Switching hydrogen bonds to readily interconvert two room-temperature long-term stable crystalline polymorphs in chiral molecular perovskites

abstract

It is challenging to endow polymorphs with both long-term stability and easy interconvertibility. We demonstrate an interesting example that two room-temperature polymorphs could be long-term stable yet easily interconvertible, at a pressure of similar to 4.8 MPa and a temperature of 120 degrees C, by switching hydrogen bonds via collective reorientation of organic cations in chiral molecular perovskites.

keywords

ORGANIC-INORGANIC PEROVSKITES; PHASE-CHANGE MATERIALS; HIGH-PRESSURE; DIAMOND; TRANSFORMATION; TRANSITION; GRAPHITE; PRINCIPLES; MECHANISM; DYNAMICS

subject category

Chemistry

authors

Hu, WH; Xu, WJ; Meng, QR; Zhang, XW; He, CT; Zhang, WX; Chen, XM

Groups

acknowledgements

This work was supported by NSFC (21722107, 21671202, 21805312 and 21821003) and, the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01C161). We thank the reviewers for their valuable comments on the manuscript.

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