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physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01), p. 711-716

An ESR study was made of defects produced by γ‐irradiation in hydrazonium sulphate (N 2 H 6 SO 4 and N 2 D 6 SO 4 ). The analysis of the experimental data shows that N 2 H and N 2 D defects are formed. The mechanism of the appearance of these defects is a breakage of N–H and N–D bonds, respectively. Some remarks about the character of the singly occupied orbital are made.

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0370-1972, 1521-3951

English

Wiley

1969

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1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 4 ( 2022-01-21)

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0044-8249, 1521-3757

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2022

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Angewandte Chemie, Wiley, Vol. 134, No. 9 ( 2022-02-21)

CRISPR/Cas9 is emerging as a platform for gene therapeutics, and the treatment efficiency is expected to be enhanced by combination with other therapeutic agents. Herein, we report a proton‐activatable DNA‐based nanosystem that enables co‐delivery of Cas9/sgRNA and DNAzyme for the combined gene therapy of cancer. Ultra‐long ssDNA chains, which contained the recognition sequences of sgRNA in Cas9/sgRNA, DNAzyme sequence and HhaI enzyme cleavage site, were synthesized as the scaffold of the nanosystem. The DNAzyme cofactor Mn 2+ was used to compress DNA chains to form nanoparticles and acid‐degradable polymer‐coated HhaI enzymes were assembled on the surface of nanoparticles. In response to protons in lysosome, the polymer coating was decomposed and HhaI enzyme was consequently exposed to recognize and cut off the cleavage sites, thus triggering the release of Cas9/sgRNA and DNAzyme to regulate gene expressions to achieve a high therapeutic efficacy of breast cancer.

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0044-8249, 1521-3757

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2022

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physica status solidi (b), Wiley, Vol. 33, No. 2 ( 1969-01), p. 587-598

The temperature dependence of the absorption spectrum from the edge to the inset of the lattice vibrations can be described by indirect band‐band transitions and excitations from a thermally occupied trap level, the existence of which has been proved in the second part of this paper by illumination at low temperatures changing the absorption and photoconductivity spectrum inportantly. – Free carrier absorption superimposed on the lattice spectrum has been found at high temperatures. Its increase proportional to λ 3 suggests scattering by charged centres. Their density is about 5 × 10 20 cm −3 surpassing impurities by a factor of 10 2 . The effective mass of holes is estimated at 8 m 0 corresponding to a conductivity by hopping processes. The complicated lattice vibration spectrum is nearly independent of temperature between 4 and 13 μm indicating that there are no combination bands.

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0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01), p. 733-740

Bandverbiegungen infolge einer hohen Dichte geladener Störstellen werden diskutiert, und es wird gezeigt, daß Sattelpunkte zwischen Coulomb‐repulsiven Zentren als Potentialbarrieren wirken können, über die hinweg Leitfähigkeit stattfindet, falls der mittlere Abstand zwischen den Sattelpunkten klein gegen die mittlere freie Weglänge ist. Für eine Defektdichte von 10 20 cm −3 liegen die Sattelpunkte etwa 0,25 eV von den entsprechenden Bandkanten entfernt und haben einen Abstand von 20 Å, während die mittlere freie Weglänge, bestimmt durch Streuung von Ladungsträgern an Ionen, etwa dreimal so groß ist, falls sie sich etwa 1 kT oberhalb dieser Sattelpunkte bewegen. Es wird vorgeschlagen, daß die Sattelpunkte maßgebend für die Tatsache sind, daß die thermische Aktivierungsenergie gewöhnlich 0,1 bis 0,3 eV größer ist als die halbe Breite der optisch bestimmten verbotenen Zone.

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0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01), p. 759-764

Simultaneous Faraday rotation, reflectivity, and Hall effect measurements made on two Te doped, n‐type GaSb single crystals of various doping, have been used to determine the characteristics of the L 1 conduction band minimum as a function of the ratio K = m 1 *(L 1 )/ m t *(L 1 ). Using the theoretical value K = 13, we have obtained for the transverse effective mass of the (111) minimum electrons and for the energy separation of the L 1 and Γ 1 minima: m t *(L 1 ) = 0.12 m e and Δ E = 83 meV at 300°K with d(Δ E )/d t = 5.5 × 10 −5 eV/°K. Complementary conductivity measurements were made to obtain the mobilities of the two conduction band carriers.

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0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 11 ( 2022-03-07)

Ein Katalysator, zwei Reaktionsaufbauten, drei Monomere und unbegrenzte Möglichkeiten für makromolekulare Mikrostrukturen: Der Eisen‐Guanidin‐Komplex [FeCl 2 (TMG5NMe 2 asme)] ( 1 ) polymerisiert Lactid schneller als das industriell verwendete Zinnoktanoat und zeigt hohe Aktivitäten für Glycolid und ϵ‐Caprolacton. Seine herausragenden Eigenschaften ermöglichen die Synthese von blockförmigen sowie randomisierten Copolymeren in der Schmelze durch eine einfache Änderung des Polymerisationsaufbaus. Die sequenzielle Zugabe von Monomeren führt zu hoch geordneten Blockcopolymeren, einschließlich der symmetrischen PLA‐ b ‐PGA‐ b ‐PCL‐ b ‐PGA‐ b ‐PLA‐Pentablockcopolymere, während die Polymerisation von Monomermischungen starke Umesterungen nutzt, um zu Di‐ und Terpolymeren mit hochdisperser Verteilung der Wiederholungseinheiten zu kommen. Ein robuster Katalysator, der unter industriell anwendbaren Bedingungen aktiv ist und Copolymere mit gewünschten Mikrostrukturen herstellt, ist ein wichtiger Schritt in Richtung biokompatibler Polymere mit maßgeschneiderten Eigenschaften als Alternative zu herkömmlichen Kunststoffen auf dem Weg zu einer nachhaltigen Kreislaufführung von Materialien.

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0044-8249, 1521-3757

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physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01), p. 797-803

Thermal vacancies in polycrystalline cadmium are studied by means of resistivity measurements at equilibrium conditions. The resistivity increment deduced by extrapolation of the low‐temperature resistivity variation leads to a vacancy formation energy lying in the range 0.36 to 0.39 eV and to an equilibrium vacancy concentration of 3 × 10 −3 at the melting point. These values are discussed and compared, in absence of available quenching data, to corresponding values deduced from other equilibrium methods.

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0370-1972, 1521-3951

English

Wiley

1969

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1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01), p. 805-813

[Russian Text Ignored.]

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 16 ( 2022-04-11)

Organic materials with excitation wavelength‐dependent (Ex‐de) emission are highly attractive for anticounterfeiting, optoelectronics and bioassay applications; however, the realization of Ex‐de fluorescence, independent of aggregation states, remains a challenge. We herein report a photoinduced electron transfer (PeT) strategy to design Ex‐de fluorescence materials by manipulating the relaxation pathways of multiple excited states. As expected, the o‐carborane dyad presents a clear Ex‐de fluorescence colour in the aggregated states, resulting from the tunable relative intensity of the dual‐fluorescence spectra. Taking TP[1]B as an example, the amorphous powders emitted bright blue‐violet, white and yellow colours under 390 nm, 365 nm and 254 nm UV illumination, respectively. Importantly, multicolour, flexible and transparent films as well as an anticounterfeiting application using this o ‐carborane dyad are demonstrated.

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0044-8249, 1521-3757

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physica status solidi (b), Wiley, Vol. 35, No. 1 ( 1969-01), p. 305-312

Die gleichzeitige Diffusion von 64 Cu und 67 Cu wurde im Bereich von 890 bis 1061 °C an Kupfereinkristallen gemessen. Die Größe des Isotopeneffekts f Δ K ergibt sich zu 0,684 ± 0,014 und ist temperaturunabhängig innerhalb der Meßgenauigkeit. Dies bedeutet, daß der Beitrag von Doppelleerstellen zur Selbstdiffusion in Kupfer gering ist. Der Diffusionskoeffizient von 67 Cu in Kupfereinkristallen wurde im Bereich von 700 bis 1060 °C gemessen und ergibt sich zu ,

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 13 ( 2022-03-21)

The global surge in bacterial resistance against traditional antibiotics triggered intensive research for novel compounds, with antimicrobial peptides (AMPs) identified as a promising candidate. Automated methods to systematically generate and screen AMPs according to their membrane preference, however, are still lacking. We introduce a novel microfluidic system for the simultaneous cell‐free production and screening of AMPs for their membrane specificity. On our device, AMPs are cell‐free produced within water‐in‐oil‐in‐water double emulsion droplets, generated at high frequency. Within each droplet, the peptides can interact with different classes of co‐encapsulated liposomes, generating a membrane‐specific fluorescent signal. The double emulsions can be incubated and observed in a hydrodynamic trapping array or analyzed via flow cytometry. Our approach provides a valuable tool for the discovery and development of membrane‐active antimicrobials.

Online Resource

0044-8249, 1521-3757

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Wiley

2022

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Angewandte Chemie, Wiley, Vol. 134, No. 12 ( 2022-03-14)

Distinguishing the operating mechanisms of nano‐ and micromotors powered by chemical gradients, i.e. “autophoresis”, holds the key for fundamental and applied reasons. In this article, we propose and experimentally confirm that the speeds of a self‐diffusiophoretic colloidal motor scale inversely to its population density but not for self‐electrophoretic motors, because the former is an ion source and thus increases the solution ionic strength over time while the latter does not. They also form clusters in visually distinguishable and quantifiable ways. This pair of rules is simple, powerful, and insensitive to the specific material composition, shape or size of a colloidal motor, and does not require any measurement beyond typical microscopy. These rules are not only useful in clarifying the operating mechanisms of typical autophoretic micromotors, but also in predicting the dynamics of unconventional ones that are yet to be experimentally realized, even those involving enzymes.

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0044-8249, 1521-3757

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Wiley

2022

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physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 34, No. 1 ( 1969-01), p. 315-318

Ferromagnetic resonance is observed in the 1.25 cm microwave band in polycrystalline hematite samples after subjecting them to high‐temperature pulses in air. The intensity and width of the resonance line are found to depend on the duration of the horizontal part of the pulse and on the cooling rate. This ferromagnetic resonance absorption is shown to be related with the formation of a ferromagnetic phase structurally identic with magnetite.

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 11 ( 2022-03-07)

A pentabenzopentaaza[10]circulene has been synthesized as the largest fully conjugated hetero[ n ]circulene via a fold‐in oxidative fusion reaction of an ortho‐phenylene‐bridged cyclic pyrrole pentamer. This circulene takes a saddle‐distorted structure with bond lengths of the central ten‐membered‐ring in the range of 1.455–1.493 Å. Relatively broad absorption and fluorescence spectra were observed, which reflects its flexible structure, in accordance with the low‐temperature NMR spectra and theoretical calculations. The energy barrier for saddle‐to‐saddle interconversion was estimated to be quite small (≈3 kcal mol −1 ).

Online Resource

0044-8249, 1521-3757

English

Wiley

2022

505868-5

506609-8

514305-6

505872-7

1479266-7

505867-3

506259-7

physica status solidi (b), Wiley, Vol. 34, No. 2 ( 1969-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1969

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 12 ( 2022-03-14)

Despite the high potential of controlling cellular processes and treating various diseases by intracellularly delivered proteins, current delivery systems exhibit poor efficiency due to poor serum stability, cellular entry, and cytosolic availability of proteins. Here, we report a novel functional group, phenyl carbamoylated guanidine (Ph‐CG), that greatly enhances the delivery efficiency to various types of cells. Owing to the substantially lowered p K a , the hydrophobic Ph‐CG offers optimized inter‐macromolecular interactions via enhanced hydrogen‐bonding and hydrophobic interactions. The coplanarity of Ph‐CG also leads to the better intracellular entry of protein complexes. Intracellularly delivered apoptosis‐inducing enzymes and antibodies significantly induce cell viability inhibitions in a serum‐containing medium. The newly developed Ph‐CG can be introduced to various existing carriers, leading to the realization of future therapeutic protein delivery.

Online Resource

0044-8249, 1521-3757

English

Wiley

2022

505868-5

506609-8

514305-6

505872-7

1479266-7

505867-3

506259-7