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Kim KY, Kim J, Moon CJ, Liu J, Lee SS, Choi MY, Feng C, Jung JH. Co‐Assembled Supramolecular Nanostructure of Platinum(II) Complex through Helical Ribbon to Helical Tubes with Helical Inversion. Angew Chem Int Ed Engl 2019; 58:11709-11714. [DOI: 10.1002/anie.201905472] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Ka Young Kim
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Jaehyeong Kim
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Cheol Joo Moon
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Jinying Liu
- School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Chuanliang Feng
- School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
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Kim KY, Kim J, Moon CJ, Liu J, Lee SS, Choi MY, Feng C, Jung JH. Co‐Assembled Supramolecular Nanostructure of Platinum(II) Complex through Helical Ribbon to Helical Tubes with Helical Inversion. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905472] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ka Young Kim
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Jaehyeong Kim
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Cheol Joo Moon
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Jinying Liu
- School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
| | - Chuanliang Feng
- School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Sciences Gyeongsang National University Jinju 52828 Republic of Korea
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Franke ME, Rehage H. Effects of Chirality on the Aggregation Properties of Amide-Bonded Pyridinium Gemini Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8968-8976. [PMID: 31189311 DOI: 10.1021/acs.langmuir.9b00592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In a series of experiments, we synthesized and characterized a new type of cationic gemini surfactant, the chiral and the achiral forms, which were compared regarding their surface-active properties. These surfactants show interesting aggregation processes, which are affected by the interplay of different structural characteristics. By substituting the counterions, we found a way to control the solubility of these compounds in order to investigate the behavior of solutions as well as insoluble monolayers. The comparison of the chiral with the meso compound instead of the racemic mixture is a major advantage for the analysis of the effects of chirality because racemates can be understood as a mixed surfactant system with one additional degree of Gibbs freedom. Furthermore, we investigated the viscoelastic behavior of concentrated aqueous surfactant solutions which formed elongated wormlike micelles. A strong effect of the stereochemistry on the aggregation properties of Langmuir layers as well as elongated micelles was found.
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Affiliation(s)
- Maximilian E Franke
- Lehrstuhl für Physikalische Chemie II , Technische Universität Dortmund , D-44227 Dortmund , Germany
| | - Heinz Rehage
- Lehrstuhl für Physikalische Chemie II , Technische Universität Dortmund , D-44227 Dortmund , Germany
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Huang Z, Che S. Fabrication of Chiral Materials via Self-Assembly and Biomineralization of Peptides. CHEM REC 2015; 15:665-74. [DOI: 10.1002/tcr.201402096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Zhehao Huang
- School of Chemistry and Chemical Technology, State Key Laboratory of Composite Materials; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
| | - Shunai Che
- School of Chemistry and Chemical Technology, State Key Laboratory of Composite Materials; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 P. R. China
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Griffiths PC, Knight DW, Morgan IR, Ford A, Brown J, Davies B, Heenan RK, King SM, Dalgliesh RM, Tomkinson J, Prescott S, Schweins R, Paul A. Gelation or molecular recognition; is the bis-(α,β-dihydroxy ester)s motif an omnigelator? Beilstein J Org Chem 2010; 6:1079-88. [PMID: 21160568 PMCID: PMC3002023 DOI: 10.3762/bjoc.6.123] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2010] [Accepted: 11/02/2010] [Indexed: 11/23/2022] Open
Abstract
Understanding the gelation of liquids by low molecular weight solutes at low concentrations gives an insight into many molecular recognition phenomena and also offers a simple route to modifying the physical properties of the liquid. Bis-(α,β-dihydroxy ester)s are shown here to gel thermoreversibly a wide range of solvents, raising interesting questions as to the mechanism of gelation. At gelator concentrations of 5-50 mg ml⁻¹, gels were successfully formed in acetone, ethanol/water mixtures, toluene, cyclohexane and chloroform (the latter, albeit at a higher gelator concentration). A range of neutron techniques - in particular small-angle neutron scattering (SANS) - have been employed to probe the structure of a selection of these gels. The universality of gelation in a range of solvent types suggests the gelation mechanism is a feature of the bis-(α,β-dihydroxy ester) motif, with SANS demonstrating the presence of regular structures in the 30-40 Å range. A correlation between the apparent rodlike character of the structures formed and the polarity of the solvent is evident. Preliminary spin-echo neutron scattering studies (SESANS) indicated the absence of any larger scale structures. Inelastic neutron spectroscopy (INS) studies demonstrated that the solvent is largely unaffected by gelation, but does reveal insights into the thermal history of the samples. Further neutron studies of this kind (particularly SESANS and INS) are warranted, and it is hoped that this work will stimulate others to pursue this line of research.
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Affiliation(s)
- Peter C Griffiths
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - David W Knight
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Ian R Morgan
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Amy Ford
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - James Brown
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Ben Davies
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Richard K Heenan
- Rutherford Appleton Laboratory, Science and Technology Research Council, Didcot, Oxfordshire OX11 0QX U.K
| | - Stephen M King
- Rutherford Appleton Laboratory, Science and Technology Research Council, Didcot, Oxfordshire OX11 0QX U.K
| | - Robert M Dalgliesh
- Rutherford Appleton Laboratory, Science and Technology Research Council, Didcot, Oxfordshire OX11 0QX U.K
| | - John Tomkinson
- Rutherford Appleton Laboratory, Science and Technology Research Council, Didcot, Oxfordshire OX11 0QX U.K
| | - Stuart Prescott
- School of Chemistry, Bristol University, Cantock’s Close, Bristol BS8 1TS U.K
| | - Ralf Schweins
- Institut Laue Langevin, 6 rue Jules Horowitz, 38042 Grenoble, Cedex 9, France
| | - Alison Paul
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
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Côte M, Nicholls T, Knight DW, Morgan IR, Rogueda PGA, King SM, Heenan RK, Griffiths PC. Self-assembling chiral gelators for fluorinated media. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:8678-8684. [PMID: 19402688 DOI: 10.1021/la804277z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Formulations involving partially and fully fluorinated media represent a technological challenge given the lipophobic and hydrophobic nature of such liquids. The identification of self-associating materials with which to control the viscosity and solubilizing characteristics of fluorinated solvents is a particularly interesting area of research. It is shown here that the presence of the stereogenic centers inherent in a family of bis-(alpha,beta-dihydroxy ester)s is an essential requirement for the thermoreversible gelation of mixtures of partially fluorinated liquids 2H,3H-perfluoropentane (HPFP) and 1H,1H-heptafluorobutanol (HFB). Gelation is driven by hydrogen bonding, which induces a nonpreferred conformation around the bis-(alpha,beta-dihydroxy ester) structural motif. An analysis of the melting temperature yields an enthalpy of melting that is consistent with three to four hydrogen bonds, commensurate with the end-group structure of the gelator. Small-angle neutron scattering demonstrated the existence of the common fibrillar structures whose dimensions showed no obvious correlation with the molecular structure of the gelator.
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Affiliation(s)
- Marie Côte
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
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Borges AR, Hyacinth M, Lum M, Dingle CM, Hamilton PL, Chruszcz M, Pu L, Sabat M, Caran KL. Self-assembled thermoreversible gels of nonpolar liquids by racemic propargylic alcohols with fluorinated and nonfluorinated aromatic rings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:7421-7431. [PMID: 18553992 DOI: 10.1021/la800201d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The synthesis and colloidal study of a new class of low molecular weight organogelators is reported. Racemic propargylic alcohols with perfluoroaryl and nonfluorinated aryl rings are capable of forming gels in alkane liquids and/or silicone oil. A full colloidal characterization of alkane gels prepared from (R/S)-1-pentafluorophenyl-3-phenylprop-2-yn-1-ol [(R/S)- 1] was conducted, including both structural [optical microscopy, scanning electron microscopy (SEM), powder X-ray diffraction (XRD), attenuated total reflectance infrared spectroscopy (ATR-IR)] and thermal stability [differential scanning calorimetry (DSC)] studies. A model of the organization of gelator molecules within gel fibers has been proposed primarily based on the correlation of diffraction data for the powder XRD pattern of a gel and a simulated powder pattern from a sublimed crystal of the gelator. Furthermore, structural requirements for propargylic alcohol gelators were investigated by subjecting derivatives with modified structures to gelation tests. An enantiomerically enriched sample [(R)- 1, 83% ee] fails to entrap the solvent under conditions where the racemate successfully forms a gel. The remaining racemic derivatives (with p-alkoxy or p-alkyl substituents on the nonfluorinated arene) form gels or partial gels in silicone oil and in some alkane preparations.
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Affiliation(s)
- Ashleigh R Borges
- Department of Chemistry and Biochemistry, James Madison University, Harrisonburg, Virginia 22807, USA
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