1
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McCourt J, Kewalramani S, Gao C, Roth EW, Weigand SJ, Olvera de la Cruz M, Bedzyk MJ. Electrostatic Control of Shape Selection and Nanoscale Structure in Chiral Molecular Assemblies. ACS CENTRAL SCIENCE 2022; 8:1169-1181. [PMID: 36032772 PMCID: PMC9413830 DOI: 10.1021/acscentsci.2c00447] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Indexed: 06/01/2023]
Abstract
How molecular chirality manifests at the nano- to macroscale has been a scientific puzzle since Louis Pasteur discovered biochirality. Chiral molecules assemble into meso-shapes such as twisted and helical ribbons, helicoidal scrolls (cochleates), or möbius strips (closed twisted ribbons). Here we analyze self-assembly for a series of amphiphiles, C n -K, consisting of an ionizable amino acid [lysine (K)] coupled to alkyl tails with n = 12, 14, or 16 carbons. This simple system allows us to probe the effects of electrostatic and van der Waals interactions in chiral assemblies. Small/wide-angle X-ray scattering (SAXS/WAXS) reveals that at low pH, where the headgroups are ionized (+1), C16-K forms high aspect ratio, planar crystalline bilayers. Molecular dynamics (MD) simulations reveal that tilted tails of the bilayer leaflets are interdigitated. SAXS shows that, with increasing salt concentration, C16-K molecules assemble into cochleates, whereas at elevated pH (reduced degree of ionization), helices are observed for all C n -K assemblies. The shape selection between helices and scrolls is explained by a membrane energetics model. The nano- to meso-scale structure of the chiral assemblies can be continuously controlled by solution ionic conditions. Overall, our study represents a step toward an electrostatics-based approach for shape selection and nanoscale structure control in chiral assemblies.
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Affiliation(s)
- Joseph
M. McCourt
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - Sumit Kewalramani
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Changrui Gao
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Eric W. Roth
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
| | - Steven J. Weigand
- DuPont-Northwestern-Dow
Collaborative Access Team, Northwestern
University Synchrotron Research Center, Advanced Photon Source, Argonne, Illinois 60439, United States
| | - Monica Olvera de la Cruz
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael J. Bedzyk
- Department
of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
- Department
of Materials Science and Engineering, Northwestern
University, Evanston, Illinois 60208, United States
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2
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Paul A, Jacoby G, Laor Bar-Yosef D, Beck R, Gazit E, Segal D. Glucosylceramide Associated with Gaucher Disease Forms Amyloid-like Twisted Ribbon Fibrils That Induce α-Synuclein Aggregation. ACS NANO 2021; 15:11854-11868. [PMID: 34213307 PMCID: PMC8397424 DOI: 10.1021/acsnano.1c02957] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
A major risk factor for Gaucher's disease is loss of function mutations in the GBA1 gene that encodes lysosomal β-glucocerebrosidase, resulting in accumulation of glucosylceramide (GlcCer), a key lysosomal sphingolipid. GBA1 mutations also enhance the risk for Parkinson's disease, whose hallmark is the aggregation of α-synuclein (αSyn). However, the role of accumulated GlcCer in αSyn aggregation is not completely understood. Using various biophysical assays, we demonstrate that GlcCer self-assembles to form amyloid-like fibrillar aggregates in vitro. The GlcCer assemblies are stable in aqueous media of different pH and exhibit a twisted ribbon-like structure. Near lysosomal pH GlcCer aggregates induced αSyn aggregation and stabilized its nascent oligomers. We found that several bona fide inhibitors of proteinaceous amyloids effectively inhibited aggregation of GlcCer. This study contributes to the growing evidence of cross-talk between proteinaceous amyloids and amyloid-like aggregates of metabolites accumulated in diseases and suggests these aggregates as therapeutic targets.
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Affiliation(s)
- Ashim Paul
- Department
of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine
and Cancer Research, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
| | - Guy Jacoby
- The
Raymond and Beverly Sackler School of Physics and Astronomy, The Center
for Nanoscience and Nanotechnology, and the Center for Physics and
Chemistry of Living Systems, Tel Aviv University, Tel Aviv 69978, Israel
| | - Dana Laor Bar-Yosef
- Department
of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine
and Cancer Research, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
| | - Roy Beck
- The
Raymond and Beverly Sackler School of Physics and Astronomy, The Center
for Nanoscience and Nanotechnology, and the Center for Physics and
Chemistry of Living Systems, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ehud Gazit
- Department
of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine
and Cancer Research, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
- Department
of Materials Science and Engineering, Iby and Aladar Fleischman Faculty
of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Daniel Segal
- Department
of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine
and Cancer Research, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
- Sagol
Interdisciplinary School of Neuroscience, Tel Aviv University, Ramat Aviv, Tel Aviv 6997801, Israel
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3
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Structures and strategies for enhanced sensitivity of polydiacetylene(PDA) based biosensor platforms. Biosens Bioelectron 2021; 181:113120. [PMID: 33714858 DOI: 10.1016/j.bios.2021.113120] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 01/20/2021] [Accepted: 02/25/2021] [Indexed: 11/22/2022]
Abstract
Polydiacetylene (PDA) is a versatile polymer that has been studied in numerous fields because of its unique optical properties derived from alternating multiple bonds in the polymer backbone. The conjugated structure in the polymer backbone enables PDA to possess the ability of blue-red colorimetric transition when π-π interactions in the PDA backbone chain are disturbed by the external environment. The chromatic property of PDA disturbed by external stimuli can also emit fluorescence in the red region. Owing to the unique characteristics of PDA, it has been widely studied in facile and label-free sensing applications based on colorimetric or fluorescence signals for several decades. Among the various PDA structures, membrane structures assembled by amphiphilic molecules are widely used as a versatile platform because facile modification of the synthetic membrane provides extensive applications, such as receptor-ligand interactions, resulting in potent biosensors. To use PDA as a sensory material, several methods have been studied to endow the specificity to PDA molecules and to amplify the signal from PDA supramolecules. This is because selective and sensitive detection of target materials is required at an appropriate level corresponding to each material for applicable sensor applications. This review focuses on factors that affect the sensitivity of PDA composites and several strategies to enhance the sensitivity of the PDA sensor to various structures. Owing to these strategies, the PDA sensor system has achieved a higher level of sensitivity and selectivity, enabling it to detect multiple target materials for a full field of application.
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4
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Johnson M, Bhattacharya A, Brea RJ, Podolsky KA, Devaraj NK. Temperature-Dependent Reversible Morphological Transformations in N-Oleoyl β-d-Galactopyranosylamine. J Phys Chem B 2020; 124:5426-5433. [PMID: 32437154 DOI: 10.1021/acs.jpcb.0c01410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Amphiphilic molecules self-assemble into supramolecular structures of various sizes and morphologies depending on their molecular packing and external factors. Transformations between various self-assembled morphologies are a matter of great fundamental interest. Recently, we reported the discovery of a novel class of single-chain galactopyranosylamide amphiphiles that self-assemble to form vesicles in water. Here, we describe how the vesicles composed of the amphiphile N-oleoyl β-d-galactopyranosylamine (GOA) undergo a morphological transition to fibers consisting of mainly flat sheet-like structures. Moreover, we show that this transformation is reversible in a temperature-dependent manner. We used several optical microscopy and electron microscopy techniques, circular dichroism spectroscopy, small-angle X-ray scattering, and differential scanning calorimetry, to fully investigate and characterize the morphological transformations of GOA and provide a structural basis for such phenomena. These studies provide significant molecular insight into the structural polymorphism of sugar-based amphiphiles and foresee future applications in rational design of self-assembled materials.
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Affiliation(s)
- Mai Johnson
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Ahanjit Bhattacharya
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Roberto J Brea
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Kira A Podolsky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Neal K Devaraj
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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Takahashi R, Kawauchi H, Kameta N, Lee JH, Fujii S, Shimizu T, Sakurai K. Observing the Kinetic Pathway of Nanotube Formation from Bolaamphiphiles by Time-Resolved Small-Angle X-ray Scattering. J Phys Chem B 2019; 123:4340-4345. [PMID: 31017437 DOI: 10.1021/acs.jpcb.9b01746] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We investigated the formation kinetics of a single monolayer nanotube from bolaamphiphiles (consisting of a sugar residue, an alkyl chain, and an amino group) in solution. In this bolaamphiphile, a transition from a monomerically dispersed state to the nanotube takes place by changing the solvent condition. This transition was induced by fast mixing with a stopped-flow apparatus. From just after the mixing, this transition process was monitored in situ by time-resolved small-angle X-ray scattering. In this manner, we were able to derive the direct structural information as a function of time during the nanotube formation. The results revealed that disklike aggregates initially formed, which then grew and closed to produce a tubular structure.
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Affiliation(s)
- Rintaro Takahashi
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1 Hibikino , Wakamatsu-ku, Kitakyushu , Fukuoka 808-0135 , Japan
| | - Hiroki Kawauchi
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1 Hibikino , Wakamatsu-ku, Kitakyushu , Fukuoka 808-0135 , Japan
| | | | - Ji Ha Lee
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1 Hibikino , Wakamatsu-ku, Kitakyushu , Fukuoka 808-0135 , Japan
| | - Shota Fujii
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1 Hibikino , Wakamatsu-ku, Kitakyushu , Fukuoka 808-0135 , Japan
| | | | - Kazuo Sakurai
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1 Hibikino , Wakamatsu-ku, Kitakyushu , Fukuoka 808-0135 , Japan
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6
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Shimizu T. Self-Assembly of Discrete Organic Nanotubes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170424] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Toshimi Shimizu
- AIST Fellow, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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7
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Direct imaging and computational cryo-electron microscopy of ribbons and nanotubes. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Gubitosi M, D'Annibale A, Schillén K, Olsson U, Pavel NV, Galantini L. On the stability of lithocholate derivative supramolecular tubules. RSC Adv 2017. [DOI: 10.1039/c6ra26092f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Solubility and calorimetry data provide the description of a phase map for metastable supramolecular nanotubes of biological origin.
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Affiliation(s)
- M. Gubitosi
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
- Division of Physical Chemistry
| | - A. D'Annibale
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - K. Schillén
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - U. Olsson
- Division of Physical Chemistry
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - N. V. Pavel
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
| | - L. Galantini
- Department of Chemistry
- “Sapienza” University of Rome
- 00185 Rome
- Italy
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9
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Fu HLK, Leung SYL, Yam VWW. A rational molecular design of triazine-containing alkynylplatinum(ii) terpyridine complexes and the formation of helical ribbons via Pt⋯Pt, π–π stacking and hydrophobic–hydrophobic interactions. Chem Commun (Camb) 2017; 53:11349-11352. [DOI: 10.1039/c7cc06293a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The self-assembly of strategically designed triazine-containing alkynylplatinum(ii) terpyridine complexes yielded sophisticated helical ribbons through a balance of multiple non-covalent interactions.
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Affiliation(s)
- Heidi Li-Ki Fu
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee Hong Kong) and Department of Chemistry
- The University of Hong Kong
- Hong Kong
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee Hong Kong) and Department of Chemistry
- The University of Hong Kong
- Hong Kong
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee Hong Kong) and Department of Chemistry
- The University of Hong Kong
- Hong Kong
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10
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Shim J, Kim B, Kim JM. Aminopyridine-containing supramolecular polydiacetylene: film formation, thermochromism and micropatterning. Supramol Chem 2016. [DOI: 10.1080/10610278.2016.1243792] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Jina Shim
- Department of Chemical Engineering, Hanyang University, Seoul, Korea
| | - Bubsung Kim
- Department of Chemical Engineering, Hanyang University, Seoul, Korea
| | - Jong-Man Kim
- Department of Chemical Engineering, Hanyang University, Seoul, Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul, Korea
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11
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Self-assembly of alkynylplatinum(II) terpyridine amphiphiles into nanostructures via steric control and metal-metal interactions. Proc Natl Acad Sci U S A 2016; 113:2845-50. [PMID: 26933213 DOI: 10.1073/pnas.1601673113] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
A series of mono- and dinuclear alkynylplatinum(II) terpyridine complexes containing the hydrophilic oligo(para-phenylene ethynylene) with two 3,6,9-trioxadec-1-yloxy chains was designed and synthesized. The mononuclear alkynylplatinum(II) terpyridine complex was found to display a very strong tendency toward the formation of supramolecular structures. Interestingly, additional end-capping with another platinum(II) terpyridine moiety of various steric bulk at the terminal alkyne would lead to the formation of nanotubes or helical ribbons. These desirable nanostructures were found to be governed by the steric bulk on the platinum(II) terpyridine moieties, which modulates the directional metal-metal interactions and controls the formation of nanotubes or helical ribbons. Detailed analysis of temperature-dependent UV-visible absorption spectra of the nanostructured tubular aggregates also provided insights into the assembly mechanism and showed the role of metal-metal interactions in the cooperative supramolecular polymerization of the amphiphilic platinum(II) complexes.
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12
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Wang S, Zhang Y, Xia Y, Song B. Polymorphic transformation towards formation of nanotubes by self-assembly of an achiral molecule. NANOSCALE 2015; 7:17848-17854. [PMID: 26459964 DOI: 10.1039/c5nr05790f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this paper, nanotubes with a uniform diameter were prepared by self-assembly of an achiral azobenzene-containing fatty acid. The polymorphic transformation of the assemblies during the cooling process was systematically studied. By controlling the incubation temperature, different morphologies, such as membranes, stripes, helical ribbons and tubes, were all obtained in our experiment. These elements were all predicted by Selinger et al. in the theoretical model of the formation of nanotubes. To the best of our knowledge, this is the first experimental example to fully support their theory.
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Affiliation(s)
- Shuai Wang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Yajun Zhang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Yijun Xia
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Bo Song
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
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13
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Zhang L, Yuan YZ, Tian XH, Sun JY. A thermally reversible supramolecular system based on biphenyl polydiacetylene. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.05.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Gubitosi M, Travaglini L, di Gregorio MC, Pavel NV, Vázquez Tato J, Sennato S, Olsson U, Schillén K, Galantini L. Tailoring Supramolecular Nanotubes by Bile Salt Based Surfactant Mixtures. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Gubitosi M, Travaglini L, di Gregorio MC, Pavel NV, Vázquez Tato J, Sennato S, Olsson U, Schillén K, Galantini L. Tailoring supramolecular nanotubes by bile salt based surfactant mixtures. Angew Chem Int Ed Engl 2015; 54:7018-21. [PMID: 25925079 DOI: 10.1002/anie.201500445] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 02/26/2015] [Indexed: 12/27/2022]
Abstract
An approach for tailoring self-assembled tubular structures is described. By controlling the relative composition of a two-component surfactant mixture comprising the natural bile salt lithocholate and its bolamphiphilic derivative, it was possible to finely tune the nanotube cross-section of the mixed tubular aggregates that self-associated spontaneously in aqueous solution at pH 12. The diameter was found to vary up to 50% when the stoichiometric ratio of the two bile salts was changed. The tuning of supramolecular nanochannels with such remarkable precision is of significant interest for technological applications of these materials.
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Affiliation(s)
- Marta Gubitosi
- Dipartimento di Chimica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome (Italy) luciano
| | - Leana Travaglini
- Dipartimento di Chimica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome (Italy) luciano
| | - Maria Chiara di Gregorio
- Dipartimento di Chimica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome (Italy) luciano
| | - Nicolae V Pavel
- Dipartimento di Chimica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome (Italy) luciano
| | - José Vázquez Tato
- Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo (Spain)
| | - Simona Sennato
- Istitute of Complex Systems (ISC)-CNR, UOS Sapienza, P.le Aldo Moro 2, 00185 Rome (Italy)
| | - Ulf Olsson
- Division of Physical Chemistry, Department of Chemistry, Center for Chemistry and Chemical Engineering, Lund University, 22100 Lund (Sweden)
| | - Karin Schillén
- Division of Physical Chemistry, Department of Chemistry, Center for Chemistry and Chemical Engineering, Lund University, 22100 Lund (Sweden)
| | - Luciano Galantini
- Dipartimento di Chimica, Sapienza Università di Roma, P.le Aldo Moro 5, 00185 Rome (Italy) luciano..
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16
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Barclay TG, Constantopoulos K, Matisons J. Nanotubes Self-Assembled from Amphiphilic Molecules via Helical Intermediates. Chem Rev 2014; 114:10217-91. [DOI: 10.1021/cr400085m] [Citation(s) in RCA: 185] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Thomas G. Barclay
- Flinders Centre for Nanoscale Science & Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide, South Australia 5042, Australia
| | - Kristina Constantopoulos
- Flinders Centre for Nanoscale Science & Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide, South Australia 5042, Australia
| | - Janis Matisons
- Flinders Centre for Nanoscale Science & Technology, School of Chemical and Physical Sciences, Flinders University, Adelaide, South Australia 5042, Australia
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18
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Dahan E, Sundararajan PR. Thermo-reversible gelation of rod-coil and coil-rod-coil molecules based on poly(dimethyl siloxane) and perylene imides and self-sorting of the homologous pair. SOFT MATTER 2014; 10:5337-5349. [PMID: 24935745 DOI: 10.1039/c4sm00999a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Organogels with perylene derivatives and phthalocyanines reported in the literature so far involve self-assembly promoted by hydrogen bonds, in addition to aromatic and van der Waals interactions. Although the self assembly of these types of molecules without a hydrogen bonding group in the structure occurs in solution or during crystallization, the gelation studies reported so far incorporated a hydrogen bonding pair of the type N-H···O=C in the structure of the molecule. We present a case of thermo-reversible gelation without a hydrogen bonding group in the structure of (1) a coil-rod-coil molecule based on perylenetetracarboxylic diimide (PTCDI) and poly(dimethyl siloxane) (PDMS) and (2) a rod-coil molecule with perylene dicarboxylic imide (PDI) and PDMS. However IR spectroscopy shows the presence of multiple types of hydrogen bonding between the solvents and the gelator molecules. In addition, publications so far on gelation of perylene diimide based molecules involve groups attached to both imide nitrogens and with or without substitution in the bay position. We discuss here the gelation with a Mono-substituted perylene imide. The PDMS segment was attached to one side of PDI (Mono-PDMS) or to both imide nitrogens of PTCDI (Di-PDMS). The Mono-PDMS is an inverse macromolecular surfactant applicable to non-aqueous systems, and the Di-PDMS is a Gemini surfactant. The PDMS segment that we attached to PTCDI here is longer than most substituents used by other authors. These molecules gel propylamine, as well as mixed solvents of hexane-water and diisopropylamine-water. Both hexane and diisopropylamine dissolve Mono-PDMS and Di-PDMS at room temperature and addition of water results in precipitation. However, heating the solution to about 70 °C, adding water (5-15 wt%) and slowly cooling the solution, lead to gelation. The Di-PDMS forms fibers which are not flat but curved as an eaves trough. The Mono-PDMS forms hollow spheres. Although the Mono-PDMS and Di-PDMS are a homologous pair, blends of these do not show molecular intercalation during gelation, but self-sort. The fibers of Di-PDMS based gels encapsulate the spheres of the Mono-PDMS based gels.
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Affiliation(s)
- Elianne Dahan
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada.
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19
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Nandi N, Vollhardt D. Helfrich's concept of intrinsic force and its molecular origin in bilayers and monolayers. Adv Colloid Interface Sci 2014; 208:110-20. [PMID: 24725645 DOI: 10.1016/j.cis.2014.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/28/2014] [Accepted: 03/01/2014] [Indexed: 01/05/2023]
Abstract
Bilayers and monolayers are excellent models of biological membranes. The constituents of the biological membranes such as lipids, cholesterols and proteins are chiral. Chiral molecules are abundant in nature (protein, nucleic acid and lipid). It is obvious that relationship between chirality and morphology (as well as function) of biological membrane is of interest for its fundamental importance and has technological implication regarding various membrane functions. The recent years have witnessed that a number of experimental studies in biomimetic systems have shown fascinating morphologies where chirality of the constituent molecule has decisive influence. Significant progress is made towards the understanding of these systems from the theoretical and computational studies. Helfrich's concept of intrinsic force arising from chirality is a milestone in understanding the biomimetic system such as bilayer and the related concepts, further progresses in molecular understanding made in recent years and experimental studies revealing the influence of chirality on morphology are the focus of the present review. Helfrich's concept of intrinsic force arising due to chirality is useful in understanding two-dimensional bilayers and one-dimensional monolayers and related mimetic systems. Various experimental techniques are used, which can probe the molecular architecture of these mimetic systems at different length scales and both macroscopic (thermodynamic) as well as microscopic (molecular) theories are developed. These studies are aimed to understand the role of chirality in the molecular interaction when the corresponding molecule is present in an aggregate. When one looks into the variety of morphologies exhibited by three-dimensional bilayer and two-dimensional monolayer, the later types of systems are more exotic in the sense that they show more diversity and interesting chiral discrimination. Helfrich's concept of intrinsic force may be considered useful in both cases. The intrinsic force due to chirality is the decisive factor in determining morphology which is explained by molecular approaches. Finally, biological and technological implications of such morphological variations are briefly mentioned.
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Tu ZC, Ou-Yang ZC. Recent theoretical advances in elasticity of membranes following Helfrich's spontaneous curvature model. Adv Colloid Interface Sci 2014; 208:66-75. [PMID: 24508501 DOI: 10.1016/j.cis.2014.01.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 01/16/2014] [Accepted: 01/17/2014] [Indexed: 11/19/2022]
Abstract
Recent theoretical advances in elasticity of membranes following Helfrich's famous spontaneous curvature model are summarized in this review. The governing equations describing equilibrium configurations of lipid vesicles, lipid membranes with free edges, and chiral lipid membranes are presented. Several analytic solutions to these equations and their corresponding configurations are demonstrated.
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Affiliation(s)
- Z C Tu
- Department of Physics, Beijing Normal University, Beijing 100875, China.
| | - Z C Ou-Yang
- Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China.
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21
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Lin YA, Ou YC, Cheetham AG, Cui H. Supramolecular Polymers Formed by ABC Miktoarm Star Peptides. ACS Macro Lett 2013; 2:1088-1094. [PMID: 24490124 DOI: 10.1021/mz400535g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report here the design and synthesis of an ABC miktoarm star peptide connecting through a lysine junction a short peptide sequence and two hydrophobic but immiscible blocks (a hydrocarbon and a fluorocarbon). The designed molecule can self-assemble into one-dimensional nanostructures with a great diversity of kinetically evolving morphologies in aqueous solution, while molecules that contain only one of the two hydrophobic blocks form structurally similar filaments. We believe the rich assembly behavior and morphological evolution are a direct reflection of the molecular frustration present within the filament core as a result of the in-compatibility of the fluorocarbon and hydrocarbon segments. Our finding opens new opportunities for creating complex supramolecular polymers through the architecture design of small molecular building units.
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Affiliation(s)
- Yi-An Lin
- Department of Chemical and Biomolecular Engineering and ‡Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Yu-Chuan Ou
- Department of Chemical and Biomolecular Engineering and ‡Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Andrew G. Cheetham
- Department of Chemical and Biomolecular Engineering and ‡Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering and ‡Institute for NanoBioTechnology, The Johns Hopkins University, Baltimore, Maryland 21218, United States
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22
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Yavlovich A, Viard M, Gupta K, Sine J, Vu M, Blumenthal R, Tata DB, Puri A. Low-visibility light-intensity laser-triggered release of entrapped calcein from 1,2-bis (tricosa-10,12-diynoyl)-sn-glycero-3-phosphocholine liposomes is mediated through a type I photoactivation pathway. Int J Nanomedicine 2013; 8:2575-87. [PMID: 23901274 PMCID: PMC3726434 DOI: 10.2147/ijn.s44993] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
We recently reported on the physical characteristics of photo-triggerable liposomes containing dipalmitoylphosphatidylcholine (DPPC), and 1,2-bis (tricosa-10,12-diynoyl)-sn-glycero-3-phosphocholine (DC(8,9)PC) carrying a photo agent as their payload. When exposed to a low-intensity 514 nm wavelength (continuous-wave) laser light, these liposomes were observed to release entrapped calcein green (Cal-G; Ex/Em 490/517 nm) but not calcein blue (Cal-B; Ex/Em 360/460 nm). In this study, we have investigated the mechanism for the 514 nm laser-triggered release of the Cal-G payload using several scavengers that are known specifically to inhibit either type I or type II photoreaction pathways. Liposomes containing DPPC:DC(8,9)PC: distearoylphosphatidylethanolamine (DSPE)-polyethylene glycol (PEG)-2000 (86:10:04 mole ratio) were loaded either with fluorescent (calcein) or nonfluorescent ((3)H-inulin) aqueous markers. In addition, a non-photo-triggerable formulation (1-palmitoyl-2-oleoyl phosphatidylcholine [POPC]:DC(8,9)PC:DSPE-PEG2000) was also studied with the same payloads. The 514 nm wavelength laser exposure on photo-triggerable liposomes resulted in the release of Cal-G but not that of Cal-B or (3)H-inulin, suggesting an involvement of a photoactivated state of Cal-G due to the 514 nm laser exposure. Upon 514 nm laser exposures, substantial hydrogen peroxide (H2O2, ≈100 μM) levels were detected from only the Cal-G loaded photo-triggerable liposomes but not from Cal-B-loaded liposomes (≤10 μM H2O2). The Cal-G release from photo-triggerable liposomes was found to be significantly inhibited by ascorbic acid (AA), resulting in a 70%-80% reduction in Cal-G release. The extent of AA-mediated inhibition of Cal-G release from the liposomes also correlated with the consumption of AA. No AA consumption was detected in the 514 nm laser-exposed Cal B-loaded liposomes, thus confirming a role of photoactivation of Cal-G in liposome destabilization. Inclusion of 100 mM K3Fe(CN)6 (a blocker of electron transfer) in the liposomes substantially inhibited Cal-G release, whereas inclusion of 10 mM sodium azide (a blocker of singlet oxygen of type II photoreaction) in the liposomes failed to block 514 nm laser-triggered Cal-G release. Taken together, we conclude that low-intensity 514 nm laser-triggered release of Cal-G from photo-triggerable liposomes involves the type I photoreaction pathway.
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Affiliation(s)
- Amichai Yavlovich
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
| | - Mathias Viard
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
- Basic Science Program, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Kshitij Gupta
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
| | - Jessica Sine
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
| | - Mylinh Vu
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
| | - Robert Blumenthal
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
| | - Darrell B Tata
- Centre for Devices and Radiological Health (CDRH)/Office of Science and Engineering Laboratories(OSEL)/Division of Physics, US Food and Drug Administration, White Oak, MD, USA
| | - Anu Puri
- Center for Cancer Research Nanobiology Program, National Cancer Institute, Frederick, MD, USA
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Liang HL, Noh J, Zentel R, Rudquist P, Lagerwall JPF. Tuning the defect configurations in nematic and smectic liquid crystalline shells. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2013; 371:20120258. [PMID: 23459961 DOI: 10.1098/rsta.2012.0258] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Thin liquid crystalline shells surrounding and surrounded by aqueous phases can be conveniently produced using a nested capillary microfluidic system, as was first demonstrated by Fernandez-Nieves et al. in 2007. By choosing particular combinations of stabilizers in the internal and external phases, different types of alignment, uniform or hybrid, can be ensured within the shell. Here, we investigate shells in the nematic and smectic phases under varying boundary conditions, focusing in particular on textural transformations during phase transitions, on the interaction between topological defects in the director field and inclusions in the liquid crystal (LC), and on the possibility to relocate defects within the shell by rotating the shell in the gravitational field. We demonstrate that inclusions in a shell can seed defects that cannot form in a pristine shell, adding a further means of tuning the defect configuration, and that shells in which the internal aqueous phase is not density matched with the LC will gently rearrange the internal structure upon a rotation that changes the influence of gravity. Because the defects can act as anchor points for added linker molecules, allowing self-assembly of adjacent shells, the various arrangements of defects developing in these shells and the possibility of tuning the result by modifying boundary conditions, LC phase, thickness and diameter of the shell or applying external forces make this new LC configuration very attractive.
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Affiliation(s)
- Hsin-Ling Liang
- Institute of Organic Chemistry, Johannes-Gutenberg-Universität Mainz, 55099 Mainz, Germany
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24
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Margulis-Goshen K, di Gregorio MC, Pavel NV, Abezgauz L, Danino D, Vázquez Tato J, Soto Tellini VH, Magdassi S, Galantini L. Drug-loaded nanoparticles and supramolecular nanotubes formed from a volatile microemulsion with bile salt derivatives. Phys Chem Chem Phys 2013; 15:6016-24. [PMID: 23493872 DOI: 10.1039/c3cp50258a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The main objective of this study was to form nanoparticles of a model hydrophobic drug, celecoxib, from a volatile microemulsion stabilized by a bile salt derivative. Nanoparticles were obtained by conversion of the microemulsion nanodroplets with the dissolved drug into solid nanometric particles. The use of bile salt derivatives as the surfactants for the formation of a microemulsion enabled significantly higher loading of the drug in both the microemulsion and nanoparticles, compared with the native bile salt. In addition, superior stability of the particles was achieved with the bile salt derivatives, and drug crystallization was inhibited. Interestingly, differences in particle stability and crystallization inhibition were observed between two bile salt derivatives differing only by one hydroxyl group on the bile salt backbone, indicating the delicate balance of interactions in the system. For one of the derivatives, upon dispersion of the nanoparticles in water, they spontaneously arranged into well-defined elongated nanometric tubules as detected and attested by cryo-TEM. It was found that the drug present in nanoparticles induces formation of the nanotubes.
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Affiliation(s)
- Katrin Margulis-Goshen
- The Hebrew University of Jerusalem, Edmond J. Safra campus, Givat Ram, Jerusalem, 91904, Israel
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25
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Lee HY, Oh H, Lee JH, Raghavan SR. Shedding Light on Helical Microtubules: Real-Time Observations of Microtubule Self-Assembly by Light Microscopy. J Am Chem Soc 2012; 134:14375-81. [DOI: 10.1021/ja3031856] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hee-Young Lee
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111,
United States
| | - Hyuntaek Oh
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111,
United States
| | - Jae-Ho Lee
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111,
United States
| | - Srinivasa R. Raghavan
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742-2111,
United States
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26
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Ho RM, Li MC, Lin SC, Wang HF, Lee YD, Hasegawa H, Thomas EL. Transfer of Chirality from Molecule to Phase in Self-Assembled Chiral Block Copolymers. J Am Chem Soc 2012; 134:10974-86. [DOI: 10.1021/ja303513f] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rong-Ming Ho
- Department
of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Frontier Research Center on
Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Ming-Chia Li
- Department
of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shih-Chieh Lin
- Department
of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsiao-Fang Wang
- Department
of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yu-Der Lee
- Department
of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hirokazu Hasegawa
- Department of Polymer Chemistry, Kyoto University, Kyoto 615-8510, Japan
| | - Edwin L. Thomas
- Department of Materials Science
and Engineering, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts
02139, United States
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27
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Wang M, Mohebbi AR, Sun Y, Wudl F. Ribbons, Vesicles, and Baskets: Supramolecular Assembly of a Coil-Plate-Coil Emeraldicene Derivative. Angew Chem Int Ed Engl 2012; 51:6920-4. [DOI: 10.1002/anie.201201796] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 05/15/2012] [Indexed: 11/09/2022]
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28
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Wang M, Mohebbi AR, Sun Y, Wudl F. Ribbons, Vesicles, and Baskets: Supramolecular Assembly of a Coil-Plate-Coil Emeraldicene Derivative. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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29
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Daum N, Tscheka C, Neumeyer A, Schneider M. Novel approaches for drug delivery systems in nanomedicine: effects of particle design and shape. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 4:52-65. [PMID: 22140017 DOI: 10.1002/wnan.165] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The identification of novel drug candidates for the treatment of diseases like cancer, infectious diseases, or allergies (especially asthma) assigns new tasks for pharmaceutical technology. With respect to drug delivery several problems occur such as low solubility and hence low bioavailability or restriction to inconvenient routes of administration. Nanotechnological approaches promise to circumvent some of these problems, therefore being well suited for future applications as nanomedicines. Furthermore, efficient and sufficient loading is a critical issue that is approached through mesoporous particles and/or through nonspherical particles both offering larger volumes and surfaces. Special interest is laid on the effect of shape of particulate materials on the body and related physiological mechanisms. The modified response of biological systems on different shapes opens a new dimension to adjust particle system interaction. Finally, the biological response to these systems will determine the fate with respect to their therapeutic value. Therefore, the interaction pattern between nonspherical particulate materials and biological systems as well as the production processes are highlighted.
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Affiliation(s)
- Nicole Daum
- Drug Delivery, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Center for Infection Research, Saarland University, Saarbrücken, Germany
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30
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Kiagus-Armad R, Brizard A, Tang C, Blatchly R, Desbat B, Oda R. Cooperative and Reciprocal Chiral Structure Formation of an Alanine-Based Peptide Confined at the Surface of Cationic Surfactant Membranes. Chemistry 2011; 17:9999-10009. [DOI: 10.1002/chem.201100828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Indexed: 10/18/2022]
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31
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Penfold J, Chen M, Thomas RK, Dong C, Smyth TJP, Perfumo A, Marchant R, Banat IM, Stevenson P, Parry A, Tucker I, Grillo I. Solution self-assembly of the sophorolipid biosurfactant and its mixture with anionic surfactant sodium dodecyl benzene sulfonate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8867-8877. [PMID: 21644533 DOI: 10.1021/la201661y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The self-assembly in aqueous solution of the acidic (AS) and lactonic (LS) forms of the sophorolipid biosurfactant, their mixtures, and their mixtures with anionic surfactant sodium dodecyl benzene sulfonate, LAS, has been studied using predominantly small-angle neutron scattering, SANS, at relatively low surfactant concentrations of <30 mM. The more hydrophobic lactonic sophorolipid forms small unilamellar vesicles at low surfactant concentrations, in the concentration range of 0.2 to 3 mM, and transforms via a larger unilamellar vesicle structure at 7 mM to a disordered dilute phase of tubules at higher concentrations, 10 to 30 mM. In marked contrast, the acidic sophorolipid is predominantly in the form of small globular micelles in the concentration range of 0.5 to 30 mM, with a lower concentration of larger, more planar aggregates (lamellar or vesicular) in coexistence. In mixtures of AS and LS, over the same concentration range, the micellar structure associated with the AS sophorolipid dominates the mixed-phase behavior. In mixtures of anionic surfactant LAS with the AS sophorolipid, the globular micellar structure dominates over the entire composition and concentration range studied. In contrast, mixtures of LAS with the LS sophorolipid exhibit a rich evolution in phase behavior with solution composition and concentration. At low surfactant concentrations, the small unilamellar vesicle structure present for LS-rich solution compositions evolves into a globular micelle structure as the solution becomes richer in LAS. At higher surfactant concentrations, the disordered lamellar structure present for LS-rich compositions transforms to small vesicle/lamellar coexistence, to lamellar/micellar coexistence, to micellar/lamellar coexistence, and ultimately to a pure micellar phase as the solution becomes richer in LAS. The AS sophorolipid surfactant exhibits self-assembly properties similar to those of most other weakly ionic or nonionic surfactants that have relatively large headgroups. However, the more hydrophobic nature of the lactonic sophorolipid results in a more complex and unusual evolution in phase behavior with concentration and with concentration and composition when mixed with anionic surfactant LAS.
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Affiliation(s)
- Jeff Penfold
- Physical and Theoretical Chemistry Department, University of Oxford, Oxford, UK.
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32
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Ho RM, Chiang YW, Lin SC, Chen CK. Helical architectures from self-assembly of chiral polymers and block copolymers. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.09.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Zhu X, Duan P, Zhang L, Liu M. Regulation of the Chiral Twist and Supramolecular Chirality in Co-Assemblies of Amphiphilic L-Glutamic Acid with Bipyridines. Chemistry 2011; 17:3429-37. [DOI: 10.1002/chem.201002595] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 11/17/2010] [Indexed: 11/09/2022]
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34
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Manghisi N, Leggio C, Jover A, Meijide F, Pavel NV, Soto Tellini VH, Vázquez Tato J, Agostino RG, Galantini L. Catanionic tubules with tunable charge. Angew Chem Int Ed Engl 2011; 49:6604-7. [PMID: 20718009 DOI: 10.1002/anie.201000951] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nicola Manghisi
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
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35
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36
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Lee J, Balakrishnan S, Cho J, Jeon SH, Kim JM. Detection of adulterated gasoline using colorimetric organic microfibers. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02287j] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Manghisi N, Leggio C, Jover A, Meijide F, Pavel N, Soto Tellini V, Vázquez Tato J, Agostino R, Galantini L. Catanionic Tubules with Tunable Charge. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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von Berlepsch H, Brandenburg E, Koksch B, Böttcher C. Peptide adsorption to cyanine dye aggregates revealed by cryo-transmission electron microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11452-11460. [PMID: 20364866 DOI: 10.1021/la100944d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The binding interaction between aggregates of the 5-chloro-2-[[5-chloro-3-(3-sulfopropyl)-3H-benzothiazol-2-ylidene]methyl]-3-(3-sulfopropyl)benzothiazolium hydroxide inner salt ammonium salt (CD-1) and alpha-helix, as well as beta-sheet forming de novo designed peptides, was investigated by absorption spectroscopy, circular dichroism spectroscopy, and cryogenic transmission electron microscopy. Both pure dye and pure peptides self-assembled into well-defined supramolecular assemblies in acetate buffer at pH = 4. The dye formed sheetlike and tubular H- and J-aggregates and the peptides alpha-helical coiled-coil assemblies or beta-sheet rich fibrils. After mixing dye and peptide solutions, tubular aggregates with an unusual ultrastructure were found, most likely due to the decoration of dye tubes with monolayers of peptide assemblies based on the strong electrostatic attraction between the oppositely charged species. There was neither indication of a transfer of chirality from the peptides to the dye aggregates nor the opposite effect of a structural transfer from dye aggregates onto the peptides secondary structure.
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Affiliation(s)
- Hans von Berlepsch
- Forschungszentrum für Elektronenmikroskopie, Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstrasse 36 a, D-14195 Berlin, Germany.
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39
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Green MM, Peterson NC, Sato T, Teramoto A, Cook R, Lifson S. A helical polymer with a cooperative response to chiral information. Science 2010; 268:1860-6. [PMID: 17797527 DOI: 10.1126/science.268.5219.1860] [Citation(s) in RCA: 689] [Impact Index Per Article: 45.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Polyisocyanates, long studied as theoretical models for wormlike chains in dilute solution and liquid crystals, differ from their biological helical analogs in the absence of a pre-determined helical sense. These polymers have an unusual sensitivity to chiral effects that arises from a structure in which alternating right- and left-handed long helical blocks are separated by infrequent and mobile helical reversals. Statistical thermodynamic methods yield an exact description of the polymer and the cooperative nature of its chiral properties. Minute energies that favor one of the helical senses drive easily measurable conformational changes, even though such energies may be extremely difficult to calculate from structural theory. In addition, the chiral nature of the polymer can be used to test theoretical ideas concerned with cholesteric liquid crystals, one of which solves the problem of assigning the helical sense.
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40
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Meijide F, Antelo A, Alvarez Alcalde M, Jover A, Galantini L, Pavel NV, Vázquez Tato J. Supramolecular structures generated by a p-tert-butylphenylamide derivative of deoxycholic acid. From planar sheets to tubular structures through helical ribbons. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7768-7773. [PMID: 20369848 DOI: 10.1021/la904548k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The formation of supramolecular structures initiated by a p-tert-butylphenylamide derivative of deoxycholic acid (Na-t-butPhDC) is investigated. At 1.18 mM concentration of Na-t-butPhDC and 37 degrees C, initial flat ribbons are observed which self-transform into helical ribbons (with a mean pitch angle of 47 +/- 6 degrees) which finally originate molecular tubes with an external diameter of 241 +/- 28 nm. Most of the molecular tubes show helical markings with a pitch angle value of 45 +/- 4 degrees, in full agreement with predictions of simple models based on chiral elastic properties of the membrane. A lateral association mechanism is proposed to account for the growth of the external diameter (from 225 +/- 32 to 546 +/- 59 nm) of tubes with time at 3.99 mM.
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Affiliation(s)
- Francisco Meijide
- Departamento de Química Física, Facultad de Ciencias, Universidad de Santiago de Compostela, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
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41
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Fujiki M. Mirror symmetry breaking of silicon polymersâfrom weak bosons to artificial helix. CHEM REC 2009; 9:271-98. [DOI: 10.1002/tcr.200900018] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Qiao Y, Lin Y, Wang Y, Yang Z, Liu J, Zhou J, Yan Y, Huang J. Metal-driven hierarchical self-assembled one-dimensional nanohelices. NANO LETTERS 2009; 9:4500-4504. [PMID: 19908861 DOI: 10.1021/nl9028335] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Sophisticated helical structure has been an attractive subject due to its significance in understanding of biological self-assembly and appealing application in nanoscience. In this work, a facile route toward one-dimensional helical nanostructure is presented based on metal-cholate supramolecular self-assembly. Well-defined right-handed helical nanoribbons in calcium-cholate systems are systematically investigated and a series of metal ions are exploited to drive metal-cholate supramolecular helix. It is anticipated that the incorporation of metal ions may endow versatile functionalities and merits to the self-assembled nanohelices. Particularly helical inorganic nanomaterials (i.e., SiO(2) and ZnS) have been prepared based on metal-cholate supramolecular nanohelix via two distinct templating strategies.
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Affiliation(s)
- Yan Qiao
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Analytical Instrumentation Center, Peking University, Beijing 100871, China
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Khanna S, Khan MK, Sundararajan P. Influence of double hydrogen bonds and alkyl chains on the gelation of nonchiral polyurethane model compounds: sheets, eaves trough, tubes and oriented fibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:13183-13193. [PMID: 19899821 DOI: 10.1021/la901887y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe the gelation, upon self-assembly of a series of nonchiral molecules, resulting in tubular morphology of the fibers. These are biscarbamates, which are model compounds for polyurethanes with two hydrogen bonding groups separated by a (CH(2))(6) spacer and symmetrically substituted with alkyl chains on either side varying in length from C(6) to C(18). Upon gelation, these molecules form a sheet initially. The sheets then tend to wrap, leading to tubules. Those with partial wrapping resemble eaves troughs. With the predominant growth along the hydrogen bonding direction, the energy of interaction between the molecules along this direction would be more dominant than just the van der Waals interaction in the other two, leading to asymmetry of interaction in the sheet. We rationalize such tube formation in this case on the basis of the theories [Schnur, J. M.; Ratna, B. R.; Selinger, J. V.; Singh, A.; Jyothi, G.; Easwaran, K. R. K. Science, 1994, 264, 945. Schnur, J. M. Science, 1993, 262, 166. McKierman, R. L.; Heintz, A. M.; Hsu, S. L.; Gido, S. P.; Penelle, J. Polym. Mater. Sci. Eng. 2001, 84, 416.] which were developed for amphiphilic mono and bilayers, which state that these bilayers are not at their minimal energy when they are flat, and prefer a bent state. The gelation behavior of this series with double hydrogen bond is compared with the monocarbamates with a single hydrogen bonding motif [Moniruzzaman, M.; Sundararajan, P. R. Langmuir 2005, 21, 3802.]. We attribute the tendency toward both gelation and crystallization in some cases to the competing contributions of the hydrogen bond and van der Waals interactions between the long alkyl side chains. Oriented fibers for X-ray diffraction were obtained by simply using a magnetic stir bar during gelation. It is also found that the solvents that gel with diureas [van Esch, J.; Kellogg, R. M.; Feringa, B. L. Tetrahedron Lett. 1997, 38, 281] also form gels with biscarbamates. While the biscarbamates with even number of CH(2) groups in the side chain form short fibers, one with (CH(2))(9) side group formed long fibers characteristic of organo gels. In addition, when this odd side chain biscarbamate was mixed with one having a (CH(2))(8) side group, the gelation led to long fibers, following the sergeant and soldier principle.
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Affiliation(s)
- Shalini Khanna
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6 Canada
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Zhao Y, An L, Fang J. Buckling instability of lipid tubules with multibilayer walls under local radial indentation. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:021911. [PMID: 19792155 DOI: 10.1103/physreve.80.021911] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2009] [Indexed: 05/28/2023]
Abstract
The mechanical behavior of self-assembled lipid tubules is an important property which determines their suitability for technological applications. We study the instability of multibilayer lipid tubules (with wall thickness t and external radius R(ext)) beyond elastic response under local radial atomic force microscopy indentations. A discontinuity in force-distance curves associated with the buckling instability of lipid tubules is observed. The critical force at which lipid tubules undergo a buckling transition linearly scales as t/R(ext). In addition, a reduced critical buckling force is found to extend a distance of approximately 1 microm from the end of lipid tubules.
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Affiliation(s)
- Yue Zhao
- Department of Mechanical, Materials, and Aerospace Engineering, Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, Florida 32816, USA
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Sun G, Chu CC. Self-assembly of chemically engineered hydrophilic dextran into microscopic tubules. ACS NANO 2009; 3:1176-1182. [PMID: 19388659 DOI: 10.1021/nn800704q] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Although macromolecular self-assemblies are mostly fabricated from amphiphilic copolymers, here we report a tubular structure self-assembled solely from hydrophilic dextran-derived homopolymers via electrostatic interaction. To obtain tubular structures, we prepared two oppositely charged dextran derivatives by incorporating 2-bromoethylamine (Dex-BH) and chloroacetic acid (Dex-CA) into dextran, and their structures were confirmed using Fourier transform infrared spectroscopy. The two oppositely charged dextran derivatives self-assembled into microsize tubules when mixed in a pH 4.0 buffer solution. The tubular self-assemblies were sensitive to both pH and salt concentrations. Scanning electron microscopy and light microscopy confirmed that the tubules have hollow structures up to 100 microm long with a diameter between 600 nm and 2 microm. The X-ray study did not reveal any ordered molecular organization. This paper explores the mechanism of the tubule self-assembly and suggests a model.
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Affiliation(s)
- Guoming Sun
- Fiber and Polymer Science Program, Department of Fiber Science & Apparel Design, Cornell University, Ithaca, New York 14853-4401, USA
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Shimizu T. Molecular Self-Assembly into One-Dimensional Nanotube Architectures and Exploitation of Their Functions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1554] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Yoon J, Kim JM. Fabrication of Conjugated Polymer Supramolecules in Electrospun Micro/Nanofibers. MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200800297] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Delclos T, Aimé C, Pouget E, Brizard A, Huc I, Delville MH, Oda R. Individualized silica nanohelices and nanotubes: tuning inorganic nanostructures using lipidic self-assemblies. NANO LETTERS 2008; 8:1929-1935. [PMID: 18505303 DOI: 10.1021/nl080664n] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Diverse chiral nanometric ribbons and tubules formed by self-assembly of organic amphiphilic molecules could be transcribed to inorganic nanostructures using a novel sol-gel transcription protocol with tetraethoxysilane (TEOS) in the absence of catalyst or cosolvent. By controlling parameters such as temperature or the concentration of the different reactants, we could finely tune the morphology of the inorganic nanostructures formed from organic templates. This fine-tuning has also been achieved upon controlling the kinetics of both organic assembly formation and inorganic polycondensation. The results presented herein show that the dynamic and versatile nature of the organic gels considerably enhances the tunability of inorganic materials with rich polymorphisms.
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Affiliation(s)
- Thomas Delclos
- Institut Europeen de Chimie et Biologie, Universite de Bordeaux CNRS UMR 5248, 2 rue Robert Escarpit, 33607 Pessac, France
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Jin H, Qiu H, Sakamoto Y, Shu P, Terasaki O, Che S. Mesoporous Silicas by Self-Assembly of Lipid Molecules: Ribbon, Hollow Sphere, and Chiral Materials. Chemistry 2008; 14:6413-20. [DOI: 10.1002/chem.200701988] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Marx KA, OH S, Angelopoulos AP. Gold Surface Adsorption Properties of the Enzymatically Polymerized Amphiphilic Decyl Ester ofL‐Tyrosine. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2008. [DOI: 10.1080/10601320802100499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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