Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 695, Issue 18, Pages 2134-2141Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2010.05.027
Keywords
Metallacrown; Organotin(IV); Structural characterizations; Fluorescence properties; Antitumor activities
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Funding
- National Natural Science Foundation of China [20671048]
- Shandong Tai-Shan Scholar Research Fund
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Five 12-MC-4 organotin(IV) metallacrowns(MCs) with the types of [12-MCRSn(IV)N(shi)-4] (R - Et (1), Bu (2), Ph (3); H(3)Shi = salicylhydroxamic acid) and [12-MCRSn(IV)N(Clshi)-4] (R = Et (4), Bu (5), H(3)Clshi = 5-chlorosalicylhydroxamic acid) have been synthesized and characterized by elemental analyses, IR and TGA. X-ray single-crystal diffraction analyses were also carried out and showed that all complexes 1-5 contain a neutral 12-membered metallacrown ring which is formed by the succession of four repeating units of -[Sn-N-O]-, indicating the substituents on the tin(IV) atom are uninfluential in coordination of organotin(IV) centers with hydroxamic acid. Fluorescence properties of complexes 1-5 have been investigated, where complex 3 displays strong fluorescence emissions in the blue region. In addition, antitumor activities of complexes 4 and 5 have also been tested, and both the complexes exhibit weak activity towards human hepatocellular carcinoma cell line (Bel-7402) and Hela cell line. (c) 2010 Elsevier B.V. All rights reserved.
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