Results 91 to 100 of about 95,078 (410)

Anomalous phosphine sensitivity coefficients as probes for a possible variation of the proton-to-electron mass ratio [PDF]

Mon. Not. R. Astron. Soc. 473, 4986 (2018), 2018
A robust variational approach is used to investigate the sensitivity of the rotation-vibration spectrum of phosphine (PH$_3$) to a possible cosmological variation of the proton-to-electron mass ratio, $\mu$. Whilst the majority of computed sensitivity coefficients, $T$, involving the low-lying vibrational states acquire the expected values of $T\approx-
arxiv   +1 more source

Kinetics of hydroformylation of 1-octene in ionic liquid-organic biphasic media using rhodium sulfoxantphos catalyst [PDF]

, 2011
Biphasic hydroformylation of 1-octene was performed using rhodium sulfoxantphos catalyst dissolved in [BuPy][BF4] ionic liquid. Preliminary experiments proved this system to retain the catalytic complex within the ionic liquid phase and to maintain a ...
Delmas, Henri, Deshpande, Raj M., Julcour-Lebigue, Carine, Kelkar, Ashutosh A., Sharma, Amit   +4 more
core   +1 more source

Programmable Liquid Crystal Elastomers Via Magnetic Field Assisted Oligomerization

Advanced Functional Materials, EarlyView.
This article presents a straightforward method for designing programmable liquid crystal elastomer (LCE) actuators using magnetic field alignment. It combines thio‐Michael polyaddition for efficient LCE synthesis with a strategy that preserves the nematic phase, enabling the alignment of high molecular weight LCOs.
Rakine Mouhoubi, Vincent Lapinte, Sébastien Blanquer   +2 more
wiley   +1 more source

Sterically restricted tin phosphines, stabilized by weak intramolecular donor-acceptor interactions [PDF]

, 2014
Funding: Engineering and Physical Sciences Research Council (EPSRC)Four related sterically restricted pen-substituted acenaphthenes have been prepared containing mixed tin phosphorus moieties in the proximal 5,6-positions (Acenap[SnR3][(PPr2)-Pr-i ...
Arachchige, Kasun S. Athukorala, Ashbrook, Sharon E., Buehl, Michael, Camacho, Paula Sanz, Chalmers, Brian A., Kilian, Petr, Knight, Fergus R., Ray, Matthew J., Slawin, Alexandra M. Z., Woollins, J. Derek   +9 more
core   +4 more sources

Spin‐Selective Anisotropic Magnetoresistance Driven by Chirality in DNA

Advanced Functional Materials, EarlyView.
It is shown that magnetoresistance (MR) measurements carried out as a function of angular dependence between the magnetic field and a chiral (DNA) interface provide a valuable new insight into the charge transport mechanism associated with the chiral‐induced spin selectivity (CISS) effect.
Tapan Kumar Das, Naupada Preeyanka, Suryakant Mishra, Yutao Sang, Claudio Fontanesi   +4 more
wiley   +1 more source

Tris(2,4,6-trimethoxyphenyl)phosphine (TTMPP): Efficient Catalysts for the Cyanosilylation and Cyanocarbonation of Aldehydes and Ketones

Molecules, 2009
A variety of aldehydes and ketones were transformed to their corresponding cyanohydrin silyl ethers in good to excellent yields in the presence of 1-5 mol% of tris(2,4,6-trimethoxyphenyl)phosphine (TTMPP).
Satoru Matsukawa, Izumi Sekine, Ayumi Iitsuka   +2 more
doaj   +1 more source

Mixed‐Dimensional 0D‐DNA‐2D Heterostructures Beyond van der Waals: A DNA‐Templated Strategy for Optoelectronic Tunability

Advanced Functional Materials, EarlyView.
A two‐step DNA metallization process is presented for the modular assembly of metal sulfide nanoparticles (NPs) on MoS2, with nanoscale control over their separation and ability to concomitantly assemble different kind of NPs. This allowed to tailor the photoinduced electrical response of phototransistors to different wavelengths, according to the ...
Kai Chen, Haosen Miao, Stoichko Dimitrov, Matteo Palma   +3 more
wiley   +1 more source

Application of Phosphine-Phosphite Ligands in the Iridium Catalyzed Enantioselective Hydrogenation of 2-Methylquinoline

Molecules, 2010
The hydrogenation of 2-methylquinoline with Ir catalysts based on chiral phosphine-phosphites has been investigated. It has been observed that the reaction is very sensitive to the nature of the ligand. Optimization of the catalyst, allowed by the highly
Miguel Rubio, Antonio Pizzano
doaj   +1 more source

Tetramethylphosphinane as a new secondary phosphine synthon

Communications Chemistry, 2023
Secondary phosphines are important building blocks in organic chemistry as their reactive P—H bond enables construction of more elaborate molecules. In particular, they can be used to construct tertiary phosphines that have widespread applications as ...
James D. Nobbs, Sigit Sugiarto, Xin Yi See, Choon Boon Cheong, Srinivasulu Aitipamula, Ludger P. Stubbs, Martin van Meurs   +6 more
doaj   +1 more source

Hypothesis Perspectives: Might active volcanisms today contribute to the presence of phosphine in Venus's atmosphere? [PDF]

arXiv, 2020
We propose an abiotic geological mechanism that accounts for the abundance of phosphine detected by Greaves et al., 2020. We hypothesize that trace amounts of phosphides formed in the mantle would be brought to the surface by volcanism, and then subsequently ejected into the atmosphere, where they could react with water or sulfuric acid to form ...
arxiv