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RISS 인기검색어
- 검색키워드
- 저자 : Yonghai Song (검색결과 3 건)
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Linli Hou,Yonghai Song,Fengxiang Lang,Zhenrong Wang,Li Wang 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.90 No.-
A luminescent Tb3+-pyromellitic acid (H4L = pyromellitic acid) coordination polymer (Tb-H4L CP, TbL0.5(H2L)0.5(H2O)DMF) was prepared for multiresponsive fluorescence sensor. The Tb-H4L CP exhibits uniform nanospheres with average diameter of 220 20 nm, good crystalline structure, and good dispersion in water. The Tb-H4L CP emitted the characteristic green fluorescence through antenna effect from H4L which was an excellent antenna molecule when excited at 270 nm and could be used to selectively determine Fe3+ and polychlorinated benzenes based on fluorescence quenching effect. The coordination between Fe3+ and carboxylic oxygen of Tb-H4L to damage the antenna effect and polychlorinated benzenes absorb the excitation light to result the inner-filter effect of fluorescence, which quenched the fluorescence of Tb-H4L CP. The linear range for Fe3+ was 2.0–100mM with a detection limit of 0.7mM and for 1,3,5-trichlorobenzene was 0–0.44 103 ppm with a detection limit of 0.087 ppm. The Tb-H4L CP demonstrates excellent fluorescence sensing performances, indicating that it can be used as a multi-response sensor to effectively measure toxic and harmful substances.
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Linyu Wang,Yonghai Song,Ying Luo,Li Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
It is urgent to control serious drug pollution and heavy metal ion pollution. Covalent organic framework(COF) is becoming a promising material for the removal of heavy metal ion and adsorption of organicsmall molecule because of the designed functional sites, ordered pore channel, high specific surface areaand abundant p electrons. Herein, 2,4,6-triformylphloroglucinol (TFP) and benzene-1,3,5-tricarbohydrazide (BTH) was used to design a stable yet efficient beta-ketoenamine COF (COFTFP-BTH)adsorbent, which would provide multiple adsorption sites of Hg2+ by dense acylhydrazine. The maximumadsorption capacity of COFTFP-BTH toward Hg2+ achieved 909 mg g1, coinciding with Langmuir adsorptionand pseudo-second-order adsorption kinetic model, with the h value as high as 71.43 mg g1 min1. COFTFP-BTH was also grown on NH2-carbon nanotubes (CNT) to form a novel COFTFP-BTH@NH2-CNT compositefor sensitive detection of nitrofural (NF). The NF sensor based on COFTFP-BTH@NH2-CNT showed alow detection limit (3.2 nM) and a wide linear range (9.6 nM-100 lM). The excellent performances werealso attributed to the ordered channels of COFTFP-BTH exposing more adsorption sites of Hg2+ and NF, aswell as the good stability of beta-ketoenamine COFTFP-BTH.
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Lijuan Kuang,Yue Du,Shiqi Wang,Li Yang,Yonghai Song 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
As one of the specific biomarkers of anthrax, timely, sensitive and accurate detection of 2,6-dipicolinicacid (DPA) plays an important role in preventing biological weapons attacks and disease outbreaks. Here, multiemission Eu3+/covalent- organic framework (COFDTA-TFP) and Tb3+/COFDTA-TFP were constructedby the coordination between Eu3+ or Tb3+ with fluorescent COFDTA-TFP which was prepared byamine-aldehyde dehydration condensation between 2,5-diaminoterephthalic acid and 2,4,6-triformylphloroglucinol for the first time. The Eu3+/COFDTA-TFP and Tb3+/COFDTA-TFP can emit nonoverlappingfluorescence of COFDTA-TFP and Eu3+ or Tb3+, which was used to ratiometric detection ofDPA. Due to the strong coordination between the nitrogen atoms in the pyridine ring and the oxygenatoms in the carboxyl group of DPA with Eu3+ or Tb3+, DPA replaced coordinated H2O to sensitize fluorescenceof Eu3+ or Tb3+ by ‘‘antenna” effect but fluorescence of COFDTA-TFP with two-dimensional lamellarstructure was kept constant as a reference. The linear range and detection limit of ratiometric fluorescencesensor based on Eu3+/COFDTA-TFP for detection of DPA are 0.01–12 mM and 4.2 nM, respectively. The linear range and detection limit of ratiometric fluorescence sensor based on Tb3+/COFDTA-TFP fordetection of DPA are 0.01–9.0 mM and 2.9 nM, respectively.
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