11 article(s) from Wenz, Gerhard
- Full Research Paper
- Published 03 Jul 2017
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Scheme 1: Synthesis route of RAMEB based statistical polyrotaxane.
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Figure 1: (a) GPC trace of the polyHEMA-co-polyisoprene polyrotaxane 1 and (b) 500 MHz 1H NMR and DOSY spectr...
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Scheme 2: Schematic representation of the synthetic procedure for the preparation of randomly methylated β-CD...
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Figure 2: (a) GPC traces of the macroCTA 5 (solid line) and the poly(TRIS-AAm)-b-polyisoprene-b-poly(TRIS-AAm...
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- Full Research Paper
- Published 18 May 2017
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Figure 1: Interaction of a shape-persistent CD polymer with ditopic guests.
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Figure 2: Schematic representation of tip and surface modifications realized in this study (bottom). Blue lin...
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Scheme 1: Synthesis of the CD polymer. a) conc. HNO3, reflux, 6 d; b) tert-butanol, cat. H2SO4, MgSO4, CH2Cl2...
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Figure 3: Absorption spectra of monomer 7 (solid red line) and polymer 8 (solid blue line) in water. Emission...
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Figure 4: Positive linear MALDI–TOF spectrum of polymer 8 using HABA/TMG2 matrix.
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Figure 5: SANS data for polymer 8 and fit by cylindrical model (solid line).
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Scheme 2: Ditopic and monotopic guest molecules.
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Figure 6: Solubility of polymer 8 in the presence of ditopic connector 9 (black graph) and 1-aminoadamantane ...
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Scheme 3: Synthesis of amino functionalized polymer 12.
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Figure 7: Characteristic force curves recorded during retraction of the AFM tip from the surface. Four functi...
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Figure 8: Graphical summary of experimental results for the four configurations of CD attachment introduced i...
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Figure 9: (a) Detail of the end of a force curve for a polymer-functionalized tip retracted from a polymer-fu...
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Figure 10: Characteristic result of a friction experiment for a polymer-functionalized tip sliding on a surfac...
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- Full Research Paper
- Published 19 Dec 2014
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Scheme 1: Synthesis of azido functionalized DIMEB 1a. a) Ba(OH)2·8H2O/BaO/Me2SO4
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Figure 1: ESI mass spectrum of azido functionalized DIMEB 1a.
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Figure 2: 1H NMR spectra of a) 1a, b) 2, and c) 5a.
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Scheme 2: Synthesis of propargylated HES 2.
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Scheme 3: Synthesis of 5a by [2 + 3] cycloadditon, a) CuSO4, ascorbate, 50 °C, 48 h.
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Figure 3: Viabilities of Caco-2 cells incubated with a) 5a after 2 h, b) 5a after 24 h, c) DIMEB after 2 h, d...
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Scheme 4: Structures of a) midazolam and b) sevoflurane.
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- Full Research Paper
- Published 09 Dec 2014
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Scheme 1: Synthetic route to neutral water-soluble CD thioethers.
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Figure 1: ESI MS spectra of CD derivatives 2b1 (left) and 3b1 (right).
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Figure 2: 1H NMR spectra of a) the statistical CD derivatives 2b1 and b) the corresponding uniform derivative ...
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Figure 3: Transmission (λ = 670 nm) of aqueous solutions (1.0 wt %) of 2b1 (red) and 3b1 (blue).
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Figure 4: Decay of the relative vapour pressure A/A0 as function of the host concentration 3b1 measured by GC...
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- Published 12 Sep 2013
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Figure 1: Chemical structures of selected aromatic guests: anthracene, ANT; acenaphthylene, ACE; and coumarin...
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Figure 2: Structures of γ-CD and γ-CD thioethers 1–7.
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Scheme 1: Photodimerization of ACE.
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Figure 3: 1H NMR spectrum of the photo product of ACE in the presence of γ-CD thioether 3 in CDCl3.
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Figure 4: Schematic drawing of the ACE photodimers in γ-CD: a) the syn photodimer and b) the anti photodimer....
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Figure 5: Structures of COU photodimers.
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Figure 6: Partial 1H NMR of the photodimers formed after irradiation of COU at various concentrations of Na2SO...
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- Full Research Paper
- Published 19 Jun 2013
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Figure 1: Chemical structures of β-CD 1, hydroxypropyl-β-CD 2, and β-CD-thioethers 3 and 4.
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Figure 2: Chemical structures of the benzene and cyclohexane derivatives, with their calculated molecular vol...
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Figure 3: Chromatogram obtained by HS-GC for a mixture of aromatic guests (1 ppm) in water (black) and 10 mM ...
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Figure 4: Gibbs free energy of formation of the inclusion compound of benzene derivatives, and cyclohexane de...
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Figure 5: Gibbs free energy of formation of the inclusion compounds of benzene and cyclohexane derivatives in...
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Figure 6: Gibbs free energy of formation of the inclusion compounds of benzene derivatives in host 4 as a fun...
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Figure 7: Free binding enthalpy for benzene, toluene, ethylbenzene, cumene, and tert-butylbenzene, in host 4 ...
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- Full Research Paper
- Published 06 Nov 2012
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Figure 1: Structures of the methylated β-CD derivatives investigated.
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Figure 2: Temperature dependence of −TΔS°, ΔH° and ΔG° for the inclusion of 1-adamantane carboxylate in hepta...
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Figure 3: Structural drawing of β-CD [43], according to structural data (CSD-ID BUVSEQ03) from Zabel et al. [38], gen...
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- Full Research Paper
- Published 28 Sep 2012
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Figure 1: Space-filling model of the most stable complex between γ-CD and C60 with 1:2 stoichiometry, calcula...
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Scheme 1: Chemical structures of γ-CD and γ-CD thioether 1–7 used to solubilize C60 in water.
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Figure 2: UV–vis spectra of (a) C60 solution in THF, (b) aqueous solutions of C60 with 6 mM γ-CD thioether 5 ...
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Figure 3: Isothermal kinetics of the dissolution of C60 in the presence of 10 mM CD 7 in water. Curve: best f...
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Scheme 2: Mechanistic description of the two possible mechanisms for the complexation of C60 (G) by CD hosts,...
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Figure 4: Phase-solubility diagram of C60 in aqueous solution in the presence of CD 3.
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Figure 5: UV–vis spectra of the water solution of C60 produced by stirring C60 in 6mM γ-CD solution in DMF/to...
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Figure 6: Size distribution of the molecular solution of C60 with 6 mM CD 5 in water at 25.0 °C: before centr...
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Figure 7: Size distributions of the aqueous C60 dispersions after filtration, produced by stirring C60 in 6mM...
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