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Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60

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Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60

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dc.contributor.author Liu, Yu
dc.contributor.author Han, Jian Rong
dc.contributor.author Zhao, Yanli
dc.contributor.author Zhang, Heng Yi
dc.contributor.author Duan, Zhong Yu
dc.date.accessioned 2011-10-03T08:01:05Z
dc.date.available 2011-10-03T08:01:05Z
dc.date.copyright 2005
dc.date.issued 2011-10-03
dc.identifier.citation Liu, Y., Han, J. R., Zhao, Y. L., Zhang, H. Y., & Duan, Z. Y. (2005). Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 51, 191-198.
dc.identifier.uri http://hdl.handle.net/10220/7138
dc.description.abstract Two new selenacrown ethers, i.e., N,N'-dimethyl-1,11-diaza-4,8,14,18,-tetraselenacycloicosane (1) and 7,11- diseleno-2,3,15,16,-dibenzo-1,4,14,17,20,23-hexaoxacyclopentacosane (2), have been synthesized and characterized by elemental analysis and UV, and 1H-NMR spectroscopy. An X-ray crystallographic structure was obtained for 1. UV-spectrophotometric titrations have been performed in CCl4 solution at 25–50 °C to obtain the complex stability constants (Ks) and the thermodynamic parameters (ΔH° and TΔS°) for the stoichiometric 1:1 complexation of [60]-fullerene (C60) with the crown ethers 1–4. The obtained Ks values together with that reported for dicyclohexano-24-crown-8 (5) reveal that, the more the heteroatom numbers in crown ether ring are, and the larger the cavity sizes of crown ethers are, the higher the Ks values for complexation with C60 are. Thermodynamically, the complexation of C60 with 1–5 is absolutely enthalpy-driven in CCl4, while the complex stability is governed by the entropy term.
dc.format.extent 8 p.
dc.language.iso en
dc.relation.ispartofseries Journal of inclusion phenomena and macrocyclic chemistry
dc.rights © 2005 Springer. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Inclusion Phenomena and Macrocyclic Chemistry, Springer.  It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document.  The published version is available at: http://dx.doi.org/10.1007/s10847-005-0662-6.
dc.subject DRNTU::Science::Biological sciences::Biochemistry.
dc.title Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60
dc.type Journal Article
dc.contributor.school School of Physical and Mathematical Sciences
dc.identifier.doi http://dx.doi.org/10.1007/s10847-005-0662-6
dc.description.version Accepted version
dc.identifier.rims 159706

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