Acad Sci U S A 2018; 115:E2509-E2518. [PMID: 29382751 PMCID: PMC5856548 DOI: 10.1073/pnas.1720055115] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Cells are decorated with charged and uncharged carbohydrate ligands known as glycans, which are responsible for several key functions, including their interactions with proteins known as lectins. Here, a platform consisting of synthetic nanoscale vesicles, known as glycodendrimersomes, which can be programmed with cell surface-like structural and topological complexity, is employed to dissect design aspects of glycan presentation, with specificity for lectin-mediated bridging. Aggregation assays reveal the extent of cross-linking of these biomimetic nanoscale vesicles—presenting both anionic and neutral ligands in a bioactive manner—with disease-related human and other galectins, thus offering the possibility of unraveling the nature of these fundamental interactions. Precise translation of glycan-encoded information into cellular activity depends critically on highly specific functional pairing between glycans and their human lectin counter receptors. Sulfoglycolipids, such as sulfatides, are important glycolipid components of the biological membranes found in the nervous and immune systems. The optimal molecular and spatial design aspects of sulfated and nonsulfated glycans with high specificity for lectin-mediated bridging are unknown. To elucidate how different molecular and spatial aspects combine to ensure the high specificity of lectin-mediated bridging, a bottom-up toolbox is devised. To this end, negatively surface-charged glycodendrimersomes (GDSs), of different nanoscale dimensions, containing sulfo-lactose groups are self-assembled in buffer from a synthetic sulfatide mimic: Janus glycodendrimer (JGD) containing a 3′-O-sulfo-lactose headgroup. Also prepared for comparative analysis are GDSs with nonsulfated lactose, a common epitope of human membranes. These self-assembled GDSs are employed in aggregation assays with 15 galectins, comprising disease-related human galectins, and other natural and engineered variants from four families, having homodimeric, heterodimeric, and chimera architectures. There are pronounced differences in aggregation capacity between human homodimeric and heterodimeric galectins, and also with respect to their responsiveness to the charge of carbohydrate-derived ligand. Assays reveal strong differential impact of ligand surface charge and density, as well as lectin concentration and structure, on the extent of surface cross-linking. These findings demonstrate how synthetic JGD-headgroup tailoring teamed with protein engineering and network assays can help explain how molecular matchmaking operates in the cellular context of glycan and lectin complexity.
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56
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Yang YL, Sheng YJ, Tsao HK. Branching pattern effect and co-assembly with lipids of amphiphilic Janus dendrimersomes. Phys Chem Chem Phys 2018; 20:27305-27313. [DOI: 10.1039/c8cp05268a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The influence of the branching patterns on the membrane properties of Janus dendrimers in water has been investigated by dissipative particle dynamics simulations.
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Affiliation(s)
- Yan-Ling Yang
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Yu-Jane Sheng
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Heng-Kwong Tsao
- Department of Chemical and Materials Engineering
- National Central University
- Jhongli 320
- Taiwan
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57
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Morgado P, Garcia AR, Martins LFG, Ilharco LM, Filipe EJM. Alkane Coiling in Perfluoroalkane Solutions: A New Primitive Solvophobic Effect. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:11429-11435. [PMID: 28922605 DOI: 10.1021/acs.langmuir.7b02516] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we demonstrate that n-alkanes coil when mixed with perfluoroalkanes, changing their conformational equilibria to more globular states, with a higher number of gauche conformations. The new coiling effect is here observed in fluids governed exclusively by dispersion interactions, contrary to other examples in which hydrogen bonding and polarity play important roles. FTIR spectra of liquid mixtures of n-hexane and perfluorohexane unambiguously reveal that the population of n-hexane molecules in all-trans conformation reduces from 32% in the pure n-alkane to practically zero. The spectra of perfluorohexane remain unchanged, suggesting nanosegregation of the hydrogenated and fluorinated chains. Molecular dynamics simulations support this analysis. The new solvophobic effect is prone to have a major impact on the structure, organization, and therefore thermodynamic properties and phase equilibria of fluids involving mixed hydrogenated and fluorinated chains.
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Affiliation(s)
| | - Ana Rosa Garcia
- Departamento de Química e Farmácia, FCT, Universidade do Algarve , 8000 Faro, Portugal
| | - Luís F G Martins
- Centro de Química de Évora, Escola de Ciências e Tecnologia, Universidade de Évora , 7000-671 Évora, Portugal
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58
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Şologan M, Boccalon M, Bidoggia S, Gentilini C, Pasquato L, Pengo P. Self-sorting in mixed fluorinated/hydrogenated assemblies. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1386307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maria Şologan
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Mariangela Boccalon
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Silvia Bidoggia
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Cristina Gentilini
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Lucia Pasquato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
| | - Paolo Pengo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy
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59
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Janus dendrimersomes coassembled from fluorinated, hydrogenated, and hybrid Janus dendrimers as models for cell fusion and fission. Proc Natl Acad Sci U S A 2017; 114:E7045-E7053. [PMID: 28784782 DOI: 10.1073/pnas.1708380114] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A three-component system of Janus dendrimers (JDs) including hydrogenated, fluorinated, and hybrid hydrogenated-fluorinated JDs are reported to coassemble by film hydration at specific ratios into an unprecedented class of supramolecular Janus particles (JPs) denoted Janus dendrimersomes (JDSs). They consist of a dumbbell-shaped structure composed of an onion-like hydrogenated vesicle and an onion-like fluorinated vesicle tethered together. The synthesis of dye-tagged analogs of each JD component enabled characterization of JDS architectures with confocal fluorescence microscopy. Additionally, a simple injection method was used to prepare submicron JDSs, which were imaged with cryogenic transmission electron microscopy (cryo-TEM). As reported previously, different ratios of the same three-component system yielded a variety of structures including homogenous onion-like vesicles, core-shell structures, and completely self-sorted hydrogenated and fluorinated vesicles. Taken together with the JDSs reported herein, a self-sorting pathway is revealed as a function of the relative concentration of the hybrid JD, which may serve to stabilize the interface between hydrogenated and fluorinated bilayers. The fission-like pathway suggests the possibility of fusion and fission processes in biological systems that do not require the assistance of proteins but instead may result from alterations in the ratios of membrane composition.
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60
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Taabache S, Bertin A. Vesicles from Amphiphilic Dumbbells and Janus Dendrimers: Bioinspired Self-Assembled Structures for Biomedical Applications. Polymers (Basel) 2017; 9:E280. [PMID: 30970958 PMCID: PMC6432481 DOI: 10.3390/polym9070280] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 07/02/2017] [Accepted: 07/06/2017] [Indexed: 12/18/2022] Open
Abstract
The current review focuses on vesicles obtained from the self-assembly of two types of dendritic macromolecules, namely amphiphilic Janus dendrimers (forming dendrimersomes) and amphiphilic dumbbells. In the first part, we will present some synthetic strategies and the various building blocks that can be used to obtain dendritic-based macromolecules, thereby showing their structural versatility. We put our focus on amphiphilic Janus dendrimers and amphiphilic dumbbells that form vesicles in water but we also encompass vesicles formed thereof in organic solvents. The second part of this review deals with the production methods of these vesicles at the nanoscale but also at the microscale. Furthermore, the influence of various parameters (intrinsic to the amphiphilic JD and extrinsic-from the environment) on the type of vesicle formed will be discussed. In the third part, we will review the numerous biomedical applications of these vesicles of nano- or micron-size.
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Affiliation(s)
- Soraya Taabache
- Federal Institute for Materials Research and Testing (BAM), Department 6.0, D-12205 Berlin, Germany.
- Fraunhofer ICT-IMM, D-55129 Mainz, Germany.
| | - Annabelle Bertin
- Federal Institute for Materials Research and Testing (BAM), Department 6.0, D-12205 Berlin, Germany.
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, D-14195 Berlin, Germany.
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61
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Silvestri AP, Dawson PE. Base-catalyzed diastereoselective trimerization of trifluoroacetone. Org Biomol Chem 2017; 15:5131-5134. [PMID: 28594047 PMCID: PMC5584686 DOI: 10.1039/c7ob01094j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amphiphilic fluorocarbons have unique properties that facilitate their self assembly and adhesion to both inorganic and biological substrates. Incorporation of these moieties into valuable constructs typically require complex synthetic routes that have limited their use. Here, the base-catalyzed diastereoselective synthesis of 6-methyl-2,4,6-tris(trifluoromethyl)tetrahydro-2H-pyran-2,4-diol is reported. Trimerization of trifluoroacetone in the presence of 5 mol% KHMDS delivers one of four diastereomers selectively in 81% yield with no column chromatography. Temperature screening revealed the reversibility of this trimerization and the funneling of material into the most thermodynamically stable oxane. Subsequent functionalization with boronic acids is reported.
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Affiliation(s)
- Anthony P Silvestri
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
| | - Philip E Dawson
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
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62
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Kaufman EA, Tarallo R, Elacqua E, Carberry TP, Weck M. Synthesis of Well-Defined Bifunctional Newkome-Type Dendrimers. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Elizabeth A. Kaufman
- Department of Chemistry and
Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Rossella Tarallo
- Department of Chemistry and
Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Elizabeth Elacqua
- Department of Chemistry and
Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Tom P. Carberry
- Department of Chemistry and
Molecular Design Institute, New York University, New York, New York 10003, United States
| | - Marcus Weck
- Department of Chemistry and
Molecular Design Institute, New York University, New York, New York 10003, United States
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63
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Fabrication of Low-Generation Dendrimers into Nanostructures for Efficient and Nontoxic Gene Delivery. Top Curr Chem (Cham) 2017; 375:62. [DOI: 10.1007/s41061-017-0151-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/18/2017] [Indexed: 01/12/2023]
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64
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Sherman SE, Xiao Q, Percec V. Mimicking Complex Biological Membranes and Their Programmable Glycan Ligands with Dendrimersomes and Glycodendrimersomes. Chem Rev 2017; 117:6538-6631. [PMID: 28417638 DOI: 10.1021/acs.chemrev.7b00097] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Synthetic vesicles have been assembled and coassembled from phospholipids, their modified versions, and other single amphiphiles into liposomes, and from block copolymers into polymersomes. Their time-consuming synthesis and preparation as stable, monodisperse, and biocompatible liposomes and polymersomes called for the elaboration of new synthetic methodologies. Amphiphilic Janus dendrimers (JDs) and glycodendrimers (JGDs) represent the most recent self-assembling amphiphiles capable of forming monodisperse, stable, and multifunctional unilamellar and multilamellar onion-like vesicles denoted dendrimersomes (DSs) and glycodendrimersomes (GDSs), dendrimercubosomes (DCs), glycodendrimercubosomes (GDCs), and other complex architectures. Amphiphilic JDs consist of hydrophobic dendrons connected to hydrophilic dendrons and can be thought of as monodisperse oligomers of a single amphiphile. They can be functionalized with a variety of molecules such as dyes, and, in the case of JGDs, with carbohydrates. Their iterative modular synthesis provides efficient access to sequence control at the molecular level, resulting in topologies with specific epitope sequence and density. DSs, GDSs, and other architectures from JDs and JGDs serve as powerful tools for mimicking biological membranes and for biomedical applications such as targeted drug and gene delivery and theranostics. This Review covers all aspects of the synthesis of JDs and JGDs and their biological activity and applications after assembly in aqueous media.
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Affiliation(s)
- Samuel E Sherman
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Qi Xiao
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104-6323, United States
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65
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Wei W, Wu Z, Huang M, Hsu CH, Liu Y, Zhang X, Xiong H. Discovery of hierarchical superstructures in block copolymers by integrating different liquid crystalline interactions. SOFT MATTER 2017; 13:2583-2589. [PMID: 28294274 DOI: 10.1039/c7sm00349h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Hierarchically assembled superstructures of block copolymers are discovered by introduction of the competition of anisotropy attributed from liquid crystalline ordering and nano-phase separation. When the two prototypical fields of liquid crystals (LCs), smectics (S) and nematics (N), are adjoined within the framework of diblock copolymers (S-N) in a variety of precisely tuned compositions, a novel class of superlattices with an interdigitated array of smectic layers between the nearest lamellae or cylinders are observed. This generates unconventional nano-phase separated orthorhombic (Lo) and pseudo-hexagonal (Ho) structures, where the stretched N tethers, projected regularly from the S layers, could transfer the local organization and guide the correlated assembly. This type of superstructure is highly frustrated in reversed cylindrical morphology and absent in S-coil diblock copolymers. The collective interplay of the S and N interactions with nano-phase separation induces the formation of the final complex yet equilibrium structures, providing unprecedented opportunities towards exquisite structural diversity.
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Affiliation(s)
- Wei Wei
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Zhichao Wu
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Mingjun Huang
- Department of Polymer Science, the University of Akron, Akron, Ohio 44325, USA
| | - Chih-Hao Hsu
- Department of Polymer Science, the University of Akron, Akron, Ohio 44325, USA
| | - Yu Liu
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xinlin Zhang
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Huiming Xiong
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China and Center for Soft Matter and Interdisciplinary Sciences, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
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66
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Han K, Go D, Tigges T, Rahimi K, Kuehne AJC, Walther A. Social Self-Sorting of Colloidal Families in Co-Assembling Microgel Systems. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612196] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kang Han
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Dennis Go
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Thomas Tigges
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Khosrow Rahimi
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Alexander J. C. Kuehne
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Andreas Walther
- Institute for Macromolecular Chemistry; Albert-Ludwigs-University Freiburg; Stefan-Meier Strasse 31 71096 Freiburg Germany
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67
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Han K, Go D, Tigges T, Rahimi K, Kuehne AJC, Walther A. Social Self-Sorting of Colloidal Families in Co-Assembling Microgel Systems. Angew Chem Int Ed Engl 2017; 56:2176-2182. [DOI: 10.1002/anie.201612196] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Kang Han
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Dennis Go
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Thomas Tigges
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Khosrow Rahimi
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Alexander J. C. Kuehne
- DWI-Leibniz-Institute for Interactive Materials; Forckenbeckstrasse 50 52074 Aachen Germany
| | - Andreas Walther
- Institute for Macromolecular Chemistry; Albert-Ludwigs-University Freiburg; Stefan-Meier Strasse 31 71096 Freiburg Germany
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68
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Xu A, Lu Q, Huo Z, Ma J, Geng B, Azhar U, Zhang L, Zhang S. Synthesis of fluorinated nanoparticles via RAFT dispersion polymerization-induced self-assembly using fluorinated macro-RAFT agents in supercritical carbon dioxide. RSC Adv 2017. [DOI: 10.1039/c7ra08202a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Nano-sized fluorinated block copolymer particles are prepared by RAFT dispersion polymerization with polymerization-induced self-assembly proceeding in supercritical carbon dioxide.
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Affiliation(s)
- Anhou Xu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Quanxuan Lu
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Zhiyuan Huo
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Jiachen Ma
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Bing Geng
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Umair Azhar
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Luqing Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
| | - Shuxiang Zhang
- Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials
- School of Chemistry and Chemical Engineering
- Shandong Engineering Research Center for Fluorinated Material
- University of Jinan
- Jinan 250022
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69
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Li N, Tsoi TH, Lo WS, Gu YJ, Wan HY, Wong WT. An efficient approach to synthesize glycerol dendrimers via thiol–yne “click” chemistry and their application in stabilization of gold nanoparticles with X-ray attenuation properties. Polym Chem 2017. [DOI: 10.1039/c7py01436h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report an efficient synthesis of glycerol dendrimers via thiol–yne chemistry for stabilization of AuNPs with X-ray attenuation properties.
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Affiliation(s)
- Na Li
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
| | - Tik-Hung Tsoi
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
| | - Wai-Sum Lo
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
| | - Yan-Juan Gu
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
| | - Hoi-Ying Wan
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
| | - Wing-Tak Wong
- Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- China
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70
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Wu C, Hu C, Liu Y. Hyperbranched polysiloxane with highly constrained rings and the effect of the attached arms on the assembly behavior. Polym Chem 2017. [DOI: 10.1039/c7py01177f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Attachment of incompatible arms to a designed hyperbranched polymer with highly constrained rings and the toroidal assembly.
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Affiliation(s)
- Chunyan Wu
- School of Chemistry and Environment
- Beihang University
- Beijing
- PR China
| | - Chunhua Hu
- The Department of Chemistry
- New York University
- New York
- USA
| | - Yuzhou Liu
- School of Chemistry and Environment
- Beihang University
- Beijing
- PR China
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71
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Xiao Q, Wang Z, Williams D, Leowanawat P, Peterca M, Sherman SE, Zhang S, Hammer DA, Heiney PA, King SR, Markovitz DM, André S, Gabius HJ, Klein ML, Percec V. Why Do Membranes of Some Unhealthy Cells Adopt a Cubic Architecture? ACS CENTRAL SCIENCE 2016; 2:943-953. [PMID: 28058284 PMCID: PMC5200934 DOI: 10.1021/acscentsci.6b00284] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Indexed: 05/09/2023]
Abstract
Nonlamellar lipid arrangements, including cubosomes, appear in unhealthy cells, e.g., when they are subject to stress, starvation, or viral infection. The bioactivity of cubosomes-nanoscale particles exhibiting bicontinuous cubic structures-versus more common vesicles is an unexplored area due to lack of suitable model systems. Here, glycodendrimercubosomes (GDCs)-sugar-presenting cubosomes assembled from Janus glycodendrimers by simple injection into buffer-are proposed as mimics of biological cubic membranes. The bicontinuous cubic GDC architecture has been demonstrated by electron tomography. The stability of these GDCs in buffer enabled studies on lectin-dependent agglutination, revealing significant differences compared with the vesicular glycodendrimersome (GDS) counterpart. In particular, GDCs showed an increased activity toward concanavalin A, as well as an increased sensitivity and selectivity toward two variants of banana lectins, a wild-type and a genetically modified variant, which is not exhibited by GDSs. These results suggest that cells may adapt under unhealthy conditions by undergoing a transformation from lamellar to cubic membranes as a method of defense.
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Affiliation(s)
- Qi Xiao
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Zhichun Wang
- Department
of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6321, United States
| | - Dewight Williams
- Electron
Microscopy Resource Laboratory, Department of Biochemistry and Biophysics,
Perelman School of Medicine, University
of Pennsylvania, Philadelphia, Pennsylvania 19104-6082, United States
| | - Pawaret Leowanawat
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mihai Peterca
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Samuel E. Sherman
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Shaodong Zhang
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Daniel A. Hammer
- Department
of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6321, United States
- Department
of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6391, United States
| | - Paul A. Heiney
- Department
of Physics and Astronomy, University of
Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Steven R. King
- Division
of Infectious Diseases, Department of Internal Medicine, Program in
Immunology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - David M. Markovitz
- Division
of Infectious Diseases, Department of Internal Medicine, Program in
Immunology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Sabine André
- Institute
of Physiological Chemistry, Faculty of Veterinary Medicine, Ludwig-Maximilians-University, Veterinärstrasse 13, 80539 Munich, Germany
| | - Hans-Joachim Gabius
- Institute
of Physiological Chemistry, Faculty of Veterinary Medicine, Ludwig-Maximilians-University, Veterinärstrasse 13, 80539 Munich, Germany
| | - Michael L. Klein
- Institute
of Computational Molecular Science, Temple
University, Philadelphia, Pennsylvania 19122, United States
| | - Virgil Percec
- Roy
& Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
- E-mail:
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72
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Ho MS, Partridge BE, Sun HJ, Sahoo D, Leowanawat P, Peterca M, Graf R, Spiess HW, Zeng X, Ungar G, Heiney PA, Hsu CS, Percec V. Screening Libraries of Semifluorinated Arylene Bisimides to Discover and Predict Thermodynamically Controlled Helical Crystallization. ACS COMBINATORIAL SCIENCE 2016; 18:723-739. [PMID: 27797481 DOI: 10.1021/acscombsci.6b00143] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Synthesis, structural, and retrostructural analysis of a library containing 16 self-assembling perylene (PBI), 1,6,7,12-tetrachloroperylene (Cl4PBI), naphthalene (NBI), and pyromellitic (PMBI) bisimides functionalized with environmentally friendly AB3 chiral racemic semifluorinated minidendrons at their imide groups via m = 0, 1, 2, and 3 methylene units is reported. These semifluorinated compounds melt at lower temperatures than homologous hydrogenated compounds, permitting screening of all their thermotropic phases via structural analysis to discover thermodynamically controlled helical crystallization from propeller-like, cogwheel, and tilted molecules as well as lamellar-like structures. Thermodynamically controlled helical crystallization was discovered for propeller-like PBI, Cl4PBI and NBI with m = 0. Unexpectedly, assemblies of twisted Cl4PBIs exhibit higher order than those of planar PBIs. PBI with m = 1, 2, and 3 form a thermodynamically controlled columnar hexagonal 2D lattice of tilted helical columns with intracolumnar order. PBI and Cl4PBI with m = 1 crystallize via a recently discovered helical cogwheel mechanism, while NBI and PMBI with m = 1 form tilted helical columns. PBI, NBI and PMBI with m = 2 generate lamellar-like structures. 3D and 2D assemblies of PBI with m = 1, 2, and 3, NBI with m = 1 and PMBI with m = 2 exhibit 3.4 Å π-π stacking. The library approach applied here and in previous work enabled the discovery of six assemblies which self-organize via thermodynamic control into 3D and 2D periodic arrays, and provides molecular principles to predict the supramolecular structure of electronically active components.
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Affiliation(s)
- Ming-Shou Ho
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Benjamin E. Partridge
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Hao-Jan Sun
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Dipankar Sahoo
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Pawaret Leowanawat
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mihai Peterca
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
- Department
of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Robert Graf
- Max-Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Hans W. Spiess
- Max-Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Xiangbing Zeng
- Department
of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
| | - Goran Ungar
- Department
of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
- Department
of Physics, Zhejiang Sci-Tech University, Hangzhou 3110018, China
| | - Paul A. Heiney
- Department
of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Chain-Shu Hsu
- Department
of Applied Chemistry, National Chiao Tung University, 1001 Ta Hsueh
Road, Hsin-Chu 30049, Taiwan
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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