A newΛtype pyriding iodide was synthesize d by reaction of 4-picoline and methyl diiodide.The structure was characterized by elemental analysis,IR,UV and TG.The crystal structur e of the title compound was determined by X-ray single crystal diffraction.T he crystal belongs to monoclinic wit h space group C2/c,a=18.812(4)*!,b=8.7816(6)*!,c=10.3165(12)*!,β=93.71(1),V=1700.7(4)*! 3 ,Z =4.In the molecule,two 4-picolin e molecules are bonded by -CH 2 group to formΛtype pyridine salt.CCDC:180871.
A new ligand, 10ethylphenothiazinyl 3 yl methylene thiosemicarbazon (HL) and its complexes ML2 (M=Zn2+, Cd2+), which exhibit intensive two-photon excited (TPE) fluorescence at 800 nm laser pulses in femtosecond regime, were synthesized and characterized. The measured power dependence of the fluorescence signals provided direct evidence for TPE. All of them exhibited a large two-photon absorptive cross section and, more importantly from the application point of view, high photochemical/photothermal stability.
Two new ligands, S-benzyl-b-N-[10-ethylphenothiazine-3-methylene] dithiocarbazate (HL1), S-methyl-b-N-[10-ethylphenothiazine-3-methylene] dithiocarbazate (HL2), and their complexes 122222(ZnL, ZnL, CdL), which exhibit intensive two-photon excited (TPE) fluorescence at 800 nm laser pulses in the femtosecond regime, are synthesized and fully characterized. The measured power dependence of the fluorescence signals provides a direct evidence for TPE. All of them exhibit a large two-photon absorptive crosssection. The two-photon-excited fluorescence spectra of them are compared and contrasted with the corresponding results obtained from the one-photon excitation. Emission peaks of the ligands and their complexes are observed mostly at the region 550—595 nm in the TPE fluorescence spectra.
Co(NO3)2, N carbazolyacetic acid and 4,4′ bipyridyl can give rise to a novel coordination polymer [Co2(Cabo)2(NO3)2(4,4′ bipy)2]n using a fritted U tube. Single crystal X ray diffraction displays in the complex, each Co? is six coordinated by two N atoms from different 4,4′ bipyridyl ligands, two O atoms of the bridge from two N carbazolyacetic acid and two O atoms of one nitrate anion to form a distorted octahedral. Two O atoms of the carboxyl group act as bridge to link two Co? atoms. The resulting structure is a ladder polymer. CCDC: 211713.
The nickel(Ⅱ) complex with the new ligand of S-benzyl-b-N-[10-ethyl- phenothiazine-3-methylene]dithiocarbazate(HL) crystallizes in the triclinic system, space group P?with a = 7.516(1), b = 11.322(1), c = 13.366(1) , a = 84.818(1), b = 81.688(1), g = 76.037(1), V = 1090.26(3) 3, Z = 1, Dc = 1.413 g/cm3, F(000) = 482, m(MoKa) = 0.774 mm-1 (l = 0.7103 ?, R = 0.0573 and wR = 0.1375 for 3357 observed reflections with I ≥ 2s(I). The HL has lost a proton from its tautomeric thiol form and acts as a single negatively charged bidentate ligand coordinating to the nickel ion via the mercapto sulfur and b-nitrogen atoms. The geometry around Ni(Ⅱ) is almost square-planar with two equivalent NiN and NiS bonds. The nonlinear absorption of HL and NiL2 solutions (in DMF) was measured by open-aperture Z-scan technique at the wavelength of 532 nm.
