Materials Literature
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A revised crystal structure for mercerized cellulose based on high-resolution synchrotron X-ray data collected from ramie fibers is reported (space group P2(1), a = 8.10(3) A, b = 9.03(3) A, c = 10.31(5) A, gamma = 117.10(5) degrees; 751 reflections in 304 composite spots; theta < 21.11 degrees; lambda = 0.7208 A; LAL…
Einem Karussell ähnelt die Struktur der Titelverbindung [1⋅2 Py] (siehe Bild), der ersten Verbindung eines neuen Strukturtyps, die durch hochselektive Kondensationsreaktionen aus dem ebenfalls neuartigen [Fe(C5H4GaMe2)2] hergestellt wurde. Als Zwischenprodukt bildet sich das erste galliumverbrückte [m.m]Ferrocenophan…
Sensitised excitation of the DMN[3]DCME donor[bridge]acceptor system allows population of a triplet CT state with a microsecond lifetime in polar solvents. This is more than five orders of magnitude longer than the lifetime of the corresponding singlet CT state which is populated exclusively upon direct excitation. Th…
Das Wildtyp-Protein denaturiert unter Bedingungen, bei denen die Sekundär- und Tertiärstruktur der fluorierten Variante stabil bleiben. Dies ist auf den Einbau von 5′,5′,5′-Trifluorleucin 2 anstelle von Leucin 1 in ein Leucin-Reißverschluss-Protein bei der Biosynthese von E. coli zurückzuführen. Fluorierung des hydrop…
Without requiring chelation by sensitizers, a method to detect lanthanides by multiphoton excitation is reported. This suggests the use of lanthanides as calcium analogues in multiphoton microscopy. The spectrum shows the normalized two-photon excitation emission spectra (λex = 796 nm) of Eu(3+) with a resolution of a…
Abstract The formation and physicochemical properties of polymer electrolytes strongly depend on the lattice energy of metal salts. An indirect but efficient way to estimate the lattice energy through the relationship between the heterolytic bond dissociation and lattice energies is proposed in this work. The heteroly…
A multitechnique approach has allowed the first experimental determination of single-ion anisotropies in a large iron(III)-oxo cluster, namely [NaFe6(OCH3)12(pmdbm)6ClO4 (1) in which Hpmdbm = 1,3-bis(4-methoxyphenyl)-1,3-propanedione. High-frequency EPR (HF-EPR). bulk susceptibility measurements, and high-field cantil…
Abstract The influence of poly(ether imide) (PEI) on the structural ordering process in heat setting from the preoriented state of poly(ethylene 2,6‐naphthalene dicarboxylate) (PEN)/PEI blend films was investigated with the two‐color online birefringence system. The addition of small amounts of noncrystallizable PEI e…
Certain triblock copolymer surfaces have beneficial blood contacting properties that remain unexplained from a mechanistic perspective. In this study, poly(caprolactone-block-dimethylsiloxane-block-caprolactone) (PCL-b-PDMS-b-PCL) surfaces are characterized by dynamic contact angle analysis, angle-resolved X-ray photo…
The dynamic structure factor $f(q,t)$ of suspensions of adhesive colloidal spheres has been characterized as a function of temperature over the volume fraction range $0.010<\ensuremath{\varphi}<0.075.$ Below a critical temperature that is volume fraction dependent, the suspensions underwent an abrupt, reversible…
on an Si substrate results in the formation of individual alumina nanotubes (ANTs). The picture shows an ANT with a length of 650 nm and internal and external diameters of 12 and 35 nm, respectively. Detailed studies by transmission electron microscopy revealed that the ANTs are completely detached cells of the porous…
Abstract The purpose of this article is to study the fast structural changes that take place during the deformation and heat setting of uniaxially preoriented poly(ethylene 2,6‐naphthalate) films. For this purpose, an online birefringence measurement system coupled with a heat‐setting oven was used. In the online bire…
Die Insertion einer Difluoroxymethylen-Brücke in die mesogene Kernstruktur einer auf Phenylcyclohexan basierenden Verbindung (siehe Bild) führt zu einer neuen Klasse von Flüssigkristallen, die eine überraschende und bislang beispiellose Verbesserung aller anwendungsrelevanten Eigenschaften aufweist. Eine neue Methode…
Abstract Oil palm fibers represent a very abundant and natural resource for raw materials that can be efficiently utilized as reinforcement in polymers. The sorption characteristics of two types of oil palm fibers—oil palm empty‐fruit‐bunch (OPEFB) fiber and oil palm mesocarp fiber‐in distilled water, mineral water, a…
We investigate the effect of anisotropy in grain boundary mobility on the dynamics, morphology, and topology of grain growth, using both analytical and numerical calculations on a generalized anisotropic phase field model. The dependence of the grain boundary mobility on both inclination and misorientation is included…
Details of the electronic and structural connections between macropolyhedral boranes and elemental boron are reported. The nature of electron deficiency in the beta-rhombohedral polymorph of boron is analyzed by using a molecular fragments approach with boranes as model systems. The B57H36 molecule constructed from su…
Insertion of a difluorooxymethylene bridge into the mesogenic core structure of phenylcyclohexane-based liquid crystals results in a class of materials that exhibits a surprising and unprecedented improvement of essentially all application-relevant properties. A novel synthetic procedure allows the convenient large-sc…
Abstract The plastic behavior of polyamide‐6 (or nylon‐6) films under uniaxial and biaxial tensile drawing is studied in relation to structural features. Quenched films in the mesomorphic β form are more ductile than films in the predominant stable α form. Films in the major γ crystalline form are intermediate between…
Edible films were prepared from solutions of soy protein with calcium salts and glucono-delta-lactone (GDL). Calcium salts cross-linking interactions with soy-protein isolate (SPI) could result in the formation of films with rigid three-dimensional structure. GDL contributed to the formation of a homogeneous film stru…
The hyperbolic geometry of the pores in SBA-15 are drawn into a three-dimensional structure by small lateral pores, distributed in a random way, as shown in the picture, which interconnect the main channels. This construction was established by forming a "negative" of the structure with platinum precipitated in the ch…