化学
发光
硝基苯
镧系元素
乙腈
猝灭(荧光)
激发态
肉眼
量子产额
检出限
钛
光化学
星团(航天器)
分析化学(期刊)
物理化学
无机化学
有机化学
催化作用
荧光
原子物理学
物理
计算机科学
程序设计语言
量子力学
离子
光电子学
色谱法
作者
Hao Zheng,Yongkai Deng,Mingyu Ye,Qiaofei Xu,Xiang‐Jian Kong,Long Liu,Lan‐Sun Zheng
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2020-08-14
卷期号:59 (17): 12404-12409
被引量:41
标识
DOI:10.1021/acs.inorgchem.0c01494
摘要
A luminescent lanthanide-titanium oxo cluster of Eu2Ti4(μ2-O)2(μ3-O)4(phen)2(tbza)10·4CH3CN (1, Eu2Ti4-phen-tbza, phen = 1,10-phenanthroline, Htbza = 4-tert-butylbenzoic acid) was prepared through the reaction of phen, Htbza, Eu(Ac)3·xH2O, and Ti(OiPr)4 in acetonitrile. Its overall absolute quantum yield is 65.4% in solid state and 30.2% in CH2Cl2, and the detection limit of 1 for the nitrobenzene (NB) is 10.5 ppb. When the concentration of NB is 40 ppm, the luminescence quenching of 1 can be observed with the naked eye. Time-resolved excited-state decay measurements indicate that the static quenching process is dominated across the NB concentration of 0–9 ppm. The distinguishable shifts in 1H NMR spectra of NB together with 1 confirm the presence of π···π stacking interactions between the organic ligands in 1 and the NB, which plays a key contribution for the quenching of luminescence.
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