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Angewandte Chemie, Wiley, Vol. 134, No. 2 ( 2022-01-10)

Intramolecular noncovalent interactions (INIs) have served as a powerful strategy for accessing organic semiconductors with enhanced charge transport properties. Herein, we apply the INI strategy for developing dopant‐free hole‐transporting materials (HTMs) by constructing two small‐molecular HTMs featuring an INI‐integrated backbone for high‐performance perovskite solar cells (PVSCs). Upon incorporating noncovalent S⋅⋅⋅O interaction into their simple‐structured backbones, the resulting HTMs, BTORA and BTORCNA, showed self‐planarized backbones, tuned energy levels, enhanced thermal properties, appropriate film morphology, and effective defect passivation. More importantly, the high film crystallinity enables the materials with substantial hole mobilities, thus rendering them as promising dopant‐free HTMs. Consequently, the BTORCNA‐based inverted PVSCs delivered a power conversion efficiency of 21.10 % with encouraging long‐term device stability, outperforming the devices based on BTRA without S⋅⋅⋅O interaction (18.40 %). This work offers a practical approach to designing charge transporting layers with high intrinsic mobilities for high‐performance PVSCs.

Online Resource

0044-8249, 1521-3757

English

Wiley

2022

505868-5

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1479266-7

505867-3

506259-7

Angewandte Chemie, Wiley, Vol. 134, No. 3 ( 2022-01-17)

Chemical fixation of carbon dioxide (CO 2 ) into value‐added organics is regarded as a competitive and viable method in large scale industrial production, during which the catalysts with promoting CO 2 activation ability are needed. Herein, we proposed an in‐plane heterostructure strategy to construct Lewis acid–base sites for efficient CO 2 activation. By taking ultrathin in‐plane Cu 2 O/Cu heterostructures as a prototype, we show that Lewis acid‐base sites on heterointerface can facilitate a mixed C and O dual coordination on surface, which not only strengthen CO 2 adsorption, but also effectively activate the inert molecules. As revealed by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and quasi in situ X‐ray photoelectron spectroscopy (XPS), Lewis acid‐base sites could readily activate CO 2 to . CO 2 − species, which is the key intermediate radical for CO 2 fixation. As a result, abundant Lewis acid–base sites endow Cu 2 O/Cu nanosheets with excellent performances for dimethyl carbonate generation, a high conversion yield of 28 % with nearly 100 % selectivity under mild conditions. This study provides a model structure for CO 2 fixation reactions.

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. 30, No. 1 ( 1968), p. 67-72

Online Resource

0370-1972, 1521-3951

German

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 507-514

The effect of fields of lower symmetry (in the crystal field approximation) on the energy levels of trivalent chromium ions in the zinc tungstate lattice is discussed. Calculations show that the optical spectra previously reported [1] can be interpreted in terms of a field of rhombic symmetry acting on the Cr 3+ ion provided we include the effects of tetragonal distortion in the excited states.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 3 ( 2022-01-17)

Polar disconnection of the C(sp 3 )−N bond of N,N‐dialkyl‐substituted tertiary amines via ammonium species conventionally favored the loss of the smaller alkyl group by an S N 2 displacement, while selective C(sp 3 )−N bond cleavage by cutting off the larger alkyl group is still underdeveloped. Herein, we present a novel Pd 0 ‐catalyzed [2+2+1] annulation, proceeding through an alkyne‐directed palladacycle formation and consecutive diamination with a tertiary hydroxylamine by cleaving its N−O bond and one C(sp 3 )−N bond, for the rapid assembly of tricyclic indoles in a single‐step transformation. Noteworthy, experimental results indicated that large tert‐butyl and benzyl groups were selectively cleaved via an S N 1 pathway, in the presence of a smaller alkyl group (Me, Et, i Pr). Under the guidance of this new finding, tricyclic indoles bearing a removable alkyl group could be exclusively obtained by using a (α‐methyl)benzyl/benzyl or tert‐butyl/2‐(methoxycarbonyl)ethyl mixed amino source.

Online Resource

0044-8249, 1521-3757

English

Wiley

2022

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physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 525-531

Optical experiments have enabled measurements of the absorption coefficient of n‐type GaAs to be made at room temperature near the absorption edge by an acoustoelectric domain located at the anode. Moreover, the shape of the domain can be deduced and in addition the acoustic flux is shown to be an important factor in the variations of the absorption coefficient. Some results are also given of local resistivity variations in n‐type GaAs by the injection of free carriers when a GaAs laser beam is focused on the sample.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 587-600

The influence of various potentials and elastic boundary‐conditions on the 1. core‐structure, 2. core‐radius and core‐energy, 3. Peierls‐stress of a straight (110), 1/2 [1 1 0]‐edge dislocation in NaCl is studied using a variational method.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 601-612

The theory of the electron‐phonon coupling for impurity centres in ionic crystals is reviewed in order to point out the most significant parameters involved in the optical properties of the zero‐phonon lines. The absorption and emission spectra of alkali halides doped with Eu ++ and Sm ++ have been measured for temperatures ranging from 15 up to 175°K. In general the analysis of the experimental data agrees fairly well with the theory. The Huang‐Rhys factor has been determined and also the effective frequencies which are responsible for the thermal behaviour of the spectra. However the electron‐phonon interaction alone has been found not to be sufficient in order to explain the thermal dependence of the zero‐phonon line strength and an additional mechanism for its thermal de‐excitation has been proposed.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 619-625

By considering the exchange interaction of electrons an additional term in the two‐body equation for excitons is obtained leading to an essential modification of the exciton spectrum. By means of this term the zero‐field splitting of the exciton lines as well as the deviations from the hydrogen‐like spectra can be interpreted.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

Physica Status Solidi (b), Wiley, Vol. 30, No. 1 ( 1968), p. 135-146

Online Resource

0370-1972, 1521-3951

German

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 645-658

Punktdefekte werden durch Kräftemultipole beschrieben und ihre Wechselwirkung mit Hilfe der Elastizitätstheorie untersucht. Explizite Ausdrücke werden für die Wechselwirkungsenergie in elastisch isotropen Stoffen abgeleitet. Für Defekte mit kubischer Symmetrie in k.f.z. Kristallen sind die von Hardy und Bullough für ein spezielles isotropes Modell ( v = ∞) erhaltenen gittertheoretischen Werte 25% größer als die elastizitätstheoretischen. Beide zeigen jedoch dieselbe Winkelabhängigkeit und beide fallen mit r −5 ab. Durch Bestimmung nicht nur des ersten (elastischen) sondern auch des zweiten Terms einer asymptotischen Entwicklung der gittertheoretischen Green'schen Funktion läßt sich zeigen, daß dieser Unterschied von 25% ein wirklicher Gittertheorie‐Effekt ist.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 671-683

Der Mößbauereffekt in einem einfachen kubischen Gitter mit einem linearen Defekt wird für Atome innerhalb und außerhalb des gestörten Gebietes untersucht. Numerische Berechnungen der Änderungen des Debye‐Waller‐Faktors werden für einen speziellen Defekt (Änderung der Massen‐ und Bindungskonstanten in einer Atomreihe in der [001]‐Richtung) in einer klassischen Näherung zusammen mit den quantenmechanischen Korrekturen durchgeführt. Es werden zwei Berechnungsmethoden benutzt: eine Entwicklung gültig für hohe und die andere für alle Temperaturen. Die Möglichkeit des Gebrauchs von Graphen für manche Abschätzungen, besonders für die Abhängigkeit der quantenmechanischen Korrektur zum Debye‐Waller‐Faktor von der Entfernung des absorbierenden Atoms vom linearen Defekt, wird vorgeschlagen.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

Physica Status Solidi (b), Wiley, Vol. 30, No. 1 ( 1968), p. 163-172

Online Resource

0370-1972, 1521-3951

German

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01), p. 723-734

Es wird die statistische Thermodynamik des Elektronengases in dispersen Metallen entwickelt. Die Annahmen sind folgende: Die Einteilchenzustände besitzen den Verteilungscharakter, der durch einen der drei möglichen Dysonschen Gesamtheiten mit dem mittleren Niveauabstand δ beschrieben wird. Dieser Wert ist von der Größenordnung der Fermienergie, geteilt durch die Gesamtzahl der Elektronen mit möglichen Oberflächenkorrekturen. Die thermodynamischen Funktionen werden explizit für zwei gegensätzliche Fälle berechnet: für kT viel größer als δ und für kT viel kleiner als δ. Auf diesem Wege werden die Ergebnisse von Kubo und von Gorkov und Eliashberg erweitert. Die Anwendungsmöglichkeit dieser Theorie auf Übergangsmetalle wird ebenfalls diskutiert.

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

Angewandte Chemie, Wiley, Vol. 134, No. 6 ( 2022-02)

Microbial infections have become a great threat to human health and one of the main risks arises from direct contact with the surfaces contaminated by pathogenic microbes. Herein, a kind of hexagonal column interpenetrated spheres (HCISs) are fabricated by non‐covalent assembly of plant gallic acid with quaternary ammonium surfactants. Different from one‐time burst release of conventional antimicrobial agents, the HCIS acts like a “antimicrobial molecular bank” and releases the antimicrobial ingredients in a multistage way, leading to long‐lasting antimicrobial performance. Taking advantage of strong hydrophobicity and adhesion, HCISs are applicable to various substrates and endowed with anti‐water washing property, thus showing high in vitro antimicrobial efficiency ( 〉 99 %) even after being used for 10 cycles. Meanwhile, HCISs exhibit broad‐spectrum antimicrobial activity against bacteria and fungi, and have good biocompatibility with mammalian cells. Such a low‐cost and portable long‐lasting antimicrobial agent meets the growing anti‐infection demand in public spaces.

Online Resource

0044-8249, 1521-3757

English

Wiley

2022

505868-5

506609-8

514305-6

505872-7

1479266-7

505867-3

506259-7

Angewandte Chemie, Wiley, Vol. 133, No. 51 ( 2021-12-13), p. 26617-26617

Online Resource

0044-8249, 1521-3757

English

Wiley

2021

505868-5

506609-8

514305-6

505872-7

1479266-7

505867-3

506259-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7

physica status solidi (b), Wiley, Vol. 30, No. 2 ( 1968-01)

Online Resource

0370-1972, 1521-3951

English

Wiley

1968

208851-4

1481096-7