Molecular insertion regulates the donor-acceptor interactions in cocrystals for the design of piezochromic luminescent materials

Zhai, ChunguangState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)

Developing a universal strategy to design piezochromic luminescent materials with desirable properties remains challenging. Here, we report that insertion of a non-emissive molecule into a donor (perylene) and acceptor (1,2,4,5-tetracyanobezene) binary cocrystal can realize fine manipulation of intermolecular interactions between perylene and 1,2,4,5-tetracyanobezene (TCNB) for desirable piezochromic luminescent properties. A continuous pressure-induced emission enhancement up to 3 GPa and a blue shift from 655 to 619 nm have been observed in perylene-TCNB cocrystals upon THF insertion, in contrast to the red-shifted and quenched emission observed when compressing perylene-TCNB cocrystals and other cocrystals reported earlier. By combining experiment with theory, it is further revealed that the inserted non-emissive THF forms blue-shifting hydrogen bonds with neighboring TCNB molecules and promote a conformation change of perylene molecules upon compression, causing the blue-shifted and enhanced emission. This strategy remains valid when inserting other molecules as non-emissive component into perylene-TCNB cocrystals for abnormal piezochromic luminescent behaviors.

Yin, XiuState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Niu, ShifengState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Yao, MingguangState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Hu, ShuheState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Dong, JiajunState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Shang, YuchenState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Wang, ZhigangInstitute of Atomic and Molecular Physics, Jilin University, Changchun, China (author)
Li, QuanjunState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
Sundqvist, BertilUmeå universitet,Institutionen för fysik,State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China(Swepub:umu)besu0001 (author)
Liu, BingbingState Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, ChinaInstitute of Atomic and Molecular Physics, Jilin University, Changchun, China (creator_code:org_t)

By the author/editor: Zhai, Chunguang; Yin, Xiu; Niu, Shifeng; Yao, Mingguang; Hu, Shuhe; Dong, Jiajun; show more...; Shang, Yuchen; Wang, Zhigang; Li, Quanjun; Sundqvist, Berti ...; Liu, Bingbing; show less...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Other Health Sci ...

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