Nonlinear optical properties of metal free and nickel binuclear phthalocyanines

Kabwe, Kapambwe Peter; Louzada, Marcel; Britton, Jonathan; Olomola, Temitope O.; Nyokong, Tebello; Khene, Samson

doi:10.1016/j.dyepig.2019.05.003

Cited by 23 publications

(4 citation statements)

References 30 publications

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“…It is known that Pc complexes offer opportunity of technological applicability including electrocatalysis, electrochromism, and energy-producing devices such as fuel cells and metalÀ air batteries, due to their ability to transfer multiple electrons in succession at moderate potentials [26]. However, aggregation phenomena is generally among the biggest obstacles to technological applicability of Pc compounds [27].…”

Section: Voltammetric Measurementsmentioning

confidence: 99%

Electrochemical, Spectroelectrochemical, and Electrocatalytic Dioxygen Reducing Properties of Peripheral Tetra‐2,6‐dimethoxyphenoxy Substituted Phthalocyanines

et al. 2021

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By using of peripherally tetrakis-2,6-dimethoxyphenoxy substituted Co(II), Fe(III), and Mn(III) phthalocyanines was observed to extend the redox richness of the phthalocyanine ring with the addition of reversible metal-based electron transfer couples to the phthalocyanine ring-based electron transfer processes in solution. The emergence of highly steady anionic and cationic redox species with clear spectral and colour changes both in solution and in the film during in situ spectroelectrochemical and in situ electrocolorimetric measurements pointed out their applicability as electrochromic materials. Furthermore, the phthalocyanine complexes demonstrated strong interaction with dioxygen and thus, high electrocatalytic enforcement for its reduction.

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Section: Voltammetric Measurementsmentioning

confidence: 99%

Electrochemical, Spectroelectrochemical, and Electrocatalytic Dioxygen Reducing Properties of Peripheral Tetra‐2,6‐dimethoxyphenoxy Substituted Phthalocyanines

et al. 2021

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“…In this context, phthalocyanine-based complexes, which present strong absorption in the therapeutic window, good singlet oxygen quantum yield, and excellent thermal stability (Robertson et al, 2009 ; Liu et al, 2018 ), have aroused great interest and have been considered second-generation photosensitizers for use in PDT. In general, hexacoordinated phthalocyanine complexes bearing different d-metal ions can be synthesized (Liu et al, 2007 ; Kabwe et al, 2019 ; Mohammed et al, 2019 ; Yin et al, 2019 ), to afford flexible environments that could form octahedral species. To explore the structure–activity relationship of this group further, it is important to investigate the anti-cancer efficacy and specificity of new phthalocyanine complexes, which may shed light on the cytotoxicity of these compounds during clinical therapy of different types of cancer.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Some Axial Ligands on Ruthenium–Phthalocyanine Complexes: Chemical, Photochemical, and Photobiological Properties

Martins

Negri

Pernomian

et al. 2021

Front. Mol. Biosci.

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This work presents a new procedure to synthesize ruthenium–phthalocyanine complexes and uses diverse spectroscopic techniques to characterize trans-[RuCl(Pc)DMSO] (I) (Pc = phthalocyanine) and trans-[Ru(Pc)(4-ampy)2] (II) (4-ampy = 4-aminopyridine). The triplet excited-state lifetimes of (I) measured by nanosecond transient absorption showed that two processes occurred, one around 15 ns and the other around 3.8 μs. Axial ligands seemed to affect the singlet oxygen quantum yield. Yields of 0.62 and 0.14 were achieved for (I) and (II), respectively. The lower value obtained for (II) probably resulted from secondary reactions of singlet oxygen in the presence of the ruthenium complex. We also investigate how axial ligands in the ruthenium–phthalocyanine complexes affect their photo-bioactivity in B16F10 murine melanoma cells. In the case of (I) at 1 μmol/L, photosensitization with 5.95 J/cm2 provided B16F10 cell viability of 6%, showing that (I) was more active than (II) at the same concentration. Furthermore, (II) was detected intracellularly in B16F10 cell extracts. The behavior of the evaluated ruthenium–phthalocyanine complexes point to the potential use of (I) as a metal-based drug in clinical therapy. Changes in axial ligands can modulate the photosensitizer activity of the ruthenium phthalocyanine complexes.

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“…Among numerous organic semiconductors, metal phthalocyanines (MPc) are of particular interest because of their high thermal and chemical stability combined with their unique electronic properties. Being stable organic semiconductors, MPcs are used in energy-conversion devices (photovoltaic and solar cells), optical devices and as active layers of chemical sensors [1][2][3][4]. Films of MPcs are widely used as active layers of chemiresistive sensors [5,6].…”

Section: Introductionmentioning

confidence: 99%

Vanadyl Phthalocyanine Films and Their Hybrid Structures with Pd Nanoparticles: Structure and Sensing Properties

Klyamer

Sukhikh

Николаева

et al. 2020

Sensors

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In this work, thin films of vanadyl phthalocyanines (VOPc and VOPcF4) are studied as active layers for the detection of gaseous ammonia and hydrogen. The effect of F-substituents on the structural features of vanadyl phthalocyanine films and their sensor response toward ammonia (10–50 ppm) and hydrogen (100–500 ppm) is investigated by X-ray diffraction (XRD) and chemiresistive methods, respectively. It is shown that the sensor response of VOPcF4 films to ammonia is 2–3 times higher than that of VOPc films. By contrast, the sensor response to hydrogen is higher in the case of VOPc films. Apart from this, the hybrid structures of vanadyl phthalocyanine films with Pd nanoparticles deposited on their surface by a chemical vapor deposition method are also tested to reveal the effect of Pd nanoparticles on the sensitivity of VOPc films to hydrogen. Deposition of Pd nanoparticles on the surface of VOPc films leads to the noticeable increase of their sensitivity to hydrogen.

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Nonlinear optical properties of metal free and nickel binuclear phthalocyanines

Cited by 23 publications

References 30 publications

Electrochemical, Spectroelectrochemical, and Electrocatalytic Dioxygen Reducing Properties of Peripheral Tetra‐2,6‐dimethoxyphenoxy Substituted Phthalocyanines

Electrochemical, Spectroelectrochemical, and Electrocatalytic Dioxygen Reducing Properties of Peripheral Tetra‐2,6‐dimethoxyphenoxy Substituted Phthalocyanines

The Influence of Some Axial Ligands on Ruthenium–Phthalocyanine Complexes: Chemical, Photochemical, and Photobiological Properties

Vanadyl Phthalocyanine Films and Their Hybrid Structures with Pd Nanoparticles: Structure and Sensing Properties

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