The Study of Fluorescence-Sensing Cr2O72-and Amino Acid by 2D Zn-LCP Nanomaterial
Flexible interphenyldiacetic acid(H2pda)and rigid conjugate isobenzene triimidazole(tib)are used to synthesize the luminescent coordination polymer[Zn3(tib)2(mpda)3]n·5H2O(Zn-LCP).Both carboxylic groups of mpda2-coordinate with Zn(Ⅱ)to form a 1D wave chain,tib as three nodes coordinate with Zn(Ⅱ)to form a 1D ribbon chain,the two chains form 2D surfaces through Zn(Ⅱ),through π-π force accumulates to form a 3D supra-molecular structure.The surface area(BET)is 19 m2·g-1,the quantum yield is 25.22％.Zn-LCP has good fluo-rescence performance,good induction of Cr2O2-and L-cystine in water,detection limit(LOD)is 0.34 μm-1 and 3.6 nmol·L-1 respectively,and fluorescence quenching rate is 68.3％and 98.3％respectively,which is hi-gher than that reported in the literature.The fluorescence quenching mechanism of Zn-LCP is caused by resonance ener-gy transfer(RET)with competitive absorption(CA).
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