Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, ChemistrySelect called Deciphering of Ligand-to-Metal Charge-Transfer Process: Synthesis, Spectroscopic and Theoretical Study, Author is Ghosh, Swadesh; Singharoy, Dipti; Naskar, Jnan Prakash; Bhattacharya, Subhash Chandra, which mentions a compound: 3326-71-4, SMILESS is O=C(C1=CC=CO1)NN, Molecular C5H6N2O2, Formula: C5H6N2O2.
Many reports on metal ion sensing applications are available in literature but the mechanism of selectivity is not clear. Here the synthesis and characterization of a Schiff base Furan-2-carboxylic acid pyren-1-ylmethylene-hydrazide (PYFH) has been described with selective detection of copper(II) metal ion among different metal ions by UV-vis, fluorescence and HRMS spectroscopic methods. The S2- ion (Na2S) was added to the PYFH:Cu2+ complex for checking reversibility of PYFH by fluorescence, fluorescence microscopic imaging and mol. logic gate construction (combination of NOT and OR gate). From the exptl. findings the reason for selectivity of Cu2+ metal ion among a series of metal ions is not clear. So, to explore the causes of selectivity of Cu2+ metal ion by PYFH, D. Functional Theory (DFT) calculation was conducted for free PYFH and various sets of metal ions individually with PYFH. From DFT calculation it was understandable that selectivity of PYFH towards Cu2+ ions occurred due to lowering of HOMO-LUMO energy of PYFH:Cu2+ composites (-8.46 & -5.80 eV) compared to free PYFH (-5.56 & -2.15 eV). Whereas energy of HOMO and LUMO with other metals ions (PYFH:Mn+) are ∼-5.50 and ∼-2.24 eV resp., as a result PYFH does not get any extra stability.
Compounds in my other articles are similar to this one(2-Furoic hydrazide)Formula: C5H6N2O2, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics