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The hydrothermal reaction of Cu(OAc)2 · H2O with thiophene-2,5-dicarboxylic acid (H2tdc) and 4,4′-bipyridine (bpy) gave a copper(II) coordination polymer {[Cu(tdc)(bpy)(H2O)](bpy)}n (1), in which the (4,4) layers are assembled via strong hydrogen bonds between the aqua ligands and the uncoordinated carboxylate oxygen atoms into a porous 3-D molecular architecture with parallelogrammic channels. The guest bpy molecules reside in the channels, involving intermolecular C–H⋯N hydrogen bonds with the host framework, can be removed upon heating at reduced pressure. [Copyright &y& Elsevier]

Black phosphorus (BP) has been recognized as an ideal anode material for fast‐charging lithium (Li)‐ion capacitors (LICs) due to its high theoretical capacity (2596 mAh g−1), appropriate lithiation potential (0.7 V vs Li+/Li) and fast ion diffusion capability. However, large volume change and soluble polyphosphides (LixPs)‐based intermediates during charging‐discharging process seriously deteriorate cycling performance. To address the aforementioned issues, an elaborated design is reported on the binder for BP electrode. The ‐NH2 polar functional group in grafted chitosan (GCS) binder presents strong chemical anchoring effect for both BP and soluble LixPs, achieving superior adhesion force and LixPs constraining capability for enhanced structure integrity of BP electrode. In addition, GCS exhibits strong Li‐ion binding energy that promotes the Li‐ion adsorption at electrode level, leading to a boosted cycle life for BP. As a result, the graphene (G) incorporated BP electrode using GCS binder shows specific capacity of 997.6 mAh g−1 after 400 cycles at 1 A g−1. This study unravels the crucial role of functional groups for binder in high‐performance BP electrode. [ABSTRACT FROM AUTHOR]

The title compound, C28H22N4O2, was synthesized by the reaction of 4-benzoyl-3-methyl-1-phenyl­pyrazol-5-one and 1-naphthoylhydrazide. The mol­ecules are connected via inter­molecular N—H⋯N hydrogen bonds into a one-dimensional chain structure. [ABSTRACT FROM AUTHOR]

Objective: To explore the dose-effect relationship of water fluoride levels and renal damage in children and observe the difference of renal function between high-loaded fluoride people and dental fluorosis people in the same water fluoride level region., Methods: 210 children were divided into seven groups in term of drinking water fluoride levels and whether they suffered from dental fluorosis. Fluoride concentrations in urine and serum and activities of urine NAG and gamma-GT were determined., Results: The urine and serum fluoride of high-loaded fluoride people and dental fluorosis people increased compared with control, moreover fluoride contents in urine and serum increased gradually with the increase of fluoride level in drinking water. Urine NAG and gamma-GT activities significantly increased in dental fluorosis people from area of 2.58 mg/L fluoride in drinking water and in those two groups from area of 4.51 mg/L fluoride in drinking water. Moreover, there existed an obvious dose-effect relationship between the drinking water fluoride concentration and NAG and gamma-GT activity., Conclusion: Over 2.0 mg/L fluoride in drinking water can cause renal damage in children, and the damage degree increases with the drinking water fluoride content. Renal damage degree is not related to whether the children suffered from dental fluorosis and mainly due to water fluoride concentration.