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Volumn 13, Issue 5, 2010, Pages 609-612

New estertin derivatives based on trivacant Keggin-type [β-SbW9O33]9- cluster

Author keywords

Anti tumor; Electrocatalysis; Estertin derivatives; Polyoxometalate; Sandwich type structure; Tungstoantimonate

Indexed keywords


EID: 77952100087     PISSN: 13877003     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.inoche.2010.02.015     Document Type: Article
Times cited : (28)

References (49)
  • 45
    • 77952104162 scopus 로고    scopus 로고
    • α-Na9[SbW9O33]{bullet operator}19.5H2O was synthesized according to the literature and characterized by IR spectrum [11a, Organotins Cl3Sn(CH2)2COOCH3 and Cl3SnCH2CH(CH3)COOCH3 were prepared by the literature and characterized by IR [13b, Synthesis of 1. 0.62 g Cl3Sn(CH2)2COOCH3 (2.0 mmol) was dissolved in 10.0 mL H2O to form solution A, and 2.84 g Na9[SbW9O33]·19.5H2O (1.0 mmol) was dissolved in 10.0 mL H2O to form solution B. Then, solution A was added dropwise to solution B. The resulting solution was sealed in a 50 mL-beaker and stirred for 26 h at room temperature. After filtration, 3.16 g KCl solid was added to the filtrate, and white precipitate was immediately obtained. The white crude product was collected by filtration and
    • -1): 1624(s), 1310(w), 1266(s), 954(s), 852(sh), 802(s), 750(s), 526(w), 479(w), and 439(s).
  • 46
    • 77952103460 scopus 로고    scopus 로고
    • The crystal data were collected at 298 K on a Bruker Smart APEX II X-diffractometer equipped with graphite monochromated Mo-Kα radiation (λ, 0.71073 Å, An empirical absorption correction was applied using the SADABS program. The structure was solved by the direct method and refined by full-matrix least squares on F2 using the SHELXL-97 software [16, Cell parameters were obtained by the global refinement of the positions of all collected reflections. All the non-hydrogen atoms were refined anisotropically. Hydrogen atoms on C atoms were added in calculated positions. The crystal data and structure refinements of compounds 1 and 2 are summarized in Table S1. Selected bond lengths and angles are listed in Table S2 and S3. Crystal data for 1: C12H48K4Na6O90Sb2Sn4W18, M, 5954.32, Triclinic, space group Pī, a, 11.9767(15) Å, b, 12.5712(15) Å, c, 17.38
    • - 3, R1(wR2) = 0.0677 (0.1824) and S = 1.019 for 8291 independent reflections with I > 2σ(I). CCDC reference numbers: 741327 for 1 and 751985 for 2.
  • 48
    • 77952105791 scopus 로고    scopus 로고
    • Elemental analyses (H and C) were performed on a Perkin-Elmer 2400CHN elemental analyzer. W, Sb, Sn, K and Na were analyzed on a PLASMA-SPEC-II, LEEMAN(USA) ICP atomic emission spectrometer. IR spectra were recorded in the range of 4000-220 cm-1 on a JASCO FT-IR-480 spectrophotometer using KBr pellets. TG analyses were performed on a Pyris Diamond TG/DTA instrument in flowing N2 with a heating rate of 10 °C min-1. Electrochemical measurements were carried out on a CHI 604B electrochemical workstation at room temperature. The working electrode was the glassy carbon electrode. A platinum wire was used as the counter electrode and an Ag/AgCl (3 M KCl) was the reference electrode. In anti-tumor experiments, the cells were cultured in 1640 supplemented with 10% FCS, and maintained in 5% CO2 at 37 °C.In MTT assays, a sample was dissolved in 10% FCS and filtered through a 0.22 μm pore filtration membrane. The concent
    • 2 at 37 °C.In MTT assays, a sample was dissolved in 10% FCS and filtered through a 0.22 μm pore filtration membrane. The concentration of stock 1 was adjusted to 10, 50, 100, 500 or 1000 μg/mL for 48 h and followed by a four-hour-incubation with MTT. The MTT transformed crystals were dissolved in dimethyl sulfoxide, and absorbance at 490 nm was measured using a microplate reader.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.