A Highly Stable 3D Acentric Zinc Metal–Organic Framework Based on Two Symmetrical Flexible Ligands: High Second-Harmonic-Generation Efficiency and Tunable Photoluminescence

A 3D metal–organic framework (MOF), [Zn­(BPHY)­(SA)]n (1; BPHY = 1,2-bis­(4-pyridyl)­hydrazine, H2SA = succinic acid), which crystallizes in a noncentrosysmmetric space group (Cc), has been solvothermally obtained and testified to be a good nonlinear-optical material with the largest second-harmonic-generation response among the known MOFs based on sysmmetric ligands and high stability. Ultraviolet-to-visible tunable emission for 1 is observed.