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Abraham B, Agredo P, Mensah SG, Nilsson BL. Anion Effects on the Supramolecular Self-Assembly of Cationic Phenylalanine Derivatives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15494-15505. [PMID: 36473193 PMCID: PMC9776537 DOI: 10.1021/acs.langmuir.2c01394] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Supramolecular hydrogels have emerged as a class of promising biomaterials for applications such as drug delivery and tissue engineering. Self-assembling peptides have been well studied for such applications, but low molecular weight (LMW) amino acid-derived gelators have attracted interest as low-cost alternatives with similar emergent properties. Fluorenylmethyloxycarbonyl-phenylalanine (Fmoc-Phe) is one such privileged motif often chosen due to its inherent self-assembly potential. Previously, we developed cationic Fmoc-Phe-DAP gelators that assemble into hydrogel networks in aqueous NaCl solutions of sufficient ionic strength. The chloride anions in these solutions screen the cationic charge of the gelators to enable self-assembly to occur. Herein, we report the effects of varying the anions of sodium salts on the gelation potential, nanoscale morphology, and hydrogel viscoelastic properties of Fmoc-Phe-DAP and two of its fluorinated derivatives, Fmoc-3F-Phe-DAP and Fmoc-F5-Phe-DAP. It was observed that both the anion identity and gelator structure had a significant impact on the self-assembly and gelation properties of these derivatives. Changing the anion identity resulted in significant polymorphism of the nanoscale morphology of the assembled states that was dependent on the chemical structure of the gelator. The emergent viscoelastic character of the hydrogel networks was also found to be reliant on the anion identity and gelator structure. These results demonstrate the complex interplay between the gelator and environment that have a profound and often unpredictable impact on both self-assembly properties and emergent viscoelasticity in supramolecular hydrogels formed by LMW compounds. This work also illustrates the current lack of understanding that limits the rational design of potential biomaterials that will be in contact with complex biological fluids and provides motivation for additional research to correlate the chemical structure of LMW gelators with the structure and emergent properties of the resulting supramolecular assemblies as a function of environment.
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Affiliation(s)
- Brittany
L. Abraham
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Pamela Agredo
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Samantha G. Mensah
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Bradley L. Nilsson
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
- Materials
Science Program, University of Rochester, Rochester, New York 14627-0166, United States
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Acar M, Tatini D, Ninham BW, Rossi F, Marchettini N, Lo Nostro P. The Lyotropic Nature of Halates: An Experimental Study. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238519. [PMID: 36500616 PMCID: PMC9739596 DOI: 10.3390/molecules27238519] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022]
Abstract
Unlike halides, where the kosmotropicity decreases from fluoride to iodide, the kosmotropic nature of halates apparently increases from chlorate to iodate, in spite of the lowering in the static ionic polarizability. In this paper, we present an experimental study that confirms the results of previous simulations. The lyotropic nature of aqueous solutions of sodium halates, i.e., NaClO3, NaBrO3, and NaIO3, is investigated through density, conductivity, viscosity, and refractive index measurements as a function of temperature and salt concentration. From the experimental data, we evaluate the activity coefficients and the salt polarizability and assess the anions' nature in terms of kosmotropicity/chaotropicity. The results clearly indicate that iodate behaves as a kosmotrope, while chlorate is a chaotrope, and bromate shows an intermediate nature. This experimental study confirms that, in the case of halates XO3-, the kosmotropic-chaotropic ranking reverses with respect to halides. We also discuss and revisit the role of the anion's polarizability in the interpretation of Hofmeister phenomena.
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Affiliation(s)
- Mert Acar
- Department of Chemistry “Ugo Schiff” and CSGI, University of Florence, 50019 Firenze, Italy
| | - Duccio Tatini
- Department of Chemistry “Ugo Schiff” and CSGI, University of Florence, 50019 Firenze, Italy
| | - Barry W. Ninham
- Materials Physics (Formerly Department of Applied Mathematics), Research School of Physics, Australian National University, Canberra, ACT 2600, Australia
- School of Science, University of New South Wales, Northcott Drive, Campbell, Canberra, ACT 2612, Australia
| | - Federico Rossi
- Department of Earth, Environmental and Physical Sciences, University of Siena, 53100 Siena, Italy
| | - Nadia Marchettini
- Department of Earth, Environmental and Physical Sciences, University of Siena, 53100 Siena, Italy
| | - Pierandrea Lo Nostro
- Department of Chemistry “Ugo Schiff” and CSGI, University of Florence, 50019 Firenze, Italy
- Correspondence: ; Tel.: +39-055-4573010
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3
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Dragulet F, Goyal A, Ioannidou K, Pellenq RJM, Del Gado E. Ion Specificity of Confined Ion-Water Structuring and Nanoscale Surface Forces in Clays. J Phys Chem B 2022; 126:4977-4989. [PMID: 35731697 DOI: 10.1021/acs.jpcb.2c01738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ion specificity and related Hofmeister effects, which are ubiquitous in aqueous systems, can have spectacular consequences in hydrated clays, where ion-specific nanoscale surface forces can determine large-scale cohesive swelling and shrinkage behaviors of soil and sediments. We have used a semiatomistic computational approach and examined sodium, calcium, and aluminum counterions confined with water between charged surfaces representative of clay materials to show that ion-water structuring in nanoscale confinement is at the origin of surface forces between clay particles which are intrinsically ion-specific. When charged surfaces strongly confine ions and water, the amplitude and oscillations of the net pressure naturally emerge from the interplay of electrostatics and steric effects, which cannot be captured by existing theories. Increasing confinement and surface charge densities promote ion-water structures that increasingly deviate from the ions' bulk hydration shells, being strongly anisotropic, persistent, and self-organizing into optimized, nearly solid-like assemblies where hardly any free water is left. Under these conditions, strongly attractive interactions can prevail between charged surfaces because of the dramatically reduced dielectric screening of water and the highly organized water-ion structures. By unravelling the ion-specific nature of these nanoscale interactions, we provide evidence that ion-specific solvation structures determined by confinement are at the origin of ion specificity in clays and potentially a broader range of confined aqueous systems.
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Affiliation(s)
- Francis Dragulet
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Abhay Goyal
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States.,Infrastructure Materials Group, Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Katerina Ioannidou
- Laboratoire de Mécanique et Génie Civil, CNRS Université de Montpellier, Montpellier 34090, France
| | - Roland J-M Pellenq
- EPiDaPo, The Joint CNRS and George Washington University Laboratory, Children's National Medical Center, Children's Research Institute, 111 Michigan Avenue NW, Washington, D.C. 20010, United States
| | - Emanuela Del Gado
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
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Zaidi SFA, Kim YA, Saeed A, Sarwar N, Lee NE, Yoon DH, Lim B, Lee JH. Tannic acid modified antifreezing gelatin organohydrogel for low modulus, high toughness, and sensitive flexible strain sensor. Int J Biol Macromol 2022; 209:1665-1675. [PMID: 35487373 DOI: 10.1016/j.ijbiomac.2022.04.099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/26/2022] [Accepted: 04/14/2022] [Indexed: 12/17/2022]
Abstract
Current hydrogel strain sensors have met assorted essential requirements of wearing comfort, mechanical toughness, and strain sensitivity. However, an increment in the toughness of a hydrogel usually leads to an increase in elastic moduli that could be unfavorable for wearing comfort. In addition, traits of biofriendly and sustainability require synthesis of the hydrogels from natural polymer-based networks. We propose a novel strategy to fabricate an ionic conductive organohydrogel from natural biological macromolecule "gelatin" and polyacid "tannic acid" to resolve these challenges. Tannic acid modified the structure of the gelatin network in the ionic conductive organohydrogels, that not only led to an increase in toughness accompanying a decrease in elastic moduli but also headed to higher strain sensitivity and tunability. The proposed methodology exhibited tunable tensile modulus from 27 to 13 kPa, tensile strength from 287 to 325 kPa, elongation at fracture from 510 to 620%, toughness from 500 to 550 kJ/m3, conductivity from 0.29 to 0.8 S/m, and strain sensitivity (GF = 1.4-6.5). Moreover, the proposed organohydrogel exhibited excellent freezing tolerance. This study provides a facile yet powerful strategy to tune the mechanical and electrical properties of organohydrogels which can be adapted to various wearable sensors.
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Affiliation(s)
- Syed Farrukh Alam Zaidi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of Metallurgical and Materials Engineering, University of Engineering and Technology, Lahore 39161, Pakistan
| | - Yun Ah Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Aiman Saeed
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Nasir Sarwar
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of Textile Engineering, University of Engineering and Technology, Lahore (Faisalabad Campus) 38000, Pakistan
| | - Nae-Eung Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Dae Ho Yoon
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Byungkwon Lim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
| | - Jung Heon Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
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Segiet D, Stockmann A, Sadowski J, Katzenberg F, Tiller JC. Insights in the Thermal Volume Transition of Poly(2‐oxazoline) Hydrogels. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100157] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dominik Segiet
- Biomaterials & Polymer Science, Department of Biochemical and Chemical Engineering TU Dortmund 44221 Dortmund Germany
| | - Annika Stockmann
- Biomaterials & Polymer Science, Department of Biochemical and Chemical Engineering TU Dortmund 44221 Dortmund Germany
| | - Jan Sadowski
- Biomaterials & Polymer Science, Department of Biochemical and Chemical Engineering TU Dortmund 44221 Dortmund Germany
| | - Frank Katzenberg
- Biomaterials & Polymer Science, Department of Biochemical and Chemical Engineering TU Dortmund 44221 Dortmund Germany
| | - Joerg C. Tiller
- Biomaterials & Polymer Science, Department of Biochemical and Chemical Engineering TU Dortmund 44221 Dortmund Germany
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6
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Influence of salts in the Hofmeister series on the physical gelation behavior of gelatin in aqueous solutions. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106150] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Xiao W, Zhang P, Wei H, Yu Y. Rapidly Visible-Light-Mediated Photogelations for One-Step Engineering Multifunctional Tough Hydrogel Tubes. ACS Macro Lett 2020; 9:1681-1686. [PMID: 35617070 DOI: 10.1021/acsmacrolett.0c00621] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Hydrogel tubes as one kind of perfusable tubular materials, show promising applications in a wide spectrum of fields. However, there is still a great challenge to design a rapid, biocompatible, and straightforward strategy for one-step engineering tough hydrogel tubes, which have excellent mechanical properties, unique resilience, and multiple functions. Herein, we explore visible-light-mediated orthogonal photochemistry to achieve the fabrication of tough hydrogel tubes with double networks via a coaxial-nozzle spinning technique under short blue-light irradiation (∼20 s). The as-prepared tubes are tough (2.3 MJ m-3) and have mechanical strength (∼300 kPa) with a critical strain of 16, good fatigue resistance, and resilience (>95% within 3 min). These perfusable tubular hydrogels not only can be knitted and assembled to complicated 2D/3D structures, but also are designed to fabricate functional tubes in one step with the applications in fields of smart materials, soft electronics, and sensors.
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Affiliation(s)
- Wenqing Xiao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an China, 710000
| | - Ping Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an China, 710000
| | - Hongqiu Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an China, 710000
| | - You Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an China, 710000
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