Abstract
Controlling polymorphism, namely, the occurrence of multiple crystal forms for a given compound, is still an open technological challenge that needs to be addressed for the reliable manufacturing of crystalline functional materials. Here, we devised a series of 13 organic crystals engineered to embody molecular fragments undergoing specific nanoscale motion anticipated to drive cooperative order-disorder phase transitions. By combining polarized optical microscopy coupled with a heating/cooling stage, differential scanning calorimetry, X-ray diffraction, low-frequency Raman spectroscopy, and calculations (density functional theory and molecular dynamics), we proved the occurrence of cooperative transitions in all the crystalline systems, and we demonstrated how both the molecular structure and lattice dynamics play crucial roles in these peculiar solid-to-solid transformations. These results introduce an efficient strategy to design polymorphic molecular crystalline materials endowed with specific molecular-scale lattice and macroscopic dynamics.
Original language | English |
---|---|
Pages (from-to) | 31911-31919 |
Number of pages | 9 |
Journal | Journal of the American Chemical Society |
Volume | 146 |
Issue number | 46 |
Early online date | 8 Nov 2024 |
DOIs | |
Publication status | Published - 20 Nov 2024 |
Funding
L.C. thanks the University of Modena and Reggio Emilia for financial support. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 801505. R.S. acknowledges the Weizmann Institute of Science, Israel, for funding. G.L. thanks the Jiangsu Specially Appointed Professor Foundation. M.T.R. thanks the USA National Science Foundation for support (DMR-2348765). P.N. thanks New York University Abu Dhabi for financial support. This material is based upon work supported by Tamkeen under NYUAD RRC Grant No. CG011. G.S. is a Belgian National Fund for Scientific Research (FNRS) Research Associate.
All Science Journal Classification (ASJC) codes
- Catalysis
- General Chemistry
- Biochemistry
- Colloid and Surface Chemistry