Affiliation:
1. State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. School of Science Jiangxi University of Science and Technology Ganzhou 341000 China
4. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 China
Abstract
AbstractBirefringent crystals could modulate the polarization of light and are widely used as polarizers, waveplates, optical isolators, etc. To date, commercial birefringent crystals have been exclusively limited to purely inorganic compounds such as α‐BaB2O4 with birefringence of about 0.12. Herein, we report a new hydrogen bonded supramolecular framework, namely, Cd(H2C6N7O3)2⋅8 H2O, which exhibits exceptionally large birefringence up to about 0.60. To the best of our knowledge, the birefringence of Cd(H2C6N7O3)2⋅8 H2O is significantly larger than those of all commercial birefringent crystals and is the largest among hydrogen bonded supramolecular framework crystals. First‐principles calculations and structural analyses reveal that the exceptional birefringence is mainly ascribed to strong covalent interactions within (H2C6N7O3)− organic ligands and the perfect coplanarity between them. Given the rich structural diversity and tunability, hydrogen bonded supramolecular frameworks would offer unprecedented opportunities beyond the traditional purely inorganic oxides for birefringent crystals.
Funder
National Natural Science Foundation of China
Youth Innovation Promotion Association of the Chinese Academy of Sciences
Natural Science Foundation of Fujian Province
Subject
General Chemistry,Catalysis
Cited by
9 articles.
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