Assembly of One-, Two-, and Three-Dimensional Cu(I)-Based Coordination Frameworks for Tunable White Light Emission and Effective Fluorescence Sensing
Guang-Yu Fan, Yilin Wang, Song‐De Han, Zhen‐Zhen Xue, Jie Pan
Abstract
By assembling a tetradentate N-donor ligand tetra(pyridine-4-yl)benzene-1,4-diamine (TBD) with a copper ion, three novel Cu(I)-based coordination frameworks, bearing one-, two-, and three-dimensional (3D) architectures, namely, [Cu 2 Br 2 (TBD)·H 2 O] ( 1 ), [Cu 2 Br 2 (TBD)] ( 2 ), and [CuI(TBD)] ( 3 ), have been synthesized and characterized. Owing to the different coordination modes of [Cu 2 Br 2 ] dinuclear units, compounds 1 and 2 display distinct structures with double-stranded chains for 1 and 4-connected layers for 2 . Compound 3 presents a (3,4)-connected 3D network, which is fabricated from neutral Cu-TBD layers with the bridging organic ligands. Solid-state photoluminescence test implies that the three compounds exhibit bright yellow emissions with the luminescence lifetime at a microsecond scale. Interestingly, through the alternation of the ratios with compound 3 and blue phosphor, tunable luminescence emissions from yellow to white light have been achieved. Moreover, the luminescence sensing ability toward various metal cations was examined on 1 . The compound could be competent to serve as a selective fluorescent probe for the recognition of Fe 3+ despite the existence of other interferences.