A Fluorescent Zinc-Based Coordination Polymer Constructed by 4,4'-(9,9-dimethyl-9H-fluorene-2,7-diyl)dipyridine with Sensitive Sensing Property for 2,4,6-Trinitrophenol
By introducing fluorene fragment on the dipyridine ligand,a zinc coordination polymer,{[Zn(tbip)(mfdp)]·2H2O} n(CP-1)(mfdp=4,4'-(9,9-dimethyl-9H-fluorene-2,7-diyl)dipyridine,H2 tbi=5-tert-butylisophthalic acid)has been synthesized under solvothermal conditions.X-ray diffraction studies showed that CP-1 crystallized in the triclinic space group P(1) with a=1.01384(5)nm,b=1.16486(6)nm,c=l.66569(7)nm,α=85.768(4)°,β=85.353(4)°,γ=73.544(4)°,V=1.87771(16)nm3,R1=0.0523 and wR2=0.1634(I＞2σ(l)).The structure of CP-1 shows a two dimensional network with holes occupied by lattice water molecules.Notably,CP-1 demonstrated strong luminescence in DMF solution,and fluorescence studies show that CP-1 could detect 2,4,6-trinitrophenol with high sensitivity by luminescent sensing.The KSV and detection limit values for TNP were calculated to be 6.27X 104 L·mol-1 and 0.108 μmol·L-1,respectively.
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