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de Viguerie L, Keller R, Jonas U, Berger R, Clark CG, Klein CO, Geue T, Müllen K, Butt HJ, Vlassopoulos D. Effect of the molecular structure on the hierarchical self-assembly of semifluorinated alkanes at the air/water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8776-8786. [PMID: 21671602 DOI: 10.1021/la201377f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Semifluorinated alkanes (C(n)F(2n+1)C(m)H(2m+1)), short FnHm display local phase separation of mutually incompatible hydrocarbon and fluorocarbon chain moieties, which has been utilized as a structure-forming motif in supramolecular architectures. The packing of semifluorinated alkanes, nominally based on dodecyl subunits, such as perfluoro(dodecyl)dodecane (F12H12) and perfluoro(dodecyl)eicosane (F12H20), as well as a core extended analogue, 1,4-dibromo-2-((perfluoroundecyl)methoxy)-5-(dodecyloxy)benzene) (F11H1-core-H12), was studied at the air/water interface. Langmuir monolayers were investigated by means of neutron reflectivity directly at the air/water interface and scanning force microscopy after transfer to silicon wafers. Narrowly disperse surface micelles formed in all three cases; however, they were found to bear different morphologies with respect to molecular orientation and assembly dimensionality, which gives rise to different hierarchical aggregate topologies. For F12H12, micelles of ca. 30 nm in diameter, composed of several circular or "spherical cap" substructures, were observed and a monolayer model with the fluorocarbon block oriented toward air is proposed. F12H20 molecules formed larger (ca. 50 nm diameter) hexagonally shaped surface micelles that were hexagonally, densely packed, besides more elongated but tightly interlocked wormlike structures. Conversely, F11H1-core-H12 films organized into linear rows of elongated surface micelles with comparable width, but an average length of ca. 400 nm, apparently formed by antiparallel molecular packing.
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Affiliation(s)
- Laurence de Viguerie
- Bio-Organic Materials Chemistry Laboratory, Institute of Electronic Structure & Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, Greece
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302
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Tewes F, Krafft MP, Boury F. Dynamical and rheological properties of fluorinated surfactant films adsorbed at the pressurized CO2-H2O interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8144-8152. [PMID: 21630699 DOI: 10.1021/la201009z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The dynamics of adsorption, interfacial tension, and rheological properties of two phosphocholine-derived partially fluorinated surfactants FnHmPC, designed to compensate for the weak CO(2)-surfactant tail interactions, were determined at the pressurized CO(2)-H(2)O interface. The two surfactants differ only by the length of the hydrocarbon spacer (5 CH(2) in F8H5PC and 11 CH(2) in F8H11PC) located between the terminal perfluoroalkyl chain and the polar head. The length of this spacer was found to have a critical impact on the adsorption kinetics and elasticity of the interfacial surfactant film. F8H5PC is soluble in both water and CO(2) phases and presents several distinct successive interfacial behaviors when bulk water concentration (C(W)) increases and displays a nonclassical isotherm shape. The isotherms of F8H5PC are similar for the three CO(2) pressures investigated and comprise four regimes. In the first regime, at low C(W), the interfacial tension is controlled by the organization that occurs between H(2)O and CO(2). The second regime corresponds to the adsorption of the surfactant as a monolayer until the CO(2) phase is saturated with F8H5PC, resulting in a first inflection point. In this regime, F8H5PC molecules reach maximal compaction and display the highest apparent interfacial elasticity. In the third regime, a second inflection is observed that corresponds to the critical micelle concentration of the surfactant in water. At the highest concentrations (fourth regime), the interfacial films are purely viscous and highly flexible, suggesting the capacity for this surfactant to produce water-in-CO(2) microemulsion. In this regime, surfactant adsorption is very fast and equilibrium is reached in less than 100 s. The behavior of F8H11PC is drastically different: it forms micelles only in the water phase, resulting in a classical Gibbs interface. This surfactant decreases the interfacial tension down to 1 mN/m and forms a strongly elastic interface. As this surfactant forms a very cohesive interface, it should be suitable for formulating stable water-in-CO(2) emulsions. The finding that the length of the hydrocarbon spacer in partially fluorinated surfactants can drastically influence film properties at the CO(2)-H(2)O interface should help control the formation of microemulsions versus emulsions and help elaborate a rationale for the design of surfactants specifically adapted to pressurized CO(2).
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Affiliation(s)
- Frederic Tewes
- School of Pharmacy and Pharmaceutical Sciences, University of Dublin, Trinity College, Dublin 2, Ireland
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303
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Platen T, Schüler T, Tremel W, Hoffmann-Röder A. Synthesis and Antibody Binding of Highly Fluorinated Amphiphilic MUC1 Glycopeptide Antigens. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100648] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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304
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Cametti M, Crousse B, Metrangolo P, Milani R, Resnati G. The fluorous effect in biomolecular applications. Chem Soc Rev 2011; 41:31-42. [PMID: 21691620 DOI: 10.1039/c1cs15084g] [Citation(s) in RCA: 319] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
From being a niche area only a few decades ago, fluorous chemistry has gained momentum and is, nowadays, a fervent area of research. It has brought forth, in fact, numerous applicative innovations that stretch among different fields: from catalysis to separation science, from supramolecular to materials and analytical chemistry. Recently, the unique features of perfluorinated compounds have reached the attention of the biochemists' audience. This tutorial review introduces the basic concepts of fluorous chemistry and illustrates its main biomolecular applications. Special attention has been given to fluorous microarrays and their combination with Mass-Spectroscopy (MS) techniques, to protein properties modification by the introduction of local fluorous domains, and to the most recent applications of (19)F-Magnetic Resonance Imaging ((19)F-MRI).
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Affiliation(s)
- Massimo Cametti
- NFMLab-DCMIC Giulio Natta, Politecnico di Milano, via Mancinelli 7, I-20131 Milan, Italy
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305
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Koda Y, Terashima T, Nomura A, Ouchi M, Sawamoto M. Fluorinated Microgel-Core Star Polymers as Fluorous Compartments for Molecular Recognition. Macromolecules 2011. [DOI: 10.1021/ma201076y] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yuta Koda
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takaya Terashima
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Akihisa Nomura
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Makoto Ouchi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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306
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Badache L, Boschet F, Lehanine Z, Boutevin B, Ameduri B. Synthesis and surface properties of a series of surfactants based on O-alkyl and O-perfluoro-N,N′-diisopropylisoureas. J Fluor Chem 2011. [DOI: 10.1016/j.jfluchem.2011.03.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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307
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Sakakibara K, Hill JP, Ariga K. Thin-film-based nanoarchitectures for soft matter: controlled assemblies into two-dimensional worlds. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:1288-308. [PMID: 21506267 DOI: 10.1002/smll.201002350] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Indexed: 05/19/2023]
Abstract
Controlling the organization of molecular building blocks at the nanometer level is of utmost importance, not only from the viewpoint of scientific curiosity, but also for the development of next-generation organic devices with electrical, optical, chemical, or biological functions. Self-assembly offers great potential for the manufacture of nanoarchitectures (nanostructures and nanopatterns) over large areas by using low-energy and inexpensive spontaneous processes. However, self-assembled structures in 3D media, such as solutions or solids, are not easily incorporated into current device-oriented nanotechnology. The scope of this review is therefore to introduce the expanding methodology for the construction of thin-film-based nanoarchitectures on solid surfaces and to try to address a general concept with emphasis on the availability of dynamic interfaces for the creation and manipulation of nanoarchitectures. In this review, the strategies for the construction of nanostructures, the control and manipulation of nanopatterns, and the application of nanoarchitectures are described; the construction strategies are categorized into three classes: i) π-conjugated molecular assembly in two dimensions, ii) bio-directed molecular assembly on surfaces, and iii) recent thin-film preparation technologies.
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Affiliation(s)
- Keita Sakakibara
- World Premier International Research Center for Materials, Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, Japan.
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308
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Nitoń P, Żywociński A, Paczesny J, Fiałkowski M, Hołyst R, Glettner B, Kieffer R, Tschierske C, Pociecha D, Górecka E. Aggregation and Layering Transitions in Thin Films of X-, T-, and Anchor-Shaped Bolaamphiphiles at the Air-Water Interface. Chemistry 2011; 17:5861-73. [DOI: 10.1002/chem.201003671] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Indexed: 12/19/2022]
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309
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Ranjbar-Karimi R, Mashak-Shoshtari M, Hashemi-Uderji S, Kia R. Synthesis and structural study of bis-perfluoropyridyl bridged by 1,4 and 1,2 dihydropyridine. J Fluor Chem 2011. [DOI: 10.1016/j.jfluchem.2011.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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310
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In vivo imaging of inflammation in the peripheral nervous system by (19)F MRI. Exp Neurol 2011; 229:494-501. [PMID: 21459088 DOI: 10.1016/j.expneurol.2011.03.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 03/17/2011] [Accepted: 03/24/2011] [Indexed: 11/22/2022]
Abstract
Visualization of neuroinflammation is still a major task in neuroscience and neurology since inflammatory processes play a central pathophysiological role in many disorders of the nervous system but are not yet covered by conventional imaging techniques. Recently, (19)F magnetic resonance imaging (MRI) was introduced as a new cellular imaging technology. In the present study, we established (19)F high field MRI for cell tracking in the peripheral nervous system (PNS) of rats using dedicated MR coils. To mimic focal neuroinflammation, lysolecithin was locally injected into the left sciatic nerve inducing demyelination followed by severe infiltration of monocytes/macrophages from the circulation. Systemic administration of perfluorocarbons (PFC) led to a fluorine signal along the proximal stretch of the affected sciatic nerves in in vivo(19)F MRI which was not seen on the right healthy side. The preferential in vivo uptake of PFC by circulating mononuclear cells was confirmed by density gradient centrifugation of the blood. Removal of nerves with consecutive ex vivo(19)F MRI and additional (19)F spectroscopy for quantification corroborated the localization of the (19)F marker within the injured nerves (1.07×10(18)±1.00×10(18) mean detectable fluorine spins) while contralateral naive nerves did not exhibit any detectable fluorine signal. Histological assessment confirmed the presence of numerous ED1-positive macrophages within the nerve lesions. Control experiments showed that intraneural application of saline led to an inflammatory reaction restricted to the perineurium which could also be detected by (19)F MRI. In conclusion, we show that (19)F MRI is a promising new technology to visualize hematogenous macrophage responses in the nervous system.
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311
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Kostov G, Boschet F, Buller J, Badache L, Brandsadter S, Ameduri B. First Amphiphilic Poly(vinylidene fluoride-co-3,3,3-trifluoropropene)-b-oligo(vinyl alcohol) Block Copolymers as Potential Nonpersistent Fluorosurfactants from Radical Polymerization Controlled by Xanthate. Macromolecules 2011. [DOI: 10.1021/ma102679f] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Georgi Kostov
- Institut Charles Gerhardt, Ingénierie et Architectures Macromoléculaires, UMR CNRS 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier, France
| | - Frédéric Boschet
- Institut Charles Gerhardt, Ingénierie et Architectures Macromoléculaires, UMR CNRS 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier, France
| | - Jens Buller
- Institut Charles Gerhardt, Ingénierie et Architectures Macromoléculaires, UMR CNRS 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier, France
| | - Leila Badache
- Institut Charles Gerhardt, Ingénierie et Architectures Macromoléculaires, UMR CNRS 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier, France
- Laboratoire de Synthèse Organique, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediène, B.P. 32, Bab-Ezzouar-Alger, Algeria
| | - Stephan Brandsadter
- Chemtura, 1801 U.S. Highway 52 West, West Lafayette, Indiana 47906-2200, United States
| | - Bruno Ameduri
- Institut Charles Gerhardt, Ingénierie et Architectures Macromoléculaires, UMR CNRS 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue de l'Ecole Normale, 34296 Montpellier, France
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312
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Holm R, Jørgensen EB, Harborg M, Larsen R, Holm P, Müllertz A, Jacobsen J. A novel excipient, 1-perfluorohexyloctane shows limited utility for the oral delivery of poorly water-soluble drugs. Eur J Pharm Sci 2011; 42:416-22. [DOI: 10.1016/j.ejps.2011.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Revised: 01/13/2011] [Accepted: 01/17/2011] [Indexed: 01/21/2023]
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313
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Reuter S, Hofmann AM, Busse K, Frey H, Kressler J. Langmuir and Langmuir-Blodgett films of multifunctional, amphiphilic polyethers with cholesterol moieties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:1978-1989. [PMID: 21175221 DOI: 10.1021/la104274d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Langmuir films of multifunctional, hydrophilic polyethers containing a hydrophobic cholesterol group (Ch) were studied by surface pressure-mean molecular area (π-mmA) measurements and Brewster angle microscopy (BAM). The polyethers were either homopolymers or diblock copolymers of linear poly(glycerol) (lPG), linear poly(glyceryl glycidyl ether) (lPGG), linear poly(ethylene glycol) (lPEG), or hyperbranched poly(glycerol) (hbPG). Surface pressure measurements revealed that the homopolymers lPG and hbPG did not stay at the water surface after spreading and solvent evaporation, in contrast to lPEG. Because of the incorporation of the Ch group in the polymer structure, stable Langmuir films were formed by Ch-lPG(n), Ch-lPGG(n), and Ch-hbPG(n). The Ch-hbPG(n), Ch-lPEG(n), Ch-lPEG(n)-b-lPG(m), Ch-lPEG(n)-b-lPGG(m), and Ch-lPEG(n)-b-hbPG(m) systems showed an extended plateau region assigned to a phase transition involving the Ch groups. Typical hierarchically ordered morphologies of the LB films on hydrophilic substrates were observed for all Ch-initiated polymers. All LB films showed that Ch of the Ch-initiated homopolymers is able to crystallize. This strong tendency of self-aggregation then triggers further dewetting effects of the respective polyether entities. Fingerlike morphologies are observed for Ch-lPEG(69), since the lPEG(69) entity is able to undergo crystallization after transfer onto the silicon substrate.
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Affiliation(s)
- Sascha Reuter
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
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314
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Flögel U, Su S, Kreideweiss I, Ding Z, Galbarz L, Fu J, Jacoby C, Witzke O, Schrader J. Noninvasive detection of graft rejection by in vivo (19) F MRI in the early stage. Am J Transplant 2011; 11:235-44. [PMID: 21214858 DOI: 10.1111/j.1600-6143.2010.03372.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Diagnosis of transplant rejection requires tissue biopsy and entails risks. Here, we describe a new (19) F MRI approach for noninvasive visualization of organ rejection via the macrophage host response. For this, we employed biochemically inert emulsified perfluorocarbons (PFCs), known to be preferentially phagocytized by monocytes and macrophages. Isografts from C57BL/6 or allografts from C57B10.A mice were heterotopically transplanted into C57BL/6 recipients. PFCs were applied intravenously followed by (1) H/(19) F MRI at 9.4 T 24 h after injection. (1) H images showed a similar position and anatomy of the graft in the abdomen for both cases. However, corresponding (19) F signals were only observed in allogenic tissue. (1) H/(19) F MRI enabled us to detect the initial immune response not later than 3 days after surgery, when conventional parameters did not reveal any signs of rejection. In allografts, the observed (19) F signal strongly increased with time and correlated with the extent of rejection. In separate experiments, rapamycin was used to demonstrate the ability of (19) F MRI to monitor immunosuppressive therapy. Thus, PFCs can serve as positive contrast agent for the early detection of transplant rejection by (19) F MRI with high spatial resolution and an excellent degree of specificity due to lack of any (19) F background.
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Affiliation(s)
- U Flögel
- Cardiovascular Physiology, Heinrich Heine University Düsseldorf, Germany.
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315
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Tschierske C. Fluorinated Liquid Crystals: Design of Soft Nanostructures and Increased Complexity of Self-Assembly by Perfluorinated Segments. Top Curr Chem (Cham) 2011; 318:1-108. [DOI: 10.1007/128_2011_267] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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316
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de Campo L, Varslot T, Moghaddam MJ, Kirkensgaard JJK, Mortensen K, Hyde ST. A novel lyotropic liquid crystal formed by triphilic star-polyphiles: hydrophilic/oleophilic/fluorophilic rods arranged in a 12.6.4. tiling. Phys Chem Chem Phys 2011; 13:3139-52. [DOI: 10.1039/c0cp01201g] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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317
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Mazloum-Ardakani M, Beitollahi H, Amini MK, Mirkhalaf F, Mirjalili BF, Akbari A. Application of 2-(3,4-dihydroxyphenyl)-1,3-dithialone self-assembled monolayer on gold electrode as a nanosensor for electrocatalytic determination of dopamine and uric acid. Analyst 2011; 136:1965-70. [DOI: 10.1039/c0an00823k] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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318
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Scheibe P, Schoenhentz J, Platen T, Hoffmann-Röder A, Zentel R. Langmuir-Blodgett films of fluorinated glycolipids and polymerizable lipids and their phase separating behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18246-18255. [PMID: 21058675 DOI: 10.1021/la1029917] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper describes the phase separating behavior of Langmuir monolayers from mixtures of different lipids that (i) either carry already a glycopeptide recognition site or can be easily modified to carry one and (ii) polymerizable lipids. To ensure demixing during compression, we used fluorinated lipids for the biological headgroups and hydrocarbon based lipids as polymerizable lipids. As a representative for a lipid monomer, which can be polymerized in the hydrophilic headgroup, a methacrylic monomer was used. As a monomer, which can be polymerized in the hydrophobic tail, a lipid with a diacetylene unit was used (pentacosadiynoic acid, PDA). The fluorinated lipids were on the one hand a perfluorinated lipid with three chains and on the other hand a partially fluorinated lipid with a T(N)-antigen headgroup. The macroscopic phase separation was observed by Brewster angle microscopy, whereas the phase separation on the nanoscale level was observed by atomic force microscopy. It turned out that all lipid mixtures showed (at least) a partial miscibility of the hydrocarbon compounds in the fluorinated compounds. This is positive for pattern formation, as it allows the formation of small demixed 2D patterned structures during crystallization from the homogeneous phase. For miscibility especially a liquid analogue phase proved to be advantageous. As lipid 3 with three fluorinated lipid chains (very stable monolayer) is miscible with the polymerizable lipids 1 and 2, it was mostly used for further investigations. For all three lipid mixtures, a phase separation on both the micrometer and the nanometer level was observed. The size of the crystalline domains could be controlled not only by varying the surface pressure but also by varying the molar composition of the mixtures. Furthermore, we showed that the binary mixture can be stabilized via UV polymerization. After polymerization and subsequent expansion of the barriers, the locked-in polymerized structures are stable even at low surface pressures (10 mN/m), where the unpolymerized mixture did not show any segregation.
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Affiliation(s)
- Patrick Scheibe
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55099 Mainz, Germany
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319
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Nakahara H, Lee S, Krafft MP, Shibata O. Fluorocarbon-hybrid pulmonary surfactants for replacement therapy--a Langmuir monolayer study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18256-18265. [PMID: 21049919 DOI: 10.1021/la103118d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Effective additives to pulmonary surfactant (PS) preparations for therapy of respiratory distress syndrome (RDS) are being intensively sought. We report here the investigation of the effects of partially fluorinated amphiphiles (PFA) on the surface behavior of a model PS formulation. When small amounts of a partially fluorinated alcohol C(8)F(17)C(m)H(2m)OH (F8HmOH, m = 5 and 11) are added to the PS model preparation (a dipalmitoylphosphatidylcholine (DPPC)/Hel 13-5 peptide mixture) considered here, the effectiveness of the latter in in vitro pulmonary functions is enhanced. The mechanism for the improved efficacy depends on the hydrophobic chain length of the added PFA molecules. The shorter PFA, F8H5OH, when incorporated in the monolayer of the PS model preparation, promotes a disordered liquid-expanded (LE) phase upon lateral compression (fluidization). In contrast, the addition of the longer PFA, F8H11OH, reduces the disordered LE/ordered liquid-condensed (LC) phase transition pressure and promotes the growth of ordered domains (solidification). Furthermore, compression-expansion cycles suggest that F8H5OH, when incorporated in the PS model preparation, undergoes an irreversible elimination into the subphase, whereas F8H11OH enhances the squeeze-out phenomenon of the SP-B mimicking peptide, which is important in pulmonary functions and is related to the formation of a solid-like monolayer at the surface and of a surface reservoir just below the surface. F8H11OH particularly reinforces the effectiveness of DPPC in terms of minimum reachable surface tension, and of preservation of the integrated hysteresis area between compression and expansion isotherms, the two latter parameters being generally accepted indices for assessing PS efficacy. We suggest that PFA amphiphiles may be useful potential additives for synthetic PS preparations destined for treatment of RDS in premature infants and in adults.
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Affiliation(s)
- Hiromichi Nakahara
- Department of Biophysical Chemistry, Faculty of Pharmaceutical Sciences, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki 859-3298, Japan
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320
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dos Ramos MC, Blas FJ. Theoretical investigation of the phase behaviour of mixtures of a novel family of perfluoroalkyl–polyoxyethylene ether diblock surfactants in aqueous solutions of carbon dioxide. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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321
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Bruce DW, Metrangolo P, Meyer F, Pilati T, Präsang C, Resnati G, Terraneo G, Wainwright SG, Whitwood AC. Structure-function relationships in liquid-crystalline halogen-bonded complexes. Chemistry 2010; 16:9511-24. [PMID: 20665578 DOI: 10.1002/chem.201000717] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
New liquid-crystalline materials were prepared by self-assembly driven by halogen bonding between a range of 4-alkoxystilbazoles, 4-alkyl-, and 4-alkoxy-substituted pyridines as halogen-bonding acceptors, and substituted derivatives of 4-iodotetrafluorophenyl as halogen-bonding donors. Despite the fact that the starting materials are not mesomorphic, the dimeric, halogen-bonded complexes obtained exhibited nematic and SmA phases, depending on the length of the alkyl chains present on the components. The modularity of this approach also led to new chiral mesogens starting from non-mesomorphic chiral compounds.
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Affiliation(s)
- Duncan W Bruce
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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322
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Broniatowski M, Flasiński M, Dynarowicz-Łatka P, Majewski J. Partially Fluorinated Thioethers at the Water/Air Interface. Langmuir Monolayer Characterization and X-ray Scattering Studies. J Phys Chem B 2010; 114:12549-57. [DOI: 10.1021/jp105114d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Marcin Broniatowski
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Michał Flasiński
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Patrycja Dynarowicz-Łatka
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Jarosław Majewski
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland, and Lujan Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
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323
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de Gracia Lux C, Krafft MP. Nonpolar Gemini Amphiphiles Self-Assemble into Stacked Layers of Nano-Objects. Chemistry 2010; 16:11539-42. [DOI: 10.1002/chem.201000762] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Indexed: 01/30/2023]
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324
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Plassmann MM, Berger U. Trace analytical methods for semifluorinated n-alkanes in snow, soil, and air. Anal Chem 2010; 82:4551-7. [PMID: 20446671 DOI: 10.1021/ac1005519] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Semifluorinated n-alkanes (SFAs) are anthropogenic chemicals that are used in ski waxes and, thus, are released directly into the environment, but their subsequent fate and distribution are as yet unknown. Therefore, simple, selective, and sensitive methods were developed for analyzing trace amounts of SFAs in snow/water, soil, and air samples by gas chromatography coupled to electron capture negative ionization mass spectrometry (GC/ECNI-MS). Recoveries were generally in the range of 70-120%, depending on the compound and matrix. The analytical sensitivity was higher for SFAs with longer fluorinated chains, and the instrumental limits of detection ranged from 0.3 to 260 pg injected, providing method detection limits of 0.54-311 ng L(-1), 0.004-9.86 ng g(-1), and 0.4-531 ng m(-3) for snow (analyzed as its meltwater), soil, and air samples, respectively. Using the developed procedures, SFAs were found in snow (meltwater) and soil samples from a small cross-country ski area in Sweden at concentrations up to 1.3 microg L(-1) and 47 pg g(-1), respectively.
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Affiliation(s)
- Merle M Plassmann
- Department of Applied Environmental Science (ITM), Stockholm University, 106 91 Stockholm, Sweden.
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325
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Sabín J, Prieto G, Estelrich J, Sarmiento F, Costas M. Insertion of semifluorinated diblocks on DMPC and DPPC liposomes. Influence on the gel and liquid states of the bilayer. J Colloid Interface Sci 2010; 348:388-92. [DOI: 10.1016/j.jcis.2010.04.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 04/22/2010] [Accepted: 04/23/2010] [Indexed: 10/19/2022]
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326
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Malone SM, Trabelsi S, Zhang S, Lee TR, Schwartz DK. Self-Assembly of Linactants: Micelles and Lyotropic Liquid Crystals in Two Dimensions. J Phys Chem B 2010; 114:8616-20. [DOI: 10.1021/jp104375s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stephanie M. Malone
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, and Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | - Siwar Trabelsi
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, and Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | - Shishan Zhang
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, and Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | - T. Randall Lee
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, and Department of Chemistry, University of Houston, Houston, Texas 77204-5003
| | - Daniel K. Schwartz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80309-0424, and Department of Chemistry, University of Houston, Houston, Texas 77204-5003
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327
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Broniatowski M, Dynarowicz-Łątka P, Camacho L, Martin Romero MT, Muñoz E. Semifluorinated thiols in Langmuir monolayers. J Colloid Interface Sci 2010; 346:153-62. [DOI: 10.1016/j.jcis.2010.02.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 02/18/2010] [Accepted: 02/19/2010] [Indexed: 10/19/2022]
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328
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de Gracia Lux C, Gallani JL, Waton G, Krafft M. Compression of Self-Assembled Nano-Objects: 2D/3D Transitions in Films of (Perfluoroalkyl)Alkanes-Persistence of an Organized Array of Surface Micelles. Chemistry 2010; 16:7186-98. [DOI: 10.1002/chem.200903535] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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329
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Kataoka S, Takeuchi Y, Endo A. Nanometer-sized domains in Langmuir-Blodgett films for patterning SiO2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:6161-6163. [PMID: 20369867 DOI: 10.1021/la100998h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In this study, we prepared Langmuir-Blodgett films with domains ranging from 20 to 100 nm in size by using perfluorinated fatty acids. The domain size of the obtained LB films is markedly smaller than the ordinary domain size of hydrocarbons and fluorocarbons on the micrometer scale. The domains were prepared by controlling their growth through the addition of 2-propanol to the subphase of Langmuir monolayers. Furthermore, the prepared domains in the LB films were used as templates for patterning SiO(2) films. The obtained SiO(2) films have completely negative structures compared with those of the domains in the LB films.
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Affiliation(s)
- Sho Kataoka
- National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
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330
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Giraudeau C, Flament J, Marty B, Boumezbeur F, Mériaux S, Robic C, Port M, Tsapis N, Fattal E, Giacomini E, Lethimonnier F, Le Bihan D, Valette J. A new paradigm for high-sensitivity19F magnetic resonance imaging of perfluorooctylbromide. Magn Reson Med 2010; 63:1119-24. [DOI: 10.1002/mrm.22269] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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331
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Holt DJ, Payne RJ, Abell C. Synthesis of novel fluorous surfactants for microdroplet stabilisation in fluorous oil streams. J Fluor Chem 2010. [DOI: 10.1016/j.jfluchem.2009.12.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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332
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Lau YTR, Weng LT, Ng KM, Chan CM. Surface chemical composition and conformation of liquid crystalline polymers studied with ToF-SIMS and XPS. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3180] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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333
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Ebner B, Behm P, Jacoby C, Burghoff S, French BA, Schrader J, Flögel U. Early assessment of pulmonary inflammation by 19F MRI in vivo. Circ Cardiovasc Imaging 2010; 3:202-10. [PMID: 20061515 DOI: 10.1161/circimaging.109.902312] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Emulsified perfluorocarbons (PFCs) are preferentially phagocytized by monocytes/macrophages and are readily detected by (19)F MRI. This study tests the hypothesis that (19)F MRI can be used to quantitate pulmonary inflammation by tracking of infiltrating PFC-loaded monocytes. METHODS AND RESULTS Pneumonia was induced in mice by intratracheal instillation of lipopolysaccharides (LPS) followed by intravenous injection of PFCs. Whereas regular (1)H MRI provided no evidence of lung injury 24 hours after LPS, the concurrent (19)F images clearly show PFC accumulation in both pulmonary lobes. Imaging at 48 hours after LPS revealed signals in (1)H images at the same location as the 24-hour (19)F signals. Thus, progressive pneumonia was first predicted by (19)F MRI early after PFC administration. Without LPS, at no time were (19)F signals observed within the lung. Histology and fluorescence-activated cell sorting (FACS) combined with (19)F MRI confirmed the presence of infiltrating PFC-loaded monocytes/macrophages after LPS challenge. Additional experiments with graded doses of LPS demonstrated that (19)F signal intensity strongly correlated with both LPS dose and pathological markers of lung inflammation. In separate studies, dexamethasone and CGS21680 (adenosine 2A receptor agonist) were used to demonstrate the ability of (19)F MRI to monitor anti-inflammatory therapies. CONCLUSIONS PFCs serve as a contrast agent for the prognostic and quantitative assessment of pulmonary inflammation by in vivo (19)F MRI, which is characterized by a high degree of specificity due to the lack of any (19)F background. Because PFCs are biochemically inert, this approach may also be suitable for human applications.
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Affiliation(s)
- Bernd Ebner
- Institut für Herz- und Kreislaufphysiologie, Heinrich-Heine-Universität, Düsseldorf, Germany
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334
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George CB, Ratner MA, Szleifer I. Langmuir monolayers with internal dipoles: Understanding phase behavior using Monte Carlo simulations. J Chem Phys 2010; 132:014703. [DOI: 10.1063/1.3280389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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335
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Godeau G, Arnion H, Brun C, Staedel C, Barthélémy P. Fluorocarbon oligonucleotide conjugates for nucleic acids delivery. MEDCHEMCOMM 2010. [DOI: 10.1039/c0md00054j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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336
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Toimil P, Prieto G, Miñones Jr J, Sarmiento F. A comparative study of F-DPPC/DPPC mixed monolayers. Influence of subphase temperature on F-DPPC and DPPC monolayers. Phys Chem Chem Phys 2010; 12:13323-32. [DOI: 10.1039/c0cp00506a] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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337
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Becker MM, Ravoo BJ. Highly fluorinated cyclodextrins and their host–guest interactions. Chem Commun (Camb) 2010; 46:4369-71. [DOI: 10.1039/c0cc00616e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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338
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Langmuir monolayers and Langmuir–Blodgett films of 1-acyl-1,2,4-triazoles. J Colloid Interface Sci 2009; 340:276-84. [DOI: 10.1016/j.jcis.2009.08.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Revised: 08/21/2009] [Accepted: 08/31/2009] [Indexed: 11/17/2022]
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339
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Gels from a semifluorinated n-alkane in fluorinated solvents as a probe for intermolecular interactions. J Colloid Interface Sci 2009; 339:259-65. [DOI: 10.1016/j.jcis.2009.07.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/16/2009] [Accepted: 07/16/2009] [Indexed: 01/06/2023]
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340
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Riess JG. Highly fluorinated amphiphilic molecules and self-assemblies with biomedical potential. Curr Opin Colloid Interface Sci 2009. [DOI: 10.1016/j.cocis.2009.05.008] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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