959-36-4Relevant articles and documents
Synthesis of tetradentate schiff base derivatives of transition bimetallic complexes as antimicrobial agents
Yousaf, Muhammad,Pervaiz, Muhammad,Sagir, Muhammad,Ashhar-Uz-Zaman,Mushtaq, Muhammad,Naz, Muhammad Yasin
, p. 1150 - 1155 (2013)
A series of Co(II), Cu(II), Mn(II) and Zn(II) bimetallic complexes have been synthesized with the schiff base ligand 2-(bis-2-hydroxyl phenylidene) diimine (L) derived from the condensation of hydrazine and salicylaldehyde. The synthesized ligand and bimetallic complexes were characterized by different spectroscopic techniques. The characterization of ligand was carried out by FT-IR, H1NMR, C13NMR andMS while the bimetallic complexes were characterized by FT-IR and X-ray crystallographic techniques. The complexes and ligand were employed in vitro for antifungal and antibacterial activities using disc diffusion method. Different fungal strains such as Alternaria Alternate, Aspergillus Flavus and Aspergillus Niger were used to check antifungal activities of bimetallic complexes and ligand. Similarly, the bacterial strains used were Staphylococcus Aureus, Bacillus Subbtilis and Escheria Coli. The biological studies showed that the ligand exhibited lower value of antifungal and antibacterial activities than bimetallic complexes.
Spectroscopic and photophysical properties of salicylaldehyde azine (SAA) as a photochromic Schiff base suitable for heterogeneous studies
Zió?ek, Marcin,Filipczak, Katarzyna,Maciejewski, Andrzej
, p. 181 - 186 (2008)
The photochromic cycle of the salicylaldehyde azine (SAA) has been investigated by means of the stationary and time-resolved UV-vis spectroscopy in a number of differently interacting solvents and micellar systems. The primary enol form of this Schiff base is much more energetically stabilized than in the other aromatic Schiff bases, which is reflected in remarkable resistance of SAA to the hydrolysis process. The fluorescence decay measured in highly viscous solvents as well as in micellar systems has proved the existence of different conformers of the cis-keto tautomer. Three different routes of the photochrome (trans-keto tautomer) decay have been also observed.
New salicylaldehyde azine esters: Structural, aggregation induced fluorescence, electrochemical and theoretical studies
Abdul Salam, Abdul Ajees,Kagatikar, Sneha,Kekuda, Dhananjaya,Kulkarni, Suresh D.,Sunil, Dhanya
, (2020)
The establishment of high-tech products relying on organic optoelectronics is focused towards latest strategies for improving the processability and performance. In the present study, two esters of salicylaldehyde azine SAE-F and SAE-NF were synthesized and their structural characterization were performed using FT-IR, 1H and 13C NMR, UV–visible spectroscopy, mass spectrometry and single crystal-XRD technique. The bathochromic shift observed in luminescence measurements from solution to aggregate/solid state, solvent based fluorescence studies, SEM and DLS measurements confirmed the fluorescence emission from the SAE-F aggregates. The DSC data indicated the phase transitions, and the TGA measurements confirmed the thermal stability of SAE-F to withstand temperatures up to 225 °C. The morphological characterization revealed formation of homogeneous pin-hole free uniform films of SAE[sbnd]F. Cyclic voltammetry was used to estimate the HOMO and LUMO energy levels which were found to be ?5.46 eV and ?3.05 eV respectively with a band gap of 2.41 eV. The p-type semi-conductivity of SAE-F was established using hot probe technique. The dielectric measurements were carried out to measure dielectric constant and ac conductivity at different frequency ranges. The electronic data obtained based on Density Functional Theory calculations were in conformity with the experimental results. Successful fabrication of a diode and the recorded current-voltage characteristics clearly advocated SAE-F to be an excellent candidate for electro-optical devices.
Simple and sensitive colorimetric sensors for the selective detection of Cu2+ in aqueous buffer
Huo, Jianzhong,Liu, Kai,Zhao, Xiaojun,Zhang, Xingxing,Wang, Ying
, p. 789 - 792 (2014)
Simple chromogenic sensor for the selective detection of Cu2+ was described. With the addition of Cu2+, a bathochromic shift about 82 nm was observed in the UV-VIS spectra, with the color change from colorless to bright yellow. This suggested that the coordination between receptor and Cu2+ was formed, and the strong push-pull system occurred. The followed IR spectra indicated that Cu2+ coordinated to the two phenolic oxygen atoms and one of two azomethines in the receptor.
Highly selective fluorescence turn-on determination of fluoride ions via chromogenic aggregation of a silyloxy-functionalized salicylaldehyde azine
Zhao, Yun-Hui,Li, Yubo,Long, Yunfei,Zhou, Zhihua,Tang, Zilong,Deng, Keqin,Zhang, Shaowei
, p. 1351 - 1355 (2017)
A novel fluorescent chemsensor TBS-protected salicylaldehyde azine (TSAA) for fluoride ion was developed based on aggregation-induced emission (AIE). The probe TSAA was prepared by the reaction of salicylaldehyde azine (SAA) with tert-butyldimethylsilyl chloride (TBS-Cl) via an unusual synthetic methodology and shows only non-emission. Upon treatment with fluoride in aqueous MeCN solution, the TBS protective group of probe TSAA was removed readily and the fluorescence of the probe was switched on, which resulted in a new fluorescence peak around 543?nm. The fluorescent intensity at 543?nm increases linearly with fluoride ion concentration in the range 1–50?μmol?L?1. This proposed probe shows excellent selectivity toward fluoride ion over other common anions and cations.
Fluorescence staining of salicylaldehyde azine, and applications in the determination of potassium tert-butoxide
Yang, Jinlai,Rui, Jian,Xu, Xu,Yang, Yiqin,Su, Jun,Xu, Haijun,Wang, Yunyun,Sun, Nan,Wang, Shifa
, p. 30636 - 30641 (2016)
Salicylaldehyde azine (1), with an aggregation-induced emission (AIE) function, was synthesized from salicylaldehyde and characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), high resolution mass spectrometry (HRMS), and X-ray single crystal diffraction. Compound 1 exhibited high thermal stability and good light-emitting behavior in the solid state. It could be preferably used to dye cellulose and KBr. No obvious changes in fluorescence intensity occurred when compound 1 was dissolved in different pH buffer solutions. The addition of TFA led to slight fluorescence quenching, and the fluorescence intensity gradually increased with increasing potassium tert-butoxide solution concentrations. The fluorescence intensity of compound 1 showed a good linear relationship with the concentration of potassium tert-butoxide (0.5–4.0 104 M), y ? 99.193x + 93.599, R2 ? 0.9902; the limit of detection (LOD) was 1.07 107 M. It could measure the content of potassium tert-butoxide with a relative standard deviation (RSD) value of 1.5%.
2,2'-Azinodimethyldiphenol, C14H12N2O2
Xu, Xue-Xiang,You, Xiao-Zeng,Sun, Zhen-Fan,Wang, Xin,Liu, Hai-Xin
, p. 1169 - 1171 (1994)
The X-ray single-crystal structure determination of the title compound reveals a trans planar structure in which the molecules stack in columns parallel to the c axis of the unit cell.Each molecule contains intramolecular O...N hydrogen bonds .
Cascade detection of fluoride and bisulphate ions by newly developed hydrazine functionalised Schiff bases
Roy, Suvojit,Paul, Provakar,Karar, Monaj,Joshi, Mayank,Paul, Suvendu,Choudhury, Angshuman Roy,Biswas, Bhaskar
, (2021/02/02)
Two hydrazine functionalized Schiff bases have been synthesized through the reaction between hydrazine and o-vanillin/salicylaldehyde compounds employing a green-chemical approach and characterized spectroscopically including XRD study. Crystal structure analysis reveals that both the chemosensors, N,N′-bis(o-vanilidine)hydrazine (P17) and N,N′-bis(salicylidene)hydrazine, (HARB) crystallize in monoclinic system with P21/n space group and exist in the locked forms through intramolecular H-bonding (~1.90 ?) between phenolic-OH and N atom of hydrazine. The chemosensors display excellent selectivity towards fluoride followed by bisulphate ions, over other potential competitor anions in acetonitrile. Binding stoichiometry of the individual chemosensor with F? is confirmed to be 1:1 and assessed with absorption study and 1H NMR analysis. Systematic DFT analysis reveals that the contribution of hydroxyl oxygen atoms to the HOMO increases sharply from the chemosensor to chemosensor–F? adduct (17% to 28%) leading to deprotonation of one hydroxyl group and consequently involvement in conjugation impeding the C=N isomerisation. Thus, the hydroxyl proton captured by F? restricts the C=N isomerisation as well as ICT character of both the chemosensors and confirms the cascade sensing mechanism for fluoride and bisulphate ions.
Salicylazine activated plasmonic silver nanoprisms for identification of Fe(ii) and Fe(iii) from aqueous solutions
Kumar, Abhay,Singh, Anurag Kumar,Singh, Deovrat,Singh, Raksha,Upadhyay, K. K.,Yadav, Minu
supporting information, p. 17782 - 17786 (2021/10/12)
Herein, we report the synthesis and characterization, along with the successful application, of silver nanoprisms for the identification of Fe(ii)/Fe(iii) at the nanomolar level. A few real samples have also been analyzed successfully. The scanning electron microscopy (SEM)-transmission electron microscopy (TEM) imaging of the sensing events indicate analyte induced changes in the morphology and geometrical pattern of the silver nanoparticles.
