Materials Literature
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Exchange coupling is quantified in lanthanide (Ln) single-molecule magnets (SMMs) containing a bridging N(2)(3-) radical ligand and between [Cp*(2)Yb](+) and bipy(•-) in Cp*(2)Yb(bipy), where Cp* is pentamethylcyclopentadienyl and bipy is 2,2'-bipyridyl. In the case of these lanthanide SMMs, the magnitude of exchange…
Gadolinium chelates, which are currently approved for clinical MRI use, provide relaxivities well below their theoretical limit, and they also lack tissue specificity. Recently, the geometrical confinement of Gd(3+) -based contrast agents (CAs) within porous structures has been proposed as a novel, alternative strateg…
The charge carriers in graphene are massless Dirac fermions and exhibit a relativistic Landau-level quantization in a magnetic field. Recently, it has been reported that, without any external magnetic field, quantized energy levels have been also observed from strained graphene nanobubbles on a platinum surface, which…
In this investigation, a recent model for assessing the electrical conductivity of nanocomposites comprising a single type of conductive nanofiller was expanded to cases with mixtures of nanofillers. The extended model considers electron tunneling as the effective mechanism for insulator-conductor transition. The mode…
Hydrotalcite-like anionic clays or layered double hydroxides with dodecylbenzenesulfonate anions (NiFe, NiAl, and NiCr LDH-SDS, where SDS denotes sodium dodecyl sulfate) were prepared by the coprecipitation method. Hexaphenoxycyclotriphosphazene (HPCP) is an effective cyclophosphazene flame retardant. The HPCP molecul…
In humid air, copper and its high copper alloys (bronze) tend to form an oxide layer (patina). Natural patinas protect copper and its alloys from further corrosion processes. On the other hand, artists have frequently deliberately patinated bronze for visual effects. Thus, it is of great importance to study the patina…
This paper reviews charge ordering in the organic conductors, β″-(BEDT-TTF) (TCNQ), θ-(BEDT-TTF)2X, and α-(BEDT-TTF)2X. Here, BEDT-TTF and TCNQ represent bis(ethylenedithio)tetrathiafulvalene and 7,7,8,8-tetracyanoquinodimethane, respectively. These compounds, all of which have a quarter-filled band, were evaluated us…
With the aim of controlling helicity of self-assembled fibers, a pair of water soluble perylene derivatives has been designed and synthesized. Intermolecular hydrogen bonding interactions and π-π stacking, combined with the effect of molecular chirality, have been found to guide the aggregation that eventually led to…
Two types of thieno-bridged porphyrins were synthesized by incorporating a thiophene group across their meso and β positions with different directions of the thiophene ring to investigate the aromaticity of these porphyrins with extended π-systems. The 2,3-thieno-bridged porphyrin showed a larger antiaromatic contribu…
We report a comprehensive joint experimental-theoretical study of the equilibrium pair-structure and short-time diffusion in aqueous suspensions of highly charged poly-acrylate (PA) spheres in the colloidal fluid phase. Low-polydispersity PA sphere systems with two different hard-core radii, R(0) = 542 and 1117 Å, are…
Transparent and high refractive index 0.2 La 2 O 3 ·0.8 WO 3 glass was prepared in bulk form using containerless processing. The glass transition temperature, crystallization onset temperature, and melting temperature were 553°C, 594°C, and 1043°C, respectively. The glass was colorless and widely transparent, in the v…
A new type of bismuth doped Ba(2)B(5)O(9)Cl crystal is reported to exhibit broadband near infrared (NIR) photoluminescence at room temperature, which has been identified here originating from elementary bismuth atom. Rietveld refining, static and dynamic spectroscopic properties reveal two types of Bi(0) centers in th…
We theoretically investigate the frictional drag induced by the Coulomb interaction between spatially separated massless and massive fermions in the Boltzmann regime and at low temperatures. As a model system, we use a double-layer structure composed of a two-dimensional electron gas (2DEG) and an $n$-doped graphene l…
Ultrafast transient absorption measurements reveal that the rate constant for photoinduced electron transfer (PET) from colloidal CdS quantum dots (QDs) to alkylcarboxylate-functionalized viologens is independent of the number of methylene groups in the alkyl chain ( n ). The rate constant for PET is (1.2 ± 0.3) × 10…
Absorption UV spectra of gold clusters Au(n) (n = 4, 6, 8, 12, 20) are investigated using the time-dependent density functional theory (TDDFT). The calculations employ several long-range corrected xc functionals: ωB97X, LC-ωPBEh, CAM-B3LYP∗ (where ∗ denotes a variant with corrected asymptote of CAM-B3LYP), and LC-ωPBE…
Porous carbon obtained by dehydrating agent, concentrated sulfuric acid (H 2 SO 4 ), from biomass containing high cellulose (filter paper (FP), bamboo waste, and empty fruit bunches (EFB)) shows very high surface area and better thermal behavior. At room temperature (without heating), treatment of H 2 SO 4 removed all…
Redoxisomerie wurde erstmals für einen Lanthanoidkomplex beobachtet. Bei Temperatursenkung geht ein Elektron in [{(dpp-bian)Yb(μ-Cl)(dme)}2] (1) vom Metallzentrum auf den Liganden über (siehe Bild), was zu einer deutlichen Verkürzung der Yb-N-Bindungen und zum Auftreten eines hysteretischen Sprungs des magnetischen Mo…
During thermo-mechanical processing, the strain energy stored in the microstucture of an FCC polycrystalline aggregate is generally reduced by physical phenomena controlled, at least partially, by mechanisms involving dislocation cell or grain boundary motion such as recovery, recrystallisation and grain growth. This…
Peptide-based packaging systems show great potential as safer drug delivery systems. They overcome problems associated with lipid-based or viral delivery systems, vis-a-vis stability, specificity, inflammation, antigenicity, and tune-ability. Here, we describe a set of 15 & 23-residue branched, amphiphilic peptides th…
A one-step approach towards the synthesis of folic acid (FA) coated silver nanoparticles (AgNPs) and doxorubicin (DOX) for drug delivery is proposed. The FA-AgNPs were 23 +/- 2 nm in diameter and showed good monodispersity with a characteristic surface plasmon peak at 409 nm. Taking advantage of the enhanced Raman sig…