1
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Lee PW, Kaynak T, Al-Sabbagh D, Emmerling F, Schalley CA. Effect of Perfluorinated Side-Chain Length on the Morphology, Hydrophobicity, and Stability of Xerogel Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14390-14397. [PMID: 34851632 DOI: 10.1021/acs.langmuir.1c02341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Superhydrophobic surfaces can be quickly formed with supramolecular materials. Incorporating low-molecular-weight gelators (LMWGs) with perfluorinated chains generates xerogel coatings with low surface energies and high roughness. Here, we examine and compare the properties of the xerogel coatings formed with eight different LMWGs. These LMWGs all have a trans-1,2-diamidocyclohexane core and two perfluorinated ponytails, whose lengths vary from three to ten carbon atoms (CF3 to CF10). Investigation of the xerogels aims to provide in-depth information on the chain length effect. LMWGs with a higher degree of fluorination (CF7 to CF10) form superhydrophobic xerogel coatings with very low surface energies. Scanning electron microscopy images of the coatings show that the aggregates of CF5 and CF7 are fibrous, while the others are crystal-like. Aggregates of CF10 are particularly small and further assemble into a porous structure on the micrometer scale. To test their stabilities, the xerogel coatings were flushed multiple times with a standardized water flush test. The removal of material from the surface in these flushes was monitored by a combination of the water contact angle, contact angle hysteresis, and coating thickness measurements. A new method based on image processing techniques was developed to reliably determine the change of the coating thickness. The CF7, CF9, and CF10 surfaces show consistent hydrophobicity and coating durability after repetitive flushing tests. The length of the perfluorinated side chains thus has a significant effect on the morphology of the deposited xerogel coatings, their roughness, and, in consequence, their hydrophobicity and mechanical durability.
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Affiliation(s)
- Pin-Wei Lee
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 20, 14195 Berlin, Germany
| | - Tuğrul Kaynak
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 20, 14195 Berlin, Germany
| | - Dominik Al-Sabbagh
- Abteilung Materialchemie, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany
| | - Franziska Emmerling
- Abteilung Materialchemie, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany
| | - Christoph A Schalley
- Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 20, 14195 Berlin, Germany
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2
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Yamagishi A, Umemura Y, Tamura K, Yajima T, Sato H. Langmuir-Blodgett Films of Chiral Perfluorinated Gelators: Effects of Chirality and Chain Length on Two-Dimensional Behavior. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200245] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Akihiko Yamagishi
- Faculty of Medicine, Toho University, Tokyo 143-8540, Japan
- National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Yasushi Umemura
- Department of Applied Chemistry, National Defense Academy, Kanagawa 239-8686, Japan
| | - Kenji Tamura
- National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Tomoko Yajima
- Faculty of Science, Department of Chemistry, Ochanomizu University, Tokyo 112-8610, Japan
| | - Hisako Sato
- Graduate School of Science and Engineering, Ehime University, Matsuyama, Ehime 790-8577, Japan
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3
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Krupová M, Kessler J, Bouř P. Polymorphism of Amyloid Fibrils Induced by Catalytic Seeding: A Vibrational Circular Dichroism Study. Chemphyschem 2020; 22:83-91. [DOI: 10.1002/cphc.202000797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/16/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Monika Krupová
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
- Faculty of Mathematics and Physics Charles University Ke Karlovu 3 12116 Prague 2 Czech Republic
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
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4
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Sato H. A new horizon for vibrational circular dichroism spectroscopy: a challenge for supramolecular chirality. Phys Chem Chem Phys 2020; 22:7671-7679. [DOI: 10.1039/d0cp00713g] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The development of the solid state and time-step VCD methods opened a new horizon to reveal the mechanism of chirality amplification from microscopic to supramolecular scales.
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Affiliation(s)
- Hisako Sato
- Department of Chemistry
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
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5
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Kulkarni C, Berrocal JA, Lutz M, Palmans ARA, Meijer EW. Directing the Solid-State Organization of Racemates via Structural Mutation and Solution-State Assembly Processes. J Am Chem Soc 2019; 141:6302-6309. [PMID: 30920829 DOI: 10.1021/jacs.9b00452] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Chirality plays a central role in biomolecular recognition and pharmacological activity of drugs and can even lead to new functions such as spin filters. Although there have been significant advances in understanding and controlling the helical organization of enantiopure synthetic molecular systems, rationally dictating the assembly of mixtures of enantiomer (including racemates) is nontrivial. Here we demonstrate that a subtle change in molecular structure coupled with the understanding of assembly processes of enantiomers and racemates, in both dilute solution and concentrated gels, acts as a stepping stone to rationally control the organization in the solid-state. We have studied trans-1,2-disubstituted cyclohexanes as model systems with carboxamide, thioamide, and their combination as functional groups. On comparing the gelation propensity of individual enantiomers and racemates, we find that racemates of carboxamide, thioamide, and their combination adopt self-sorting, coassembly, and mixed organization, respectively. Remarkably, these modes of assembly of racemates were also retained in solid-state. These results point out that studying the solution-phase assembly is a key link for connecting molecular structure with the assembly in the solid-state, even for racemates.
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Affiliation(s)
- Chidambar Kulkarni
- Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems (ICMS) , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - José Augusto Berrocal
- Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems (ICMS) , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - Martin Lutz
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research , Utrecht University , 3584 CH Utrecht , The Netherlands
| | - Anja R A Palmans
- Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems (ICMS) , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - E W Meijer
- Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems (ICMS) , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
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6
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Shimasaki T, Ohno Y, Tanaka M, Amano M, Sasaki Y, Shibata H, Watanabe M, Teramoto N, Shibata M. Synthesis of Perfluoroalkyl Gelators and Their Selective Gelation Ability for Fluorinated Solvents. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20180261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Toshiaki Shimasaki
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Yuki Ohno
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Mao Tanaka
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Masato Amano
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Yuta Sasaki
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Hirobumi Shibata
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Motonori Watanabe
- International Institute for Carbon-Neutral Energy Research (I2CNER), Molecular Photoconversion Devices Division, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Naozumi Teramoto
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Mitsuhiro Shibata
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
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7
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Sato H, Watanabe K, Koshoubu J. In-Situ Monitoring of Sol-Gel Transition by Temperature-dependent VCD Method: Signal Enhancement Induced by Gelation. CHEM LETT 2018. [DOI: 10.1246/cl.180729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hisako Sato
- Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
| | - Keisuke Watanabe
- JASCO Corporation, 2967-5 Ishikawa-machi, Hachioji, Tokyo 192-8537, Japan
| | - Jun Koshoubu
- JASCO Corporation, 2967-5 Ishikawa-machi, Hachioji, Tokyo 192-8537, Japan
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8
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Sato H, Yajima T, Yamagishi A. Stereochemical effects on dynamics in two-component systems of gelators with perfluoroalkyl and alkyl chains as revealed by vibrational circular dichroism. Phys Chem Chem Phys 2018; 20:3210-3215. [DOI: 10.1039/c7cp06264h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The VCD method was applied to the gelation processes of chiral two-component gel systems.
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Affiliation(s)
- Hisako Sato
- Graduated School of Science and Engineering
- Ehime University
- Matsuyama
- Japan
| | - Tomoko Yajima
- Faculty of Science
- Department of Chemistry
- Ochanomizu University
- Tokyo 112-8610
- Japan
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9
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San LK, Spisak SN, Dubceac C, Deng SHM, Kuvychko IV, Petrukhina MA, Wang X, Popov AA, Strauss SH, Boltalina OV. Experimental and DFT Studies of the Electron‐Withdrawing Ability of Perfluoroalkyl (R
F
) Groups: Electron Affinities of PAH(R
F
)
n
Increase Significantly with Increasing R
F
Chain Length. Chemistry 2017; 24:1441-1447. [DOI: 10.1002/chem.201704868] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Long K. San
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Sarah N. Spisak
- Department of Chemistry University at Albany, State University of New York Albany New York 12222 USA
| | - Cristina Dubceac
- Department of Chemistry University at Albany, State University of New York Albany New York 12222 USA
| | - Shihu H M. Deng
- Physical Sciences Division Pacific Northwest National Laboratory MS K8 88, P.O. Box 999 Richland Washington 99352 USA
| | - Igor V. Kuvychko
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Marina A. Petrukhina
- Department of Chemistry University at Albany, State University of New York Albany New York 12222 USA
| | - Xue‐Bin Wang
- Physical Sciences Division Pacific Northwest National Laboratory MS K8 88, P.O. Box 999 Richland Washington 99352 USA
| | - Alexey A. Popov
- Department of Electrochemistry and Conducting Polymers Liebniz Institute for Solid State and Materials Research Dresden 01069 Germany
| | - Steven H. Strauss
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Olga V. Boltalina
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
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10
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Yamagishi A, Tamura K, Yajima T, Sato H. Two-dimensional Arrays of Molecular Rods as a Precursor of Gel Fibrils. CHEM LETT 2017. [DOI: 10.1246/cl.170774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Akihiko Yamagishi
- Faculty of Medicine, Toho University, 5-21-16 Omori-Nishi, Ota-ku, Tokyo 143-8540
| | - Kenji Tamura
- National Institute of Materials Science, Tsukuba, Ibaraki 305-0044
| | - Tomoko Yajima
- Faculty of Science, Department of Chemistry, Ochanomizu University, Tokyo 112-8610
| | - Hisako Sato
- Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577
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11
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P-Fluorous Phosphines as Electron-Poor/Fluorous Hybrid Functional Ligands for Precious Metal Catalysts: Synthesis of Rh(I), Ir(I), Pt(II), and Au(I) Complexes Bearing P-Fluorous Phosphine Ligands. INORGANICS 2017. [DOI: 10.3390/inorganics5010005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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12
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Taniguchi T, Hongen T, Monde K. Studying the stereostructures of biomolecules and their analogs by vibrational circular dichroism. Polym J 2016. [DOI: 10.1038/pj.2016.61] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Sato H, Yajima T, Yamagishi A. Helical Inversion of Gel Fibrils by Elongation of Perfluoroalkyl Chains as Studied by Vibrational Circular Dichroism. Chirality 2016; 28:361-4. [DOI: 10.1002/chir.22592] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 01/29/2016] [Accepted: 01/29/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Hisako Sato
- Graduated of Science and Engineering; Ehime University; Matsuyama Japan
| | - Tomoko Yajima
- Department of Chemistry; Ochanomizu University; Tokyo Japan
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