2020同步年報

026 ACTIVITY REPORT 2020 surface of a defective MOF with limited porosity named AlTz-53 is initially modified with hydrophobic alkyl chains through click reactions on the tetrazine groups. The internal framework subsequently undergoes a lattice rearrange- ment upon solvent desorption, leading to a significantly improved internal porosity and material crystallinity. Func- tionalizing the surface of AlTz-68 with octadecene (AlTz- 68-C18) induces superhydrophobicity with water contact angle 173.6°. AlTz-68-C18 also exhibits one of the largest BET surface areas among all reported superhydrophobic framework materials. In summary, the desorption-triggered domino rearrange- ment of AlTz-53-DEF also exhibits a new paradigm for the design and preparation of novel copolymers, high-crystal- line covalent organic frameworks and metal alloys from volatile precursors, wherein monomers or functional groups or other components could potentially enable the desorp- tion-triggered domino rearrangement. (Reported by Chia- Her Lin, National Taiwan Normal University) This report features the work of (1) Chia-Her Lin and his collaborators published in Nat. Chem. 12 , 90 (2020); and (2) Chia-Her Lin and his collaborators published in Matter 2 , 988 (2020). TPS 09A Temporally Coherent X-ray Diffraction TLS 01C2 SWLS – X-ray Powder Diffraction • PXRD • Porous Materials, Inorganic Chemistry, Environmental Science References 1. S. H. Lo, L. Feng, K. Tan, Z. Huang, S Yuan, K. Y. Wang, B. H. Li, W. L. Liu, G. S. Day, S. Tao, C. C. Yang, T. T. Luo, C. H. Lin, S. L. Wang, S. J. L. Billinge, K. L. Lu, Y. J. Chabal, X. Zou, H.-C. Zhou, Nat. Chem. 12 , 90 (2020). 2. L. Feng, S. H. Lo, K. Tan, B. H. Li, S. Yuan, Y. F. Lin, C. H. Lin, S. L. Wang, K. L. Lu, H.-C. Zhou, Matter 2 , 988 (2020). Fig. 2 : Characterization of a reversible transformation between AlTz-53 and AlTz-68. (a-b) Rietveld refinement of PXRD patterns for AlTz-53-DEF and AlTz-68 from a synchrotron source (λ = 1.0332 Å, measured from TLS 01C2 ). (c-f) PXRD patterns (λ = 1.5418 Å). [Reproduced from Ref. 1]