Triethyl­ammonium (indane-1,2,3-trione 1,2-dioximato-κ2 N 1,O 2)(indane-1,2,3-trione 2-oximato 1-oxime-κ2 N 1,O 2)nickel(II)

In the title compound, (C6H16N)[Ni(C9H4N2O3)(C9H5N2O3)], the NiIIion is four-coordinated by two N atoms and two O atoms from two indane-1,2,3-trione-1,2-dioxime ligands. The two organic ligands are linked by an intra­molecular O—H⋯O hydrogen bond. In the crystal, mol­ecules are linked by N—H⋯O hydrogen-bonds

Shape-stable and smart polyrotaxane-based phase change materials with enhanced flexibility and fire-safety.

post-print2142 K

Sodium alginate and Chitosan aided design of form-stable Polyrotaxane based phase change materials with ultra-high latent heat.

We prepared a series of highly porous Polyrotaxane/sodium alginate, and Polyrotaxane/Chitosan foam alloys according to a sustainable pathway by using water as the only solvent. The foam alloys were further used as supporter materials for poly (ethylene glycol) (PEG) encapsulation, to fabricate shape-stable bio-based phase change materials (PCMs). The pore morphology and the internal interface between PEG and foam alloys were characterized by scanning electron microscope (SEM). Due to the good compatibility between foam alloys and PEG, the PCM performed perfect anti-leakage properties. The introduction of sodium alginate or Chitosan ensures the shape stability of the PCMs during the phase transition. The PCMs performed good cycle stability and showed ultra-high latent heat (171.6 J g−1–189.5 J g−1). Finally, we compared the typical indicators of this work with those reported in the literature, and the comparison highlighted that the present PCMs have the significant advantages: high melting enthalpy, convenient preparation and outstanding sustainability. Notably, the work provided a sustainable idea for the design of anti-leakage and shape-stable PEG-based PCMs.pre-print1327 K

Aqua[1-(pyridin-2-yl)ethanone oximato][1-(2-pyridin-2-yl)ethanone oxime]copper(II) perchlorate monohydrate

In the title compound, [Cu(C7H7N2O)(C7H8N2O)(H2O)]ClO4·H2O, the CuII ion is five-coordinated by the N atoms from the 1-(pyridin-2-yl)ethanone oximate and 1-(pyridin-2-yl)ethanone oxime ligands and by the water O atom in a distorted square-pyramidal geometry. The two organic ligands are linked by an intramolecular O—H...O hydrogen bond. In the crystal, molecules and ions are linked by O—H...O hydrogen-bonding interactions, forming chains along the a axis. The perchlorate O atoms are disordered in a 0.58 (2):0.42 (2) ratio

Surface engineering for cellulose as a boosted Layer-by-Layer assembly: Excellent flame retardancy and improved durability with introduction of bio-based “molecular glue”.

Layer-by-Layer (LbL) assembly was attractive as a versatile tool to address the flammability of cotton, while the washing fastness of LbL coating stayed an issue. Aiming to tackle this issue, LbL layers consisted of phenylphosphonic acid (PHA) and 3-aminopropyltriethoxysilane (APTES) was deposited on polydopamine (PDA)-coated cotton. The prepared cotton reached 31.4% of limiting oxygen index (LOI), and extinguished immediately after removing the ignitor. Peak of heat release rate (pHRR) attenuated around 36 % compared with pure cotton. A combined barrier and quenching mechanisms were proposed. Moreover, enhanced washing durability (24.1% of LOI) was achieved even after 50 detergent laundering cycles. A facile, boosted LbL approach with proposed π − π stacking interactions between PDA abundant aromatic structures and benzene ring in PHA from LbL layers, is first to put forward to construct durable efficient flame retardant (FR) cotton. This work attempted to enlighten more thoughts and design for durable FR cotton fabrics.pre-print2453 K

Experimental Study on Mechanical Properties of Root–Soil Composite Reinforced by MICP

Mechanical properties of undisturbed root–soil composites were investigated through direct shear tests under different cementation concentrations by microbially induced carbonate precipitation (MICP). The results show that MICP has a significant strengthening effect on the undisturbed root–soil composite, and the maximum shear strength increases by about 160% after grouting. The shear strength of root–soil composites increases with the increase in calcium chloride concentration, and the shear strength increases the most when the concentration is 0.75M. Calcium carbonate formed by MICP treatment has cementitious properties, which increases the cohesion and internal friction angle of the root–soil composite by about 400% and 120%, respectively. The results show that it is feasible to solidify slope and control soil erosion together with microbial and vegetation roots. The research results can serve as a scientific basis and reference for the application of MICP technology in vegetation slope protection engineering

One-dimensional chain crown ether complexes: Synthesis and crystal structure of [Na(18-crown-6)]₂[M(mnt)₂](M = Zn, Cd)

327-330The reactions of IR-crown-6 with Na2[Zn(mnt)2] and Na2[Cd(mnt)2] have been studied and the complexes [Na(18-crown-6)]2[M(mnt)2](M = Zn, Cd), are characterized by elemental analysis, IR spectrum and X-ray diffraction analysis. 1 and 2 belong to monoclinic, space group c2/c with cell dimensions, 1: a = 2.2418(6), b = 1.1359(3), c = 1.9887(6) nm, β= 120.391 (4)o, V = 4.368(2), nm3, Z = 4, Dcalcd = 1.399 Mg/m3, F(000) = 1920, R1 = 0.0302, wR2 = 0.0560 and 2: a = 2.2547(6), b = 1.1412(3), c = 1.9938(6) nm, β=119.715(4)°, V = 4.455 nm3, Z = 4, Dcalcd = 1.442 Mg/m3 , F(000)= 1992, R1 = 0.0384, wR2 = 0.0575. Two complexes display a one-dimensional chain of [Na(18C6)]+(complex cations and [M(mnt)2]2- (M = Zn, Cd) complex anion bridged by Na-O interactions between adjacent  [Na(18C6)]+ units respectively

Reduction of CO\u3csub\u3e2\u3c/sub\u3e with H\u3csub\u3e2\u3c/sub\u3eS in a simulated deep-sea hydrothermal vent system

H2S is considered to be an important reductant in abiotic CO2 reduction to organics, however, almost no experimental support has been reported. Herein, the first observation of CO2 reduction to formate with H2S under alkaline hydrothermal conditions is reported, and water is found to act as a hydrogen donor