金属酞菁化合物的拉曼光谱研究

本文对沉积在硅基片上的几种金属酞菁化合物薄膜进行了拉曼光谱测量 ,并对其主要振动谱带进行了初步指认 ,同时分析了不同金属原子对于酞菁分子拉曼振动谱的位置和强度所造成的影响     

Bulk electrolysis of Zn-phthalocyanine unveils self assembled nanospheres via anion binding

Stimuli responsive π-conjugated macrocyclic systems has shown significant attention in organic electronics, however, amongst them, porphyrins and phthalocyanines unveiled remarkable growth towards materials and biological applications. Herein, we report bulk electrolysis of Zn-phthalocyanine system (ZnPc-OMe) under potential difference of 1.5 V in chloroform results anion binding mechanism directs the formation of self-assembled nanospheres by diffusion controlled approach. Electrochemical and UV–Vis absorption studies of ZnPc-OMe suggest that anion (Cl⁻) binding ability towards ‘Zn‘ whilst applied potential leads to the formation of H⁺[(Cl)ZnPc-OMe]^- promote the enhanced current and charge generation. Microscopic analysis revealed that ZnPc-OMe and H⁺[(Cl)ZnPc-OMe]^- exhibit the nanosheets and spheres with an average diameter of 0.5–1 μm and 300–500 nm, respectively. Powder X-ray diffraction analysis and raman spectra revealed the changes in crystalline phase transitions via ion-dipole and π-π stacking interactions. Thus, these unique features are atypical for phthalocyanine derivative hitherto unknown.     

金属酞菁与咪唑类配体的轴向配位反应热力学

The thermodynamics of axial coordination reactions of Fe-phthalocyanine with various ligands of imidazoles in DMF solution has been studied. The axial coordination number(n)and equilibrium constants (βn) of the coordinating reaction were determined by spectral techniques. The steric and electrionic effects of the axial ligands were compared. The influence of temperature on the coordination reactions was discussed. The difference of axial coordinations of metallo-phthalocyanine and metallo-porphyrin with imidazoles was also analyzed.     

Synthesis and solution properties of new metal-free and metallo-phthalocyanines containing four bis(indol-3-yl)methane groups

Metallo-phthalocyanines bearing four bis(indol-3-yl)methane groups were successfully prepared by reaction of the corresponding phthalonitriles with anhydrous metal salts [Zn(CH₃COO)₂, NiCl₂ and CoCl₂] in the presence of a catalytic amount of DBU in 2-(dimethylamino)ethanol. The metal-free phthalocyanine was obtained by treating a mixture of the phthalonitrile derivative in similar conditions but in the absence of a metal salt. All of these phthalocyanines are soluble in DMSO, DMF, and pyridine. The products were characterized by IR, NMR, and UV-vis spectroscopy, MALDI-TOF-MS, and thermogravimetric analysis. The aggregation properties of the phthalocyanines were investigated at different concentrations in DMSO. All the phthalocyanines showed monomeric behavior in solution.