catena-Poly[(diaqua­cadmium)-μ-4,4′-[sulfonyl­bis­(1,4-phenyl­ene­oxy)]­di­acet­ato-κ4 O,O′:O′′,O′′′]

In the title coordination polymer, [Cd(C16H12O8S)(H2O)2]n, the CdII ion is situated on a crystallographic twofold rotation axis, being coordinated by four O atoms from two bidentate 4,4′-[sulfonyl­bis­(1,4-phenyl­ene­oxy)]diacetate (L) ligands and two water mol­ecules in a highly distorted CdO6 octa­hedral geometry. Each complete ligand L, which is also generated by twofold symmetry with the S atom lying on the rotation axis, bridges two CdII atoms to form a polymeric zigzag chain propagating in the [10-1] direction. O—H⋯O hydrogen bonds between the coordinated water mol­ecules and carboxyl­ate O atoms are involved in the packing

(E)-N′-(3,4-Dimethoxy­benzyl­idene)-2-(8-quinol­yloxy)acetohydrazide–methanol–water (1/1/1)

In the title compound, C20H19N3O4·CH4O·H2O, the Schiff base mol­ecule is almost planar, with a dihedral angle of 1.2 (1)° between the benzene ring and the quinoline ring system. An intra­molecular N—H⋯O hydrogen bond generates an S(6) ring. In the crystal, the methanol and water solvent mol­ecules are linked to the Schiff base mol­ecule via N—H⋯O, O—H⋯O, O—H⋯N and O—H⋯(O,N) hydrogen bonds

Mantle Transition Zone Structure Beneath Northeast Asia From 2‐D Triplicated Waveform Modeling: Implication for a Segmented Stagnant Slab

The structure of the mantle transition zone (MTZ) in subduction zones is essential for understanding subduction dynamics in the deep mantle and its surface responses. We constructed the P (V_p) and SH velocity (V_s) structure images of the MTZ beneath Northeast Asia based on two‐dimensional (2‐D) triplicated waveform modeling. In the upper MTZ, a normal V_p but 2.5% low V_s layer compared with IASP91 are required by the triplication data. In the lower MTZ, our results show a relatively higher‐velocity layer (+2% V_p and −0.5% V_s compared to IASP91) with a thickness of ~140 km and length of ~1,200 km atop the 660‐km discontinuity. Taking this anomaly as the stagnant slab and considering the plate convergence rate of 7–10 cm/year in the western Pacific region during the late Cenozoic, we deduced that the stagnant slab has a subduction age of less than 30 Ma. This suggests that the observed stagnancy of the slab in the MTZ beneath Northeast Asia may have occurred no earlier than the Early Oligocene. From the constraints derived individually on V_p and V_s structures, high V_p/V_s ratios are obtained for the entire MTZ beneath Northeast Asia, which may imply a water‐rich and/or carbonated environment. Within the overall higher‐velocity stagnant slab, a low‐velocity anomaly was further detected, with a width of ~150 km, V_p and V_s reductions of 1% and 3% relative to IASP91. Such a gap may have provided a passage for hot deep mantle materials to penetrate through the thick slab and feed the Changbaishan volcano

Effect of particle size and surface charge on nanoparticles diffusion in the brain white matter

This project has received funding from the European Unions Horizon 2020 research and innovation programme under Grant Agreement No. 688279. Daniele Dini would like to acknowledge the support received from the EPSRC under the Established Career Fellowship Grant No. EP/N025954/1. Tian Yuan would also like to acknowledge financial support from CSC Imperial Scholarship. The authors declare that they have no conflict of interest.Peer reviewedPublisher PD