Coordinate Anchoring of Mixed Luminophores in Two Isostructural Hybrid Layers to Achieve Tunable Room-Temperature Phosphorescence

Abstract

Room-temperature phosphorescence (RTP) materials have widespread applications in biological imaging, anticounterfeiting, and optoelectronic devices. Because of the predesignability of metal–organic complexes (MOCs), the RTP materials based on MOC systems have received huge attention from researchers. The coordinate anchoring of luminophores to enhance the rigidity of organic molecules and restrict the nonradiative transition offers opportunities for generating MOC materials with captivating RTP performance. Hitherto, most of the MOC-based RTP materials feature a single luminophore ligand. The development of new MOC systems with RTP functionality is still challenging. Herein, we use the mixed-ligand synthetic strategy to produce isostructural MOCs, [Zn(TIMB)(X2-TPA)]·H2O (1, X = Cl; 2, X = Br; TIMB = 1,3,5-tris(2-methyl-1H-imidazol-1-yl)benzene; H2-X2-TPA = 2,5-dichloroterephthalic and 2,5-dibromoterephthalic acid), and modulate the RTP properties of resultant products via the synergy of coordinate anchoring and substitution synthesis. 1 and 2 feature similar coordination layers composed of neutral TIMB and anionic X2-TPA2– ligands, which provide a good structural model to tune the RTP performances of final products via substitution synthesis. Different from the reported RTP materials based on MOC systems, our study provides a general way to build and modulate MOC-based RTP materials with the assistance of coordinate anchoring and substitution synthesis strategies.

Recent Advances in Room‐Temperature Phosphorescence Metal–Organic Hybrids: Structures, Properties, and Applications

“…Li and co-workers proposed a mixed-ligand synthetic strategy to produce isostructural metal-organic complexes (MOCs) and modulate the RTP properties (Figure 5b). [35] By regulating the excitation wavelength, the phosphorescence color of MOCs can be tuned from cyan to yellow (X = Cl) or green to yellow (X = Br). Gao et al synthesized a pair of homochiral MOFs (DCF-12 and LCF-12) as nanocontainers, after pyrene embedded into introduced the nanocontainers, both pyrene@DCF-12 and pyrene@ LCF-12 demonstrated fascinating multicolor RTP (Figure 5c).…”

“…Li and co‐workers proposed a mixed‐ligand synthetic strategy to produce isostructural metal–organic complexes (MOCs) and modulate the RTP properties (Figure 5b). [ 35 ] By regulating the excitation wavelength, the phosphorescence color of MOCs can be tuned from cyan to yellow (X = Cl) or green to yellow (X = Br). Gao et al.…”

“…b) Crystal structure in the layer of MOFs constructed by dual ligands. Reproduced with permission [35]. Copyright 2022, American Chemical Society.…”

Mechanochemical Synthesis of Cuprous Complexes for X-ray Scintillation and Imaging

“…Scintillators have garnered considerable attention due to their vital applications in diverse fields, encompassing security identification, medical diagnosis, and radiation detection. − Currently, inorganic single-crystal scintillators, such as CsI:Tl, Bi 4 Ge 3 O 12 (BGO), and CaF 2 :Eu, are extensively utilized due to their superior light yield and outstanding X-ray absorption coefficients. , However, challenges such as high synthesis difficulty, lengthy production time, high growth temperature, and scarce raw material sources have impeded the low-cost, large-area production of inorganic scintillators. ,, Recently, lead halide perovskite scintillators and metal–organic halide materials have demonstrated outstanding performance. , However, these scintillator materials are primarily synthesized through the solution chemistry method, which involves the use of a substantial amount of organic solvents, contradicting the requirements of green chemistry development. − Therefore, the rapid and cost-effective synthesis of high-performance scintillator materials, using minimal or no organic solvents, holds significant application value.…”

A reversible room temperature phosphorescence/delayed fluorescence switch trigged by solvent exchange in a Ca-based coordination polymer

“…[23][24][25] To date, some CPs exhibiting interesting RTP properties have been reported. [19][20][21] However, most of the RTP properties are caused by the framework itself, [26][27][28][29][30][31] and the RTP properties caused by the guest molecules/ions themselves or RTP switching caused by guest changes are rare. [32][33][34] Considering the porous properties of many CPs, 31,35,36 it is undoubtedly of great significance to study the latter for the development of new sensor and switch materials.…”