The helical ribbon and double-layered nanotubular structures of the titanium dioxide were created by sol−gel polymerization Ti(OiPr)4] using 1 as a template in 1-butanol. All TiO2 nanotubes consist two layers, 8−9 nm nanospace between layers. In addition, helicity showed right-handed motif.

pH-sensitive gels: By using a cyclohexane-based scaffold to which various amino acid based substituents can be connected, low-molecular-weight compounds were obtained that gelate water at very low concentrations. Their modular design (see picture: AA=amino acid(s), X=hydrophilic substituent, dark purple=hydrophobic region, light purple=hydrophilic region), allows tuning of the thermally and pH-induced reversible gel-to-sol transition their gels. Supporting information for this article is...

Social networking: A variety of novel multicompartment nanostructures has been easily formed by combining the supramolecular aggregative properties surfactants with low-molecular-weight hydrogelators that are based on 1,3,5-cyclohexyltricarboxamide (see picture, AA=amino acid). The resulting structures include self-assembled interpenetrating networks.

The synthesis of a new saccharide-based gelator (2) containing donor moiety has been described. Gelation experiments dual-component gel consisting bearing an acceptor group (1) and 2 have performed in variety organic solvents water. Moreover, gelation tests at different molar ratios 1 water, octanol, diphenyl ether. In these last two color change was observed, from colorless to yellow, upon cooling the sample room temperature. This phenomenon further investigated by UV-visible spectroscopy,...

Abstract Die Wissenschaft wird wie die Kunst und Architektur von den faszinierenden Formen Mustern der Natur beeinflusst. Mechanismen, zu organischen, anorganischen bioorganischen Strukturen führen, wurden in Physik Biologie intensiv erforscht, aber auch Chemie interessiert sich für Konzepte, auf denen Bildung regelmäßiger beruht. Während Organischen insbesondere Supramolekularen Synthese großer Überstrukturen bereits früh mit großem Erfolg umgesetzt wurde, gelang es innerhalb Anorganischen...

An enzymatically cleavable low molecular weight gelator-(model) drug conjugate system can be employed to effect a two-step enzyme mediated release, demonstrating the potential of LMWG systems for development delivery devices.

A novel and facile method for the fabrication of hollow spherical silica is presented. Mixing poly(L-lysine) together with lipophilic amine additives in water results formation large aggregates, which can be transcribed into their analogues by addition tetraethylorthosilicate (TEOS). By varying it has been established that amino moieties additive, rather than those poly(L-lysine), play a crucial role transcription process.

Reactions of ReO(PPh(3))(2)Cl(3) with tetradentate bis(salicylideneamine) ligands, H(2)salpd (1) and H(2)salbd (2), in different alcohols gave the novel mixed-ligand rhenium complexes ReO(sal)OAlk (OAlk = variety alkoxy ligands). Configurational studies show that ReO(salpd)OAlk (1a-f) display either a symmetrical or nonsymmetrical configuration, depending on size alcohol its boiling point. The ReO(salbd)OAlk (2a-d) are all due to number carbons bridge imine nitrogens. In case ReO(salpd)OMe...

Seven new 1,3,5-cyclohexyltricarboxamide-phenylalanine derivatives were synthesized in order to investigate the effect of amino acid chirality on gelating properties these small molecules water. Gelation tests have shown that enantiomerically pure homochiral 1,3,5-cyclohexyltricarboxamide-L-phenylalanine is a non-hydrogelator as it crystallizes from water, whereas heterochiral with either two L-phenylalanine moieties and one D-phenylalanine (LLD), or vice versa (DDL), are very good...

The fluorescent properties of a new 1,3,5-cyclohexyltricarboxamide-based low-molecular-weight hydrogelator (1) derivatized with one hydrophobic fluorophore and two hydrophilic substituents have been investigated. Gels 1 are composed long, nonbranched fibers uniform diameter, as shown by cryo-transmission electron microscopy (cryo-TEM). aggregation the naphthalene moieties gelator molecules in gel favors occurrence fast energy migration process that allows very efficient sensitization...

Additive manufacturing has been a breakthrough therapy for the pharmaceutical industry raising opportunities long-quested properties, such as controlled drug-delivery. The aim of this study was to explore geometrical capabilities selective laser sintering (SLS) by creating spiked (tapered-edged) drug-loaded specimens administration in colon. Poly(vinyl alcohol) (PVA) used binding material and loperamide hydrochloride incorporated active ingredient. Printing feasible without addition agent or...

Additive manufacturing, also known as 3D printing, is an up-and-coming production technology based on layer-by-layer deposition of material to reproduce a computer-generated design. manufacturing collective term used for variety technologies, such fused modeling (FDM), inkjet printing (IJP), powder bed (PBP), and selective laser sintering (SLS). Owing the unique opportunities it provides flexible items digital designs, has found many applications in industries, including automotive,...

Summary The ongoing COVID‐19 pandemic is having a tremendous effect on the current food system. situation urges us to face many issues never experienced before, aimed at mitigating multitude of sanitary and social risks. has affected system in ways: significant changes dietary habits health status people; chain broken, which an security (including making it difficult find or buy fresh affordable prices); unemployment underemployment rising due damages sector; there lack food‐socialising...

Transcription of organic templates into shapely inorganic materials is generally believed to occur because charge or hydrogen bonding interactions between the template and precursor; formation material always promoted by a catalyst present in solution. In this paper, we prove for first time existence so-called surface mechanism, which allows transcription process take place via initiated (here silica) exclusively on surface. Further growth takes solely surface, resulting an product...

Abstract New cholesterol-based gelators bearing a 4-, 3-, or 2-pyridyl group (1, 2, 3, respectively) have been designed. Compound 1 gelled 16 of the 19 solvents tested, indicating that acts as very versatile gelator. The gelation ability compound 2 was significantly improved by added AgOTf, owing to an Ag(I)-pyridine interaction. findings indicate pyridyl is useful impart new functions organogel systems.

Soziale Netzwerke: Eine Vielfalt von kompartimentierten Nanostrukturen kann leicht gebildet werden, indem man die supramolekularen Aggregationseigenschaften Tensiden und niedermolekularen Hydrogelbildnern auf 1,3,5-Cyclohexyltricarboxamid-Basis kombiniert (siehe Bild; AA = Aminosäuren). Unter den Produkten finden sich auch verzahnte selbstorganisierte Netzwerke Vesikelkonfigurationen im Verbund mit Hydrogelfasern. Supporting information for this article is available on the WWW under...

Additive manufacturing or 3D printing can be applied in the food sector to create products with personalized properties such as shape, texture, and composition. In this article, we introduce a computer aided engineering (CAE) methodology design printed tunable mechanical properties. The focus was on Young modulus proxy of texture. Finite element modelling used establish relationship between cookies honeycomb structure their parameters. Wall thickness, cell size, overall porosity were found...

A study on the effect of a brush coating polyacrylic acid (PAA) grafted with poly(ethylene glycol) (PEG) (PAA-g-PEG) friction was done for sliding system that involves silicone skin L7350: rubber used by Fédération Internationale de Football Association (FIFA) determination skin–surface in combination artificial grass. Friction experiments were carried out using reciprocating flat-on-flat test setup selected and compared PAA-coated fluoroalkane-coated samples. The focused water. Results...

A novel type of radiometal-containing dendrimer with potential radiotherapeutical applications is described. Different generations this adamantane-terminated, Fréchet-type (28, 29, 30), each consisting two dendritic wedge ligands around a rhenium core, have been synthesized in organic solvent via reaction ReO(PPh(3))(2)Cl(3). Through complexation their adamantane groups by beta-cyclodextrins (beta-CDs), these dendrimers were made water soluble (9.6, 0.4, and 0.2 mM, respectively)....

The calix[4]arene platform was used for the syntheses of novel rhenium(V) complexes, that may have potential applications as radiopharmaceuticals. reaction ReO(PPh3)2Cl3 with tetradentate N2O2-calix[4]arene ligand 8 in ethanol gave mixed-ligand rhenium complex 9 structure ReO(N2O2-calix)OEt. configuration elucidated by using a number 1H NMR techniques. In 9, ethoxy could be easily and quantitatively exchanged another monodentate to give 12. Tetradentate N2S2-calix[4]arene 15 formed 16 either...