Rational design of fluorescent probe for Hg2+ by changing the chemical bond type

Cui Tengli; Yu Shengzhen; Chen Zejing; Liao Rui; Zhang Xinglin; Zhao Qiang; Sun Huibin; Huang Wei

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Rational design of fluorescent probe for Hg2+ by changing the chemical bond type

机译：改变化学键型HG2 +荧光探针的合理设计

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Two kinds of fluorescent probes DFBT and DFABT, and their corresponding water-soluble compounds WDFBT and WDFABT, based on the trimers containing a benzo[2,1,3] thiadiazole moiety and two fluorene moieties are synthesized. Their luminescent behavior towards Hg2+ ions and other various metal ions in organic and water solutions are studied in detail via absorption and emission spectroscopy. All these probes show a selective "on-off-type" fluorescent response to Hg2+ ions in solution over other metal ions with a maximum detection limit of 10(-7) M. Importantly, the probe type can be changed from irreversible to reversible by altering the bridge mode between the functional units from C equivalent to C triple bond to C-C single bond. Their detection mechanisms towards Hg2+ are studied in detail via mass spectrometry and Job plots, which are attributed to irreversible chemical reaction for DFABT and WDFABT and a reversible coordination reaction for DFBT and WDFBT respectively. Our research results about this kind of organic fluorescent probe provide valuable information to the future design of practical Hg2+ fluorescent probes.

机译：合成了两种荧光探针DFBT和DFABT，及其基于含有苯并[2,1,3]噻二唑部分和两个芴部分的三聚物的相应水溶性化合物WDFBT和WDFABT。通过吸收和发射光谱详细研究了它们在有机和水溶液中的HG2 +离子和其他各种金属离子的发光行为。所有这些探针都显示出对HG2 +离子的选择性的“ON-OFF型”荧光响应，其在其他金属离子上，最大检测限为10（-7）M.重要的是，探针类型可以从不可逆转地改变到可逆从C的功能单元之间改变与C三键的功能单元之间的桥接模式与CC单键相等。通过质谱和作业地图详细研究了朝向HG2 +的检测机制，其归因于DFABT和WDFABT的不可逆化学反应和用于DFBT和WDFBT的可逆配位反应。我们关于这种有机荧光探针的研究结果为未来的实际HG2 +荧光探针设计提供了有价值的信息。

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来源
《RSC Advances》 |2018年第22期|共6页
作者
Cui Tengli; Yu Shengzhen; Chen Zejing; Liao Rui; Zhang Xinglin; Zhao Qiang; Sun Huibin; Huang Wei;
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Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

Nanjing Univ Posts &

Telecommun SICAM Key Lab Organ Elect &

Informat Displays 9 Wenyuan Rd Nanjing 210023 Jiangsu Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

Nanjing Univ Posts &

Telecommun SICAM Key Lab Organ Elect &

Informat Displays 9 Wenyuan Rd Nanjing 210023 Jiangsu Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

Nanjing Tech Univ NanjingTech Jiangsu Natl Synergist Innovat Ctr Adv Mat SICAM China Key Lab Flexible Elect KLOFE 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

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2. Rational design of fluorescent probe for Hg2+ by changing the chemical bond type [J] . Cui Tengli, Yu Shengzhen, Chen Zejing, RSC Advances . 2018,第22期

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Rational design of fluorescent probe for Hg2+ by changing the chemical bond type

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