A Rotorlike Supramolecular Assembly, {[K(18-crown-6)]PbI3}∞, with a Reversible Breaking-Symmetry Phase Transition near Room Temperature.

Guo-Jun YuanDong-Sheng ShaoBing-Wen HuWen-Long LiuXiao Ming Ren

Published in: Inorganic chemistry (2020)

A rotorlike supramolecular crystal, {[K(18-crown-6)]PbI3}∞, is composed of a linear [PbI3]∞ chain acting as a stator and [K(18-crown-6)]+ cations fastened to the [PbI3]∞ chain and K-I bond like rotators and axes, respectively. A reversible breaking-symmetry phase transition occurs at ∼305 K. Variable-temperature 1H NMR spectra and dielectrics were used for the dynamic analysis of [K(18-crown-6)]+ cations in the crystal.

Keyphrases

room temperature
perovskite solar cells
ionic liquid
solid state
high resolution
transition metal
neural network