Dimerization of cobalt(II) tetrasulfonated phthalocyanine in water and aqueous alcoholic solutions

Yang, Yu-Chu; Ward, Joseph P.; Seiders, Reginald P.

doi:10.1021/ic00206a011

Cited by 175 publications

(113 citation statements)

References 3 publications

(3 reference statements)

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“…The values of K D measured for these cobalt neopentoxy complexes in DCB are 2-3 orders of magnitude smaller than for CoTsPc in aqueous solution (1)(2)(3)(4)7). This is consistent with the 3-4 order of magnitude difference between K D of CuPcX4 in benzene (13,14) and CuTsPc in water (3,4,6).…”

Section: Resultssupporting

confidence: 73%

“…Extensive studies on the water-soluble tetrasulphonated phthalocyanines (TsPc) (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) have shown a tendency for these complexes to dimerise in aqueous solution, the extent of dimerisation depending strongly upon the nature of the central substituent in the phthalocyanine ring. Typically, the dimer has a Q band absorption at ca.…”

Section: Introductionmentioning

confidence: 99%

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Dimerisation of mononuclear and binuclear cobalt phthalocyanines

Nevin¹,

Liu²,

Lever³

1987

Can. J. Chem.

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Section: Resultssupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Dimerisation of mononuclear and binuclear cobalt phthalocyanines

Nevin¹,

Liu²,

Lever³

1987

Can. J. Chem.

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“…The immobilization of these compounds can lead to modified electrodes with improved kinetic properties. The major characteristics of phthalocyanines are their high thermal and chemical stability, coupled with their extensive redox chemistry and their tendency to form aggregates [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

Peeters

Wael

Bogaert

et al. 2008

Sensors and Actuators B: Chemical

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Because of their toxicity to humans and their tendency to bioaccumulate in the food chain, the detection of chlorophenols has been investigated intensively. This paper compares the oxidation of 4-chlorophenol on a bare gold electrode to its detection on gold electrodes electrochemically modified with either cobalt(II) tetrasulphonated phthalocyanine (CoTSPc) or 3,4 ,4 ,4 -copper(II) tetrasulphonated phthalocyanine (CuTSPc). Results show that the electrochemical behaviour of 4-chlorophenol depends on the molecular structure of the phthalocyanine thin film layers on the gold surface. In addition, the influence of the coordinating properties of the phthalocyanines on the sensitivity of the measurement and the fouling of the electrode material is discussed.

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“…The formation of aggregates larger than dimers has been observed [2,12,31,32,36,37,39], but data have not often been treated quantitatively. We previously analyzed spectrophotometric data with multiple-aggregation models to estimate the average degree of aggregation and association constants (K) for Co II Pc and Fe II Pc in dimethylsulfoxide [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Surfactant-based Microheterogeneous Fluids on Aggregation of Copper Phthalocyanine Tetrasulfonate

Zelina

Njue

Rusling

et al. 1999

J. Porphyrins Phthalocyanines

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Electronic absorption spectroscopy was used to measure the molecular association of copper phthalocyanine tetrasulfonate in micellar solutions, a microemulsion made with cationic surfactant, and homogeneous solvents. Analysis of absorbance versus concentration data using a multiple-aggregation model and non-linear regression analysis gave values of association constants, molar absorptivities and estimates of average aggregation number. Microemulsions and aqueous micellar solutions made with alkylammonium surfactants inhibited aggregation, probably because of interactions between the phthalocyanine sulfonate groups and the cationic surfactant head groups at interfacial surfaces. Similar aggregation behavior was observed previously in multiple-bilayer films of cationic surfactants. Water and aqueous solutions containing tetraethylammonium bromide or anionic SDS micelles provide environments facilitating extensive aggregation of Cu II PcTS 4−. The major species are dimers in water and acetonitrile/water, but the formation of higher aggregates is promoted by addition of SDS or TEAB. Aprotic organic solvents provide environments intermediate between these two extremes, giving relatively large aggregation numbers (i.e. five to seven) but smaller association constants than aqueous media not containing cationic surfactants.

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Dimerization of cobalt(II) tetrasulfonated phthalocyanine in water and aqueous alcoholic solutions

Cited by 175 publications

References 3 publications

Dimerisation of mononuclear and binuclear cobalt phthalocyanines

Dimerisation of mononuclear and binuclear cobalt phthalocyanines

The electrochemical detection of 4-chlorophenol at gold electrodes modified with different phthalocyanines

Influence of Surfactant-based Microheterogeneous Fluids on Aggregation of Copper Phthalocyanine Tetrasulfonate

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