Phthalocyanine Tetrasulfonic Acid Tetrasodium Salt Research Articles

Synthesis of ordered mesoporous carbon containing highly dispersed copper–sulphur compounds in the carbon framework via a nanocasting route

We report a synthesis of ordered mesoporous carbon containing highly dispersed copper–sulphur particles in its carbon framework via the nanocasting route, involving the use of SBA-15 as the template and copper(II) phthalocyanine-tetrasulfonic acid tetrasodium salt (denoted as PcS) as the single precursor. It was found that below a pyrolysis temperature of 600 °C, PcS molecules are stable, allowing the formation of stable nanocast carbon. However, at higher pyrolysis temperature, PcS molecules decompose to carbon and copper–sulphur compounds in the carbon framework, or big copper particles, depending on the conditions. The obtained carbons show tunable specific surface areas in the range of 530–980 m 2/g and pore volumes in the range of 0.5–1.2 cm 3/g. Using phthalocyanine as carbon precursor, it is possible to directly prepare nanocast carbon containing highly dispersed metallic nanoparticles in its skeleton.

Thermal Lens Micro Optical Systems

This paper describes two types of miniaturized thermal lens optical systems that use optical fibers, SELFOC microlenses and light sources. The first system consists of a compact diode pumped solid-state laser (532 nm) as an excitation light source, a laser diode (635 nm) as a probe light source, an acoustoptic modulator as an excitation light modulator, fiber-based and conventional optics, and a detection system that combines a pinhole, an interference filter, and a photodiode. The second system consists of two laser diodes as the excitation (658 nm) and probe (780 nm) light sources, fiber-based optics, and the same detection system as the first one. The performance of the two systems was evaluated by the limit of detection (LOD) using standard solutions of sunset yellow (SY) and nickel(II) phthalocyaninetetrasulfonic acid tetrasodium salt (NiP). The LODs of the first system for SY and second system for NiP were calculated to be 3.7 x 10(-8) (1.7 x 10(-6) AU) and 7.7 x 10(-9) M (3.4 x10(-6) AU), respectively. These results were consistent with the expected values obtained from photothermal parameters.

Fabrication of a covalently attached multilayer film electrode containing cobalt phthalocyanine and its electrocatalytic oxidation of hydrazine

A covalently attached multilayer film containing cobalt phthalocyanine was fabricated on the surface of a glass carbon electrode by UV irradiation of ionic self-assembled multilayer films of a diazo-resin and cobalt phthalocyanine tetrasulfonic acid tetrasodium salt (CoTsPc). The multilayer films have been characterized by UV, IR spectra and cyclic voltammetry. The modified electrode had an excellent electrocatalytic response to the oxidation of hydrazine at a potential where oxidation of hydrazine is not observed at a bare glassy carbon electrode in alkaline aqueous solution. The modified electrode also exhibited several attractive features, such as simple preparation, fast response, good stability and repeatability, so it can be applied as an amperometric sensor of hydrazine.

A new method for surface staining large slices of fixed brain using a copper phthalocyanine dye

Here we describe a method for gross staining of gray matter in slices of formaldehyde-fixed human brain. After protection of white matter with 4% phenol at 60°C for 5 min followed by a cold water wash, the gray matter was stained for 10-15 min at 20-25°C with 1% aqueous copper(II) phthalocyanine tetrasulfonic acid tetrasodium salt (CPTS). The staining resisted all attempts to be washed from the gray matter. Stained slices can be stored indefinitely in slightly acidified water, or plastinated as permanent dry specimens.

This article is a serial study's: Dyestuff Aggregation Observed by Small-Angle X-ray Scattering. (Part 2). Interaction between the Dyestuff Aggregates in Aqueous Solution.

The small-angle X-ray scattering from dyestuff in aqueous solution reveals a peak around 0.1 A-1 caused by the electrostatic interaction between the aggregated particles. By assuming that the scattering profile is composed of the product of the particle scattering from an isolated particle and the interference, the interaction between aggregated particles was evaluated in terms of the hybrid of a Gaussian-type and stretched exponential function, The two dyestuffs chosen to demonstrate the present method, were the reactive dye C.I. Reactive Blue 19 (RB19) and the acid dye copper phthalocyanine tetra-sulfonic acid tetra-sodium salt (CuPc); these dyes have the dimensions of a flat molecule and a symmetrical disk, respectively.