No abstract

Two new lanthanide-based coordination polymers, [Sm2(bzz)(ben)6(H2O)3]·0.5H2O (1) and [Eu(bbz)(ben)3] (2), were synthesized and characterized. The described products were formed from in situ-generated benzoate (ben) and N’-benzoylbenzohydrazide (bbz) ligands, which were the products of transformation of originally added benzhydrazide (bzz) under hydrothermal conditions. Compound 1 exhibits a one-dimensional (1D) double-chain structure built up from the connection of the central Sm3+ ions with a mixture of bzz and ben ligands. On the other hand, 2 features a 3D network with a 4-connected (66) dia topology constructed from dinuclear [Eu2(ben)6] secondary building units and bbz linkers. High-pressure CO2 sorption studies of activated 1 show that maximum uptake increases to exceptionally high values of 376.7 cm3 g−1 (42.5 wt%) under a pressure of 50 bar at 298 K with good recyclability. Meanwhile, 2 shows a typical red emission in the solid state at room temperature with the decay lifetime of 1.2 ms.

The title Schiff base compound, C25H20N2, crystallizes with two independent mol­ecules (A and B) in the asymmetric unit. In both mol­ecules, the imine group is approximately coplanar with the pyridine ring, with N—C—C—N torsion angles of 170.1 (3) and −172.0 (3) Å. In the crystal, A and B dimers are linked by pairs of C—H⋯π inter­actions and further C—H⋯π bonds link the dimers into a three-dimensional network.

Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.003 Å; disorder in main residue; R factor = 0.045; wR factor = 0.101; data-to-parameter ratio = 13.5.In the title compound, [Mn(NO 3 ) 2 (C 12 H 8 N 2 ) 2 ], the Mn II atom lies on a twofold rotation axis, and is six-coordinated in a distorted trans-N 4 O 2 octahedral environment by four N atoms from two 1,10-phenanthroline ligands and two O atoms from two nitrate anions. The nitrate anion is disordered about a twofold rotation axis with fixed occupancy factors of 0.5. In the crystal, molecules are linked by weak C-HÁ Á ÁO hydrogen bonds and -stacking interactions [centroid-centroid distance = 4.088 (5) Å ] into a three-dimensional supramolecular network. Related literatureFor the isotypic Cd compound, see: Shi et al. (2004). ExperimentalCrystal data [Mn(NO 3 Data collectionBruker SMART CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T min = 0.819, T max = 1.000 13250 measured reflections 2748 independent reflections 2367 reflections with I > 2(I) R int = 0.028

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.003 Å; R factor = 0.028; wR factor = 0.073; data-to-parameter ratio = 16.7.In the title inorganic-organic hybrid compound, [

The cyanide complex [N(CH3)4][Fe(2,2′-bipy)(CN)4]·3H2O (2,2′-bipy is 2,2′-bi­pyridine) was synthesized as a building block for the construction of a new two-dimensional cyanide-bridged Fe–Cd bimetallic coordination polymer, [Fe(2,2′-bipy)(CN4)Cd(en)2]·H2O, in which ethyl­enedi­amine (en) adopts both bridging and chelating coordination modes.

A novel nickel (Ni) and natural rubber loaded carbon nanofiber branches were prepared by electrospinning process followed by conventional heat treatment processes. This research utilized a one-step carbonization process using electrospun fibers from one-pot solution consisting of Ni, natural rubber cup lump (NR) and polyacrylonitrile (PAN). The as-spun nanofibers were successfully prepared for different types of NR-PAN and NiNR-PAN samples. The obtained nanofibers were stabilized at 260 °C for 2 h and then cooled to room temperature. The stabilized fibers were continued calcined at 900 °C for 1 h under N2 atmosphere. Samples were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), and Field Emission Scanning Electron Microscopy (FESEM). NR-PAN sample showed a uniform surface whereas tiny branches were found on NiNR-PAN sample. The carbon nanofiber branches with 48.29 nm diameter were observed on the parent carbon fiber surface with 700-800 nm diameter. Furthermore, only metallic Ni nanoparticles was formed and the average size of Ni nanoparticles calculated XRD result was 14.15 nm. SEM images showed that Ni nanoparticles were well dispersed on CNFs.