Search

An interesting phenomenon was that some symmetrically substituted metal phthalocyanines behaved characteristic absorption band split in non-coordinated solvents especially when they had zinc as the center metal and alkyloxy substituted groups at non-periphery of molecular skeleton, for example tetra- α -octyloxy zinc phthalocyanine having split peaks at 706 and 752 nm in chloroform, respectively. The red split peak at 752 nm could be strengthened by acid enhancing macromolecular conjugation, and contrarily weakened by alkali. Further a linear relationship was found between the relatively alteration value of characteristic absorbance and the concentration logarithm of acid in chloroform from 1.18 × 10 −5 to 1.39 × 10 −1 mol/L, which implied its potential application in analysis on trace of total acids included in grain, food and medicine, etc.

In order to include phthalocyanine macromolecule in MCM-41 molecular sieve, a inclusion-suitable phthalocyanine derivative tetra-β-(2-(diethylamino)ethoxy) nickel phthalocyanine was synthesized, in two steps, from 4-nitrophthalonitrile and 2-(diethylamino)ethanol, and characterized by mass spectra, 1H nuclear magnetic resonance spectroscopy, ultraviolet visible spectroscopy, infrared spectroscopy and elemental analysis, which confirmed the proposed molecular structure. The inclusion of synthesized phthalocyanine compound in MCM-41 was carried out by the in situ synthesis method using cetyltrimethyl ammonium bromide as structure template and tetraethyl orthosilicate as silica source in presence of this phthalocyanine compound. The inclusion material was studied by means of X-ray diffraction, field emission scanning electron microscopy, high-resolution transmission electron microscopy, nitrogen adsorption isotherm measurements, etc. Results showed that the macromolecular compound was successfully included into MCM-41, the obtained inclusion material displayed mainly prisms and globes, and the material was a kind of mesoporous materials with regularly hexagonal honeycomb array of uniform cylindrical pores and high surface area.

The optically active tetra-β-[(S)-2-octanyloxy]-substituted copper and nickel phthalocyanines were synthesized via a two-step route with 4-nitro-phthalonitrile and (S)-2-octanol as the starting materials. Both compounds are fully characterized by MS, 1H NMR, UV-Vis, IR, CD and elemental analysis, and soluble in common organic solvents except methanol. The results showed that they were dispersed into single molecules in chloroform and dichloromethane, but prone to congregate into H-type aggregates in ethanol and diethyl ether. They assembled to H-type aggregates with left-handed helix when deposited as thin films.

Teraaminometallophthylocyanines (TAMPcs) 3a 1 – 3a 4 and 3b 1 – 3b 4 were prepared, in two steps, from 3-nitro-phthalic anhydride and 4-nitro- o -phenyleneimine, respectively. Although simple methods were employed without using chromatographic fractionation, purer products with higher yields were obtained. Synthesized compounds were characterized by MS, 1 H NMR, UV–VIS and IR. Characterization results showed that 3a 1 – 3a 4 contained intramolecular hydrogen bonds, while 3b 1 – 3b 4 did not contain intramolecular hydrogen bonds. Property comparisons between 3a 1 – 3a 4 and 3b 1 – 3b 4 are presented in this paper.

Electrochemistry and electrocatalysis of binuclear cobalt phthalocyaninehexasulfonate sodium salt (bi-CoPc) were investigated successfully in liquid crystal films of didodecyldimethylammonium bromide (DDAB) on pyrolytic graphite (PG) electrodes in aqueous solution. This new bi-CoPc-surfactant film modified electrode could reduce aggregation of bi-CoPc in aqueous solution, which was confirmed by the electronic absorption spectra in the visible region and images of transmission electron microscopy (TEM). The charge transport diffusion coefficient (D(ct)) and apparent heterogeneous electrode reaction rate constant (k(s)) for this modified electrode were estimated. The reduction of bi-CoPc ligand showed excellent electrocatalytic ability for the reduction of trichloroacetic acid (TCA) and catalytic current had a linear relationship with the concentration of TCA in the range of 3x10(-5)-7.5x10(-3) M. The reduction of bi-Co(III)Pc/bi-Co(II)Pc couple exhibited new pattern of catalytic reactivity in the reduction of oxygen. Peak current for the cathodic reduction of oxygen is proportion to the square root of the scan rate in the range of 5-1000 mV s(-1) in oxygen-saturated solution.

A water-soluble binuclear cobalt phthalocyanine-sulphonate was used to prepare LB films by semi-amphiphilic technique. Atomic force microscopy (AFM) was applied to investigate the surface morphology of C18NH2-OME/bi-CoPc LB multilayer on silicon substrate and surface photovoltage spectra (SPS) was used to study the interfacial charge transfer properties.

( Z)-1-(Triphenylstannyl)-3- p-chlorophenyl-1-butene-3-ol was synthesised and its structure was determined by X-ray diffraction analysis.