1
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Ravarino P, Di Domenico N, Barbalinardo M, Faccio D, Falini G, Giuri D, Tomasini C. Fluorine Effect in the Gelation Ability of Low Molecular Weight Gelators. Gels 2022; 8:gels8020098. [PMID: 35200480 PMCID: PMC8871896 DOI: 10.3390/gels8020098] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/24/2022] [Accepted: 01/31/2022] [Indexed: 02/05/2023] Open
Abstract
The three gelators presented in this work (Boc-D-Phe-L-Oxd-OH F0, Boc-D-F1Phe-L-Oxd-OH F1 and Boc-D-F2Phe-L-Oxd-OH F2) share the same scaffold and differ in the number of fluorine atoms linked to the aromatic ring of phenylalanine. They have been applied to the preparation of gels in 0.5% or 1.0% w/v concentration, using three methodologies: solvent switch, pH change and calcium ions addition. The general trend is an increased tendency to form structured materials from F0 to F1 and F2. This property ends up in the formation of stronger materials when fluorine atoms are present. Some samples, generally formed by F1 or F2 in 0.5% w/v concentration, show high transparency but low mechanical properties. Two gels, both containing fluorine atoms, show increased stiffness coupled with high transparency. The biocompatibility of the gelators was assessed exposing them to fibroblast cells and demonstrated that F1 and F2 are not toxic to cells even in high concentration, while F0 is not toxic to cells only in a low concentration. In conclusion, the presence of even only one fluorine atom improves all the gelators properties: the gelation ability of the compound, the rheological properties and the transparency of the final materials and the gelator biocompatibility.
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Affiliation(s)
- Paolo Ravarino
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
| | - Nadia Di Domenico
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
| | - Marianna Barbalinardo
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, (ISMN-CNR)-Via P. Gobetti 101, 40129 Bologna, Italy;
| | - Davide Faccio
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
| | - Giuseppe Falini
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
| | - Demetra Giuri
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
- Correspondence: (D.G.); (C.T.); Tel.: +39-0512099486 (C.T.)
| | - Claudia Tomasini
- Dipartimento di Chimica Giacomo Ciamician, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy; (P.R.); (N.D.D.); (D.F.); (G.F.)
- Correspondence: (D.G.); (C.T.); Tel.: +39-0512099486 (C.T.)
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2
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Caivano I, Tošner Z, Císařová I, Nečas D, Kotora M. A General Synthetic Approach and Photophysical Properties of Regioselectively Fluorinated [5]- and [6]-Helical Bispiroindenofluorenes. Chempluschem 2020; 85:2010-2016. [PMID: 32881370 DOI: 10.1002/cplu.202000434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 08/05/2020] [Indexed: 11/11/2022]
Abstract
A first series of fluorinated [n]helical compounds (n=5 and 6) with the dihydroindenofluorene scaffold was prepared in 5 or 9 (octafluorinated dihydroindenofluorene) steps and their photophysical properties were determined. Rh-catalyzed intramolecular [2+2+2] cyclotrimerization of triyndiols, which were prepared in a modular fashion from simple starting material such as fluorinated haloarylcarbaldehydes, to the intermediate [n]helical dihydroindeno[2,1-c]fluorene-5,8-diols was the crucial synthetic step and proceeded with high efficacy. Their further transformation gave the desired selectively fluorinated bispirodihydroindeno[2,1-c]fluorenes. Their absorption and emission spectra were recorded. The fluorescence quantum yields were up to 92 % and the emission maxima were red-shifted in comparison with their non-fluorinated counterparts (386-413 nm).
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Affiliation(s)
- Ilaria Caivano
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43, Praha 2, Czech Republic
| | - Zdeněk Tošner
- NMR Laboratory, Faculty of Science, Charles University, Hlavova 8, 128 43, Praha 2, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43, Praha 2, Czech Republic
| | - David Nečas
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43, Praha 2, Czech Republic
| | - Martin Kotora
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 43, Praha 2, Czech Republic
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3
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Kodama K, Kawamata R, Hirose T. Synthesis and evaluation of chiral β-amino acid-based low-molecular-weight organogelators possessing a methyl/trifluoromethyl side chain. NEW J CHEM 2019. [DOI: 10.1039/c8nj05668d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Impacts of side-chains and chirality of organogelators derived from β-amino acids are described with their supramolecular structures.
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Affiliation(s)
- Koichi Kodama
- Department of Applied Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama
- Japan
| | - Ryuta Kawamata
- Department of Applied Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama
- Japan
| | - Takuji Hirose
- Department of Applied Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama
- Japan
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4
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Tómasson DA, Ghosh D, Kržišnik Z, Fasolin LH, Vicente AA, Martin AD, Thordarson P, Damodaran KK. Enhanced Mechanical and Thermal Strength in Mixed-Enantiomers-Based Supramolecular Gel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12957-12967. [PMID: 30272986 DOI: 10.1021/acs.langmuir.8b02729] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mixing supramolecular gels based on enantiomers leads to re-arrangement of gel fibers at the molecular level, which results in more favorable packing and tunable properties. Bis(urea) compounds tagged with a phenylalanine methyl ester in racemic and enantiopure forms were synthesized. Both enantiopure and racemate compounds formed gels in a wide range of solvents and the racemate (1-rac) formed a stronger gel network compared with the enantiomers. The gel (1R+1S) obtained by mixing equimolar amount of enantiomers (1R and 1S) showed enhanced mechanical and thermal stability compared to enantiomers and racemate gels. The preservation of chirality in these compounds was analyzed by circular dichroism and optical rotation measurements. Analysis of the scanning electron microscopy (SEM) and atomic force microscopy (AFM) images revealed that the network in the mixed gel is a combination of enantiomers and racemate fibers, which was further supported by solid-state NMR. The analysis of the packing in xerogels by solid-state NMR spectra and the existence of twisted-tape morphology in SEM and AFM images confirmed the presence of both self-sorted and co-assembled fibers in mixed gel. The enhanced thermal and mechanical strength may be attributed to the enhanced intermolecular forces between the racemate and the enantiomer and the combination of both self-sorted and co-assembled enantiomers in the mixed gel.
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Affiliation(s)
- Daníel Arnar Tómasson
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Dipankar Ghosh
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Zala Kržišnik
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
| | - Luiz Henrique Fasolin
- Centre of Biological Engineering , University of Minho , Campus de Gualtar , 4710-057 Braga , Portugal
| | - António A Vicente
- Centre of Biological Engineering , University of Minho , Campus de Gualtar , 4710-057 Braga , Portugal
| | - Adam D Martin
- School of Chemistry, The Australian Centre for Nanomedicine and the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , University of New South Wales , Sydney 2052 , Australia
| | - Pall Thordarson
- School of Chemistry, The Australian Centre for Nanomedicine and the ARC Centre of Excellence in Convergent Bio-Nano Science and Technology , University of New South Wales , Sydney 2052 , Australia
| | - Krishna K Damodaran
- Department of Chemistry, Science Institute , University of Iceland , Dunhagi 3 , 107 Reykjavík , Iceland
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5
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Deshpande AA, Torris A T A, Pahari S, Menon SK, Badiger MV, Rajamohanan PR, Wadgaonkar PP, Roy S, Tonelli C. Mechanism of the formation of microphase separated water clusters in a water-mediated physical network of perfluoropolyether tetraol. SOFT MATTER 2018; 14:2339-2345. [PMID: 29493703 DOI: 10.1039/c7sm02181j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Perfluoropolyether tetraol (PFPE tetraol) possesses a hydrophobic perfluoropolyether chain in the backbone and two hydroxyl groups at each chain terminal, which facilitates the formation of hydrogen bonds with water molecules resulting in the formation an extended physical network. About 3 wt% water was required for the formation of the microphase separated physical network of PFPE tetraol. The mechanism responsible for the microphase separation of water clusters in the physical network was studied using a combination of techniques such as NMR spectroscopy, molecular dynamics (MD) simulations and DSC. MD simulation studies provided evidence for the formation of clusters in the PFPE tetraol physical network and the size of these clusters increased gradually with an increase in the extent of hydration. Both MD simulations and NMR spectroscopy studies revealed that these clusters position themselves away from the hydrophobic backbone or vice versa. The presence of intra- and inter-chain aggregation possibility among hydrophilic groups was evident. DSC results demonstrated the presence of tightly and loosely bound water molecules to the terminal hydroxyl groups of PFPE tetraol through hydrogen bonding. The data from all the three techniques established the formation of a physical network driven by hydrogen bonding between the hydrophilic end groups of PFPE tetraol and water molecules. The flexible nature of the PFPE tetraol backbone and its low solubility parameter favour clustering of water molecules at the terminal groups and result in the formation of a gel.
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Affiliation(s)
- Ashwini A Deshpande
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India and Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Campus, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India.
| | - Arun Torris A T
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India
| | - Swagata Pahari
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India
| | - Shamal K Menon
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India
| | - Manohar V Badiger
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India and Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Campus, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India.
| | - P R Rajamohanan
- Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Campus, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India. and Central NMR Facility, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India
| | - Prakash P Wadgaonkar
- Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India and Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Campus, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India.
| | - Sudip Roy
- Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Campus, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India. and Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhaba Road, Pune 411008, Maharashtra, India
| | - Claudio Tonelli
- Solvay Specialty Polymers, Viale Lombardia 20 - 20021 Bollate (MI), Italy.
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6
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Luo S, Zhang X, Zheng Y, Harms K, Zhang L, Meggers E. Enantioselective Alkynylation of Aromatic Aldehydes Catalyzed by a Sterically Highly Demanding Chiral-at-Rhodium Lewis Acid. J Org Chem 2017; 82:8995-9005. [DOI: 10.1021/acs.joc.7b01394] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Shipeng Luo
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
- School
of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, PR China
| | - Xiao Zhang
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Yu Zheng
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Lilu Zhang
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
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7
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Liu Z, Sun J, Zhou Y, Zhang Y, Wu Y, Nalluri SKM, Wang Y, Samanta A, Mirkin CA, Schatz GC, Stoddart JF. Supramolecular Gelation of Rigid Triangular Macrocycles through Rings of Multiple C–H···O Interactions Acting Cooperatively. J Org Chem 2016; 81:2581-8. [DOI: 10.1021/acs.joc.6b00281] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhichang Liu
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Junling Sun
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Yu Zhou
- Department
of Materials Science and Engineering, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208-3113, United States
| | - Yu Zhang
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Center
for Bio-inspired Energy Science, Northwestern University, 2145 Sheridan
Road, Evanston, Illinois 60208-3113, United States
| | - Yilei Wu
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Siva Krishna Mohan Nalluri
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Yuping Wang
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Avik Samanta
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Chad A. Mirkin
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Department
of Materials Science and Engineering, Northwestern University, 2220 Campus
Drive, Evanston, Illinois 60208-3113, United States
| | - George C. Schatz
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
- Center
for Bio-inspired Energy Science, Northwestern University, 2145 Sheridan
Road, Evanston, Illinois 60208-3113, United States
| | - J. Fraser Stoddart
- Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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8
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Mikhaleva MG, Zlenko DV, Tverdislov VA, Stovbun SV. Structure formation in low-concentrated solutions of cholesterol and ergosterol. Biophysics (Nagoya-shi) 2016. [DOI: 10.1134/s0006350916020093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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9
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Feng Y, Chen H, Liu ZX, He YM, Fan QH. A Pronounced Halogen Effect on the Organogelation Properties of Peripherally Halogen Functionalized Poly(benzyl ether) Dendrons. Chemistry 2016; 22:4980-90. [DOI: 10.1002/chem.201504598] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Yu Feng
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190 P.R. China
| | - Hui Chen
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190 P.R. China
| | - Zhi-Xiong Liu
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190 P.R. China
| | - Yan-Mei He
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190 P.R. China
| | - Qing-Hua Fan
- Beijing National Laboratory for Molecular Sciences and CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences (CAS); Beijing 100190 P.R. China
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10
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García-Peña NG, Caminade AM, Ouali A, Redón R, Turrin CO. Solventless synthesis of Ru(0) composites stabilized with polyphosphorhydrazone (PPH) dendrons and their use in catalysis. RSC Adv 2016. [DOI: 10.1039/c6ra13709a] [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
Ruthenium is in the air: small Ru NPs are obtained by milling RuCl3, NaBH4 and polyphosphorhydrazone dendrons under air. The whole dendron structure is involved in the stabilization process. These NPs catalyze the selective hydrogenation of styrene.
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Affiliation(s)
- Nidia G. García-Peña
- Departamento de Tecnociencias
- Centro de Ciencias Aplicadas y Desarrollo Tecnológico
- Universidad Nacional Autónoma de México
- México
- Mexico
| | - Anne-Marie Caminade
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse cedex 4
- France
- Université de Toulouse
| | - Armelle Ouali
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse cedex 4
- France
- Université de Toulouse
| | - Rocío Redón
- Departamento de Tecnociencias
- Centro de Ciencias Aplicadas y Desarrollo Tecnológico
- Universidad Nacional Autónoma de México
- México
- Mexico
| | - Cédric-Olivier Turrin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse cedex 4
- France
- Université de Toulouse
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11
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Stovbun SV, Skoblin AA, Zanin AM, Berlin AA. Anisometric supramolecular aggregates of chiral trifluoroacetyl amino alcohol derivatives. Russ Chem Bull 2015. [DOI: 10.1007/s11172-015-0815-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Babu SS, Praveen VK, Ajayaghosh A. Functional π-gelators and their applications. Chem Rev 2014; 114:1973-2129. [PMID: 24400783 DOI: 10.1021/cr400195e] [Citation(s) in RCA: 1220] [Impact Index Per Article: 122.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sukumaran Santhosh Babu
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST) , Trivandrum 695019, India
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13
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Banno M, Wu ZQ, Makiguchi W, Furusho Y, Yashima E. Supramolecular Organogels Formed through Complementary Double-Helix Formation. Chempluschem 2013; 79:35-44. [DOI: 10.1002/cplu.201300108] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 09/09/2013] [Indexed: 02/06/2023]
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14
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Xu Y, Kang C, Chen Y, Bian Z, Qiu X, Gao L, Meng Q. In Situ Gel-to-Crystal Transition and Synthesis of Metal Nanoparticles Obtained by Fluorination of a Cyclic β-Aminoalcohol Gelator. Chemistry 2012; 18:16955-61. [DOI: 10.1002/chem.201202615] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Indexed: 11/08/2022]
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15
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Cardone A, Lopez F, Affortunato F, Busco G, Hofer AM, Mallamaci R, Martinelli C, Colella M, Farinola GM. An aryleneethynylene fluorophore for cell membrane staining. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:2808-17. [PMID: 22749749 DOI: 10.1016/j.bbamem.2012.06.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 06/02/2012] [Accepted: 06/16/2012] [Indexed: 01/25/2023]
Abstract
The use of an amphiphilic aryleneethynylene fluorophore as a plasma membrane marker in fixed and living mammalian cells and liposome model systems is demonstrated. We show here that the optical properties of the novel dye are almost independent on pH, in the range 5.0-8.0. Spectroscopic characterization performed on unilamellar liposomes ascertained that the fluorescence intensity of the aryleneethynylene fluorophore greatly increases after incorporation in lipidic membranes. Experiments performed on different mammalian cells demonstrated that the novel membrane marker exhibits fast staining and a good photostability that make it a suitable tool for live cell imaging. Importantly, the aryleneethynylene fluorophore was also shown to be a fast and reliable blue membrane marker in classical multicolor immunofluorescence experiments. This study adds new important findings to the recent exploitation of the wide class of aryleneethynylene molecules as luminescent markers for biological investigations.
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Affiliation(s)
- Antonio Cardone
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici, Bari, Italy
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16
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Minakuchi N, Hoe K, Yamaki D, Ten-no S, Nakashima K, Goto M, Mizuhata M, Maruyama T. Versatile supramolecular gelators that can harden water, organic solvents and ionic liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9259-9266. [PMID: 22650420 DOI: 10.1021/la301442f] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We developed novel supramolecular gelators with simple molecular structures that could harden a broad range of solvents: aqueous solutions of a wide pH range, organic solvents, edible oil, biodiesel, and ionic liquids at gelation concentrations of 0.1-2 wt %. The supramolecular gelators were composed of a long hydrophobic tail, amino acids and gluconic acid, which were prepared by liquid-phase synthesis. Among seven types of the gelators synthesized, the gelators containing L-Val, L-Leu, and L-Ile exhibited high gelation ability to various solvents. These gelators were soluble in aqueous and organic solvents, and also in ionic liquids at high temperature. The gelation of these solvents was thermally reversible. The microscopic observations (TEM, SEM, and CLSM) and small-angle X-ray scattering (SAXS) measurements suggested that the gelator molecules self-assembled to form entangled nanofibers in a large variety of solvents, resulting in the gelation of these solvents. Molecular mechanics and density functional theory (DFT) calculations indicated the possible molecular packing of the gelator in the nanofibers. Interestingly, the gelation of an ionic liquid by our gelator did not affect the ionic conductivity of the ionic liquid, which would provide an advantage to electrochemical applications.
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Affiliation(s)
- Nami Minakuchi
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
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17
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Palumbo Piccionello A, Guarcello A, Calabrese A, Pibiri I, Pace A, Buscemi S. Synthesis of fluorinated oxadiazoles with gelation and oxygen storage ability. Org Biomol Chem 2012; 10:3044-52. [PMID: 22395126 DOI: 10.1039/c2ob07024c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of fluorinated low molecular weight (LMW) gelators has been synthesized through SNAr substitution of 5-polyfluoroaryl-3-perfluoroheptyl-1,2,4-oxadiazoles with glycine ester. The obtained compounds give thermal and pH-sensitive hydrogels or thermo-reversible organogels in DMSO. Oxygen solubility studies showed the ability to maintain high oxygen levels in solution and in gel blend with plate counter agar (PCA).
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Affiliation(s)
- Antonio Palumbo Piccionello
- Dipartimento di Scienze e Tecnologie Molecolari e Biomolecolari - Sez. Chimica Organica E. Paternò, Università degli Studi di Palermo, Viale delle Scienze - Parco d'Orleans II, Ed. 17, I-90128, Palermo, Italy.
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Kartha KK, Babu SS, Srinivasan S, Ajayaghosh A. Attogram sensing of trinitrotoluene with a self-assembled molecular gelator. J Am Chem Soc 2012; 134:4834-41. [PMID: 22352376 DOI: 10.1021/ja210728c] [Citation(s) in RCA: 353] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Detection of explosives is of utmost importance due to the threat to human security as a result of illegal transport and terrorist activities. Trinitrotoluene (TNT) is a widely used explosive in landmines and military operations that contaminates the environment and groundwater, posing a threat to human health. Achieving the detection of explosives at a sub-femtogram level using a molecular sensor is a challenge. Herein we demonstrate that a fluorescent organogelator exhibits superior detection capability for TNT in the gel form when compared to that in the solution state. The gel when coated on disposable paper strips detects TNT at a record attogram (ag, 10(-18) g) level (∼12 ag/cm(2)) with a detection limit of 0.23 ppq. This is a simple and low-cost method for the detection of TNT on surfaces or in aqueous solutions in a contact mode, taking advantage of the unique molecular packing of an organogelator and the associated photophysical properties.
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Affiliation(s)
- Kalathil K Kartha
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum 695 019, India
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Ryan DM, Doran TM, Nilsson BL. Complementary π-π interactions induce multicomponent coassembly into functional fibrils. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:11145-11156. [PMID: 21815693 DOI: 10.1021/la202070d] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Noncovalent self-assembled materials inspired by amyloid architectures are useful for biomedical applications ranging from regenerative medicine to drug delivery. The selective coassembly of complementary monomeric units to provide ordered multicomponent fibrils is a possible strategy for enhancing the sophistication of these noncovalent materials. Herein we report that complementary π-π interactions can be exploited to promote the coassembly of phenylalanine (Phe) derivatives that possess complementary aromatic side-chain functionality. Specifically, equimolar mixtures of Fmoc-Phe and Fmoc-F(5)-Phe, which possess side-chain groups with complementary quadrupole electronics, readily coassemble to form two-component fibrils and hydrogels under conditions where Fmoc-Phe alone fails to self-assemble. In addition, it was found that equimolar mixtures of Fmoc-Phe with monohalogenated (F, Cl, and Br) Fmoc-Phe derivatives also coassembled into two-component fibrils. These results collectively indicate that face-to-face quadrupole stacking between benzyl side-chain groups does not account for the molecular recognition between Phe and halogenated Phe derivatives that promote cofibrillization but that coassembly is mediated by more subtle π-π effects arising from the halogenation of the benzyl side chain. The use of complementary π-π interactions to promote the coassembly of two distinct monomeric units into ordered two-component fibrils dramatically expands the repertoire of noncovalent interactions that can be used in the development of sophisticated noncovalent materials.
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Affiliation(s)
- Derek M Ryan
- Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, USA
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Amemiya R, Mizutani M, Yamaguchi M. Two-Component Gel Formation by Pseudoenantiomeric Ethynylhelicene Oligomers. Angew Chem Int Ed Engl 2010; 49:1995-9. [DOI: 10.1002/anie.200906693] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Amemiya R, Mizutani M, Yamaguchi M. Two-Component Gel Formation by Pseudoenantiomeric Ethynylhelicene Oligomers. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906693] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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