Synthesis,Structural Characterization and Catalytic Activity of Copper(Ⅰ)Complexes with Triphenylphosphine and Pyridine Derivatives

Two new Cu（Ⅰ） complexes [CuCl（3-PyOH）（PPh_3）_2]（1） and [Cu_2（μ-Cl）_2（4-Stpy）（Ph_3P）_3]（2）（PyOH = hydroxypyridine; stpy = styrylpyridine） with triphenylphosphine and pyridine derivatives have been synthesized and characterized by elemental analysis and X-ray single-crystal diffraction. Compound 1 crystallizes in monoclinic, space group P2_1/c with a = 9.8945（7）, b = 37.266（2）, c = 10.9461（7） A, β = 116.0750（10）°, V = 3625.3（4） A^3, Z = 4, D_c = 1.350 Mg/cm^（-3）, μ = 0.801 mm^（-1）, F（000） = 1528, the final R = 0.0320 and w R = 0.0729 for 18568 observed reflections（I 〉 2σ（I））, R（all data） = 0.0413, wR（all data） = 0.0769, completeness to theta of 25.01 is 99.9% and GOF = 1.037. Compound 2 crystallizes in monoclinic, space group P2_1/c with a = 11.290（3）, b = 20.388（5）, c = 24.092（6） A, β = 102.028（4）°, V = 5424（2） A^3, Z = 4, D_c = 1.428 Mg/cm^（-3）, μ = 1.016 mm^（-1）, F（000） = 2408, the final R = 0.0568 and w R = 0.1486 for 27644 observed reflections（I 〉 2σ（I））, R（all data） = 0.0716, wR（all data） = 0.1592, completeness to theta of 25.01 is 99.9% and GOF = 1.056. Two new Cu（I） complexes have been utilized as catalysts for N-arylation of imidazole and both showed good catalytic activity.

Synthesis and Characterization of Polyamide-Containing 2, 6-(Substituded) pyridine Derivatives

A new series of acyelic aromatic polyamide pyridine derivatives a-h and a new macrocyclic polyamide containing pyridine ring i were synthesized by the reaction of N^2, N^6-his（2-aminoethyl） pyridine-2, 6-dicarboxamide or N^2 , N^6-bis （3-aminopropyl） pyridine-2,6-dicarboxamide with various acyl chloride. The compounds were characterized by MS, ^1H NMR, IR and elemental analysis. The single-crystal structure of g confirmed that the crystal is of triclinic, space group P-1 with Mr = 487.55, α=9.3031（19）, b=12.167（2） , c=126.50（3） nm, α=108.91（3）°, β= 97. 57（3）°, γ=102.07（3）°, Ⅴ= 1 293.5 nm, Z=2, Dc=1. 252 kg/m^3, μ=0. 086 mm^-1, F（000）=516, X-ray analysis reveals that there exist hydrogen bonding and network structure in the crystal.

Stability of Rare Earth Ion-N,N′-bis(2′-Pyridine)methyl-1,10-Phenanthroline-2,9-Dimethanmine Binary Complexes

The stability constants of binary complexes Ln-L (Ln = La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+ Tb3+, Dy3+, Ho3+, L = N, N'-bis (2'-pyridine) methyl-1, 10-phenanthroline-2, 9-dimethanamine) were determined by pH potentiometric titration method at 25 +/- 0.1degreesC in 0.1 mol . L-1 NaClO4. The probable structures of the corresponding complexes were proposed. The influence of the metal ions to the stability of binary complexes and the stability difference between the complexes of rare earth ion and the corresponding complexes of Co2+, Ni2+, Cu2+ ions were discussed. The stability constants of the corresponding binary complex of radioactive Pm3+ ion were estimated by linear regression.

Luminescence properties of the co-luminescence groups of Sm-La-pyridyl carboxylic acids

A novel ligand, N,N＇-（2,6-pyridinedicarbonyl）bis[N-（carboxymethyl）] （Lj） was designed and synthesized starting from pyri- dine-2,6-dicarboxylic acid （I）. The ligand （L0 and ititermediate product （3） were characterized by 1H nuclear magnetic resonance （NMR）, Fourier transform infrared spectrometer （FT-IR） spectra and elemental analysis. Besides, four novel co-luminescence systems of Sm-La-pyridyl carboxylic acids： K4Sm（1-x）Lax（L1）C13T1H20, K12Sm2（1-x）La2x（L2）3 C16y2H2O, K6Sm20 xyLa2x（L3）C16-y3H：O and K4Sm（1-x）Lax（L4）Cl3y4H20 （x was the mole fraction of La（III） in the mixed ions, the value was 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, respectively; Yl, Y2, Y3, Y4 were plus integer） were studied, and the mechanism of fluorescence enhancement effect was discussed detailedly.