Design and Construction of a Chiral Cd(II)-MOF from Achiral Precursors: Synthesis, Crystal Structure and Catalytic Activity toward C-C and C-N Bond Forming Reactions

Vijay Gupta; Sanjay K Mandal

doi:10.1021/acs.inorgchem.8b03307

Design and Construction of a Chiral Cd(II)-MOF from Achiral Precursors: Synthesis, Crystal Structure and Catalytic Activity toward C-C and C-N Bond Forming Reactions

Inorg Chem. 2019 Mar 4;58(5):3219-3226. doi: 10.1021/acs.inorgchem.8b03307. Epub 2019 Feb 18.

Authors

Vijay Gupta¹, Sanjay K Mandal¹

Affiliation

¹ Department of Chemical Sciences , Indian Institute of Science Education and Research Mohali , Sector 81, Manauli PO, S.A.S. Nagar, Mohali , Punjab 140306 , India.

PMID: 30776216
DOI: 10.1021/acs.inorgchem.8b03307

Abstract

Using achiral components, a V-shaped dicarboxylic acid (H₂L) and a conformationally flexible bidentate linker (bpp), a thermally stable chiral metal organic framework {[Cd(bpp)(L)(H₂O)]·DMF} _n (1), where H₂L = 4,4'-(dimethylsilanediyl)bis-benzoic acid, bpp = 1,3-bis(4-pyridyl)propane and DMF = N,N-dimethylformamide, has been solvothermally synthesized and crystallographically characterized. It consists of 1D helical chains linked at the cadmium centers resulting in an overall 2D framework. Its microporous nature was confirmed by gas-sorption measurements. Upon thermal activation of 1, where both guest DMF molecules present in the 1D open channels and the coordinated H₂O molecules are removed, its active metal site shows Lewis acid character to be an excellent heterogeneous catalyst for the C-C (Knoevenagel condensation reaction) and C-N (Strecker) bond forming reactions.