Two efficient pH sensors based on heteronuclear metal-organic frameworks

被引：24
|
作者：
Li, Meiling [1 ]
Yang, Weiting [1 ]
Qiu, Pengfei [1 ]
Ren, Guojian [1 ,2 ]
Li, Chengyang [1 ]
Chen, Ziyu [1 ]
Wang, Yinghui [3 ]
Pan, Qinhe [1 ]
机构：
[1] Hainan Univ, Coll Mat & Chem Engn, Key Lab Adv Mat Trop Isl Resources, Minist Educ, Haikou 570228, Hainan, Peoples R China
[2] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2019年 / 205卷
基金：
中国国家自然科学基金;
关键词：
MOFs; Metal clusters; Solvent effect; pH sensors; FLUORESCENCE; LUMINESCENT; MOF; ADSORPTION; CLUSTERS; 1D; 3D;
D O I：
10.1016/j.jlumin.2018.09.056
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Two heteronuclear clusters-based MOFs, CoLi(HL)center dot 4DMA (HNU-23) and CoLi2(L)(DMF)2 center dot DMF center dot H2O (HNU-24) (H4L = 5- [bis(4-carboxybenzyl) amino] isophthalic acid) were successfully synthesized through a solvent-directed strategy. The luminescence sensing property investigations reveal that HNU-23 and HNU-24 exhibit turnon luminescence towards the H+ concentration under strong acidic condition, and could be served as potential pH sensors. HNU-23 shows high linear H+ concentration response in the range of 0.02-0.2 M; HNU-24 exhibits similar linear response towards the H+ concentration from 0.1 to 0.2 M. The mechanism of this sensing behavior can be explained through disruption of the HNU-23 and HNU-24 structures under acidic condition to gradually release the fluorophore.
引用
收藏
页码：380 / 384
页数：5
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