Stability constants of copper (II)-calcein blue complexes
نویسندگان
چکیده
منابع مشابه
SPECTROPHOTOMETRIC STUDY OF THE STOICHIOMETRY AND CONDITIONAL STABILITY CONSTANTS OF SOME TRIVALENT METAL ION COMPLEXES OF METHYLTHYMOL BLUE
Complexation reactions between methylthymol blue and Fe , A l ,Ga , 1n a nd TI ions have been studied in buffer aqueous solutions of pH 5.0 at 2S°C by a spectrophotometric technique. The conditional stepwise stability constants of the resulting 1:l and 1:2 (metal-to-ligand) complexes were determined from the absorbance-mole ratio data at three different wavelengths of the visible sp...
متن کاملStability Constants of Cobalt(II) and Copper(II) Complexes with 3-[(o-Carboxy-p-nitrobenzene)azo]chromotropic Acid and Selective Determination of Copper(II) by Competition Coordination
A method for selective determination of copper(II) based on the reactions of copper(II) or cobalt(II) with 3(o-carboxy-p-nitrobenzene)azo chromotropic acid (CNBAC) at pH = 11.4 was developed. Results have shown that two complexes, Co(CNBAC)2 and Cu(CNBAC), were formed, whose cumulative stability constants were 5.22 10 and 7.61 10 dm mol, respectively, and their molar absorption coefficients wer...
متن کاملStability Constants Determination of Mandelate Complexes of Coba1t(II), Nickel(II) and Zinc(II)
Determination of the composition and stability of metal-ion mandelate complexes was performed as a part of systematic investigations of unsubstituted and substituted metal-ion monocarboxylate complexes in our laboratory. The intention was to give some insight into factors governing the stability of these complexes-. In order to complete this study the same experimental conditions (i. e. tempera...
متن کاملSynthesis of Binuclear Copper (II) Complexes with Expanded Porphyrins
The synthesis and characterization of some new binuclear copper (II) complexes, based on the use of large, pyrole-containing macrocycles, the so called "expanded porphyrins", [Cu2(macrocycle)]+4 is described. Electron Spin Resonance (ESR) studies indicate a weak "half-field line", which is characteristic of the Cu(II)-Cu(II) dimer, is observed at about 1600G. The obser...
متن کاملSpectrophotometric Study of Stability Constants of Metal Complexes of Promethazine at Different Temperatures
The complexation reactions between Cu2+, Pd2+ and Ni2+ metal ions with promethazine (PM) in water or DMF were studied by the spectrophotometric methods at [(15, 25,35 and 45±0.1) °C]. The complexation process was optimized in terms of pH, temperature and contact time. The stoichiometry of the complex was found to be 1:1 (metal ion/ligand). The formation constants of the resulting complexes were...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BUNSEKI KAGAKU
سال: 1980
ISSN: 0525-1931
DOI: 10.2116/bunsekikagaku.29.11