Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/90776
Title: Synthesis of some selenacrown ethers and the thermodynamic origin of their complexation with C60
Authors: Liu, Yu
Han, Jian Rong
Zhao, Yanli
Zhang, Heng Yi
Duan, Zhong Yu
Keywords: DRNTU::Science::Biological sciences::Biochemistry
Issue Date: 2005
Source: 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.
Series/Report no.: Journal of inclusion phenomena and macrocyclic chemistry
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.
URI: https://hdl.handle.net/10356/90776
http://hdl.handle.net/10220/7138
DOI: 10.1007/s10847-005-0662-6
Schools: School of Physical and Mathematical Sciences 
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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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