1
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Yang HK, Zhang C, He XN, Wang PY. Effects of alkyl chain lengths on 12-hydroxystearic acid derivatives based supramolecular organogels. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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2
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Nasr P, Leung H, Auzanneau FI, Rogers MA. Supramolecular Fractal Growth of Self-Assembled Fibrillar Networks. Gels 2021; 7:gels7020046. [PMID: 33919860 PMCID: PMC8167784 DOI: 10.3390/gels7020046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/09/2021] [Accepted: 04/12/2021] [Indexed: 11/16/2022] Open
Abstract
Complex morphologies, as is the case in self-assembled fibrillar networks (SAFiNs) of 1,3:2,4-Dibenzylidene sorbitol (DBS), are often characterized by their Fractal dimension and not Euclidean. Self-similarity presents for DBS-polyethylene glycol (PEG) SAFiNs in the Cayley Tree branching pattern, similar box-counting fractal dimensions across length scales, and fractals derived from the Avrami model. Irrespective of the crystallization temperature, fractal values corresponded to limited diffusion aggregation and not ballistic particle–cluster aggregation. Additionally, the fractal dimension of the SAFiN was affected more by changes in solvent viscosity (e.g., PEG200 compared to PEG600) than crystallization temperature. Most surprising was the evidence of Cayley branching not only for the radial fibers within the spherulitic but also on the fiber surfaces.
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Affiliation(s)
- Pedram Nasr
- Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada; (P.N.); (H.L.)
| | - Hannah Leung
- Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada; (P.N.); (H.L.)
| | | | - Michael A. Rogers
- Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada; (P.N.); (H.L.)
- Correspondence: ; Tel.: +11-519-824-4120 (ext. 54327)
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3
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Avendaño-Vásquez G, De la Peña-Gil A, Charó-Alvarado ME, Charó-Alonso MA, Toro-Vazquez JF. Self-Assembly of Symmetrical and Asymmetrical Alkyl Esters in the Neat State and in Oleogels. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020. [DOI: 10.3389/fsufs.2020.00132] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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4
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Lan Y, Lv M, Guo S, Nasr P, Ladizhansky V, Vaz R, Corradini MG, Hou T, Ghazani SM, Marnangoni A, Rogers MA. Molecular motifs encoding self-assembly of peptide fibers into molecular gels. SOFT MATTER 2019; 15:9205-9214. [PMID: 31710326 DOI: 10.1039/c9sm01793c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Peptides are a promising class of gelators, due to their structural simplicity, biocompatibility and versatility. Peptides were synthesized based on four amino acids: leucine, phenylalanine, tyrosine and tryptophan. These peptide gelators, with systematic structural variances in side chain structure and chain length, were investigated using Hansen solubility parameters to clarify molecular features that promote gelation in a wide array of solvents. It is of utmost importance to combine both changes to structural motifs and solvent in simultaneous studies to obtain a global perspective of molecular gelation. It was found that cyclization of symmetric dipeptides, into 2,5-diketopiperazines, drastically altered the gelation ability of the dipeptides. C-l-LL and C-l-YY, which are among the smallest peptide LMOGs reported to date, are robust gelators with a large radius of gelation (13.44 MPa1/2 and 13.90 MPa1/2, respectively), and even outperformed l-FF (5.61 MPa1/2). Interestingly, both linear dipeptides (l-FF and l-LL) gelled similar solvents, yet when cyclized only cyclo-dityrosine was a robust gelator, while cyclo-diphenylalanine was not. Changes in the side chains drastically affected the crystal morphology of the resultant gels. Symmetric cyclo dipeptides of leucine and tyrosine were capable of forming extremely high aspect ratio fibers in numerous solvents, which represent new molecular motifs capable of driving self-assembly.
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Affiliation(s)
- Yaqi Lan
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong, P. R. China
| | - Muwen Lv
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong, P. R. China
| | - Shenglan Guo
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong, P. R. China
| | - Pedram Nasr
- Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
| | | | - Raoul Vaz
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Maria G Corradini
- Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada. and Arrell Food Institute, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Tao Hou
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong, P. R. China
| | - Saeed M Ghazani
- Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
| | - Alejandro Marnangoni
- Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
| | - Michael A Rogers
- Department of Food Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
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5
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Asaro F, Boga C, Demitri N, De Zorzi R, Drioli S, Gigli L, Micheletti G, Nitti P, Zangrando E. X-Ray Crystal Structures and Organogelator Properties of (R)-9-Hydroxystearic Acid. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24152854. [PMID: 31390777 PMCID: PMC6695734 DOI: 10.3390/molecules24152854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/02/2019] [Accepted: 08/03/2019] [Indexed: 11/22/2022]
Abstract
(R)-9-hydroxystearic acid, (R)-9-HSA, is a chiral nonracemic hydroxyacid of natural origin possessing interesting properties as an antiproliferative agent against different cancer types. Considering its potential application for medical and pharmaceutical purposes, the structures and rheological properties of (R)-9-HSA were investigated. Oscillatory rheology measurements reveal that (R)-9-HSA gels only paraffin oil, with less efficiency and thermal stability than its positional isomer (R)-12-HSA. Conversely, (R)-9-HSA affords crystals from methanol, acetonitrile, and carbon tetrachloride. The single crystal structures obtained both at 293 K and 100 K show non-centrosymmetric twisted carboxylic acid dimers linked at the midchain OHs into long, unidirectional chains of hydrogen bonds, owing to head-tail ordering of the molecules. Synchrotron X-ray powder diffraction experiments, performed on the solids obtained from different solvents, show the occurrence of polymorphism in paraffin oil and through thermal treatment of the solid from methanol.
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Affiliation(s)
- Fioretta Asaro
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy.
| | - Carla Boga
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, 34149 Trieste, Italy
| | - Rita De Zorzi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | - Sara Drioli
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | - Lara Gigli
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, 34149 Trieste, Italy
| | - Gabriele Micheletti
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, viale del Risorgimento 4, 40136 Bologna, Italy
| | - Patrizia Nitti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy.
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
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6
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Meyer AR, Bender CR, Dos Santos DM, Ziembowicz FI, Frizzo CP, Villetti MA, Reichert JM, Zanatta N, Bonacorso HG, Martins MAP. Effect of slight structural changes on the gelation properties of N-phenylstearamide supramolecular gels. SOFT MATTER 2018; 14:6716-6727. [PMID: 30062361 DOI: 10.1039/c8sm00961a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular gels present several applications in which the gelator properties are closely dependent on their structure and solvent. Despite this, there are few studies on the effect of the gelation ability of gelators with slight molecular changes. Therefore, N-arylestearamides (in which aryl = phenyl (1), 4-tolyl (2) and 4-acetylphenyl (3)) were evaluated in different solvents. The critical gelefication concentration (CGC) values indicated that the substituents can significantly affect the concentration at which the supramolecular gels are formed, mainly in non-aromatic solvents (e.g. cyclohexane, acetonitrile and DMSO). From UV-Vis and DSC data, we verified that the gel-sol and sol-gel transitions (Tgel-sol and Tsol-gel) increase in the order of 1 < 2 < 3. Organogel strength was evaluated for 1-3 as a function of concentration and solvent type using rheology data. Gel strength is concentration-dependent and a strength order was found in acetonitrile, cyclohexane and DMSO, in which: 1 ∼ 2 > 3. Dynamic viscoelastic measurements as a function of temperature sweeps indicate a predominantly enthalpic contribution to the elasticity of the organogels formed from 1-3. Temperature-dependent 1H NMR indicates that NHO interactions may be responsible for the molecular association of molecules into 1D fibers, while 3D fibers were formed from van der Waals interactions.
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Affiliation(s)
- Alexandre R Meyer
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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7
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Li X, Zhang F, Sun X, Hu Y, Song A, Hao J. Hydrogels formed by l-histidine derivatives with highly selective release for charged dyes. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.12.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8
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Synthesis and studies on gelation ability of phenol based maleate amphiphile and its application in nutraceutical release. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.08.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Zhang M, Weiss RG. Insights into the Gelating Abilities of Ricinelaidic Acid and its Ammonium Salts: How do Stereochemistry, Charge, and Chain Lengths Control Gelation of a Long-Chain Alkenoic Acid? Chemphyschem 2016; 17:4059-4067. [DOI: 10.1002/cphc.201600902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Mohan Zhang
- Department of Chemistry; Georgetown University; 37 & O Streets, NW Washington DC 20057-1227 USA
| | - Richard G. Weiss
- Department of Chemistry; Georgetown University; 37 & O Streets, NW Washington DC 20057-1227 USA
- Institute for Soft Matter Synthesis and Metrology; Georgetown University; 37 & O Streets, NW Washington DC 20057-1227 USA
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10
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Zhang M, Weiss RG. Mechano-Responsive, Thermo-Reversible, Luminescent Organogels Derived from a Long-Chained, Naturally Occurring Fatty Acid. Chemistry 2016; 22:8262-72. [PMID: 27135932 DOI: 10.1002/chem.201600225] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Indexed: 11/06/2022]
Abstract
The gelating ability of an α-diketo derivative of oleic acid, 9,10-dioxooctadecanoic acid (DODA), is investigated. DODA can gelate aromatic liquids and many other organic liquids. By contrast, none of the liquids examined can be gelated by the methyl ester of DODA. DODA is a more efficient gelator than stearic acid and the monoketo derivative due to its more extensive intermolecular dipole-dipole interactions. Formation of organogels of DODA can be induced by both thermal and mechanical stimuli, during which the luminescent and mechanical properties can be modulated significantly. The emission from DODA in 1-octanol exhibits a large, reversible, hypsochromic shift (≈25 nm) between its thermally cycled gel and sol states. The emission changes have been exploited to probe the kinetics of the aggregation and deaggregation processes. DODA is the simplest gelator of which we are aware that exhibits a reversible shift in the emission. Although the self-assembled fibrillar networks of the DODA gels in 1-octanol, benzonitrile, or silicone oil are crystalline, isothermal mechanical cycling between the gel and the sol states is rapid and can be repeated several times (i.e., they are thixotropic). The single-crystal structure of DODA indicates that extended intermolecular dipole-dipole interactions are crucial to the thermal and mechanical formation of DODA gels and the consequential changes in emissive and mechanical properties. From analyses of structural information, gelator packing, and morphology differences, we hypothesize that the mechanical destruction and reformation of the gel networks involves interconversion between the 3D networks and 1D fiber bundles. The thermal processes allow the fibrillar 3D networks and their 0D components (i.e., isolated molecules or small aggregates of DODA) to be interconverted. These results describe a facile approach to the design of mechano-responsive, thermo-reversible gels with control over their emission wavelengths.
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Affiliation(s)
- Mohan Zhang
- Department of Chemistry, Georgetown University, 37 & O Streets, NW, Washington DC, 20057-1227, USA
| | - Richard G Weiss
- Department of Chemistry, Georgetown University, 37 & O Streets, NW, Washington DC, 20057-1227, USA. .,Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37 & O Streets, NW, Washington DC, 20057-1227, USA.
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11
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Chen J, Wang T, Liu M. A hydro-metallogel of an amphiphilic l-histidine with ferric ions: shear-triggered self-healing and shrinkage. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00238b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An amphiphilic l-histidine derivative was found to form a hydro-metallogel showing dual shrinkage and self-healing properties.
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Affiliation(s)
- Jie Chen
- CAS Key Laboratory of Colloid
- Interface and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Tianyu Wang
- CAS Key Laboratory of Colloid
- Interface and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
| | - Minghua Liu
- CAS Key Laboratory of Colloid
- Interface and Chemical Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing
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12
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Majumder J, Yedoti P, Dastidar P. A supramolecular topical gel derived from a non-steroidal anti-inflammatory drug, fenoprofen, is capable of treating skin inflammation in mice. Org Biomol Chem 2015; 13:2300-9. [PMID: 25554116 DOI: 10.1039/c4ob02344g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A new series of bioconjugates derived from a non-steroidal anti-inflammatory drug (NSAID), namely fenoprofen, has been synthesised by amidation with various biogenic molecules such as β-alanine, aminocaproic acid and tyramine with the aim of converting the NSAID into a supramolecular gelator for plausible biomedical applications. One such bioconjugate (2) showed gelation ability with methylsalicylate (MS) and 1% menthol in methyl salicylate (MMS) solvents. These gels were characterized by table top rheology, high resolution-transmission electron microscopy (HR-TEM) and dynamic rheology. Gelator 2 was found to be biostable both in proteolytic enzymes and in blood serum of BALB/c mouse under physiological conditions. It was also found to be biocompatible, as revealed by the methyl thiazolyldiphenyl tetrazolium bromide (MTT) assay in mouse macrophage RAW 264.7 and mouse myoblast C2C12 cells. The anti-inflammatory response (prostaglandin E2 assay, denoted PGE2 assay) of 2 was comparable to that of the parent drug fenoprofen calcium salt. Finally, a topical gel formulation of 2 displayed in vivo self-delivery application in treating imiquimod (IMQ) induced skin inflammation in BALB/c mice.
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Affiliation(s)
- Joydeb Majumder
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata 700032, India.
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13
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Ohsedo Y. Low-molecular-weight organogelators as functional materials for oil spill remediation. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3712] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yutaka Ohsedo
- Advanced Materials Research Laboratory, Collaborative Research Division, Art, Science and Technology, Center for Cooperative Research; Kyushu University; 4-1 Kyudaishinmachi, Nishi-ku Fukuoka Japan
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14
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Cheng N, Hu Q, Guo Y, Wang Y, Yu L. Efficient and selective removal of dyes using imidazolium-based supramolecular gels. ACS APPLIED MATERIALS & INTERFACES 2015; 7:10258-65. [PMID: 25938635 DOI: 10.1021/acsami.5b00814] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A supramolecular gel was constructed by using an imidazolium-based surfactant, N-cetyl-N'-carboxymethyl imidazolium bromide ([N-C16, N'-CO2H-Im]Br), in the DMSO/H2O binary solvent mixtures and investigated as an adsorbent for removing dyes from aqueous solution. The self-assembled gel displays a morphology of microplatelets stacked in bilayer units with interdigitated hydrocarbon tails, and the structure remains unchanged below the sol-gel transition temperature. The gel also exhibits a strong birefringence property and excellent mechanical strength. In particular, the gels show superior performance in removal of anionic dye molecules, for example, removing 80% of eosin Y within 10 min, The constructed gels also present excellent salinity tolerance, even when the concentration of NaCl is 1000 times higher than that of the dye, and can maintain their high efficiency after 25 cycles, indicative of their promise in water treatment.
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Affiliation(s)
- Ni Cheng
- †Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, People's Republic of China
| | - Qiongzheng Hu
- ‡Department of Chemistry, University of Houston, Houston, Texas 77204, United States
| | - Yongxian Guo
- †Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, People's Republic of China
| | - Yong Wang
- §China Research Institute of Daily Chemical Industry, Taiyuan, 030001, People's Republic of China
| | - Li Yu
- †Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, People's Republic of China
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15
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Lan Y, Corradini MG, Weiss RG, Raghavan SR, Rogers MA. To gel or not to gel: correlating molecular gelation with solvent parameters. Chem Soc Rev 2015; 44:6035-58. [PMID: 25941907 DOI: 10.1039/c5cs00136f] [Citation(s) in RCA: 216] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Rational design of small molecular gelators is an elusive and herculean task, despite the rapidly growing body of literature devoted to such gels over the past decade. The process of self-assembly, in molecular gels, is intricate and must balance parameters influencing solubility and those contrasting forces that govern epitaxial growth into axially symmetric elongated aggregates. Although the gelator-gelator interactions are of paramount importance in understanding gelation, the solvent-gelator specific (i.e., H-bonding) and nonspecific (dipole-dipole, dipole-induced and instantaneous dipole induced forces) intermolecular interactions are equally important. Solvent properties mediate the self-assembly of molecular gelators into their self-assembled fibrillar networks. Herein, solubility parameters of solvents, ranging from partition coefficients (log P), to Henry's law constants (HLC), to solvatochromic parameters (ET(30)), and Kamlet-Taft parameters (β, α and π), and to Hansen solubility parameters (δp, δd, δh), are correlated with the gelation ability of numerous classes of molecular gelators. Advanced solvent clustering techniques have led to the development of a priori tools that can identify the solvents that will be gelled and not gelled by molecular gelators. These tools will greatly aid in the development of novel gelators without solely relying on serendipitous discoveries. These tools illustrate that the quest for the universal gelator should be left in the hands of Don Quixote and as researchers we must focus on identifying gelators capable of gelling classes of solvents as there is likely no one gelator capable of gelling all solvents.
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Affiliation(s)
- Y Lan
- School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
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16
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Structural and Solubility Parameter Correlations of Gelation Abilities for Dihydroxylated Derivatives of Long‐Chain, Naturally Occurring Fatty Acids. Chemistry 2015; 21:8530-43. [DOI: 10.1002/chem.201500096] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/30/2015] [Indexed: 11/07/2022]
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17
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Xu L, Hu Y, Liu M, Chen J, Huang X, Gao W, Wu H. Gelation properties and glucose-sensitive behavior of phenylboronic acid based low-molecular-weight organogels. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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18
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Rogers MA, Weiss RG. Systematic modifications of alkane-based molecular gelators and the consequences to the structures and properties of their gels. NEW J CHEM 2015. [DOI: 10.1039/c4nj01439a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural development of simple molecular gelators based on n-alkanes and the properties of their complex gels.
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Affiliation(s)
- Michael A. Rogers
- School of Environmental and Biological Sciences
- Rutgers University
- New Brunswick
- USA
| | - Richard G. Weiss
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology
- Georgetown University
- Washington
- USA
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19
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Pal A, Dey J. Organogelation by 4-(N-Tetradecanoyl)aminohydroxybutyric Acids: Effect of Hydrogen-Bonding Group in the Amphiphile Head. J Phys Chem B 2014; 118:12112-20. [DOI: 10.1021/jp506518a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amrita Pal
- Department
of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721 302, India
| | - Joykrishna Dey
- Department
of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721 302, India
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20
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Investigation of the efficiency of gelation of melamine with the positional isomers of aminobenzoic acid. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.01.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Carter KK, Rycenga HB, McNeil AJ. Improving Hg-triggered gelation via structural modifications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3522-3527. [PMID: 24646129 DOI: 10.1021/la404567b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The relationship between chemical structure and gelation ability was examined for a series of nine Hg-containing compounds. Both solid-state properties (dissolution enthalpies/entropies and packing structure) and gel properties (strength, morphology, cation selectivity, and anion tolerance) were examined. Overall, the results reveal a complex relationship between chemical structure and properties. The remediation potential of these Hg-triggered gelations was also investigated, revealing that >98% of the Hg(2+) in water can be removed through gel formation.
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Affiliation(s)
- Kelsey K Carter
- Department of Chemistry and Macromolecular Science and Engineering Program, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
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22
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Zhou C, Gao W, Yang K, Xu L, Ding J, Chen J, Liu M, Huang X, Wang S, Wu H. A novel glucose/pH responsive low-molecular-weight organogel of easy recycling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13568-13575. [PMID: 24093805 DOI: 10.1021/la4033578] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A new phenylboronic acid based gelator was developed to prepare low-molecular-weight organogel (LMOG), which could interact with several solvents to assemble into a three-dimensional nanofiber network. (1)H NMR spectroscopy study suggests that the driving force for the gelation includes hydrogen bonding and π-π stacking. Evaluated by UV-spectroscopy, the gel showed a prompt initial response to glucose at low concentration of 0.012 mmol/mL, which is a critical concentration of venous plasma glucose for diabetes. Significantly, this organogel exhibits excellent sensitivity to glucose among seven sugars tested (i.e., mannitol, galactose, lactose, maltose, sucrose, and fructose). The proposed formation of hydrogen-bonded complexes during the glucose sensing was supported by our energy calculation. Meanwhile, this organogel exhibits pH-response. Importantly, this LMOG could be conveniently recycled and thus be reused.
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Affiliation(s)
- Chaoyu Zhou
- College of Chemistry and Materials Engineering, Wenzhou University , Wenzhou 325027, China
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Bui A, Virgilio N. Tuning Organogel Properties by Controlling the Organic-Phase Composition. Ind Eng Chem Res 2013. [DOI: 10.1021/ie401965z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Anh Bui
- CREPEC, Department of Chemical
Engineering, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada
| | - Nick Virgilio
- CREPEC, Department of Chemical
Engineering, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada
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24
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Mallia VA, Weiss RG. Self-assembled fibrillar networks and molecular gels employing 12-hydroxystearic acid and its isomers and derivatives. J PHYS ORG CHEM 2013. [DOI: 10.1002/poc.3193] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- V. Ajay Mallia
- Department of Chemistry; Georgetown University; Washington DC 20057-1227, USA
| | - Richard G. Weiss
- Department of Chemistry; Georgetown University; Washington DC 20057-1227, USA
- Institute for Soft matter Synthesis and Metrology; Georgetown University; Washington DC 20057-1227, USA
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