Fluorescence behavior and singlet oxygen generating abilities of aluminum phthalocyanine in the presence of anisotropic gold nanoparticles

Mthethwa, Thandekile; Nyokong, Tebello

doi:10.1016/j.jlumin.2014.09.005

Cited by 21 publications

(7 citation statements)

References 39 publications

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“…The surface plasmon resonance (SPR) absorption band of the gold nanoparticles observed at 517 nm disappeared after surficial functionalization with compounds 2 and 4 and confirmed the complete surficial modification. Further, the electronic absorption spectra of compounds 2 and 4 slightly blue-shifted approximately 3 nm in the presence of gold nanoparticles [ 53 ].…”

Section: Resultsmentioning

confidence: 99%

Sonophotochemical and photochemical efficiency of thiazole-containing metal phthalocyanines and their gold nanoconjugates

FARAJZADEH,

YENİLMEZ,

ATMACA

et al. 2023

Turkish Journal of Chemistry

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This study presents the synthesis of some metal {M = Zn(II), Lu(III), Si(IV)} phthalocyanines bearing chlorine and 2-(4-methylthiazol-5-yl) ethoxy groups at peripheral or axial positions. The newly synthesized metal phthalocyanines were characterized by applying FT-IR, 1 H NMR, mass, and UV-Vis spectroscopic approaches. Additionally, the surface of gold nanoparticles was modified with zinc(II) and silicon(IV) phthalocyanines. The resultant nanoconjugates were characterized using TEM images. Moreover, the effect of metal ions and position of substituent, and gold nanoparticles on the photochemical and sonophotochemical properties of the studied phthalocyanines was investigated. The highest singlet oxygen quantum yield was obtained for the lutetium phthalocyanine by applying photochemical and sonophotochemical methods. However, the linkage of the zinc(II) and silicon(IV) phthalocyanines to the surface of gold nanoparticles improved significantly their singlet oxygen generation capacities.

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Section: Resultsmentioning

confidence: 99%

Sonophotochemical and photochemical efficiency of thiazole-containing metal phthalocyanines and their gold nanoconjugates

FARAJZADEH,

YENİLMEZ,

ATMACA

et al. 2023

Turkish Journal of Chemistry

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“…Modification of their surface with compounds (1-3) led to aggregation (twinned particles) and an increase in their size (larger single; approximately 5 nm) due to the π-π interactions between the phthalocyanines which resulted in the approach of the nanoparticles (Figure 2). [32,33,45,46]…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Fluorinated Phthalocyanine/Silver Nanoconjugates for Multifunctional Biological Applications

Albayrak

Farajzadeh

Yenilmez

et al. 2023

Chemistry & Biodiversity

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In this study, a new phthalonitrile derivative namely 4‐[(2,4‐difluorophenyl)ethynyl]phthalonitrile (1) and its metal phthalocyanines (2 and 3) were synthesized. The resultant compounds were conjugated to silver nanoparticles and characterized using transmission electron microscopy (TEM) images. The biological properties of compounds (1–3), their nanoconjugates (4–6), and silver nanoparticles (7) were examined for the first time in this study. The antioxidant activities of biological candidates (1–7) were studied by applying the 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) radical scavenging assay. The highest antioxidant activity was obtained 97.47 % for 200 mg/L manganese phthalocyanine‐silver nanoconjugates (6). The antimicrobial and antimicrobial photodynamic therapy (APDT) activities of biological candidates (1–7) were examined using a micro‐dilution assay. The highest MIC value was obtained 8 mg/L for nanoconjugate 6 against E. hirae. The studied compounds and their silver nanoconjugates exhibited high APDT activities against all the studied microorganisms. The most effective APDT activities were obtained 4 mg/L for nanoconjugates (5 and 6) against L. pneumophila and E. hirae, respectively. All the studied biological candidates displayed high cell viability inhibition activities against E. coli cell growth. The biofilm inhibition activities of the tested biological candidates were also investigated against S. aureus and P. Aeruginosa. Biological candidates (1–6) can be considered efficient metal nanoparticle‐based materials for multi‐disciplinary biological applications.

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“…The size of nanoparticles functionalized with phthalocyanines slightly increased as the π-π stacking between the modifying phthalocyanines led to H-aggregates 46,47 and the approach of adjacent nanoparticles (larger single or twinned particles). [48][49][50] The TEM images of NG and NG-3 are depicted in Fig. 2.…”

Section: Tem Analysismentioning

confidence: 99%

New phthalonitrile/metal phthalocyanine–gold nanoparticle conjugates for biological applications

et al. 2022

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Fluorescence behavior and singlet oxygen generating abilities of aluminum phthalocyanine in the presence of anisotropic gold nanoparticles

Cited by 21 publications

References 39 publications

Sonophotochemical and photochemical efficiency of thiazole-containing metal phthalocyanines and their gold nanoconjugates

Sonophotochemical and photochemical efficiency of thiazole-containing metal phthalocyanines and their gold nanoconjugates

Fluorinated Phthalocyanine/Silver Nanoconjugates for Multifunctional Biological Applications

New phthalonitrile/metal phthalocyanine–gold nanoparticle conjugates for biological applications

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