Dielectric properties of a bisimidazolium salt with dodecyl sulfate anion doped with carbon nanotubes

• Doina Manaila Maximean,
• Viorel Cîrcu and
• Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 164–174, doi:10.3762/bjnano.9.19

• , yielded the corresponding salt [bisC8ImC10][C12H25OSO3]2 (3). Compound 3 was characterized by several physico-chemical techniques, such as elemental analysis (C, H, N), IR, 1H and 13C NMR spectroscopy, supporting the proposed structure. The exchange of bromide anion with dodecyl sulfate ion was easily

The rational design of a Au(I) precursor for focused electron beam induced deposition

• Ali Marashdeh,
• Thiadrik Tiesma,
• Niels J. C. van Velzen,
• Sjoerd Harder,
• Remco W. A. Havenith,
• Jeff T. M. De Hosson and
• Willem F. van Dorp

Beilstein J. Nanotechnol. 2017, 8, 2753–2765, doi:10.3762/bjnano.8.274

• described in [12]. The products were analyzed by C and H elemental analysis and showed satisfactory values. MeAu(PMe3), anal. calcd for C4H12PAu: C, 16.68; H, 4.20; found: C, 17.15; H, 4.26. Samples were also analyzed by 1H and 31P NMR spectroscopy. MeAu(PMe3): 1H NMR (400 MHz, C6D6, 25 °C) δ 1.20 (d, 3JHP

The interplay between spin densities and magnetic superexchange interactions: case studies of mono- and trinuclear bis(oxamato)-type complexes

• Azar Aliabadi,
• Bernd Büchner,
• Vladislav Kataev and
• Tobias Rüffer

Beilstein J. Nanotechnol. 2017, 8, 2245–2256, doi:10.3762/bjnano.8.224

• sensitivity than NMR spectroscopy. One possibility to investigate the electron spin density by ESR is, as nicely described in [33], the fabrication of single crystals composed of the paramagnetic complex of interest co-crystallized in the host lattice of a corresponding and structural analogous diamagnetic

Carbon nano-onions as fluorescent on/off modulated nanoprobes for diagnostics

• Stefania Lettieri,
• Marta d’Amora,
• Adalberto Camisasca,
• Alberto Diaspro and
• Silvia Giordani

Beilstein J. Nanotechnol. 2017, 8, 1878–1888, doi:10.3762/bjnano.8.188

• −1. The CNO samples were sonicated for an additional 20 min and the particle size was measured. Zeta potential measurements were performed on the same apparatus using the disposable zeta potential cuvettes. NMR spectroscopy NMR spectroscopy was performed on a Bruker Avance III 400 MHz system (400.13

Application of visible-light photosensitization to form alkyl-radical-derived thin films on gold

• Rashanique D. Quarels,
• Xianglin Zhai,
• Neepa Kuruppu,
• Jenny K. Hedlund,
• Ashley A. Ellsworth,
• Amy V. Walker,
• Jayne C. Garno and
• Justin R. Ragains

Beilstein J. Nanotechnol. 2017, 8, 1863–1877, doi:10.3762/bjnano.8.187

• purification. 1H and 13C NMR spectroscopy was performed on a Bruker AV-400 spectrometer. Glassware was flame-dried under vacuum and backfilled with dry nitrogen prior to use. Acetonitrile for thin film deposition procedures was purified according to the method published by Pangborn et al. [51]. Deuterated

Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization

• Mohamed Hamed Misbah,
• Mercedes Santos,
• Luis Quintanilla,
• Christina Günter,
• Matilde Alonso,
• Andreas Taubert and
• José Carlos Rodríguez-Cabello

Beilstein J. Nanotechnol. 2017, 8, 772–783, doi:10.3762/bjnano.8.80

• NMR spectroscopy. 4 ELR-gel formation ELR-cyclooctyne and ELR-azide samples were dissolved separately in ultrapure water at 4 °C and 50 mg/mL each. Then, 500 µL of each solution was mixed in a cylindrical mold for one hour at 4 °C (since the chains are more soluble at this temperature, and therefore

• dispensed onto the MALDI plate along with 1 μL of aqueous ELR solution. The plate was dried in air and mass spectra were recorded using a Bruker autoflex speed instrument with a nitrogen laser (337 nm) operating in positive ion mode with delayed extraction. 6.2 Nuclear magnetic resonance (NMR) spectroscopy

• 1H NMR spectroscopy was performed using an Agilent 400 MHz spectrometer (Agilent technologies) equipped with an Agilent MR console 400 and one NMR probe. For NMR experiments, 15–20 mg of the ELR sample was dissolved in 600 µL deuterated dimethyl sulfoxide (DMSO-d6). Chemical shifts (δ) are given in

First examples of organosilica-based ionogels: synthesis and electrochemical behavior

• Andreas Taubert,
• Ruben Löbbicke,
• Barbara Kirchner and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2017, 8, 736–751, doi:10.3762/bjnano.8.77

• sulfonate groups, but also to amino groups of the linker and on to other sulfonates from there. This effect may contribute to the rather efficient conduction but the details are currently under investigation using solid-state NMR spectroscopy. The hypothesis of very mobile protons is however qualitatively

α-((4-Cyanobenzoyl)oxy)-ω-methyl poly(ethylene glycol): a new stabilizer for silver nanoparticles

• Jana Lutze,
• Miguel A. Bañares,
• Marcos Pita,
• Andrea Haase,
• Andreas Luch and
• Andreas Taubert

Beilstein J. Nanotechnol. 2017, 8, 627–635, doi:10.3762/bjnano.8.67

• function of the pH value both for the free stabilizer and for the polymers bound to the surface of the silver nanoparticles using 1H NMR spectroscopy and zeta potential measurements. The polymer shows a high stability between pH 3 and 9. At pH 12 and higher the polymer coating is degraded over time

• synthesis, that is, no dilution or other sample processing was performed prior to Raman analysis. NMR spectroscopy. 1H NMR spectra were recorded on a Bruker Avance 300 MHz or 500 MHz spectrometer in D2O with TMS as an internal standard. Light scattering and zeta potential. The hydrodynamic diameter Rh and

• , and 12 at 37 °C for 24 h. After different time intervals, aliquots were taken and the samples were directly investigated using 1H NMR spectroscopy (Figure 3). At pH 3, 6, and 9 no significant change of the polymer was observed and all NMR spectra indicate that CBAmPEG remains intact over the

Liquid permeation and chemical stability of anodic alumina membranes

• Dmitrii I. Petukhov,
• Dmitrii A. Buldakov,
• Alexey A. Tishkin,
• Alexey V. Lukashin and
• Andrei A. Eliseev

Beilstein J. Nanotechnol. 2017, 8, 561–570, doi:10.3762/bjnano.8.60

• permeance occurred. The permeate solution also contained dissolved aluminum (Table 1). Alumina dissolution from the pore walls was also proved by 27Al solid state NMR spectroscopy of initial membranes and membranes after 500 L/m2 pure water filtration. The spectra for initial membrane AAO_40V was obtained

Association of aescin with β- and γ-cyclodextrins studied by DFT calculations and spectroscopic methods

• Ana I. Ramos,
• Pedro D. Vaz,
• Susana S. Braga and
• Artur M. S. Silva

Beilstein J. Nanotechnol. 2017, 8, 348–357, doi:10.3762/bjnano.8.37

• , water content of ca. 14% for β-CD and 9% for γ-CD) were kindly donated by Ashland Specialty Ingredients (Düsseldorf, Germany). All other materials and solvents were of analytical reagent grade. NMR spectroscopy One- and two-dimensional NMR spectra were recorded on a Bruker Avance 500 spectrometer at

Tailoring bifunctional hybrid organic–inorganic nanoadsorbents by the choice of functional layer composition probed by adsorption of Cu²⁺ ions

• Veronika V. Tomina,
• Inna V. Melnyk,
• Yuriy L. Zub,
• Aivaras Kareiva,
• Miroslava Vaclavikova,
• Gulaim A. Seisenbaeva and
• Vadim G. Kessler

Beilstein J. Nanotechnol. 2017, 8, 334–347, doi:10.3762/bjnano.8.36

• surface layers were analyzed by diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy, and 13C and 29Si solid-state NMR spectroscopy revealing their composition and organization. The fine chemical structure of the surface in the produced hybrid adsorbent particles and the ligand distribution

• /APTES molar ratio of 3:1, the surface layer did contain amino groups (1.56 mmol/g), but the particle size decreases to about 9 nm. When the order of components introduction was changed, the content of functional groups increased to 3.2 mmol/g. However, according to 29Si NMR spectroscopy, the content of

• contained water (DRIFT analysis in Supporting Information File 1). Solid-state CP/MAS NMR spectroscopy, especially 13C and 29Si NMR spectroscopy, has been widely used to study silica materials, it can provide information about hydrolysis and condensation processes. Clearly, hydrolysis and polycondensation

Selective photodissociation of tailored molecular tags as a tool for quantum optics

• Ugur Sezer,
• Philipp Geyer,
• Moritz Kriegleder,
• Maxime Debiossac,
• Armin Shayeghi,
• Markus Arndt,
• Lukas Felix and
• Marcel Mayor

Beilstein J. Nanotechnol. 2017, 8, 325–333, doi:10.3762/bjnano.8.35

• before the reaction mixture was warmed up to 50 °C for 12 h. Aqueous work-up and recrystallization of the crude reaction product from chloroform provided the target compound 1 in 80% yield as colourless solid. All new compounds were fully characterized by 1H, 19F and 13C NMR spectroscopy and high

• of the target trimer 1 by NMR spectroscopy to be able to analyse the products of the photodegradation. Due to the poor solubility of the trimer 1, these studies were made with the monomeric building block 4, which allowed for suitable concentrations in dichloromethane-d2 for the NMR experiment. In a

Nanoscale isoindigo-carriers: self-assembly and tunable properties

• Tatiana N. Pashirova,
• Andrei V. Bogdanov,
• Lenar I. Musin,
• Julia K. Voronina,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Vladimir F. Mironov,
• Lucia Ya. Zakharova,
• Shamil K. Latypov and
• Oleg G. Sinyashin

Beilstein J. Nanotechnol. 2017, 8, 313–324, doi:10.3762/bjnano.8.34

• NMR spectroscopy NMR experiments were performed with a 500 MHz (500 MHz for 1H NMR; 125 MHz for 13C NMR; 50.7 MHz for 15N NMR, respectively) spectrometer equipped with a 5 mm diameter gradient direct broad band probehead and a pulsed gradient unit capable of producing magnetic field pulse gradients in

Photocatalysis applications of some hybrid polymeric composites incorporating TiO₂ nanoparticles and their combinations with SiO₂/Fe₂O₃

• Andreea Laura Chibac,
• Tinca Buruiana,
• Violeta Melinte and
• Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

• . Characterization The structure of PTHF-UDMA monomer was confirmed by 1H NMR spectroscopy using a Bruker Avance DRX 400 spectrometer. The viscosity of PTHF-UDMA monomer was measured with a rotational viscometer RM 100 Touch (Lamy Rheology Instruments, France) using a cone/plate set up (2° cone angle, 40 mm diameter

Intercalation and structural aspects of macroRAFT agents into MgAl layered double hydroxides

• Dessislava Kostadinova,
• Ana Cenacchi Pereira,
• Muriel Lansalot,
• Franck D’Agosto,
• Elodie Bourgeat-Lami,
• Fabrice Leroux,
• Christine Taviot-Guého,
• Sylvian Cadars and
• Vanessa Prevot

Beilstein J. Nanotechnol. 2016, 7, 2000–2012, doi:10.3762/bjnano.7.191

• for 5 h and the obtained polymers were purified by precipitation in diethyl ether. Samples were taken during polymerization to determine conversion by 1H NMR spectroscopy as a function of time, and molar mass evolution with conversion by size exclusion chromatography (SEC). SEC measurements were

Phenalenyl-based mononuclear dysprosium complexes

• Yanhua Lan,
• Andrea Magri,
• Olaf Fuhr and
• Mario Ruben

Beilstein J. Nanotechnol. 2016, 7, 995–1009, doi:10.3762/bjnano.7.92

• distilled THF, anhydrous starting materials and oven-dried glassware. So far, single crystals of the complex 4 were not obtained, thus its exact structure remains unknown yet. Nevertheless, the product was fully characterized by NMR spectroscopy, mass spectrometry and UV–vis spectrophotometry in comparison

Characterisation of thin films of graphene–surfactant composites produced through a novel semi-automated method

• Nik J. Walch,
• Alexei Nabok,
• Frank Davis and
• Séamus P. J. Higson

Beilstein J. Nanotechnol. 2016, 7, 209–219, doi:10.3762/bjnano.7.19

• bromide (CTAB). The formation of individual graphene flakes was confirmed by Raman spectroscopy, while the interaction of graphene with surfactants was proven by NMR spectroscopy. The resulting graphene–surfactant composite material formed a stable suspension in water and some organic solvents, such as

• wavelength of 650 nm was determined and the Beer–Lambert law applied, using an extinction coefficient of 13.9 mg·mL−1·cm−1 [7]. The interaction of the surfactant with the graphene surface was also analysed using NMR spectroscopy. Dried graphene–surfactant complex was dissolved in D2O and placed into an NMR

• running topspin analysis software. This analysis works according to the nuclear Overhauser effect (NOE). The NOE, which is present in nuclear magnetic resonance (NMR) spectroscopy, can be used to determine the amount of contact between the surfactant and the graphene sheet. This is achieved by observing

pH-Triggered release from surface-modified poly(lactic-co-glycolic acid) nanoparticles

• Manuel Häuser,
• Klaus Langer and
• Monika Schönhoff

Beilstein J. Nanotechnol. 2015, 6, 2504–2512, doi:10.3762/bjnano.6.260

• release of PDADMAC is concluded from 1H NMR spectroscopy. Although 1H NMR spectroscopy lacks sensitivity, it has significant advantages with respect to selectivity and robustness compared to current state of the art analytical methods, such as chromatography and titration strategies [28], which are

• PDADMAC To probe pH-tunability after adsorption of the second PAA layer, a titration experiment using HCl (25 mM) was carried out, as described in the Experimental section. PDADMAC desorption was monitored by quantitative 1H NMR spectroscopy, using an external standard of resorcinol in D2O as a reference

• of the initial dispersion was derived from the weight of the solids content. Nuclear magnetic resonance (NMR) spectroscopy: 1H NMR experiments were performed using a 400 MHz Avance spectrometer (Bruker, Rheinstetten, Germany). All measurements were carried out at room temperature (295 K) and all

Light-powered, artificial molecular pumps: a minimalistic approach

• Giulio Ragazzon,
• Massimo Baroncini,
• Serena Silvi,
• Margherita Venturi and
• Alberto Credi

Beilstein J. Nanotechnol. 2015, 6, 2096–2104, doi:10.3762/bjnano.6.214

• molecular axle 1H+ (Figure 4) was thus synthesized, and the photoinduced transit of the dibenzo-24-crown-8 ether 2 was investigated in acetonitrile at room temperature by steady state and time-resolved 1H NMR spectroscopy and UV–vis absorption experiments [32]. The kinetic measurements demonstrated that the

Charge carrier mobility and electronic properties of Al(Op)₃: impact of excimer formation

• Andrea Magri,
• Pascal Friederich,
• Bernhard Schäfer,
• Valeria Fattori,
• Xiangnan Sun,
• Timo Strunk,
• Velimir Meded,
• Luis E. Hueso,
• Wolfgang Wenzel and
• Mario Ruben

Beilstein J. Nanotechnol. 2015, 6, 1107–1115, doi:10.3762/bjnano.6.112

• experimental data. Results Al(Op)3 was synthesized as previously described [23]. To confirm the purity of the complex, proton and carbon nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS) were carried out and compared with the data reported in previous work [16]. Initially, in order to

Microwave assisted synthesis and characterisation of a zinc oxide/tobacco mosaic virus hybrid material. An active hybrid semiconductor in a field-effect transistor device

• Shawn Sanctis,
• Rudolf C. Hoffmann,
• Sabine Eiben and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2015, 6, 785–791, doi:10.3762/bjnano.6.81

• was employed to synthesize stable zinc oxide (ZnO) nanoparticles, employing a molecular precursor. Insightful studies of the decomposition of the precursor were done using NMR spectroscopy and material characterization of the hybrid material derived from the decomposition was achieved using dynamic

• 13C NMR spectroscopy. Without the addition of the base, the precursor complex did not undergo any decomposition after the completion of the microwave reaction under typical reaction conditions. However, in the presence of the base, the precursor does undergo decomposition with appearance of a

• materials with functional properties that can be implemented into future device applications. Schematic representation of the microwave decomposition pathway of the zinc oximato precursor in the presence of TEAOH as a base based on NMR spectroscopy. Note that the water ligands are omitted in the starting

Chemoselective silicification of synthetic peptides and polyamines

• Maryna Abacilar,
• Fabian Daus and
• Armin Geyer

Beilstein J. Nanotechnol. 2015, 6, 103–110, doi:10.3762/bjnano.6.10

• present experiments which quantify the additivity, and potential cooperativity of long chain polyamines (LCPAs) and cationic peptides in the silicification process. Keywords: biomineralisation; biosilicification; NMR spectroscopy; polyamines; silaffin; Introduction Modifications of the Stöber method [1

Electrostatic interplay: The interaction triangle of polyamines, silicic acid, and phosphate studied through turbidity measurements, silicomolybdic acid test, and ²⁹Si NMR spectroscopy

• Anne Jantschke,
• Katrin Spinde and
• Eike Brunner

Beilstein J. Nanotechnol. 2014, 5, 2026–2035, doi:10.3762/bjnano.5.211

• studied in order to visualize the possible influence of hydrophobic interactions. For 29Si NMR spectroscopy aqueous solutions of isotope-labelled sodium [29Si] metasilicate as precursor compound were used. Different silica precursors, such as toxic TMOS (tetramethyl orthosilicate) or TEOS (tetraethyl

• oligomers/silica nanoparticles below the pKa of PAH. The resulting immobilization of higher silicic acid oligomers could indeed be observed by 29Si NMR spectroscopy previously [23]. The soluble silica (mono- and disilicic acid) is almost completely polycondensed into insoluble species (higher silica

Carbon nano-onions (multi-layer fullerenes): chemistry and applications

• Juergen Bartelmess and
• Silvia Giordani

Beilstein J. Nanotechnol. 2014, 5, 1980–1998, doi:10.3762/bjnano.5.207

• product was well soluble in common organic solvents such as ethanol, chloroform and dichloromethane. Evidence for a successful CNO functionalization was derived from 1H NMR spectroscopy, MALDI mass spectrometry and elemental analysis. TEM suggested that the individual CNOs had diameters between 60 and 300

• , the authors estimated that approximately one pyridine functionality per 120 CNO surface carbon atoms was present. The pyridine groups were then decorated with Zn-tetraphenylporphyrin (ZnTPP) what was confirmed by NMR spectroscopy and electrochemistry. No further spectroscopic studies were carried out

• well as Raman spectroscopy were used to verify the successful alkylation of the CNOs. It was reported that the CNO-C16 exhibits an outstanding solubility in a multitude of organic solvents, even in high concentrations of up to 0.1 mg·mL−1. This high solubility enabled the use of 1H NMR spectroscopy

Visible light photooxidative performance of a high-nuclearity molecular bismuth vanadium oxide cluster

• Johannes Tucher and
• Carsten Streb

Beilstein J. Nanotechnol. 2014, 5, 711–716, doi:10.3762/bjnano.5.83

• proposed as a transient species with short lifetime using 51V NMR spectroscopy [46]. In the present case, the anion is electrostatically stabilized by four bismuth(III) ions which coordinate to binding pockets formed on the cluster surface, see Scheme 1. Initial photocatalytic studies using the