Materials Literature
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Mesenchymal stem cells (MSCs) are capable of differentiating into multiple cell lineages and are useful for therapeutic applications. Labeling the MSCs with fluorescent probes is beneficial in tracing the fate of MSCs after implantation. We have introduced the CdSe/ZnS quantum dots (QDs) into the human bone marrow MSC…
Heptanuclear metal-centered, six-membered, mixed-valent, heterometallic wheels 1-3 of iron, manganese, and indium were prepared in a one-pot reaction from N-benzyldiethanolamine (H2L(1)), cesium carbonate, [PPh4]2[MnCl4], and FeCl3 or InCl3. All three complexes were characterized by the combination of elemental analys…
Thin films of $\mathrm{V}(\mathrm{TCNE}{)}_{x}$ were deposited in ultrahigh vacuum using a film growth technique based on in situ chemical vapor deposition of tetracyanoethylene, TCNE, and bis-benzene vanadium, $\mathrm{V}({\mathrm{C}}_{6}{\mathrm{H}}_{6}{)}_{2}$. The in situ preparation method enabled, for the first…
Ten trans-A2B and A3-type corrole photosensitizers carrying functional groups were synthesized and screened for PDT activities. Photocytotoxicity was measured by the MTT cell reduction assay on a cultured human nasopharyngeal carcinoma (NPC) cell line (HONE-1). Experimental results indicated that corroles containing a…
This study extends the understanding of the effects of morphology and chain architecture on mechanical properties of block copolymers by isolating the effect of morphology from other factors, such as composition and molecular weight. Using a single poly(isoprene−styrene−isoprene) triblock copolymer (ISI), we have used…
Fe3O4 particles embedded in bamboo-shaped carbon microtubes (defined as "BCIOs") with ferromagnetic properties were in situ produced by redox reactions between ferrocene and glycerol in a stainless steel autoclave of 20-mL capacity at 600 degrees C; these BCIOs have wide and periodic variable outer diameter distributi…
Scission precision: The combination of Lewis acidic and Lewis basic building blocks in copper(I) thiolate clusters enables control of the thermal decomposition pathway in the design of new molecular precursors for Cu2S formation. After CS bond scission, large clusters with cuprous sulfide cores are isolated as interm…
Photochemisches Schalten der Dielektrizitätskonstante trifft man erstmalig in dem Spin-Crossover-Komplex [Fe(L)(CN)2]⋅H2O an (siehe Bild; L=2,13-Dimethyl-6,9-dioxa-3,12,18-triazabicyclo[12.3.1]octadeca-1(18),2,12,14,16-pentaen). Die elektrische Detektion des photoinduzierten Wechsels des Spinzustands lässt derartige K…
Single and double layered composite microspheres were prepared by encapsulating gentamicin-loaded silica xerogels with biodegradable PLGA polymers (poly(DL-lactide-co-glycolide)). The in vitro drug release properties of both the composite microspheres were investigated. The single layered composite microspheres showed…
The use of salicylaldehyde oxime (H2salox) in iron(III) carboxylate chemistry has yielded two new hexanuclear compounds [Fe6(mu3-O)2(O2CPh)10(salox)2(L)2].xMeCN.yH2O [L = MeCONH2, x = 6, y = 0 (1); L = H2O, x = 2, y = 3 (2)]. Compound 1 crystallizes in the triclinic space group P with (at 25 degrees C) a = 13.210(8) A…
Abstract The corrosion inhibition of aluminum in H 2 SO 4 in the presence of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) and the effect of addition of halides (KCl, KBr, KI) was studied using the hydrogen evolution technique at 30 and 40°C. Inhibition efficiency (% I ) increases with concentration of PVA and…
This paper aims to clarify the calculation of effective phase volume fractions in polymer−clay nanocomposites so that conventional composite theory for the volume fraction dependencies of properties can be applied. In this way, such nanocomposites, which are treated as a separate class of composites, can be brought un…
A series of titanium catecholates have been prepared and characterized by single-crystal X-ray diffraction studies. Complexes 1a-7a were synthesized by the reaction of 1 equiv of ligand with Ti(OiPr)4. All are dimers in the solid-state, in which a catechol bridges between two titanium centers. Electronic (nitro and me…
Enzymatic preparations and specialized analytical tools have shown that chloroplast-derived glycolipids are the main substrates for the biosynthetic pathway that produces antiproliferative polyunsaturated aldehydes in broken cells of the marine diatom Thalassiosira rotula. This process, which is associated with the fo…
Abstract The aim of the investigations was to analyze the influence of the temperature during the irradiation process of polypropylene on the molar mass, the formation of long chain branching and the final branching topology. A linear isotactic polypropylene homopolymer was modified by electron beam irradiation at dif…
We measure the dynamic structure factor (DSF) of probe particles embedded in an aging laponite suspension quenched by cessation of shear and the associated relaxation time tau as a function of wave vector q and aging time t(w). The different q dependences measured in the successive exponential and full aging regimes,…
Zr-rich, Nb-doped lead zirconate titanate ceramic and powder samples with composition near ${\mathrm{Pb}}_{0.99}{({\mathrm{Zr}}_{0.95}{\mathrm{Ti}}_{0.05})}_{0.98}{\mathrm{Nb}}_{0.02}{\mathrm{O}}_{3}$ [PZT95/5(2Nb)] have been studied in the range of hydrostatic pressure 0--6.2 kbar and temperature 12--295 K by time-of…
The synthesis and spectroscopic and magnetic characterization of several hydridotris(3,5-dimethylpyrazol-1yl)borate (Tp*) iron(II) and iron(III) tricyanide complexes, a rectangular cluster, and a one-dimensional chain of squares are described. Treatment of [NEt4][(Tp*)Fe(III)(CN)3] (3) with manganese(II) triflate in d…
Abstract A novel method for modeling the shape evolution of 3‐dimensional (3‐D) faceted crystals has been developed in which the normal distances to each face from an origin inside the crystal are represented by a system of ordinary differential equations. The model is initialized from an arbitrary initial seed shape…
By simultaneously measuring the excitation spectra of transient luminescence and transient photoconductivity after picosecond pulsed excitation in rubrene single crystals, we show that free excitons are photoexcited starting at photon energies above 2.0 eV. We observe a competition between photoexcitation of free exci…