Luminescent microporous metal-organic framework with functional Lewis basic sites on the pore surface: Quantifiable evaluation of luminescent sensing mechanisms towards Fe3+

A systematic study has been conducted on a novel luminescent metal-organic framework, {[Zn(bpyp)(L-OH)] center dot DMF center dot 2H(2)O}(n) (1), to explore its sensing mechanisms to Fe3+. Structure analyses show that compound 1 exist pyridine N atoms and -OH groups on the pore surface for specific sensing of metal ions via Lewis acid-base interactions. On this consideration, the quenching mechanisms are studied and the processes are controlled by multiple mechanisms in which dynamic and static mechanisms are calculated, achieving the quantification evaluation of the quenching process. This work not only achieves the quantitative evaluation of the luminescence quenching but also provides certain insights into the quenching process, and the possible mechanisms explored in this work may inspire future research and design of target luminescent metal-organic frameworks (LMOFs) with specific functions. (C) 2016 Elsevier Inc. All rights reserved.