Results 41 to 50 of about 15,945 (209)

Mimicking Life: Autonomous Oscillating Artificial Cilia Driven by Chemical Power

Advanced Intelligent Systems, EarlyView.
The synthesis and motion analysis of chemically actuated, individually autonomous artificial cilia are presented. Driven by an internal chemical reaction, the self‐driven individual cilia require no external stimuli. They undergo periodic oscillatory motion with a 3D beat pattern and exhibit chemotactic shifts, reminiscent of biological systems.
Rajata Suvra Chakrovorty, Yaqeen Salatneh Ashqer, Suzanne Ahmed   +2 more
wiley   +1 more source

Synthesis, Structure, and Reactivity of a Magnesium(0) Complex with a Polarized Mgδ−─Caδ+ Bond

Angewandte Chemie, EarlyView.
Mixing metals: The elusive unsupported two‐center‐two‐electron Mg─Ca bond has been realized by using a combination of β‐diketiminate and amidinate ligands. Due to electronegativity differences (Mg: 1.31, Ca: 1.00) the formal oxidation states are Mg0─CaII.
Sandeep Kumar Thakur, Jens Langer, Nil Roig, A. Ganesh Patro, Marcel A. Schmidt, Mercedes Alonso, Sjoerd Harder   +6 more
wiley   +2 more sources

Group IB organometallic Chemistry. XXXV. Crystal and molecular structure of [Cu4{4-MeC6H4)MeC=C(C6H4NMe2-2)}2(C6H4NMe2-2)2], a tetranuclear organo-copper compound containing bridging alkenyl and aryl groups

, 1982
The crystal and molecular structure of the title compound has been determined by a single crystal X-ray diffraction study using standard Patterson and Fourier methods. The structure was refined by a block-diagonal least-square procedure to a final R value of 0.16 for 3454 reflections. Crystals are monoclinic, space group P2{1}/c, with a 14.007(5), b 12.
Koten, G. van, Noltes, J.G., Hoedt, R.W.M. ten, Spek, A.L., Schoone, J.C.   +4 more
openaire   +1 more source

Group IB Organometallic Chemistry XXXIII: ArAuPPh3, ArAu(CNR), (ArAu)n and Ar4Cu2Au2 compounds in which the aryl group contains 2-MeO, 2,6-(MeO)2, 2-Me2N, 2-Me2NCH2 and (S)- or (R)-2-Me2NCHMe substituents as potential ligands

, 1980
The synthesis and structural characterization by }1{H NMR and }1{}9{}7{Au Mossbauer spectroscopy as well as by chiral labelling of the built-in ligands of three different types of arylgold(I) compounds is described.}1{}9{}7{Au Mossbauer data revealed that the benzyl- and arylgold(I) triphenylphosphine complexes which bear potential coordinating ...
Koten, G. van, Schaap, C.A., Jastrzebski, J.T.B.H., Noltes, J.G.   +3 more
openaire   +2 more sources

Formation of a 14‐Electron Intermediate in Iridium Catalysis through Reductive Elimination: Dissociation Is Rate Determining

ChemistryEurope, EarlyView.
Dynamic NMR and trapping studies reveal that POCOP–Ir phenyl hydride complexes perform reductive coupling rapidly but dissociate benzene slowly. PCP–Ir analogs show comparatively slow reductive coupling and faster dissociation. This work experimentally clarifies aspects of C–H reductive elimination in iridium pincer complexes.(POCOP = bisphosphinite ...
Alice Spangenberg, Ola F. Wendt
wiley   +1 more source

Advances in Parahydrogen‐Induced Polarization for Nuclear Magnetic Resonance of Peptides, Proteins, and Biopolymers

ChemistryEurope, EarlyView.
Hyperpolarization by parahydrogen‐induced polarization enhances the sensitivity of nuclear magnetic resonance spectroscopy of amino acids, peptides, mini‐proteins, and biopolymers using nonnatural amino acids with unsaturated side chains up to three orders of magnitude.
Gerd Buntkowsky
wiley   +1 more source

Covalent Attachment of a Platinum(II) Complex inside DNA Duplexes

ChemistryEurope, EarlyView.
Oxidative addition is used for the site‐specific incorporation of an organometallic PtII complex as an artificial nucleobase into a DNA duplex. The platination stabilizes the duplex and confers it with phosphorescence. An organometallic phosphorescent PtII complex is introduced into DNA duplexes via oxidative addition to a tailor‐made artificial ...
Tim Schäfer, Iván Maisuls, Felix Boisten, Marian Hebenbrock, Alexander Hepp, Cristian A. Strassert, Jens Müller   +6 more
wiley   +1 more source

Protonation‐Induced Electron Density Redistribution Facilitates Aggregation in PNNP Dicopper Hydride Complexes

Chemistry – A European Journal, EarlyView.
Copper(I) hydride complexes often exhibit diverse aggregation behavior that can profoundly influence their structure and reactivity. In this study we use a combined experimental and computational approach to identify key structural an electronic factors that govern aggregation in PNNP dicopperhydride complexes.
Roel Laurentius Maria Bienenmann, Chattawat Thangsrikeattigun, Alexandra Julia Schanz, Martin Lutz, Mu‐Hyun Baik, Daniël Laurens Johannes Broere   +5 more
wiley   +1 more source

One‐Pot Transition‐Metal‐Free Methods for the Synthesis of All Three Bonds of the Alkyne's Triple Bond

Chemistry – A European Journal, EarlyView.
One‐pot transition‐metal‐free methods for the synthesis of all three bonds of the alkyne's triple bond are reviewed. After analysis of several named reactions and discussion of improvements, recent advances in the synthesis of alkynes are discussed. Each section contains a proposed reaction mechanism and analysis of the strengths and weaknesses of the ...
Eugene Kim, Yu Wu, Judith N. Currano, Jianyou Mao, Patrick J. Walsh   +4 more
wiley   +1 more source

Regio‐ and Diastereoselective C–C Silylation of Cyclopropyl Acetates Harnessing Fluorinated Poly(pyridyl)Borate Rhodium Catalysts

Chemistry – A European Journal, EarlyView.
Fluorinated poly(pyridyl)borates have been utilized to stabilize rhodium‐diene complexes and as supporting ligands in rhodium‐catalyzed redox‐neutral C–C silylation of cyclopropyl acetates, producing silicon‐containing heterocyclic products, dioxasilolanes.
Vo Quang Huy Phan, Suman Das Adhikary, Junha Jeon, H. V. Rasika Dias   +3 more
wiley   +1 more source