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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Palladium complex,Phosphine-ylide,Ullmann homocoupling reaction,Aryl halides
- چکیده:
- چکیده انگلیسی: A highly efficient Ullmann homocoupling reaction of aryl halides using palladium (II) phosphine-ylide complexes as homogenous pre-catalysts under aerobic conditions has been developed without the need for any chemical co‐reducing agents. The procedure is relatively mild and appears to have broad applicability, being useful for the homocoupling of both electron-deficient and electron-rich aryl halides and also homocoupling of phenylboronic acid and phenylacetylene.
- انتشار مقاله: 12-03-1399
- نویسندگان: Roya Azadi,Sepideh Samiee,Ziba Rafiee
- مشاهده
- جایگاه : پژوهشی
- مجله: Quarterly Journal of Applied Chemical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Artificial Neural Networks,Simultaneous kinetic determination,Hg2+ ion,Pd2+ ion,Nitro benzoyl diphenylmethylen phosphorane
- چکیده:
- چکیده انگلیسی: A new selective reagent was used for simultaneous determination of mercury and palladium in real samples with their different kinetic spectrophotometric properties. The method is based on the difference in the rate of the oxidation reaction of the recently synthesized reagent, nitro benzoyl diphenylmethylen phosphorane (N-BDMP), with Hg2+ and Pd2+. The kinetic profiles were monitored and recorded at maximum wavelength of reagent, and the data obtained from the experiments were processed by a chemometric approach (principal component analysis-artificial neural network models (PCFFNNs)). Performances of the proposed method were tested with regard to relative standard error (RSE), using synthetic solutions. Under the working conditions, the proposed method was successfully applied to the simultaneous determination of Hg2+ and Pd2+ in water, waste water and urine samples. The results showed that mercury and palladium could be determined simultaneously in the range of 4.00×10-7 to 1.00×10-4 mol L-1(0.08 to 20.06 μg mL-1) and 1.00×10-6 to 1.00×10-4 mol L-1 (0.11 to 10.64μg mL-1), respectively. Investigation of the effect of other metals on the system shows that this reagent is very selective for these two analytes and other metal ions do not show any interference.
- انتشار مقاله: 25-08-1394
- نویسندگان: Tayyebeh Madrakian,Abbas Afkhami,Masoumeh Mohammadnejad,Sayyed Javad Sabounchei,Sepideh Samiee
- مشاهده
- جایگاه : پژوهشی
- مجله: Inorganic Chemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Palladium complex,Phosphine-ylide,Ullmann homocoupling reaction,Aryl halides
- چکیده:
- چکیده انگلیسی: A highly efficient Ullmann homocoupling reaction of aryl halides using palladium (II) phosphine-ylide complexes as homogenous pre-catalysts under aerobic conditions has been developed without the need for any chemical co‐reducing agents. The procedure is relatively mild and appears to have broad applicability, being useful for the homocoupling of both electron-deficient and electron-rich aryl halides and also homocoupling of phenylboronic acid and phenylacetylene.
- انتشار مقاله: 12-03-1399
- نویسندگان: Roya Azadi,Sepideh Samiee,Ziba Rafiee
- مشاهده