Materials Literature
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Silver nanoclusters protected by achiral 3-mercaptophenylboronic acid (3-MPB) with a mean core diameter of about 0.8 nm are successfully synthesized. Addition of chiral d - or l -fructose into the basic aqueous solution of the silver nanoclusters does not practically alter their absorption spectra, whereas it brings a…
Tetrameric porphyrin formation of 2-hydroxymethylpyrrole fused with porphyrins through a bicyclo[2.2.2]octadiene unit gave bicyclo[2.2.2]octadiene-fused porphyrin pentamers. Thermal conversion of the pentamers gave fully pi-conjugated cruciform porphyrin pentamers fused with benzene units in quantitative yields. UV/Vi…
A family of inorganic−organic hybrid solid materials has been assembled from presynthesized organic decamethylcucurbit[5]uril (Me 10 Q[5]) macrocycles and the well-known inorganic polyoxometalate (POM) clusters. Three compounds, formulated as [Na 6 (H 2 O) 11 (Me 10 Q[5]) 2 ]·[β-H 2 W 12 O 40 ]·5H 2 O ( 1 ), [Na 4 (H…
A tetrathiafulvalene donor has been annulated to the bay region of perylenediimide affording a new pi-conjugated molecular dyad. Various electronic excited charge-transfer states are generated in different oxidation states, leading to almost full absorption in the visible to near-IR region with a high extinction coeff…
Unter milden Bedingungen und ohne Katalysator verläuft die direkte Transferhydrierung von Iminen mit Borazan. Die kinetischen Isotopeneffekte sowie die Ergebnisse von Hammett-Korrelationen und Dichtefunktionalrechnungen stützen einen konzertierten Mechanismus über eine doppelte Wasserstoffübertragung (siehe Schema).
In this paper, we report on a facile and environmentally friendly large-scale synthesis of micrometer-sized silver nanosheets without the introduction of any seeds, polymers, surfactants, or sacrificial substrates. Through the addition of a small quantity of H 2 PdCl 4, AgNO 3 can easily be reduced by H 2 O 2 in basic…
Existing sensor platforms have limited sensitivity, specificity, and portability. With a new algorithm for the coupled dipole approximation of Maxwell's equations, we examine near- and far-field features of electromagnetism (EM) coupled with localized surface plasmons on subwavelength, solid-state nanoparticle (NP) st…
More than 100 years ago, W. Ostwald formulated his rule of stages. He predicted that phase formation processes in complex systems proceed via a discrete series of metastable states, which can be formed in a macroscopic form at the given thermodynamic conditions, until finally the most stable phase will be reached. We…
Abstract Aluminium alloys such as AA2024 are susceptible to severe corrosion attack in aggressive solutions (e.g. chlorides). Conversion coatings, like chromate, or rare earth conversion coatings are usually applied in order to improve corrosion behaviour of aluminium alloys. Methacrylate‐based hybrid films deposited…
Abstract Ordered anodic aluminium oxide (AAO) films were first prepared by anodising in a phosphoric acid electrolyte and then studied extensively and characterised by field emission gun‐scanning electron microscopy (FEG‐SEM), X‐ray diffraction, Raman and infrared spectroscopy at a macroscopic scale. These analyses sh…
Many thiolate-protected gold clusters prepared by wet-chemistry show abundances of certain compositions which can be explained by the shell-closing of the superatom orbitals 1S, 1P, 1D, ..., leading to magic-number series 2, 8, 18, 20, 34, 58, etc. One recently isolated such cluster, Au 44 (SPh) 28 2−, is a potential…
The polymer blend of polyethyleneoxide (PEO) and polymethylmethacrylate (PMMA) constitutes a miscible blend of high dynamical asymmetry; that is, the fully miscible components exhibit a large difference in their glass-transition temperatures, which are 200 K apart. To get a deeper understanding of the unusual PEO dyna…
In this paper we take a few steps further in the development of an approach based on the use of an artificial neural network (ANN) to introduce long-range chemical effects and zero temperature relaxation (elastic strain) effects in a rigid lattice atomistic kinetic Monte Carlo (AKMC) model. The ANN is trained to predi…
We numerically study the thermoelectric transports of Dirac fermions in graphene in the presence of a strong magnetic field and disorder. We find that the thermoelectric transport coefficients demonstrate universal behavior depending on the ratio between the temperature and the width of the disorder-broadened Landau l…
W/Cr codoped Bi 4 Ti 3 O 12 ceramics, Bi 4 Ti 3− x W x O 12+ x +0.2 wt%Cr 2 O 3 (BITWC, x =0–0.15), were prepared using a solid‐state reaction method. The crystallographic evolution and phase analysis were distinctly determined focusing on the X‐ray diffraction peak changes in (020)/(200) and (220)/(1115) diffraction…
In this paper, we report on a convenient and quick self-assembly of thioglycolic acid (TGA)-capped CdTe nanocrystals (NCs) into three-dimensional (3D) nanostructures in solution, in which large-scale nanowires are found as building blocks. The wet 3D nanostructures can be further dried by critical CO 2 to obtain solid…
SrCe 0.95 Tm 0.05 O 3−δ perovskite-type ceramic membranes offer high hydrogen selectivity, thermal stability, mixed protonic−electronic conductivity, and mechanical strength at temperatures above 600 °C. However, in order for the SrCeO 3 -based membranes to be used in industrial applications, the chemical stability of…
Abstract As a continuation of our previous studies on thermostable materials, heptacyclic laddersiloxanes and ladder polysilsesquioxane were synthesized. The first heptacyclic laddersiloxanes were obtained by chlorination of pentacyclic laddersiloxanes prepared using our stereocontrolled synthesis procedure; thereafte…
The fate of nanoparticles used as stabilizers in solids-stabilized, or Pickering, emulsion polymerization for the formation of armored hybrid polymer latexes was studied. We showed that disk centrifugation can be used as a powerful quantitative tool to analyze and determine the concentration of nanoparticles in the wa…
The phase diagram of ${\text{NdFe}}_{1\ensuremath{-}x}{\text{Co}}_{x}\text{AsO}$ for low cobalt substitution consists of a superconducting dome $(0.05<x<0.20)$ with a maximum critical temperature of 16.5(2) K for $x=0.12$. The $x=1$ end member, NdCoAsO, is an itinerant ferromagnet $({T}_{C}=85\text{ }\text{K})$…