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2维Zn-LCP纳米材料荧光感应Cr2O72-和L-胱氨酸的研究
The Study of Fluorescence-Sensing Cr2O72-and Amino Acid by 2D Zn-LCP Nanomaterial
【摘要】 该文利用柔性间苯二乙酸(H2mpda)和刚性共轭体均苯三咪唑(tib)水热合成发光配位聚合物[Zn3(tib)2(mpda)3]n·5H2O (Zn-LCP).mpda2-的2个羧基均与金属Zn(Ⅱ)单齿配位形成1维波浪链,tib作为三节点与金属Zn(Ⅱ)配位形成1维带状链,2个链通过Zn(Ⅱ)交接构成2维面,面与面通过π-π作用力堆积形成3维超分子体.Zn-LCP比表面积(BET)为19 m2·g-1,量子产率为25.22%.Zn-LCP具有较好的荧光性能,对在水中的Cr2O72-离子和L-胱氨酸感应良好,检出限分别为0.34μm-1和3.6 nmol·L-1,荧光猝灭率分别为68.3%和98.3%,高于文献报道值.其荧光猝灭机理是共振能量转移和竞争吸收.
【Abstract】 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),throughπ-πforce accumulates to form a 3D supramolecular structure.The surface area (BET) is 19 m2·g-1,the quantum yield is 25.22%.Zn-LCP has good fluorescence performance,good induction of Cr2O72-and L-cystine in water,detection limit (LOD) is 0.34μm-1and3.6 nmol·L-1respectively,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 energy transfer (RET) with competitive absorption(CA).
【Key words】 coordination polymer; hydro-thermal synthesis; crystal structure; thermal stability; fluorescence property; dye; quenching mechanism;
- 【文献出处】 江西师范大学学报(自然科学版) ,Journal of Jiangxi Normal University(Natural Science Edition) , 编辑部邮箱 ,2024年02期
- 【分类号】O641.4;O657.3;X832
- 【下载频次】5