Results 21 to 30 of about 8,724 (213)

Site-selective electrochemical carboxylation of aromatic C(sp2)–H bonds with CO2

Current Research in Green and Sustainable Chemistry, 2023
We present a facile and economical method for synthesizing aromatic carboxylic acid derivatives through direct electrochemical C(sp2)–H carboxylation of (hetero)arenes with CO2.
Rong Zhao, Max Surke, Zhipeng Lin, Ali Alsalme, Lutz Ackermann   +4 more
doaj   +1 more source

Thermo-Responsivity of the Polyacrylate-Adsorbed Metal Cation and its Hydration Structure

Adsorption Science & Technology, 2008
The thermo-responsive phase behaviour of the sodium salt of poly(acrylic acid) (PAA) was studied when its counter-ion was exchanged for a series of metal cations (PAA–metal cation complexes).
Yoshimi Seida, Takahiro Imai, Kiyoshi Murata, Yoshio Nakano   +3 more
doaj   +1 more source

MIXED-METAL COMPLEXES OF RUTHENIUM(II,III) CARBOXYLATE AND TETRACYANIDOPLATINATE(II) [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2015
Mixed-metal complexes constructed from dinuclearruthenium(II,III) carboxylates and tetracyanidoplatinate(II), [{Ru2(O2CCH3)4}2Pt(CN)4]•2H2O (1) and [{Ru2{O2CC(CH3)3}4}2Pt(CN)4]•2H2O (2), were synthesized and characterized by elemental analysis and IR and
Masahiro Mikuriya, Kenta Ono, Shun Kawauchi, Daisuke Yoshioka, Ryoji Mitsuhashi, Makoto Handa   +5 more
doaj  

Rethinking enrichments of trace element in low-rank coals: Preliminarily quantifying the effectiveness of local structure to stabilize humates

Energy Exploration & Exploitation, 2018
Trace element enrichment in coals has increasingly been focused in the community of coal geochemistry. To research the enrichment mechanism of trace element in coals on molecular/atomic scale is an important complement of field investigations, but ...
Le-Cai Xing, Hong-Tao He, Bo-Hui Xu, Jing-Sen Zhang, Zhi-Feng Yan, Chao Jin, Jing Li, Lang-Tao Liu   +7 more
doaj   +1 more source

The synergistic influence of metal cations on the drying and viscosity of linseed oil assessed by means of model samples containing synthesised metal carboxylates

Heritage Science
The recent multi-analytical study carried out on the Van Eyck’s Ghent Altarpiece showed the simultaneous presence of several kinds of metal carboxylates in oil-rich glaze layers.
S. Kirkpatrick, J. Sanyova, K. Janssens, G. Van der Snickt   +3 more
doaj   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Heavy metal biosorption sites in Penicillium cyclopium

Journal of Applied Sciences and Environmental Management, 2006
The biomass of Penicillium cyclopium was subjected to chemical treatment to study the role of the functional groups in the biosorption of heavy metal ions. The modifications of the functional groups were examined with infrared spectroscopy.
Kolishka Tsekova, Darinka Christova, Maria Ianis   +2 more
doaj   +1 more source

C2α‐carbanion‐protonating glutamate discloses tradeoffs between substrate accommodation and reaction rate in actinobacterial 2‐hydroxyacyl‐CoA lyase

FEBS Open Bio, EarlyView.
Enzymes of the 2‐hydroxyacyl‐CoA lyase group catalyze the condensation of formyl‐CoA with aldehydes or ketones. Thus, by structural adaptation of active sites, practically any pharmaceutically and industrially important 2‐hydroxyacid could be biotechnologically synthesized. Combining crystal structure analysis, active site mutations and kinetic assays,
Michael Zahn, Barbara Seroka, Ryszard Lazny, Zenon Lotowski, Thore Rohwerder   +4 more
wiley   +1 more source

Coordinative Compounds Based on Unsaturated Carboxylate with Versatile Biological Applications

Molecules
This review presents an overview of the biological applications of coordinative compounds based on unsaturated carboxylates accompanied by other ligands, usually N-based heterocyclic species.
Gina Vasile Scaeteanu, Mihaela Badea, Rodica Olar   +2 more
doaj   +1 more source

Nanoporous Frameworks with High Porosity and Unexpected Rigid Framework Topologies Based on Odd‐Numbered Ring‐Expanded Linkers

Small Science, 2023
Two tetracarboxylic linkers containing seven‐membered rings are synthesized and utilized in metal–organic framework (MOF) syntheses, leading to the two new compounds DUT‐184 and DUT‐193.
Bodo Felsner, Karuppasamy Gopalsamy, Volodymyr Bon, Irena Senkovska, Guillaume Maurin, Stefan Kaskel   +5 more
doaj   +1 more source