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Flüssigkristalline aromatische Cholesterin-Derivate
Die Cholesterin-Abkömmlinge lieferten im letzten Jahrhundert die ersten bekannten Flüssigkristalle [1], Weil sie leichter zugänglich waren und ein höheres Verdrillungsvermögen besaßen als andere bekannte chirale Flüssigkristalle (z. B. Abkömmlinge des natürlichen sekundären Amylalkohols), stellten sie bis weit in die siebziger Jahre dieses Jahrhunderts auch die wichtigste Quelle für chirale Flü...
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Electrical sensitivity of a Boron Nitride Nano Sheet (BNNS) to phosphine (PH3) molecule is studied using Density Functional Theory (DFT) calculations at the B3LYP/6-31G(d) level of theory. The adsorption energy (Ead) of phosphine on the surface of the pristine Nanosheet is about -678.96×1019eV. Pristine BNNS is a suitable adsorbent for phosphine and can be u...
متن کاملPhosphine Toxicological overview
Inhaled phosphine is absorbed rapidly from the lungs and distributed round the body Inhaled or ingested zinc, aluminium and magnesium phosphides release phosphine into the respiratory tract and stomach; zinc phosphide can be absorbed intact from the gut Dermal absorption of phosphine or phosphides is not considered a significant route of exposure The majority of absorbed phosphine is ex...
متن کاملTris(2-methoxyphenyl)phosphine
In the title compound, C(21)H(21)O(3)P, the whole mol-ecule is disordered over two sets of positions with refined occupancies of 0.503 (1) and 0.497 (1). The dihedral angles between the three benzene rings are 72.9 (2)°, 82.9 (3)° and 70.0 (2)° in the major disorder component and the corresponding angles in the minor disorder component are 85.0 (2)°, 79.2 (2)° and 72.3 (2)°. The crystal structu...
متن کاملOrigin of Catalytic Activity Differences between Phosphine and Phosphine Oxide-Based Structures in the Water-Crosslinkable Polyalkoxysilane Composition
Organocatalysts have attracted enormous interest in the water-crosslinking reaction in silane-grafted polyolefins (SGPOs) system owing to their simplicity, low toxicity and environmentally benign nature compared to organotin catalysts, which are most used in SGPOs system. We focus on organophosphorus compounds including four structure types as organocatalysts; phosphoric acids, phosphoric ester...
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ژورنال
عنوان ژورنال: Berichte der deutschen chemischen Gesellschaft
سال: 1872
ISSN: 0365-9496,1099-0682
DOI: 10.1002/cber.18720050138