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Search for "neutron scattering" in Full Text gives 8 result(s) in Beilstein Journal of Organic Chemistry.
Aggregation behaviour of a single-chain, phenylene-modified bolalipid and its miscibility with classical phospholipids
Beilstein J. Org. Chem. 2017, 13, 995–1007, doi:10.3762/bjoc.13.99
- was studied as a function of temperature using transmission electron microscopy (TEM), differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR) spectroscopy, and small angle neutron scattering (SANS). We show that our new bolalipid self-assembles into nanofibres, which transform into
- neutron scattering (SANS). Moreover, the mixing behaviour of PC-C18pPhC18-PC with saturated phosphatidylcholines 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), DPPC, and 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) was studied by means of DSC and TEM. Additionally, one mixture was exemplarily
- °C. After an equilibration time of 8 min, 64 scans were recorded and accumulated. The corresponding spectra of the solvent (H2O or D2O) were subtracted from the sample spectra using the OPUS software supplied by Bruker. Small angle neutron scattering (SANS) SANS measurements were made on the steady
Interactions between shape-persistent macromolecules as probed by AFM
Beilstein J. Org. Chem. 2017, 13, 938–951, doi:10.3762/bjoc.13.95
- structure factor S(0) (interaction among polymer chains) as M × S(0) = Mapp and Δρm is the difference in neutron scattering length density between polymer and solvent normalized to the density of polymer. The local structure of the polymer cylindrical cross-section was extracted by applying indirect Fourier
- adamantane connectors. Small-angle neutron scattering and X-ray experiments reveal the presence of stiff cylindrical polymer chains with contour lengths of about 13–16 nm, which corresponds to the values obtained by MALDI and AFM measurements. Hard substrates with the shape-persistent polymers and
- starting materials. Neutron scattering experiments performed at the KWS-1 instrument operated by the Jülich Centre for Neutron Science (JCNS) at the Heinz Maier-Leibnitz Zentrum (MLZ), Garching, Germany. The support of Clement Blanchet (EMBL) is kindly acknowledged. This work benefited from the use of the
Anomalous diffusion of Ibuprofen in cyclodextrin nanosponge hydrogels: an HRMAS NMR study
Beilstein J. Org. Chem. 2014, 10, 2715–2723, doi:10.3762/bjoc.10.286
- may, in principle, alter the structure of the polymeric network. We are currently investigating this aspect by small angle neutron scattering (SANS) on gels at variable and controlled pH. The data collected at the Heinz Maier-Leibnitz large scale facility (Munich, Germany, KWS-2 spectrometer) are
Supercritical carbon dioxide: a solvent like no other
Beilstein J. Org. Chem. 2014, 10, 1878–1895, doi:10.3762/bjoc.10.196
- observed to have low water-CO2 interfacial tensions (Table 1, compounds 8 and 9). The presence of reversed micelles was also confirmed with small-angle neutron scattering (SANS) where the w value = 0, although phase separation occurred immediately upon water addition [59]. SANS is a non-invasive technique
- that utilizes elastic neutron scattering at small scattering angles in order to investigate internal sample structure over length scales of ~10 Å–1000 Å. It is used extensively in the field of colloid science due to the ability to identify a range of internal structures, as well as having the capacity
Cyclic phosphonium ionic liquids
Beilstein J. Org. Chem. 2014, 10, 271–275, doi:10.3762/bjoc.10.22
- chains. This topic merits further exploration via molecular dynamics simulations [28] and physical studies such as NMR diffusion measurements, nuclear Overhauser effect spectroscopies, and quasi-elastic neutron scattering. As seen for instance for the cyclic ammonium salts, the viscosities of the cyclic
Influence of intramolecular hydrogen bonds on the binding potential of methylated β-cyclodextrin derivatives
Beilstein J. Org. Chem. 2012, 8, 1890–1895, doi:10.3762/bjoc.8.218
- . This negative value is quite normal and attributed to the liberation of bound water molecules from the cavity, while the entropy of the host remains more or less unchanged [5][6]. Neutron scattering studies revealed that native β-CD is strongly rigidified by intermolecular hydrogen bonds (flip-flop
Gelation or molecular recognition; is the bis-(α,β-dihydroxy ester)s motif an omnigelator?
Beilstein J. Org. Chem. 2010, 6, 1079–1088, doi:10.3762/bjoc.6.123
- 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
- research. Keywords: gelation; inelastic neutron spectroscopy; low molar mass organogelator; neutron scattering; neutron spin-echo scattering; self-assembly; Introduction A detailed, molecular level understanding of the fundamental aspects of the spontaneous self-assembly and network formation of low
Chain stopper engineering for hydrogen bonded supramolecular polymers
Beilstein J. Org. Chem. 2010, 6, 869–875, doi:10.3762/bjoc.6.102
- associated, whereas the bis-thiourea is virtually not associated. The respective behaviour of the bis-urea and the bis-thiourea was also probed by Small Angle Neutron Scattering (SANS) in toluene. Figure 4 shows the previously established q−1 dependence of EHUT, which is characteristic for long and rigid
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