سامانه پژوهشی دانشگاه کردستان | Sandwich-type polyoxometalates of the later lanthanide ions. Syntheses and structures of [(AXW9O34) 2(H2OM)3CO3]11- (X = P5+, As5+) (M = Tb3+, Dy3+, Er3+)

عنوان	Sandwich-type polyoxometalates of the later lanthanide ions. Syntheses and structures of [(AXW9O34) 2(H2OM)3CO3]11- (X = P5+, As5+) (M = Tb3+, Dy3+, Er3+)
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Polyoxometalate; Sandwich-type complex; Later lanthanide ions; Tridentate carbonate ligand; Single crystal structure analysis
چکیده	Six new complexes were synthesized in a 0.1M aqueous carbonate solution and characterized by elemental analyses, thermogravimetric analyses, infrared spectroscopy and X-ray single crystal structure analyses. The single-crystal structure analysis was on K11[(A-AsW9O34)2(H2ODy)3- CO3]·22H2O. The results revealed that the complexes are isomorphic and their structures consist of two lacunary [A-XW9O34]9 Keggin moieties linked by a (OMOH2)3C belt, forming an A-type sandwich structure. The CO2þ 3 is tridentate and fixes three M3+ centers together by its oxygens. Each M3+ cation is mono-capped trigonal-prismatic coordination, achieved by two terminal oxygens of an edge-shared pair of WO6 octahedra to each [A-XW9O34]9 and two oxygens from the belt, and the cap by one water.
پژوهشگران	احمد امینی پور (نفر پنجم)، الهام ناصری (نفر چهارم)، هادی امیری رودباری (نفر سوم)، فرانچسکو نیکولو (نفر دوم)، روشن خوشنوازی (نفر اول)

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