Synthesis, 2D NMR and X-ray diffraction studies on Cu(II) and Ni(II) complexes with ligands derived from azobenzene-cored Schiff base: Mesomorphic behaviors of Cu(II)–phenolates and crystal structure of bis[4-(4-alkoxy-2-hydroxybenzylideneamino)azobenzene]copper(II)

Yeap, Guan‐Yeow; Heng, Boon-Teck; Kakeya, Masaki; Takeuchi, Daisuke; Górecka, Ewa; Ito, Masato

doi:10.1016/j.molstruc.2011.05.036

Cited by 12 publications

(12 citation statements)

References 33 publications

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“…This shift indicates the coordination of the ligand to the metal ion. [29,31] The new bands appeared at 534-516 and 445-423 cm −1 region in the complexes were assigned to ν(M-N) and ν(M-O) respectively, which further confirms the coordination of the ligands to the metal ions. [32] …”

Section: In Vitro Cytotoxic Activitymentioning

confidence: 55%

Binuclear Cu(II) Schiff base complexes as prescursors for the synthesis of CuO nanoparticles: anticancer activity against MCF-7 cell line

Moorthy

Rajavel

2016

Smart Science

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Homobinuclear Cu(II) complexes 1 and 2 were synthesized and characterized by elemental analysis, FTIR, 1 H NMR, Mass, UV-vis, magnetic moment, ESR and TGA studies. The synthesized complexes 1 and 2 were used as precursors for the synthesis of CuO Nps by calcination method. CuO Nps were characterized by FTIR, XRD, scanning electron microscopy (SEM), and EDX. XRD peaks clearly indicated the monoclinic structure of CuO. CuO nanoparticles were synthesized with average particle size 3-4 and 5-10 nm. The morphologies and size of the obtained products were further investigated by SEM. Presence of essential constituents of CuO Nps was investigated by EDX studies. The Anticancer activity of the precusors 1&2 and its nanoparticles have been analyzed against the MCF-7 cell line by MTT assay. The Precusor 1 with IC 50 value 12.66 μM was found to have high anticancer activity than other compounds. Synopsis:• Binuclear Cu(II) Schiff base complexes 1 & 2 were synthesized from the ligands L1 and L2, respectively. • Binuclear Cu(II) complexes were successfully used as a precursor for the synthesis of CuO Nps. • The ligands, precusors, and the CuO Nps were analyzed for their anticancer activity against the MCF-7 cell line. • Precursor 1 synthesized from the ligand L1 shows high activity than other compounds due to the presence of the heterocyclic moiety.CONTACT rajavel rangappan drrajavel@periyaruniversity.ac.in Downloaded by [McMaster University] at 23:21 23 June 2016 2 M. MOORTHy AND R. RANGAPPANBased on the above facts, herein we have reported the synthesis of CuO nanoparticles from the binuclear Schiff base copper complexes by calcination method and their characterization by various physicochemical methods. The precursors and its nanoparticles were analyzed for their anticancer activity against the MCF-7 cell line by MTT assay. Materials and methodsAll chemicals were of analytical reagent grade and were used as received. The elemental analysis was performed on Carlo-Erba 1106 model instrument at CDRI, Lucknow. The molar conductivity measurements were carried out using an Elico-CM Conductivity Bridge with 10 −3 M DMSO as solvent. FTIR spectra were recorded as KBr pellet using a Thermo Nicolet, Avatar 370 model FT-IR spectrophotometer ranging between 4000-400 cm −1 . Electronic absorption spectra were recorded on a Perkin Elmer Lambda 25 UV-vis spectrometer between 200-800 nm using DMSO solvent. The magnetic properties of the complexes were studied via a Gouy balance. 1 HNMR spectra for the ligand were recorded on a Bruker Avance III, 400-MHz NMR spectrometer using DMSO-d 6 solvent and TMS as internal standard. The EPR spectrum was recorded on a Bruker spectrometer operating in the X-band and using 100-kHz magnetic field modulation. The thermogravimetric analysis of the complexes were recorded on a Perkin Elmer STA 6000 thermal analysis system within the temperature range 40-740 °C. The SEM/EDS micrographs were recorded on a JEOL Model JSM -6390LV microscope. 2.

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Section: In Vitro Cytotoxic Activitymentioning

confidence: 55%

Binuclear Cu(II) Schiff base complexes as prescursors for the synthesis of CuO nanoparticles: anticancer activity against MCF-7 cell line

Moorthy

Rajavel

2016

Smart Science

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“…Furthermore, the absence of the O-H band of free ligands in the Cu(II) metal complexes also confirmed the formation of new Cu-O bond [1][2][3][4][5][6][7][8].…”

Section: Characterizationmentioning

confidence: 74%

“…The IR spectra showed that the C=N stretching frequency is shifted to a lower region by 14-15 cm -1 in Cu(II) complexes 5 as compared to uncoordinated ligand 4. The observation can be due to the coordination of N atom to the Cu(II) metal ion leading to the reduction in the C=N bond order [1][2][3][4][5][6][7][8]. Besides, the stretching frequency of phenolic C-O is shifted upon complexation in which the values change from 1291-1292 cm -1 to 1266-1267 cm -1 for fluoro substituent, 1320 cm -1 to 1307-1308 cm -1 for chloro and bromo substituents, 1291 cm -1 to 1267 cm -1 for iodo and unsubstituted ligands.…”

Section: Characterizationmentioning

confidence: 99%

Alkyl chain self ordering, induction and suppression of mesophase by Cu(II) containing [1,2,3]-triazole-based bidentate salicylaldimine ligands: synthesis, characterisation and X-ray diffraction studies

et al. 2014

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“…In 2011, two ligands containing Cu and Ni atoms were synthesized by Yeap et al (2011), namely compounds 15 (a–e) and 16 (a–e) [ 30 ]. All compound 15 first exhibits a schlieren textured nematic phase followed by a focal conic fan shape textured typically for smectic A.…”

Section: Structure–property Relationshipmentioning

confidence: 99%

“…Yeap et al (2011) also focused on the study of a structure–property relationship of compound 17 , which was synthesized by Reddy et al (1991) [ 30 , 31 ]. Compound 17 exhibit a smectic A phase and is thermodynamically enantiotropic up to the clearing temperature of 33.0–261.0 °C.…”

Section: Structure–property Relationshipmentioning

confidence: 99%

Liquid Crystals Investigation Behavior on Azo-Based Compounds: A Review

Razali

Jamain

2021

Polymers

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Liquid crystal is an intermediate phase between the crystalline solid and an isotropic liquid, a very common substance in our daily lives. Two major classes of liquid crystal are lyotropic, where a liquid crystal is dissolved in a specific solvent under a particular concentration and thermotropic, which can be observed under temperature difference. This review aims to understand how a structure of a certain azo compound might influence the liquid crystal properties. A few factors influence the formation of different liquid crystals: the length of the alkyl terminal chain, inter/intra-molecular interaction, presence of spacer, spacer length, polarization effects, odd-even effects, and the presence of an electron-withdrawing group or an electron-donating group. As final observations, we show the compound’s different factors, the other liquid crystal is exhibited, and the structure–property relationship is explained. Liquid crystal technology is an ideal system to be applied to products to maximize their use, especially in the electronic and medical areas.

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Synthesis, 2D NMR and X-ray diffraction studies on Cu(II) and Ni(II) complexes with ligands derived from azobenzene-cored Schiff base: Mesomorphic behaviors of Cu(II)–phenolates and crystal structure of bis[4-(4-alkoxy-2-hydroxybenzylideneamino)azobenzene]copper(II)

Cited by 12 publications

References 33 publications

Binuclear Cu(II) Schiff base complexes as prescursors for the synthesis of CuO nanoparticles: anticancer activity against MCF-7 cell line

Binuclear Cu(II) Schiff base complexes as prescursors for the synthesis of CuO nanoparticles: anticancer activity against MCF-7 cell line

Alkyl chain self ordering, induction and suppression of mesophase by Cu(II) containing [1,2,3]-triazole-based bidentate salicylaldimine ligands: synthesis, characterisation and X-ray diffraction studies

Liquid Crystals Investigation Behavior on Azo-Based Compounds: A Review

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