| Title: | Macrocycle Co-Crystals Showing Vapochromism to Haloalkanes |
| Address: | "College of Science, Center for Supramolecular Chemistry and Catalysis, Shanghai University, Shanghai, 200444, P. R. China. Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin, 300387, P. R. China" |
| ISSN/ISBN: | 1521-3773 (Electronic) 1433-7851 (Linking) |
| Abstract: | "Organic co-crystal engineering is a promising method to make multifunctional materials. Here, the marriage of macrocyclic chemistry and co-crystal engineering provides a smart strategy to build vapochromic materials. The macrocycle co-crystals (MCCs) were constructed from pi-electron rich pillar[5]arene (P5) and an electron-deficient pyromellitic diimide derivative (PDI) on a 10 g scale. MCCs of P5-PDI are in red owing to the formation of a charge-transfer (CT) complex. After solvent removal, a white crystalline solid with a new structure (P5-PDIalpha) is yielded, which exhibits selective vapochromic responses to volatile organic compounds (VOCs) of haloalkanes, accompanied by color changes from white to red or orange. Powder and single-crystal X-ray diffraction analyses reveal that the color changes are attributed to the vapor-triggered solid-state structural transformation to form CT co-crystals. Coating films of P5 and PDI on glass showed a visible vapochromic behavior with good reversibility" |
| Keywords: | co-crystals haloalkanes macrocycles pillararenes vapochromism; |
| Notes: | "PubMed-not-MEDLINELi, Bin Cui, Lei Li, Chunju eng 21971192/National Natural Science Foundation of China/ 21772118/National Natural Science Foundation of China/ Germany 2020/08/26 Angew Chem Int Ed Engl. 2020 Dec 1; 59(49):22012-22016. doi: 10.1002/anie.202010802. Epub 2020 Sep 30" |
