2018
DOI: 10.1021/acs.cgd.7b01726 View full text |Buy / Rent full text
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Abstract: T w o n o v e l p o r o u s M O F s , [Zn 5 (DpImDC) have been solvothermally synthesized by using a ligand consisting of a 4,5-imidazoledicarboxylic acid part and an isophthalic acid part. Two compounds have similar structures and connections, but with significant differences in symmetry (monoclinic and orthorhombic) due the cis− trans isomerism in a mononuclear metal node. Moreover, JLU-MOF48 exhibits notable luminescent properties and owns outstanding performance for detecting nitroaromatic explosives, esp… Show more

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“…It has a good linear relationship at a low concentration, and the quenching coefficient is K SV = 2.69 × 10 4 (Figure 9b), almost equal to the value of the reported luminescent MOF [Zn 5 (DpImDC) 2 (DMF) 4 (H 2 O) 3 ]·H 2 O·DMF. 69 In addition, the detection limit (3σ/ K SV ) of 4-NP was deduced to be 5.75 × 10 –7 M (Figure S12), which is comparable to that of the reported MOFs for sensing 4-NP, 70 calculated from the equation 3σ/ k (σ, standard error; K SV , slope). 71 Thus, 5 can be considered as a potential candidate for the selective sensing of 4-NP molecules.…”
Section: Resultssupporting
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“…It has a good linear relationship at a low concentration, and the quenching coefficient is K SV = 2.69 × 10 4 (Figure 9b), almost equal to the value of the reported luminescent MOF [Zn 5 (DpImDC) 2 (DMF) 4 (H 2 O) 3 ]·H 2 O·DMF. 69 In addition, the detection limit (3σ/ K SV ) of 4-NP was deduced to be 5.75 × 10 –7 M (Figure S12), which is comparable to that of the reported MOFs for sensing 4-NP, 70 calculated from the equation 3σ/ k (σ, standard error; K SV , slope). 71 Thus, 5 can be considered as a potential candidate for the selective sensing of 4-NP molecules.…”
Section: Resultssupporting
“…The plot can be well‐fitted by the Stern–Volmer (S–V) equation ( I o / I = 1 + K sv [M]) in a low concentration range (Figure c). The quenching constant is 6.95 × 10 4 M –1 at low concentration, which can be compared with the previously reported fluorescence‐based MOF materials for detecting TNP, for example, {[Zn( μ ‐HCIP)( μ ‐pbix)]·2H 2 O} n (4.37 × 10 4 M –1 ), [Eu 2 (H 2 O)(DCPA) 3 ] n (1.07 × 10 4 M –1 ), [Zn 5 (DpImDC) 2 (DMF) 4 (H 2 O) 3 ]·H 2 O·DMF (1.0 × 10 5 M –1 ), CSMCRI‐1 (4.6 × 10 4 M –1 ), [Zn(L)] n (3.1 × 10 4 M –1 ) [Cd(L) 2 ]·(DMF) 0.92 (9.3 × 10 4 M –1 ), and Rh6G@1 (4.1 × 10 4 M –1 ) . The limit of detection (LOD) for TNP is also calculated using the following formula: LOD=3normalσ/K where σ is the standard deviation of initial fluorescence intensity of Zn‐TCPP/BPY and K is the slope of the aforementioned linear curve.…”
Section: Resultsmentioning
“…Metal–organic frameworks (MOFs) have attracted great attention owing to their potential applications in gas adsorption, separation, sensors, and catalysts. Structure-related properties of MOFs are easily modulated through rational selection of inorganic and organic moieties. Recently, luminescent MOFs have been extensively investigated as sensors for detection of organic solvents, ions, and biological moieties. For the probes from transitional-metal-ion (mainly d10 metal ions)-based MOFs, fluorescence mostly originates from organic linkers and the luminescence signals of such materials sometimes are not stable suffering from the nature of luminophores, coordination environments, and excitation wavelength. Comparatively, lanthanide-based MOFs (LnMOFs), due to the unique spectroscopic properties of lanthanide ions, including large Stokes’ shifts, high optical purity and quantum yields, narrow bands, and relatively long luminescence lifetimes, are ideal candidates for developing luminescent sensors. …”
Section: Introductionmentioning