Materials Literature
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Um eine In-situ-Anellierung wurden die typischen Reaktionen bei Porphyrinoid-Synthesen aus Aldehyden und Dipyrromethanen ergänzt. Dieses Verfahren bietet einen neuartigen Zugang zu vollständig konjugierten aromatischen expandierten Porphyrinen. Die schnelle schrittweise Metallierung mit Zn(OAc)2 liefert je nach stöchi…
Abstract A blue–green emitting phosphor of the monoclinic Ba 2 MgSi 2 O 7 :Eu 2+ was prepared by the combustion‐assisted synthesis method and an efficient bluish‐green emission under from ultraviolet to visible light was observed. The luminescence, crystallinity and particle sizes were investigated by using luminescen…
We present a method for the evaluation of SAXS data of highly oriented semicrystalline polymers, allowing us to determine up to seven structural parameters from the measurements. The utilized samples were polypropylenes with varied distributions of the molecular weight, which were spun with different take-up velocitie…
Abstract Surface tension parameters and morphology of biopolyurethane composite surfaces based on natural polymers, before and after applying high frequency cold plasma treatment, have been evaluated. These surface tension parameters were calculated having on their basis the geometrical mean approach [Owens and Wendt,…
Sicherer Unterschlupf: Wird ein dreikerniger Gold(I)-Pyrazolat-Komplex in einen sechseckigen Silicatkanal eingebracht, wirkt dies als Schutz des Lumineszenz-Zentrums, das durch eine metallophile AuI-AuI-Wechselwirkung gebildet wird, vor thermischer Zerstörung. Darüber hinaus kann sich das Zentrum leicht selbständig vo…
We use computer simulations to explore the manner in which the particle displacements on intermediate time scales in supercooled fluids correlate to their dynamic structural environment. The fluid we study, a binary mixture of hard spheres, exhibits classic signatures of dynamic heterogeneity, including a bifurcated s…
Abstract Biodegradable poly(ε‐caprolactone) (PCL)/calcium carbonate (CaCO 3 ) nanocomposites were prepared and characterized. Effect of CaCO 3 on thermal and mechanical properties of PCL matrix was studied. Results showed that CaCO 3 acts as a crystallization nucleating agent and introduction of CaCO 3 leads to improv…
The charge order (CO) state can be observed by microprobe measurements such as nuclear magnetic resonance (NMR) and infrared spectroscopy. We used the infrared spectroscopy to examine ${(\text{TMTTF})}_{2}{\text{AsF}}_{6}$ and confirmed the CO transition seen in previous $^{13}\text{C}$-NMR studies. However we found t…
BACKGROUND: PhaR which is a repressor protein for microbial polyhydroxyalkanoates (PHA) biosynthesis, is able to attach to bacterial PHA granules in vivo, was developed as an affinity tag for in vitro protein purification. Fusion of PhaR-tagged self-cleavable Ssp DnaB intein to the N-terminus of a target protein allow…
This paper studies the performance degradation of graphene field-effect transistors due to the presence of traps. The mobile charge modulation by gate voltage is degraded because of immobile trapped charges. As a result the current is reduced and the on/off ratio is decreased. Extracted mobility using transconductance…
We report an experimental method for directly imaging optical near-fields of dielectric microspheres upon illumination with ultraviolet nanosecond laser pulses. The intensity distribution is imprinted in chalcogenide films leaving behind a characteristic fingerprint with features below 200 nm in size, which we read ou…
Transition metal antimonide nanoparticles, NiSb and FeSb 2, were synthesized by solvothermal method with the inclusion of various kinds of additives. X-ray diffraction (XRD) analysis confirmed the formation of hexagonal NiSb and orthorhombic FeSb 2 . NiSb nanoparticles of diameter about 10−40 nm and FeSb 2 nanorods of…
The tensile failure mechanism in thermally point-bonded bicomponent spunbonds is elucidated based on core/sheath PP/PE filaments. These fabrics exhibit high extension and low tensile strength. In contrast to 100% PP spunbonds, where there is limited bond deformation prior to failure of the fabric, the bond points in P…
meso-β doubly linked Zn(II) porphyrin arrays and their indene-fused analogues were prepared by Suzuki-Miyaura coupling and subsequent oxidation with DDQ-Sc(OTf)(3). The excited state properties of these conjugated porphyrin arrays have been investigated by steady-state and time-resolved spectroscopy along with quantum…
Linear polarization rotator is fabricated by a single-side homogenously aligned dye-doped liquid crystal cell and linear variable neutral density filter (LVNDF). When a pump beam passing through the transmittance-linear region of LVNDF irradiates on the untreated surface, the surface LC director in the irradiation reg…
The photochromic spirobenzopyran was incorporated as an internal modification into oligonucleotides by two different synthetic strategies: For the first route the spiropyran phosphoramidite was synthesized as a DNA building block, whereas for the second route the postsynthetic 'click'-type ligation was applied. Photoi…
An in situ annulation has been added to the typical reactions which comprise aldehyde–dipyrromethane porphyrinoid syntheses. This reaction provides a novel route to fully conjugated aromatic-expanded porphyrins. The fast stepwise metalation with Zn(OAc)2 provides monometalated and dimetalated species according to the…
Abstract An ultrasound‐assisted solution‐phase process has been applied for the aqueous synthesis of zinc sulfide nanocrystals in the presence of 3‐mercaptopropionic acid (3‐MPA) as a capping agent. The synthesis procedure was carried out by using two reagents: zinc chloride and sodium sulfide. Spherical shaped nanopa…
Conventional electrospinning produces randomly ordered nanofibers, however many potential applications require precisely defined morphology and anisotropic properties of nanofibrous materials. In this work, a collector consisting of two segments has been used to prepare uniaxially ordered nanofibers. Optimized collect…
A mixed-suspension, mixed-product removal (MSMPR) draft-tube-baffle crystallizer was used to estimate lactose crystallization kinetic rates under different processing conditions. The processing parameters investigated were the degree of supersaturation ( S ), agitation speed (rpm), the amount of seed (seed), and resid…