Sandwich-type phosphate complexes were formed by macrocyclicligands incorporating both anion- (tris-urea unit) and cation-binding sites (polyether), which display a reversible rotation around the anion upon protonation/deprotonation of phosphate and binding of the cation (Emim+).
Synthesis and properties of a new series of trögerophanes
作者:Alhussein A. Ibrahim、Mutsumi Matsumoto、Yuji Miyahara、Kenji Izumi、Masahiko Suenaga、Nobujiro Shimizu、Takahiko Inazu
DOI:10.1002/jhet.5570350139
日期:1998.1
A newseries of macrocyclic compounds with one or two Tröger base skeletons has been synthesized by condensing mono-, di-, tri-, and teraethyleneglycol bis(p-aminophenoxy) ethers with formalin in the presence of concentrated hydrochloric acid in ethanol at room temperature for 13 days. This simple one-step cyclization provided 19 in remarkably high yield (46%) and 17, 18, and 20 in yields reflecting
New supramolecular hosts: Synthesis and cation binding studies of novel Tröger's base-crown ether composites
作者:Alla Manjula、Madhavarao Nagarajan
DOI:10.1016/s0040-4020(97)00759-x
日期:1997.8
A simple and straightforward synthesis of a novel class of supramolecular hosts containing the Tröger's base moiety is reported. The cationbinding properties of these macrocycles were investigated using Cram's picrate extraction method.
Conformational Study of Isobutenylene Chains in Tandem Claisen Rearrangement Products. Insights from X-ray Crystallography and<sup>1</sup>H NMR for Salicylideneaniline Derivatives
A new variety of salicylideneaniline derivatives were prepared from a substituted aniline and a bis(hydroxybenzaldehyde) which has been synthesized through a tandem Claisenrearrangement reaction. X-ray crystal structures were obtained for many of the products. With respect to the conformation of their isobutenylene chain, the crystal structures can be classified into three groups: i.e., skew–skew
Liquid crystal dimers having vary oxyethylene flexible spacers
作者:Joo Hoon Park、Bal Sydulu Singu、Ok Byung Choi、Hwan Myung Lee、Jin Young Lee、Sung Jo Kim、Eun Hee Cha、Seon Nam Park、Myeong Heon Kwak、Bong Keun So、Ran Hee Kim、Soo Min Lee、Kuk Ro Yoon
DOI:10.1080/15421406.2016.1263102
日期:2017.6.13
In this article, we are prepared that the liquid crystal dimers have aromatic-ester type mesogenic units or aromatic-Schiff base typemesogonic units and confirmed by H-1-NMR spectrometry. The mesomorphic and optical properties of the resultant dimers were studied by differential scanning calorimetry and polarizing optical microscopy.