色胺
光化学
部分
化学
脱质子化
荧光
发色团
激发态
分子内力
密度泛函理论
氢键
离子
立体化学
分子
计算化学
有机化学
核物理学
物理
量子力学
生物化学
作者
Karuppiah Krishnaveni,Malini Nelson,Mohammed Mujahid Alam,Manickam Selvaraj,S. Murugesan,Ayyanar Siva
标识
DOI:10.1016/j.saa.2021.120777
摘要
A novel indole hydrazone tagged moiety, 2-((5-bromo-1H-indol-2-yl) methylene) hydrazono) methyl)-4, 6-diiodophenol (BHDL) has been developed for the selective and sensitive detection of biogenic tryptamine and F- ions. The binding dexterity of probe BHDL towards F-/tryptamine (TryptA) has been investigated by UV-visible/fluorescence spectroscopy. In the presence of TryptA, probe exhibits strong enhancement in the emission band at 433 nm and the band at 555 nm underwent a blue shift accompanied by a decrease in intensity by the inhibition of Excited State Intramolecular Proton Transfer (ESIPT) on BHDL. Excitingly, complexation with F- ions as well triggers an enhancement in a fluorescence band at 430 nm with the concomitant disappearance of the emission band at 555 nm due to the inhibition of ESIPT and deprotonation process initiated by the hydrogen bonding complex formation. Further, Density Functional Theoretical (DFT) calculations have been performed to support the mechanism functioned on the probe BHDL in the presence of TryptA/F-.
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