Inorganic anions dependent orientation of ammonium cations in crown ether–ammonium cation–inorganic anion system

Supramolecular assembly of crown ether with 2-hydroxypropane-1,3-diamino, 4-methylaniline and 4-iodoaniline in the presence of HClO4 and HBF4 have been prepared and characterized. The inorganic anions pay a key role in the construction of supramolecular architectures of crown ether–ammonium cation–i...

Full description

Saved in:
Bibliographic Details
Published inPolyhedron Vol. 69; pp. 160 - 166
Main Authors Luo, Yang-Hui, Song, Wen-Tao, Ge, Shu-Wang, Sun, Bai-Wang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 17.02.2014
Subjects
Crown ether
Inorganic anions
Orientation
Rotator-stator assembly
Crown ether
Rotator-stator assembly
Orientation
Inorganic anions
Online AccessGet full text

Cover

More Information
Summary:Supramolecular assembly of crown ether with 2-hydroxypropane-1,3-diamino, 4-methylaniline and 4-iodoaniline in the presence of HClO4 and HBF4 have been prepared and characterized. The inorganic anions pay a key role in the construction of supramolecular architectures of crown ether–ammonium cation–inorganic anion system. Five supramolecular assembly complexes: 2-hydroxypropane-1,3-diammonium-perchlorate-18-crown-6 ([C3H12N2O-(18-crown-6)2]2+·2[ClO4]−, 1); 2-hydroxypropane-1,3-diammonium-tetrafluoroborate-18-crown-6 ([(C3H12N2O)2-(18-crown-6)3]2+·2[BF4]−, 2); 4-methylanilinium perchlorate-18-crown-6 ([C7H10N-(18-crown-6)]+·[ClO4]−, 3); 4-iodineanilinium-tetrafluoroborate-18-crown-6 ([C6H7NI-(18-crown-6)]+·[BF4]−, 4); 4-methylanilinium tetrafluoroborate-18-crown-6 ([C7H10N-(18-crown-6)]+·[BF4]−, 5), for the investigation of the influence of different inorganic anions on the orientation of ammonium cation and host–guest interaction of crown ethers, have been synthesized and characterized. The results revealed that ClO4− anion lead to the 2:1 composition of crown and ammonium cation in monoclinic space group and 3:2 composition of crown and ammonium cation in the presence of BF4− anion for double-anilinium system (complexes 1 and 2). While for the single-anilinium system (complexes 3, 4, and 5), the different inorganic anions lead to quite different orientation of the ammoniums in orthorhombic space group. We also studied the TGA/DSC properties, Raman spectrascopy and hot stage microscopy for the five complexes.
ISSN:0277-5387
DOI:10.1016/j.poly.2013.11.031