Jump to main content
Jump to site search

Issue 14, 2021
Previous Article Next Article

Molecular motion of halogenated ethylammonium/[18]crown-6 supramolecular ions in nickel dithiolate magnetic crystals

Author affiliations

Abstract

Supramolecular cations, consisting of ethylammonium derivatives (X–CH2CH2–NH3+) complexed with [18]crown-6, were incorporated into [Ni(dmit)2] crystals in order to promote molecular motion. Crystals of (X–CH2CH2–NH3+)([18]crown-6)[Ni(dmit)2] (1: X = H, 2: X = F, 3: X = Cl and 4: X = Br) were prepared for this purpose. Although large amplitude molecular motions do not occur in crystal 1, dynamic disorder of F–CH2 groups takes place between two sites in crystal 2. Similar disorder of Cl–CH2 groups along with rotation of [18]crown-6 molecules also exists in crystal 3. Crystal 4 exhibits dynamic disorder of Br–CH2–CH2 groups between four sites. This is especially the case for crystal 4 which undergoes a distinct dielectric response with relaxer-like behavior in the temperature dependence of the dielectric loss tangent. Interactions between [Ni(dmit)2] ions in all crystals are antiferromagnetic, and the magnitudes of the interactions are qualitatively consistent with the strength of intermolecular interactions estimated from transfer integrals, where interactions within [Ni(dmit)2] dimers are the larger than the others in all crystals.

Graphical abstract: Molecular motion of halogenated ethylammonium/[18]crown-6 supramolecular ions in nickel dithiolate magnetic crystals

Back to tab navigation

Supplementary files

Article information


Submitted
22 Feb 2021
Accepted
01 Mar 2021
First published
10 Mar 2021

CrystEngComm, 2021,23, 2756-2763
Article type
Paper

Molecular motion of halogenated ethylammonium/[18]crown-6 supramolecular ions in nickel dithiolate magnetic crystals

N. Hasuo, K. Takahashi, I. Hisaki, K. Kokado and T. Nakamura, CrystEngComm, 2021, 23, 2756
DOI: 10.1039/D1CE00253H

Social activity

Search articles by author

Spotlight

Advertisements