established the importance of complexation by organic ligands in determining the bioavailability of trace metals to marine phytoplankton, while electrochemical measurements with field samples have demonstrated that a large fraction of bioactive trace metals are complexed to strong organic ligands in seawater....
Give the number of unpaired electrons in octahedral complexes with weak-field ligands for Mo2+. Give the number of unpaired electrons in octahedral complexes with weak-field ligands for Co3+. Give the numbe...
The new mixed-mode phases overall exhibit reasonable hydrophilicity-lipophilicity balance and enable retention of ionic compounds by additional ionic interactions through weak anion-exchange (WAX-type), strong cation-exchange (SCX-type) or both (RP/ZWIX-type). Hence, the new RP/ZWIX phases can ...
corresponding to a highly alkaline solution, did the oxime nitrogen from two of the chelating AO−ligands lose a proton during the first 2 ps of AIMD, affording the neutral [V(AO)(H−1AO)2] complex depicted in Fig.2b. In striking contrast to cyclic imide-dioxime (H3IDO), the...
In water, a unique complex of [Co(H2O)5(DCA)] exhibiting a weak complexation constant (K = 20.5) is observed. In the ionic liquid, cobalt is shown to coordinate with up to four dicyanamide anions. All species coexist until the ratio R reaches 5000, where more than 90% of the fourth...
Each one of the ligands interacts with the substance during the adsorption step, and at least one of the ligands is charged and capable of ionic interaction with the substance. The method can be run as a cation or anion exchange. The substance desorption can be performed by adding an eluent...
In water, a unique complex of [Co(H2O)(5)(DCA)](+) exhibiting a weak complexation constant (K =20.5) is observed. In the ionic liquid, cobalt is shown to coordinate with up to four dicyanamide anions. All species coexist until the ratio R reaches 5000, where more than 90% of the ...