Using the anionic precursor [(Tp)Fe(CN)3]-, a new one-dimensional Ising cyanide-bridged chain, [(Tp)2FeIII2(CN)6Cu(CH3OH).2CH3OH]n, has been prepared. The crystal structure and magnetic studies demonstrate that it is a single-chain magnet and the blocking temperature is ca. 6 K.

With the anionic precursor [(Tp)FeIII(CN)3]− [1; Tp: hydrotris(pyrazolyl)borate] as a building block, two trinuclear complexes, [(Tp)2FeIII2(CN)6Mn(CH3OH)4]·2CH3OH (2), [(Tp)2FeIII2(CN)6Ni(cyclam)]·2H2O (3; cyclam: 1,4,8,11‐tetraazacyclotetradecane) and a one‐dimensional polymer, [(Tp)FeIII(CN)3Cu(dien)]ClO4·H2O (4; dien: diethylenetriamine), have been synthesized and structurally characterized. In complex 2, each of the two [(Tp)Fe(CN)3]− units binds through one of its three cyanide groups to a central [Mn(CH3OH)4]2+ core. In complex 4, a zigzag chain is formed by combining [TpFe(CN)3]− and [Cu(dien)]2+ fragments alternately through cyano bridges. The magnetic properties of complexes 2−4 have been investigated in the temperature range 2−300 K. A weak antiferromagnetic interaction between the MnII and FeIII ions has been found in complex 2. The magnetic data of 2 can be fitted with the isotropic Hamiltonian Ĥ = −2J(Ŝ1·Ŝ2 + Ŝ2·Ŝ3) − 2J′Ŝ1·Ŝ3, where J and J′ are the intramolecular exchange coupling parameters between adjacent and peripheral spin carriers, respectively. This leads to values of J = −2.19 cm−1 and g = 2.13. The same fitting method was applied to complex 3 to give values of J = 17.2 cm−1 and g = 2.37, showing that there is a ferromagnetic interaction between the FeIII and NiII ions. The 1‐D chain of 4 is treated as alternating uniform Fe−Cu dimers with different intradimeric (Jd) and interdimeric (Jc) exchange constants, leading to Jd = 10.9 cm−1, Jc = 1.29 cm−1 and g = 2.54. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

The solubilities of 11α-hydroxy-16α,17α-epoxyprogesterone in methanol, ethanol, acetone, ethyl acetate, and acetic acid were measured using an isothermal method from 283 K to 323 K. A laser monitoring observation technique was used to determine the dissolution of the solid phase in a solid + liquid mixture. The solubility of 11α-hydroxy-16α,17α-epoxyprogesterone in the above solvents increased in the order ethanol < methanol < ethyl acetate < acetone < acetic acid. The experimental solubility data was correlated with a semiempirical equation.

A new strategy to retrieve chitosan-decorated carbon nanotube (CS/CNT) from aqueous dispersion was proposed. The CS/ CNT, prepared via a "surface deposition−crosslinking" method, exhibited an aggregation microstructure with plentiful interstitial spaces. By introducing magnetic nanoparticle (MNP) into CS/CNT dispersion solution, MNP was embedded in the CS/CNT aggregates, which endowed the CS/CNT with magnetic retrievability. Using this strategy, a simple and convenient operation for the removal of anionic azo dye (acid red 18 (AR18)) was achieved by directly adding CS/CNT and MNP into the dye solution, where CS/CNT acted as an adsorbent and MNP enabled all CS/CNT aggregates to be magnetically retrievable. Effects of pH, ionic strength, contact time, temperature, and initial AR18 concentration on adsorption efficiency were investigated. Results showed that AR18 adsorption could achieve equilibrium quickly and the maximum adsorption capacity could be up to 809.9 mg•g −1 at 323.15 K. Full kinetic and thermodynamic investigations as well as isotherm analysis were also undertaken. Moreover, the reusability of magnetically retrievable CS/CNT was evaluated, and the result showed that the removal of AR18 was kept relatively constant (99.11 % to 99.76 %) in 10 consecutive cycles. The study suggests that the magnetically retrievable CS/CNT is a promising adsorbent for removal of anionic azo dyes from aqueous solution.