Journal
ACS OMEGA
Volume 5, Issue 29, Pages 18411-18423Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.0c02226
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Funding
- Science & Engineering Research Board (SERB), Govt. of India [PDF/2016/000334]
- U.G.C. (Government of India) [F.4-2/2006 (BSR)/CH/17-18/0236]
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The synthesized Schiff base ligand 3-hydroxy-N'-(2-hydroxy-3-methoxybenzylidene)-2-naphthohydrazide (H2NPV) is structurally characterized by single-crystal X-ray diffraction (XRD) and exhibits weak fluorescence in the excited state owing to the effect of excited-state-induced proton transfer (ESIPT). However, in the presence of AI(3+), the ESIPT is blocked and chelation-enhanced fluorescence (CHEF) is induced because of complexation with the cations, resulting in turn-on emission for Al3+. The probe H2NPV selectively detects Al among the various metal ions, and the detection limit is found to be 1.70 mu M. The composition and modes of complex coordination were determined by spectroscopic, theoretical studies and molecular logic gate applications. Finally, DNA binding studies were performed by spectroscopic and calorimetric methods to elucidate possible bioactivity of H2NPV.
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