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Two new copper(II) complexes, {[Cu(bipmo)(npa)]}n(1) and {[Cu(bipmo)(pa)]}n(2) (bipmo=bis(4-(1H-imidazol-1-yl)phenyl)methanone), were synthesized by solvothermal methods and structurally characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. The results from single-crystal X-ray diffraction data indicate that the solid state structures of 1and 2consist of neutral metal aromatic carboxylate layers, which are pillared by the weak interactions to generate 3D architectures. The topological structures of 1and 2are uninodal nets based on 4-connected nodes with the Schläfli symbol of (65·8).

Two Mn(II) complexes, {[Mn(BIPMO)2Cl2] · 2(H2O)}n(1) and {[Mn(BIPMO)2(SCN)2] · 2(CH3OH)}n(2) (BIPMO = bis(4-(1H-imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1and 2are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl−for 1, and SCN−for 2) to form a distorted octahedral geometry.

This paper mainly introduces the energy-saving control strategy for coal-fired boiler heating system. The controlled objects of coal-fired boiler heating system includes the blowers of the boiler, the induced draft fan of the boiler, the chain for coal-carrying, the primary side water circulation and the secondary side water circulation. All the controlled objects are droved by electrical motors. By the optimal frequency conversion technical, more energy and coal can be saved.