Conformational switching of ethano-bridged Cu,H₂-bis-porphyrin induced by aromatic amines

• Simona Bettini,
• Emanuela Maglie,
• Rosanna Pagano,
• Victor Borovkov,
• Yoshihisa Inoue,
• Ludovico Valli and
• Gabriele Giancane

Beilstein J. Nanotechnol. 2015, 6, 2154–2160, doi:10.3762/bjnano.6.221

• ], allowing realization of thin film devices with variable physical and chemical properties upon complexation with guest molecules [5][6][7]. One of the most appealing classes of porphyrins is the bis-porphyrins, which can switch their conformational form as a result of the interaction with specific guest

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

• stability of the ring–axle complexes in the two isomeric forms (K1 > K3). Furthermore, detailed measurements showed that for specific irradiation wavelengths, the photoisomerization efficiency is affected by complexation, namely, the photoreactivity of the axle depends on whether it is surrounded by the

Mammalian cell growth on gold nanoparticle-decorated substrates is influenced by the nanoparticle coating

• Christina Rosman,
• Sebastien Pierrat,
• Marco Tarantola,
• David Schneider,
• Eva Sunnick,
• Andreas Janshoff and
• Carsten Sönnichsen

Beilstein J. Nanotechnol. 2014, 5, 2479–2488, doi:10.3762/bjnano.5.257

• cytotoxic [11] causing complexation of nucleic acids as well as protein/polysaccharide aggregation. These cytotoxic effects of CTAB clearly emerge in the proliferation, since after three days of incubation, nearly all cells stopped spreading while about 40% of the starting cells remained adherent. Here

• , cell adherence alone was not an adequate marker of cell viability, because due to the complexation properties of CTAB, the outer cell structure might have been fixed by the surfactant, which preserved the shape, while proliferation was prohibited. In order to have a reliable measure on viability, a

In situ metalation of free base phthalocyanine covalently bonded to silicon surfaces

• Fabio Lupo,
• Cristina Tudisco,
• Federico Bertani,
• Enrico Dalcanale and
• Guglielmo G. Condorelli

Beilstein J. Nanotechnol. 2014, 5, 2222–2229, doi:10.3762/bjnano.5.231

• metalated in situ with Co by using wet chemistry. The efficiency of the metalation process was evaluated by XPS measurements and, in particular, on porous silicon, the complexation of cobalt was confirmed by the disappearance in the FTIR spectra of the band at 3290 cm−1 due to –NH stretches. Finally, XPS

• Co(II) compounds such as CoCl2 (Figure 4c) indicate that Co signal is not due to physisorbed CoCl2. The observed band shape and position are consistent with spectra reported for Co-phthalocyanine thin films [33][34][35]. In addition, complexation efficiency was estimated from the N/Co atomic ratio

• determined through XPS. Considering a theoretical N/Co ratio of 8 expected for 100% of complexation, N/Co ratios obtained for Si-Co-Pc and PSi-Co-Pc (28.6 and 10.7, respectively) indicate a percentage of metalation of 28% and 75%, respectively. Further indication of Co complexation in the Pc-ring was

Towards bottom-up nanopatterning of Prussian blue analogues

• Virgile Trannoy,
• Marco Faustini,
• David Grosso,
• Sandra Mazerat,
• François Brisset,
• Alexandre Dazzi and
• Anne Bleuzen

Beilstein J. Nanotechnol. 2014, 5, 1933–1943, doi:10.3762/bjnano.5.204

• ) the grafting of the anchoring function for PBA growth and ii) the adsorption of any of the PBA precursors or PBA particles; - a low yield of the complexation reaction of the Co2+ ions by the anchoring functions grafted onto the bottom of the nanoperforations; - the occurrence of dissolution

Non-covalent and reversible functionalization of carbon nanotubes

• Antonello Di Crescenzo,
• Valeria Ettorre and
• Antonella Fontana

Beilstein J. Nanotechnol. 2014, 5, 1675–1690, doi:10.3762/bjnano.5.178

• the polymer conformation from a wrapping to an unwrapping state [98]. Shiraki et al. have shown that NIR laser irradiation coagulates a modified helical polysaccharide/SWCNT complex [99]. Recently, a UV-responsive supra-amphiphile based on the host–guest complexation of a water-soluble pillar[6]arene

The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands

• Edwin J. Devid,
• Paulo N. Martinho,
• M. Venkata Kamalakar,
• Úna Prendergast,
• Christian Kübel,
• Tibebe Lemma,
• Jean-François Dayen,
• Tia. E. Keyes,
• Bernard Doudin,
• Mario Ruben and
• Sense Jan van der Molen

Beilstein J. Nanotechnol. 2014, 5, 1664–1674, doi:10.3762/bjnano.5.177

• . The observed spatial flexibility of the thiol-anchored BPP ligands is of interest for molecule chelation purposes, as it should facilitate the envisioned complexation of Fe(II) metal ions. Conductance measurements on a multilayered Au-NP–S-BPP network Charge transport in Au-NP–S-BPP network devices

Mimicking exposures to acute and lifetime concentrations of inhaled silver nanoparticles by two different in vitro approaches

• Fabian Herzog,
• Kateryna Loza,
• Sandor Balog,
• Martin J. D. Clift,
• Matthias Epple,
• Peter Gehr,
• Alke Petri-Fink and
• Barbara Rothen-Rutishauser

Beilstein J. Nanotechnol. 2014, 5, 1357–1370, doi:10.3762/bjnano.5.149

• to many possible interactions with the inorganic and organic components, e.g., precipitation as AgCl or complexation with proteins. Experimentally, it is not possible to measure the amount of free Ag+ in such systems. However, by using a simplified system, which contains major components of

Nano-rings with a handle – Synthesis of substituted cycloparaphenylenes

• Anne-Florence Tran-Van and
• Hermann A. Wegner

Beilstein J. Nanotechnol. 2014, 5, 1320–1333, doi:10.3762/bjnano.5.145

• molecule remains challenging, mainly because of the reactive edges. As an alternative, Isobe et al. prepared a fragment of zig-zag CNT by using chrysenylene building blocks coupled via platinum complexation and reductive elimination, featuring the strategy also applied by Yamago [60]. Surprisingly, only

DFT study of binding and electron transfer from colorless aromatic pollutants to a TiO₂ nanocluster: Application to photocatalytic degradation under visible light irradiation

• Corneliu I. Oprea,
• Petre Panait and
• Mihai A. Gîrţu

Beilstein J. Nanotechnol. 2014, 5, 1016–1030, doi:10.3762/bjnano.5.115

• complexation of colloidal titanium dioxide [18]. This results in the formation of a six-atom ring with a chelating type of bonding to the same Ti(IV) ion. Similarly, the binding of the salicylic acid to titania was thought as bidentate chelate through the oxygen atoms of –OH and of –OCOH [14][20

Injection of ligand-free gold and silver nanoparticles into murine embryos does not impact pre-implantation development

• Ulrike Taylor,
• Wiebke Garrels,
• Annette Barchanski,
• Svea Peterson,
• Laszlo Sajti,
• Andrea Lucas-Hahn,
• Lisa Gamrad,
• Ulrich Baulain,
• Sabine Klein,
• Wilfried A. Kues,
• Stephan Barcikowski and
• Detlef Rath

Beilstein J. Nanotechnol. 2014, 5, 677–688, doi:10.3762/bjnano.5.80

• effects were observed after AgNP injection, silver ion dissolution seems to be either significantly reduced or the ions are deactivated after injection into the embryo. This could be caused by the aforementioned proteins, which are known to deactivate heavy metal ions by complexation. Since no such

Cyclodextrin-poly(ε-caprolactone) based nanoparticles able to complex phenolphthalein and adamantyl carboxylate

• Daniela Ailincai and
• Helmut Ritter

Beilstein J. Nanotechnol. 2014, 5, 651–657, doi:10.3762/bjnano.5.76

• phase, which may serve as an example for the uptake of a drug. The formed nanoparticles were characterized in terms of sizes and morphology by both DLS and TEM. Keywords: click reaction; complexation; cyclodextrin; encapsulation; nanoparticles; Introduction The development of new nanoscale systems for

• carboxylate complexation by the formed nanoparticles A suspension of the nanoparticles (A) was obtained as previously described. A solution of phenolphthalein in water was prepared, to which trace amounts of NaOH were added to increase the pH and obtain a pinkish solution (B). A was added to B, while stirring

• click reaction product (3) in water. with a concentration of 1% (A) and 2% (B). The color during the complexation with phenolphthalein and adamantyl carboxylate. (a) Phenolphthalein solution in water at pH > 7, (b) nanoparticles suspension added to the phenolphthalein solution, (c) nanoparticles

Continuous parallel ESI-MS analysis of reactions carried out in a bespoke 3D printed device

• Jennifer S. Mathieson,
• Mali H. Rosnes,
• Victor Sans,
• Philip J. Kitson and
• Leroy Cronin

Beilstein J. Nanotechnol. 2013, 4, 285–291, doi:10.3762/bjnano.4.31

• -house-programmed computer controller, the resulting complexation reaction can be observed with in-line ESI-MS. Because the product stream is split after the device, a section of the stream flows directly into the ESI-MS, continuously and in real time, whilst the other section of the stream is collected

• M) was then introduced to syringe pump A and complexed with ttop at flow rates of 31.25 µL·min−1 and 62.5 µL·min−1 for ttop and Cu(NO3)2·6H2O, respectively (1 equiv ttop:2 equiv Cu(NO3)2·6H2O). This complexation reaction lead to the formation and observation of the species [Cu(C24H24N6)(NO3)]+ (2

• complex is also observed here). In-house LabView scripts were then utilised to vary the metal-salt coordination. Here scripts were developed to allow the careful control of oscillating reaction mixtures (cycles) where pumps A and C were alternated to allow complexation of Ni(NO3)2·6H2O and Cu(NO3)2·6H2O

Nanoparticles of novel organotin(IV) complexes bearing phosphoric triamide ligands

• Zahra Shariatinia,
• Ebadullah Asadi,
• Vahid Tavasolinasab and
• Khodayar Gholivand

Beilstein J. Nanotechnol. 2013, 4, 94–102, doi:10.3762/bjnano.4.11

• complexation. Keywords: luminescence; nanoparticles; organotin(IV) complexes; phosphoric triamide; ultrasonic; Introduction In recent years, the increasing progress in the preparation of nanomaterials has led to characterization of a great number of nanostructures [1]. Nanoscale materials are of significance

• intensities are shown in Figures 7–12. It can be seen that the λ(max) of emission appears at 360 nm for both ligands 5 and 6 while it decreases in their corresponding complexes (blue shift). This observation shows that the band gap (ΔE) increases upon complexation. Moreover, the peak intensities are very much

• the peak intensities upon complexation. The 1H NMR spectrum of compound 1. The 1H NMR spectrum of compound 4. SEM micrograph of compound 1 and histogram indicating the size distribution in the SEM images. SEM micrograph of compound 2 and histogram indicating the size distribution in the SEM images

Magnetic-Fe/Fe₃O₄-nanoparticle-bound SN38 as carboxylesterase-cleavable prodrug for the delivery to tumors within monocytes/macrophages

• Hongwang Wang,
• Tej B. Shrestha,
• Matthew T. Basel,
• Raj K. Dani,
• Gwi-Moon Seo,
• Sivasai Balivada,
• Marla M. Pyle,
• Heidy Prock,
• Olga B. Koper,
• Prem S. Thapa,
• David Moore,
• Ping Li,
• Viktor Chikan,
• Deryl L. Troyer and
• Stefan H. Bossmann

Beilstein J. Nanotechnol. 2012, 3, 444–455, doi:10.3762/bjnano.3.51

• ascorbic acid and 5.0 M ammonium acetate in distilled water. After the incubation period, 0.20 mL of ferrozine reagent solution was added. The complexation of iron(II) was complete within 30 min at room temperature, as indicated by UV–vis absorption spectrometry. The absorbance was recorded at 562 nm. Iron

Electron-beam patterned self-assembled monolayers as templates for Cu electrodeposition and lift-off

• Zhe She,
• Andrea DiFalco,
• Georg Hähner and
• Manfred Buck

Beilstein J. Nanotechnol. 2012, 3, 101–113, doi:10.3762/bjnano.3.11

• irradiation is a cross-linking of the aromatic units, which results in the elimination of defects through which metal ions can penetrate the SAM and be reduced at the SAM–substrate interface. In contrast to a scheme that involves complexation of metal ions with the SAM [41][42][43] and in which the metal is

Novel acridone-modified MCM-41 type silica: Synthesis, characterization and fluorescence tuning

• Maximilian Hemgesberg,
• Gunder Dörr,
• Yvonne Schmitt,
• Andreas Seifert,
• Zhou Zhou,
• Robin Klupp Taylor,
• Sarah Bay,
• Stefan Ernst,
• Markus Gerhards,
• Thomas J. J. Müller and
• Werner R. Thiel

Beilstein J. Nanotechnol. 2011, 2, 284–292, doi:10.3762/bjnano.2.33

• ), IR and UV–vis spectroscopy, as well as 29Si and 13C CP-MAS NMR techniques. The material features a high inner surface area and a highly ordered two-dimensional hexagonal pore structure. The fluorescence properties of the organic chromophore can be tuned via complexation of its carbonyl group with

Schottky junction/ohmic contact behavior of a nanoporous TiO₂ thin film photoanode in contact with redox electrolyte solutions

• Masao Kaneko,
• Hirohito Ueno and
• Junichi Nemoto

Beilstein J. Nanotechnol. 2011, 2, 127–134, doi:10.3762/bjnano.2.15

• nanostructure. It was reported that cathodic photocurrents were obtained at a nanocrystalline TiO2 film electrode due to oxygen reduction in alkaline solutions [7]. Visible light sensitization of TiO2 by surface complexation with [Fe(CN)6]4− has also been reported [8]. In such a case it was suggested that the