AI Article Synopsis
- Researchers developed a chiral hexagonal perovskite that has two stable crystalline forms at room temperature, which show distinct second-harmonic-generation (SHG) signals different from one another by about 18 times.
- These two forms can be interconverted through thermal or pressure changes, thanks to the unique behavior of hydrogen bonds affected by the orientation of specific organic molecules.
- The study highlights that irregular organic cations play a crucial role in modifying inorganic structures, resulting in significantly different optical properties in these room-temperature polymorphs.
Article Abstract
Endowing room-temperature polymorphs with both long-term stability and easy interconvertibility is a big challenge due to the complexity of intermolecular interactions. Herein, we present a chiral hexagonal perovskite (R-3-hydroxy-1-methylpiperidinium)[CdCl ] having two room-temperature crystalline forms featuring obviously distinct second-harmonic-generation (SHG) signals with a high switching contrast of ~18 times. The two room-temperature forms could be long-term stable yet easily interconvertible through an irreversible thermal-induced phase transition and a pressure-driven backward transition, by switching hydrogen bonds via collective reorientation of ordered homochiral cations. Based on the essential role of homochiral organic cations in inducing switchable hydrogen bond linkages, this present instance provides good evidence that relatively irregular organic cations could induce more obvious inorganic chain deformations, thus endowing polymorphs with significantly different SHG signals at room temperature.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/asia.202300608 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!