Abstract
Luminescent metal‐organic frameworks (LMOFs) as sensors with “turn‐on” detecting ability have attracted much attention and remain challenging yet. Herein, two novel LMOFs from homonuclear Mn (II)‐MOF (1) to heteronuclear Mn (II)‐K(I)‐MOF (2) have been synthesized directionally only by alkali regulation. Through the introduction of K(I), heteronuclear 2 exhibits a porous reticulated network with 1D open channels. Both 1 and 2 are highly emissive and show great sensitivity and selectivity, ultrafast response time, and excellent recyclability for “off–on” ascorbic acid sensing. Significantly, the highly permeable channels in 2 allow easy host–guest interaction and contribute to lower detection limit than 1. The controllable assembly of 1 and 2 realizes a novel mode of structure and luminescence tunability, which is crucial for discovering luminescent materials with high‐performance for real‐time detection applications.
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