Photoacoustic spectrum of a new, 12-fold-coordinated Ho(III) hydrazone complex

Guskos, N.; Typek, J.; Majszczyk, J.; Maryniak, M.; Paschalidis, Damianos G.

doi:10.1016/j.jnoncrysol.2008.06.057

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…The energy difference of these photons is employed in many thermal processes occurring in organisms. These processes excited by d-d transitions can play very important role and serve as a sort of 'channel selector' [12,13]. It is interesting to notice that a similar PA signal could be found for the other sea organisms such as Trunculariopis Trunculus or Sea Urchin [3,4].…”

Section: Introductionmentioning

confidence: 81%

Photoacoustic response of a common starfish tissue

Guskos¹,

Majszczyk²,

Typek³

et al. 2013

Ukr. J. Phys. Opt.

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Abstract.A sample of common starfish (Asterias Rubens) tissue has been prepared in the shape of a film to study its photoacoustic (PA) response. A broad absorption band in the PA spectrum is detected in the visible region (a peak at about 570 nm), while the ultraviolet region is distinguished by the absorption bands originating from π → π* and π → n charge transfer transitions. The visible PA spectrum strongly depends on decomposition of sample in the open air. The PA spectrum measured by us is very similar to those obtained earlier for the other living organisms, e.g. Trunculariopis Trunculus and Sea Urchin. The absorption band near 570 nm is similar to that found for spermidine, which is of importance in the information transfer to DNA. The results obtained in this work confirm experimentally that geologically very old organisms have been absorbing especially intensely in that part of solar spectrum for which the water is transparent.

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Section: Introductionmentioning

confidence: 81%

Photoacoustic response of a common starfish tissue

Guskos¹,

Majszczyk²,

Typek³

et al. 2013

Ukr. J. Phys. Opt.

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“…Emerging reports of complexes containing carbonyl group exist which are in agreement with this assertion. 22,25,26 The C=C stretch appeared within 1589-1490 cm -1 for the compounds whereas C=N stretching bands appeared within 1622-1558 cm -1 . The C-N stretch appeared within 1589-1490 cm -1 for the ligand and its complexes.…”

Section: Infrared Spectral Data Of 5-((2-phenylacetoxy) Carbonyl)-1h-...mentioning

confidence: 91%

Synthesis, Characterization, Antimicrobial and Antimalarial Activities of 5-((2- phenylacetoxy) carbonyl)-1H-pyrazole-3-carboxylic Acid and its Ce(III), Pr(III) and Nd(III) Complexes

2023

TJNPR

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In the current study, we report new 3,5-disubtitutedpyrazole derivativeswhich are nitrogen and oxygen containing compounds with antiplasmodial activity. Evidence from existing literature shows potential antiplasmodial activity of new compounds containing nitrogen and sulphur. 10 The compounds were synthesized and evaluated for their antiplasmodial activity. They were also screened for their in vitro antimalarial activity against chloroquine-resistant strain of P.falciparum. The compounds shows more potentactivity thanpositivecontroland exhibited reasonable in silico drug-likeness and pharmacokinetic properties. 12 Materials and Methods ReagentsAll reagents used were of analytical grade, only few were of reagent grade and they were all used without further purification.Phenylacetylchloride (98%), 3,5pyrazoledicarboxylic acid mono hydrate (97%), and the metal salts were products of Sigma Aldrich.Other reagents like chloroform (98%), ethanol (98%), and tetrahydro furan (THF) were obtained from Fluka. General Procedure for the Synthesis of 5-((2phenylacetoxy) carbonyl)-1H-pyrazole-3-carboxylic acid The ligand, 5-((2-phenylacetoxy) carbonyl)-1H-pyrazole-3-carboxylic acid was prepared by adopting methods reported in literature. 13,14 To equal mixture of chloroform and ethanol (50 mL), 2.612 g (5 mmol) of 3,5-Pyrazole dicarboxylic acid was added followed by 2.0 mL of phenylacetyl chloride under reflux for 2 h. The solution was left to stand for 2 weeks. A white crystal was obtained by filtration (Scheme 1). Synthesis of the ComplexesThe Ce(III), Pr(III) and Nd(III) complexes of the ligand were prepared according to the method described by Heinosuke (1967). 15 Generally, the ligand was reacted separately with the metal salts using mole ratio 2:1 under reflux for 2 h and the products formed were filtered and stored in the desiccator for further use.

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“…Similar assertions have been made for complexes containing carbonyl group. 19,20 The absorptions between 1496-1640 cm -1 are due to C=C stretch of the aromatic ring. Characteristic aromatic compounds show absorption for C=C stretch in this region.…”

Section: Interpretation Of Uv Spectramentioning

confidence: 99%

Synthesis, Characterization and Biological Potentials of 1-phenylacetyl-pyrrolidine-2-Carboxyaldehyde and its Lanthanoid Complexes

2024

TJNPR

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Photoacoustic spectrum of a new, 12-fold-coordinated Ho(III) hydrazone complex

Cited by 5 publications

References 18 publications

Photoacoustic response of a common starfish tissue

Photoacoustic response of a common starfish tissue

Synthesis, Characterization, Antimicrobial and Antimalarial Activities of 5-((2- phenylacetoxy) carbonyl)-1H-pyrazole-3-carboxylic Acid and its Ce(III), Pr(III) and Nd(III) Complexes

Synthesis, Characterization and Biological Potentials of 1-phenylacetyl-pyrrolidine-2-Carboxyaldehyde and its Lanthanoid Complexes

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