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Lamarche RM, DeWolf C. ω-Thiolation of Phenolic Surfactants Enables Controlled Conversion between Extended, Bolaform, and Multilayer Conformations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2847-2857. [PMID: 32101013 DOI: 10.1021/acs.langmuir.9b03670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The self-assembly of ω-thiolated surfactants onto gold is a well-studied phenomenon; however, control over the final organization within the thin films is either limited or requires extensive pre- and post-deposition chemical modifications. On the other hand, Langmuir-Blodgett deposition from the air-water interfaces affords a high degree of control over lateral organization within the film, yet it is generally employed to create physisorbed, soft matter films. Despite this, relatively little is known about the impact of the ω-thiolation on either the air-water of deposited film organization. Here, we show that the introduction of a terminal hydrophilic thiol on a phenolic surfactant does not necessarily disrupt a highly organized film nor does it necessarily induce a bolaform conformation at the interface. We show that the relative proportions of different conformations can be controlled using pH, relaxation time, surface pressure, and combinations thereof. Moreover, at high pH, the system undergoes a monolayer-to-multilayer transition wherein well-defined multilayer structures and morphologies are generated. These multilayers appear to comprise a single bolaform conformation atop an extended-chain condensed phase. We demonstrate that these structures can be transferred using Langmuir-Blodgett deposition demonstrating that combining these two approaches has the potential to achieve greater control over the functional properties of robust, chemisorbed films.
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Affiliation(s)
- Renaud Miclette Lamarche
- Department of Chemistry and Biochemistry and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec H4B 1R6, Canada
| | - Christine DeWolf
- Department of Chemistry and Biochemistry and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec H4B 1R6, Canada
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Dey B, Debnath P, Chakraborty S, Deb B, Bhattacharjee D, Majumdar S, Hussain SA. Study of Compression-Induced Supramolecular Nanostructures of an Imidazole Derivative by Langmuir-Blodgett Technique. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8383-8394. [PMID: 28791869 DOI: 10.1021/acs.langmuir.7b01750] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this communication, we report the design and synthesis as well as the supramolecular assembly behavior of a 2,4,5-triaryl imidazole derivative (compound 1) at the air-water interface and in thin films using Langmuir-Blodgett (LB) technique. The main idea for such a chemical structure is that the long alkyl chain and N-H of the imidazole core may help to form supramolecular architecture through the hydrophobic-hydrophobic interaction and hydrogen bonding, respectively. Accordingly, the interfacial behavior as well as morphology of 1 in thin films were studied through a series of characterization methods such as surface pressure-area (π-A) isotherm, hysteresis analysis, ultraviolet-visible (UV-vis) absorption and steady-state fluorescence spectroscopies, Fourier transform infrared, X-ray diffraction, Brewster angle microscopy (BAM), and atomic force microscopy (AFM) measurements, and so forth. Pressure-area isotherm is an indication toward the formation of supramolecular nanostructures instead of an ideal monolayer at the air-water interface. This has been confirmed by the hysteresis analysis and BAM measurement at the air-water interface. AFM images of 1 in the LB monolayer exhibits the formation of supramolecular nanowires as well as nanorods. By controlling different film-forming parameters, it becomes possible to manipulate these nanostructures. With the passage of time, the nanowires come close to each other and become straight. Similarly, nanorods come close to each other and form bundles of several rods in the LB films. H-bonding, J-aggregation, as well as compression during film formation might play a key role in the formation of such nanostructures. Electrical switching behavior of compound 1 was also observed because of the presence of an electron donor-acceptor system in 1. This type of organic switching behavior may be promising for next-generation organic electronics.
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Affiliation(s)
| | | | - Santanu Chakraborty
- Department of Physics, NIT Agartala , Jiraniya, Agartala 799046, West Tripura, Tripura, India
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Al-Shereiqi AS, Boyd BJ, Saito K. Photo-Switchable Self-Assemblies Based on Thymine-Containing Bolaamphiphiles. Chempluschem 2017; 82:1135-1144. [PMID: 31957328 DOI: 10.1002/cplu.201700207] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Indexed: 11/09/2022]
Abstract
The photoswitching of photosensitive bolaamphiphiles based on thymine was investigated. Topochemical principles were applied to create light-responsive supra-amphiphiles by the utilisation of dynamic covalent bonds created by the photo-dimerisation of a DNA base, thymine. In order to induce the photo-dimerisation of thymine, two bolaamphiphilic molecules were designed and synthesised to meet the required [2 π+2 π] photo-cycloaddition conditions. The amphiphiles were synthesised with different spacers and their photo-reversibility and morphologies were studied by using UV/Vis, NMR and infrared spectroscopy, rheometry, dynamic light scattering and transmission electron microscopy.
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Affiliation(s)
| | - Ben J Boyd
- Drug Delivery, Disposition and Dynamics and ARC Centre of Excellence, in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Kei Saito
- School of Chemistry, Monash University, Clayton, VIC, 3800, Australia
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Kim HY, Novak BR, Shrestha B, Lee SE, Moldovan D. THE ROLE OF THE ASYMMETRIC BOLAAMPHIPHILIC CHARACTER OF VECAR ON THE KINETIC AND STRUCTURAL ASPECTS OF ITS SELF-ASSEMBLY: A MOLECULAR DYNAMICS SIMULATION STUDY. Colloids Surf A Physicochem Eng Asp 2017; 523:9-18. [PMID: 29051686 PMCID: PMC5642949 DOI: 10.1016/j.colsurfa.2017.03.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
VECAR are novel bolaamphiphilic molecules consisting of two hydrophilic molecular groups, a carnosine derivative and a chromanol group, covalently linked by a hydrophobic alkyl spacer of varying length. Despite the potential for application in various biomedical applications VECAR properties, including their bulk properties, are still largely unknown. The early stage of the self-assembly process of VECAR molecules in water is studied using molecular dynamics simulations. The study reveals that the length of the hydrophobic spacer in VECAR affects the aggregation kinetics as well as the size, shape, density, and atomistic structure of the self-assembled aggregates. A mechanism based on cooperative interactions between water, the hydrophilic hydroxyl group, and the hydrophobic benzene ring of the chromanol head is proposed to explain the ordered packings of chromanols in the self-assembled aggregate structures at the aggregate-water interface.
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Affiliation(s)
- Hye-Young Kim
- Department of Chemistry and Physics, Southeastern Louisiana University, Hammond, LA 70402
| | - Brian R. Novak
- Mechanical & Industrial Engineering Department, Louisiana State University, Baton Rouge, LA 70803
- Center for Computation and Technology, Louisiana State University, Baton Rouge, LA 70803
| | - Bijay Shrestha
- Department of Chemistry and Physics, Southeastern Louisiana University, Hammond, LA 70402
| | - S. Emma Lee
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, GA 30332
| | - Dorel Moldovan
- Mechanical & Industrial Engineering Department, Louisiana State University, Baton Rouge, LA 70803
- Center for Computation and Technology, Louisiana State University, Baton Rouge, LA 70803
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Tobe Y, Tahara K, De Feyter S. Adaptive Building Blocks Consisting of Rigid Triangular Core and Flexible Alkoxy Chains for Self-Assembly at Liquid/Solid Interfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160214] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Zeng H, Johnson ME, Oldenhuis N, Tiambeng TN, Guan Z. Structure-Based Design of Dendritic Peptide Bolaamphiphiles for siRNA Delivery. ACS CENTRAL SCIENCE 2015; 1:303-312. [PMID: 26436138 PMCID: PMC4582325 DOI: 10.1021/acscentsci.5b00233] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Indexed: 05/21/2023]
Abstract
Development of safe and effective delivery vectors is a critical challenge for the application of RNA interference (RNAi)-based biotechnologies. In this study we show the rational design of a series of novel dendritic peptide bolaamphiphile vectors that demonstrate high efficiency for the delivery of small interfering RNA (siRNA) while exhibiting low cytotoxicity and hemolytic activity. Systematic investigation into structure-property relationships revealed an important correlation between molecular design, self-assembled nanostructure, and biological activity. The unique bolaamphiphile architecture proved a key factor for improved complex stability and transfection efficiency. The optimal vector contains a fluorocarbon core and exhibited enhanced delivery efficiency to a variety of cell lines and improved serum resistance when compared to hydrocarbon analogues and lipofectamine RNAiMAX. In addition to introducing a promising new vector system for siRNA delivery, the structure-property relationships and "fluorocarbon effect" revealed herein offer critical insight for further development of novel materials for nucleic acid delivery and other biomaterial applications.
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Zhang G, Hu F, Zhang D. Manipulation of the aggregation and deaggregation of tetraphenylethylene and silole fluorophores by amphiphiles: emission modulation and sensing applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4593-4604. [PMID: 25331184 DOI: 10.1021/la5029367] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this Feature Article, we have summarized the recent advances in the fluorescence modulation of tetraphenylethylene and silole fluorophores by manipulating the respective aggregation/deaggregation with amphiphiles. These include (i) the assembly of neutral tetraphenylethylene analogues with the aid of an ionic amphiphile, (ii) the aggregation of ionic tetraphenylethylene and silole induced by amphiphiles, and (iii) bio/chemosensors based on the aggregation/deaggregation of AIE fluorophores tuned by ionic amphiphiles.
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Affiliation(s)
- Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fang Hu
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Zhou Z, Gu F, Peng L, Hu Y, Wang Q. Spectroscopic analysis and in vitro imaging applications of a pH responsive AIE sensor with a two-input inhibit function. Chem Commun (Camb) 2015; 51:12060-3. [DOI: 10.1039/c5cc03788c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel terpyridine derivative formed stable aggregates in aqueous media (DMSO/H2O = 1/99) with dramatically enhanced fluorescence compared to its organic solution.
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Affiliation(s)
- Zhan Zhou
- School of Chemistry & Environment
- South China Normal University
- Guangzhou 510006
- China
| | - Fenglong Gu
- School of Chemistry & Environment
- South China Normal University
- Guangzhou 510006
- China
- Key Laboratory of Theoretical Chemistry of Environment
| | - Liang Peng
- School of Chemistry & Environment
- South China Normal University
- Guangzhou 510006
- China
- Key Laboratory of Theoretical Chemistry of Environment
| | - Ying Hu
- School of Chemistry & Environment
- South China Normal University
- Guangzhou 510006
- China
| | - Qianming Wang
- School of Chemistry & Environment
- South China Normal University
- Guangzhou 510006
- China
- Key Laboratory of Theoretical Chemistry of Environment
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Sensitive and photo-triggered transformation of hierarchical helices assembled from achiral bolaamphiphiles. J Colloid Interface Sci 2014; 435:1-7. [DOI: 10.1016/j.jcis.2014.08.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/06/2014] [Accepted: 08/07/2014] [Indexed: 11/20/2022]
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10
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Guo Z, Gong R, Mu Y, Wang X, Wan X. Oligopeptide-Assisted Self-Assembly of Oligothiophenes: Co-Assembly and Chirality Transfer. Chem Asian J 2014; 9:3245-50. [DOI: 10.1002/asia.201402646] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Indexed: 10/24/2022]
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Yimer YY, Jha KC, Tsige M. Epitaxial transfer through end-group coordination modulates the odd-even effect in an alkanethiol monolayer assembly. NANOSCALE 2014; 6:3496-3502. [PMID: 24553572 DOI: 10.1039/c3nr05671f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Short spacer length and high end-group coordination lead to the top network acting as a template for the buried sulfur-gold interface of n-alkanethiols (SH-(CH2)n-OH or SH-(CH2)n-CH3) on gold {111}. Annealing and templating both drive toward a higher sampling of the spatially favorable bridge adsorption sites. The hydrogen-bonded network increases in strength by increasing the number of hydrogens participating per oxygen, from 1.75 to 1.98 for n = 14-30. Higher n leads to better packing (five times for hydroxyl-terminated and seven times for methyl-terminated for n = 14-30) and stability of monolayers, while lower n results in better epitaxial transfer (transfer coefficient ratio = 13.5 for {SH-(CH2)14-OH}/{SH-(CH2)30-CH3}) and actuation. Odd values of n for the hydroxyl-terminated n-alkanethiols lead to lattice spacing of an average of 0.04 ± 0.01 Å higher than even values. There is a structural transition in properties around spacer length n = 24-27. Characterization of monolayer assembly through correlation between adatom and network layers provides recursive design principles for actuation and sensing applications.
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Affiliation(s)
- Yeneneh Y Yimer
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, USA.
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Nandre KP, Bhosale SV, Bhosale RS, Pombala S, Kumar CG, Latham K, Bhosale SV. Organogelation and cytotoxic evolution of phosphonate ester functionalised hydrophobic alkanediamide motifs. Supramol Chem 2014. [DOI: 10.1080/10610278.2014.890199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Kamalakar P. Nandre
- Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500607, Andhra, PradeshIndia
- Department of Organic Chemistry, School of Chemical Sciences, North Maharashtra University, Jalgaon 425001, India
| | - Sidhanath V. Bhosale
- Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500607, Andhra, PradeshIndia
| | - Rajesh S. Bhosale
- Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500607, Andhra, PradeshIndia
| | - Sujitha Pombala
- Natural Product Division, Chemical Biology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad 500607, India
| | - C. Ganesh Kumar
- Natural Product Division, Chemical Biology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad 500607, India
| | - Kay Latham
- School of Applied Sciences, RMIT University, GPO Box 2476, Melbourne VIC 3001, Australia
| | - Sheshanath V. Bhosale
- School of Applied Sciences, RMIT University, GPO Box 2476, Melbourne VIC 3001, Australia
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Wang X, Duan P, Liu M. Organogelation-Controlled Topochemical [2+2] Cycloaddition and Morphological Changes: From Nanofiber to Peculiar Coaxial Hollow Toruloid-Like Nanostructures. Chemistry 2013; 19:16072-9. [DOI: 10.1002/chem.201302200] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Indexed: 12/21/2022]
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14
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Ghijsens E, Ivasenko O, Tahara K, Yamaga H, Itano S, Balandina T, Tobe Y, De Feyter S. A tale of tails: alkyl chain directed formation of 2D porous networks reveals odd-even effects and unexpected bicomponent phase behavior. ACS NANO 2013; 7:8031-8042. [PMID: 23964989 DOI: 10.1021/nn4032036] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Supramolecular self-assembly of suitably functionalized building blocks on surfaces can serve as an excellent test-bed to gain understanding and control over multicomponent self-assembly in more complex matter. Here we employ a powerful combination of scanning tunnelling microscopy (STM) and molecular modeling to uncover two-dimensional (2D) crystallization and mixing behavior of a series of alkylated building blocks based on dehydrobenzo[12]annulene, forming arrays of nanowells. Thorough STM investigation employing high-resolution spatial imaging, use of specially designed marker molecules, statistical analysis and thermal stability measurements revealed rich and complex supramolecular chemistry, highlighting the impact of odd-even effects on the phase behavior. The methodology and analysis presented in this work can be easily adapted to the self-assembly of other alkylated building blocks.
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Affiliation(s)
- Elke Ghijsens
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven , Celestijnenlaan 200 F, B-3001 Leuven, Belgium
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Guo P, Liu M. In Situ Coordination and Supramolecular Chirality of Some Achiral Benzothiazole-derived Schiff Bases Fabricated at Air/Water Interface. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1199] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Peizhi Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, The Chinese Academy of Sciences
- Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, College of Chemistry, Chemical Engineering and Environment, Qingdao University
| | - Minghua Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, The Chinese Academy of Sciences
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