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Detection of sulfide ion and gaseous H2S using a series of pyridine-2,6-dicarboxamide based scaffolds†
Dalton Transactions ( IF 4 ) Pub Date : 2018-06-20 00:00:00 , DOI: 10.1039/c8dt01351a
Pramod Kumar 1, 2, 3, 4 , Vijay Kumar 1, 2, 3, 4 , Saurabh Pandey 1, 2, 3, 4 , Rajeev Gupta 1, 2, 3, 4
Affiliation  

Pyridine-2,6-dicarboxamide based scaffolds with different appendages act as chemosensors for the selective detection of S2− ion, as well as gaseous H2S, in primarily aqueous media. Out of nine synthesized chemosensors, one with benzothiazole ring appendages was found to be highly selective for S2− ion and gaseous H2S. A series of spectroscopic studies confirmed that sulfide ion abstracts amidic N–H groups thus leading to the in situ generation of HS ion, which remain bound to the pincer cavity of the resultant anionic chemosensor, and it was found that acetic acid could be used to reverse this process. It was essential for a chemosensor to feature a pincer cavity to recognize sulfide ion, whereas the sensing mechanism involved the deprotonation of the amidic N–H groups. We also illustrate the detection of sulfide ions and gaseous H2S in live cells and paper-strip sensing applications.

中文翻译:

使用一系列基于2,6-吡啶二甲酰胺的支架 检测硫化物离子和气态H 2 S

用不同的附肢的基于吡啶-2,6-二甲酰胺支架充当化学传感器对于S的选择性检测2-离子,以及气态ħ 2 S,在主要含水介质。在九个合成化学传感器中,一个带有苯并噻唑环附件的化学传感器被发现对S 2−离子和气态H 2 S具有高度选择性。一系列光谱研究证实,硫化物离子会夺取酰胺化的N–H基团,从而导致原位生成HS的-离子仍然保留在所得阴离子化学传感器的钳形腔中,并且发现可以使用乙酸来逆转该过程。化学传感器必须具有钳形腔以识别硫化物离子,而传感机制涉及酰胺化的N–H基团的去质子化,这一点至关重要。我们还将说明在活细胞和纸条传感应用中对硫化物离子和气态H 2 S的检测。
更新日期:2018-06-20
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