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Kalashnyk N, Clair S. Self-Accommodating Honeycomb Networks from Supramolecular Self-Assembly of s-Indacene-tetrone on Silver Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1067-1071. [PMID: 35015546 DOI: 10.1021/acs.langmuir.1c02640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We describe the self-assembly of s-indacene-tetrone on Ag(111), Ag(100), and Ag(110) surfaces and the formation of three hydrogen-bonded supramolecular phases representing a complex self-accommodating honeycomb network. The differences in terms of relative host-guest stability and molecular density are analyzed and discussed. Different epitaxial behaviors of the two-dimensional self-assembly are found as a response to the variations in the crystallographic orientation of the surface.
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Affiliation(s)
| | - Sylvain Clair
- Aix Marseille Univ, CNRS, IM2NP, F-13397 Marseille, France
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Öberg K, Ropponen J, Kelly J, Löwenhielm P, Berglin M, Malkoch M. Templating gold surfaces with function: a self-assembled dendritic monolayer methodology based on monodisperse polyester scaffolds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:456-465. [PMID: 23214500 DOI: 10.1021/la3041314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The antibiotic resistance developed among several pathogenic bacterial strains has spurred interest in understanding bacterial adhesion down to a molecular level. Consequently, analytical methods that rely on bioactive and multivalent sensor surfaces are sought to detect and suppress infections. To deliver functional sensor surfaces with an optimized degree of molecular packaging, we explore a library of compact and monodisperse dendritic scaffolds based on the nontoxic 2,2-bis(methylol)propionic acid (bis-MPA). A self-assembled dendritic monolayer (SADM) methodology to gold surfaces capitalizes on the design of aqueous soluble dendritic structures that bear sulfur-containing core functionalities. The nature of sulfur (either disulfide or thiol), the size of the dendritic framework (generation 1-3), the distance between the sulfur and the dendritic wedge (4 or 14 Å), and the type of functional end group (hydroxyl or mannose) were key structural elements that were identified to affect the packaging densities assembled on the surfaces. Both surface plasmon resonance (SPR) and resonance-enhanced surface impedance (RESI) experiments revealed rapid formation of homogenously covered SADMs on gold surfaces. The array of dendritic structures enabled the fabrication of functional gold surfaces displaying molecular covering densities of 0.33-2.2 molecules·nm(-2) and functional availability of 0.95-5.5 groups·nm(-2). The cell scavenging ability of these sensor surfaces for Escherichia coli MS7fim+ bacteria revealed 2.5 times enhanced recognition for G3-mannosylated surfaces when compared to G3-hydroxylated SADM surfaces. This promising methodology delivers functional gold sensor surfaces and represents a facile route for probing surface interactions between multivalently presented motifs and cells in a controlled surface setting.
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Affiliation(s)
- Kim Öberg
- Department of Fibre and Polymer Technology, School of Chemical Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Jiang G, Deng S, Baba A, Huang C, Advincula RC. On the Monolayer Adsorption of Thiol-Terminated Dendritic Oligothiophenes onto Gold Surfaces. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000427] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Liu P, Ding J. Fabrication of micro-nano hybrid patterns on a solid surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:492-7. [PMID: 19722604 DOI: 10.1021/la9021504] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A hybrid pattern with micropatterned nanoarray of Au-Pt core-shell particles in the background of Au nanoarray was fabricated via an approach combining photolithography, block copolymer micelle nanolithography, and controlled seed growth. Two pertinent patterns were also obtained: one is a hexagonal nanopattern of Au-Pt bimetallic nanodots with controlled thickness of Pt shells, and the other is an interlaced pattern of Pt microsheets and Au nanoarrays. We thus present a platform to generate regular micro-nano patterns of one or more than one metal on a solid surface.
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Affiliation(s)
- Peng Liu
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
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Satoh N, Yamamoto K. Self-assembled monolayers of metal-assembling dendron thiolate formed from dendrimers with a disulfide core. Org Lett 2009; 11:1729-32. [PMID: 19281255 DOI: 10.1021/ol900137r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel phenylazomethine dendrimers with a disulfide core (SS-DPA G1-4) were synthesized in nearly quantitative yields. Although the disulfide core is shielded by the rigid dendron shell, direct formation of the self-assembled monolayers of metal-assembling dendron thiolate was observed by XPS and electrochemical reduction of the self-assembled monolayer substrates. The dendrimers showed a similar metal-assembling manner with other derivatives. The metal assembly to the self-assembled monolayers of metal-assembling dendron thiolate was also confirmed.
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Affiliation(s)
- Norifusa Satoh
- Department of Chemistry, Faculty of Science & Technology, Keio University, Yokohama 223-8522, Japan
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Zhang W, Lalwani S, Chouai A, Simanek EE. Synthesis and Characterization of Anionic Triazine Dendrimers with a Labile Disulfide Core. Isr J Chem 2009; 49:23-30. [PMID: 19936277 PMCID: PMC2780346 DOI: 10.1560/ijc.49.1.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Anionic dendrimers based on melamine with disulfide bonds at the core were prepared to investigate the solubility of these architectures, the ability of these molecules to solubilize pyrene as a model drug, and the ability of these architectures to undergo thiol-disulfide exchange. The ability to solubilize pyrene is directly correlated with molecular weight of the dendrimer-aggregation of dendrons does not occur. Thiol-disulfide exchange occurs rapidly using dithiothreitol as the reductant to yield dendrimers with thiol cores that can undergo oxidation in air to yield the original dendrimer.
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Affiliation(s)
- Wen Zhang
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Sanjiv Lalwani
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Abdellatif Chouai
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - Eric E. Simanek
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
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Hsu CW, Liou HR, Su WF, Wang L. Self-assembled monolayers of 2-(thienyl)hexylphosphonic acid on native oxide surface of silicon fabricated by air–liquid interface-assisted method. J Colloid Interface Sci 2008; 324:236-9. [DOI: 10.1016/j.jcis.2008.04.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2008] [Revised: 04/10/2008] [Accepted: 04/11/2008] [Indexed: 10/22/2022]
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Delort E, Szöcs E, Widmer R, Siegenthaler H, Reymond JL. STM Vizualization of Thiol-Containing Peptide Dendrimers on Au(111). Macromol Biosci 2007; 7:1024-31. [PMID: 17654760 DOI: 10.1002/mabi.200700036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Peptide dendrimers assembled by solid-phase peptide synthesis using a branching diamino acid at every 2(nd) or 3(rd) position provide readily accessible synthetic model systems for proteins and enzymes. They adopt a globular shape by topology rather than by folding. Peptide dendrimers of 2(nd) and 3(rd) generation functionalized with a cysteine or cystine residue in the core were adsorbed on Au(111) surface and imaged by STM at air, under UHV, or in solution. The dendrimers appear as globular features with dimensions suggesting an extended flattened conformation, forming both single globules and ordered arrays on the surface. These images represent the first direct visualization of peptide dendrimer enzyme models.
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Affiliation(s)
- Estelle Delort
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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Luscombe CK, Proemmel S, Huck WTS, Holmes AB, Fukushima H. Synthesis of Supercritical Carbon Dioxide Soluble Perfluorinated Dendrons for Surface Modification. J Org Chem 2007; 72:5505-13. [PMID: 17585811 DOI: 10.1021/jo070293f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rational design, synthesis, and characterization of a series of novel perfluorinated dendrons 14a,b, 25a,b, 26a,b, and 18 are described. The dendrimers were designed to have a thiol at the focal point for attachment to a gold surface to enable the fabrication of self-assembled monolayers (SAMs). Perfluorinated tails were attached to the periphery to provide solubility in supercritical carbon dioxide, and to increase the hydrophobicity and the stability of self-assembled monolayers formed. Mitsunobu reactions were utilized to provide high-yielding steps allowing large-scale production of the novel dendrimers.
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Affiliation(s)
- Christine K Luscombe
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, United Kingdom.
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Jiang Y, Wang Z, Yu X, Shi F, Xu H, Zhang X, Smet M, Dehaen W. Self-assembled monolayers of dendron thiols for electrodeposition of gold nanostructures: toward fabrication of superhydrophobic/superhydrophilic surfaces and pH-responsive surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:1986-1990. [PMID: 15723499 DOI: 10.1021/la047491b] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This paper describes the fabrication of surfaces with different wettability, superhydrophobic/superhydrophilic, and pH-responsive properties. We used a self-assembled monolayer (SAM) of a dendron thiol as the underlying surface for electrodeposition of gold nanostructures. After this modification with a SAM of n-dodecanethiol or 11-mercaptoundecanol, the surface shows remarkable superhydrophobic properties with a contact angle of about 155 degrees and a tilt angle of less than 2 degrees or superhydrophilic properties with a contact angle of about 0 degrees , respectively. Moreover, a large-scale pH-responsive surface was obtained by modification with 2-(11-mercaptoundecanamido)benzoic acid (7) (MUABA). The pH-responsive behavior was amplified by using rough surfaces.
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Affiliation(s)
- Yugui Jiang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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Herranz MA, Colonna B, Echegoyen L. Metal ion recognition and molecular templating in self-assembled monolayers of cyclic and acyclic polyethers. Proc Natl Acad Sci U S A 2002; 99:5040-7. [PMID: 11959955 PMCID: PMC122718 DOI: 10.1073/pnas.072658799] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Our recent work with cyclic and acyclic polyether self-assembled monolayers (SAMs) on gold is presented. A series of dithia-crown-tetrathiafulvalene derivatives with one or two disulfide groups has been prepared, and their SAMs on gold have been characterized by electrochemistry and by reflection-absorption infrared spectroscopy. These SAMs are extremely stable on repeated electrochemical potential scans and can selectively recognize alkali metal ions. Acyclic polyether derivatives can also self-assemble on gold to yield selective metal ion recognition domains. Impedance spectroscopy data for these SAMs fit the Langmuir isotherm and allow the determination of ion association constants. Some of the SAMs prepared with new acyclic polyether derivatives are able to detect potassium cations selectively when templated in their presence. These structures are believed to be a consequence of ion "imprinting" during the process of SAM formation.
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