Photophysicochemical behaviour and antimicrobial properties of monocarboxy Mg (II) and Al (III) phthalocyanine-magnetite conjugates

Idowu, Mopelola Abidemi; Xego, Solami; Arslanoğlu, Yasin; Mark, John; Antunes, Edith; Nyokong, Tebello

doi:10.1016/j.saa.2017.12.052

Cited by 25 publications

(4 citation statements)

References 45 publications

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“…The reduction in the bacteria is given on a logarithmic scale and as cell viability percentage values, calculated according to the reported literature procedures (Fig. 6, Table 5) (43). Dark toxicity studies showed that 1 – 4 had no significant dark toxicity even at relatively high concentrations (Fig.…”

Section: Resultsmentioning

confidence: 99%

Diiodinated Mono‐ and Dipyridylvinyl BODIPY Dyes: Photophysicochemical Properties, in vitro Antibacterial Studies, Molecular Docking and Theoretical Calculations

Şen

Sindelo

Nnaji

et al. 2022

Photochem & Photobiology

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In this study, novel mono-and dipyridylvinyl boron dipyrromethene dyes are prepared to compare their photodynamic antimicrobial chemotherapy (PACT) activities against Staphylococcus aureus to the corresponding core dyes. Pyridylvinyl substitution at the 3-or 3,5-positions of a meso-4-bromophenylBODIPY core dye via a Knoevenagel reaction with an aromatic 2-bromopyridinecarboxaldehyde shifts the major BODIPY spectral band to longer wavelength. The extended π-conjugation red shifts the main spectral band into the 602-618 nm region in CHCl 3 , THF, ethanol and DMSO after monopyridylvinyl substitution and to 685-704 nm after dipyridylvinyl substitution. An enhancement of the population of the T 1 state through the incorporation of iodine atoms at the 2,6-positions results in moderately high singlet oxygen quantum yields in DMSO. The π-extended dyes were found to have significantly lower PACT activities than the diiodinated core dye.

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Section: Resultsmentioning

confidence: 99%

Diiodinated Mono‐ and Dipyridylvinyl BODIPY Dyes: Photophysicochemical Properties, in vitro Antibacterial Studies, Molecular Docking and Theoretical Calculations

Şen

Sindelo

Nnaji

et al. 2022

Photochem & Photobiology

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“…Log reductions were calculated by using Equation () to determine the reduction of viable microorganisms using a logarithmic scale [ 33 ]

\begin{matrix} \log r e d u c t i o n = \log_{10} (A) \log_{10} (B) \end{matrix}

where A and B are the number of viable microorganism, respectively before (control) and after treatment. The survival percentage (viable colonies) of the bacteria shows the number of alive colonies remaining after treatment of the cells.…”

Section: Resultsmentioning

confidence: 99%

“…Log reductions were calculated by using Equation (2) to determine the reduction of viable microorganisms using a logarithmic scale [33] A B log reduction log ( ) log ( ) 10 10…”

Section: Photodynamic Antimicrobial Chemotherapy Activities Of Copolymentioning

confidence: 99%

Enhanced Light‐Driven Antimicrobial Activity of Cationic Poly(oxanorbornene)s by Phthalocyanine Incorporation into Polymer as Pendants

Ahmetali

Şen

Süer

et al. 2020

Macro Chemistry & Physics

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Amphiphilic poly(oxanorbornene)s are promising synthetic polymers that mimic the structural properties and antimicrobial functions of naturally occurring antimicrobial peptides. Here, poly(oxanorbornene)s bearing pendant zinc(II) phthalocyanine and triphenyl(ethyl) phosphonium functionalities are synthesized by ring‐opening metathesis polymerization (ROMP). Fluorescence, singlet oxygen and triplet quantum yields of polymers are measured in dimethyl sulfoxide and aqueous medium. The singlet oxygen quantum yields of copolymers with the highest triphenyl and triethyl phosphonium content are found to be 0.29 and 0.41, respectively. Then, antimicrobial activities of polymers against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) are investigated under both dark and light conditions. Synergistic effect of zinc(II) phthalocyanine and phosphonium‐containing poly(oxanorbornene) is observed that the conjugate possessing the most triphenyl phosphonium side chains has the highest activity under light against both gram‐positive and gram‐negative bacterial strains after 80 min irradiation, reducing the survival of E. coli or S. aureus by 99.9999%. Hemolytic concentrations of the copolymers are found between 8 and 512 µg mL−1. Scanning electron microscopy (SEM) proves that the bacteria membrane deforms after contacting with the biocidal polymer.

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“…Creating magnetic clusters and hybrids [74,75] is one of the ways to increase spin density in SMMs [76] and, in general, to improve magnetic properties. In some cases, when there are additional centres with an uncompensated spin in the molecular structure [77,78], the MCE increases.…”

Section: Nanosystemsmentioning

confidence: 99%

Magnetocaloric Effect in Carbon-Containing Compounds

Korolev¹,

Ломова²,

Ramazanova³

2019

RENSIT

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The review is devoted to carbon-containing compounds with magnetic properties. It considers recent developments in the problem of synthesis and studying physico-chemical properties of single-molecule magnets (SMMs). It is shown that single-molecule magnets, such as graphene and its donor-acceptor complexes, metal complexes with Schiff 's bases, paramagnetic high-spin complexes of porphyrins/phthalocyanines, as well as 3D nanoparticles of metal oxides and hybrid composites of magnetic nanoparticles with graphene have a large and even giant magnetocaloric effect at temperatures close to room conditions, i.e. beyond the temperature range of magnetic transitions. For the first time, the behaviour of such molecular materials has been determined by a direct method on an original microcalorimetric apparatus and the first data on the interconnection between the chemical structure of their molecules and magnetothermal properties have been obtained.

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Photophysicochemical behaviour and antimicrobial properties of monocarboxy Mg (II) and Al (III) phthalocyanine-magnetite conjugates

Cited by 25 publications

References 45 publications

Diiodinated Mono‐ and Dipyridylvinyl BODIPY Dyes: Photophysicochemical Properties, in vitro Antibacterial Studies, Molecular Docking and Theoretical Calculations

Diiodinated Mono‐ and Dipyridylvinyl BODIPY Dyes: Photophysicochemical Properties, in vitro Antibacterial Studies, Molecular Docking and Theoretical Calculations

Enhanced Light‐Driven Antimicrobial Activity of Cationic Poly(oxanorbornene)s by Phthalocyanine Incorporation into Polymer as Pendants

Magnetocaloric Effect in Carbon-Containing Compounds

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