Nonlinear optical behavior of neodymium mono- and bi-nuclear phthalocyanines linked to zinc oxide nanoparticles and incorporated into poly acrylic acid

Sekhosana, Kutloano Edward; Amuhaya, Edith; Nyokong, Tebello

doi:10.1016/j.poly.2015.12.045

Cited by 16 publications

(8 citation statements)

References 43 publications

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“…The ESR bandwidth of complex 2 at 298 K is $8.01 G, which is broader than the bands of the other neodymium based phthalocyanines. 55 The ESR spectroscopy data for complex 2 was reported earlier 39 and is provided in Fig. S3.…”

Section: Mass Spectrometrymentioning

confidence: 99%

Nonlinear optical behavior of n-tuple decker phthalocyanines at the nanosecond regime: investigation of change in mechanisms

Sekhosana

Nyokong

2019

RSC Adv.

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Section: Mass Spectrometrymentioning

confidence: 99%

Nonlinear optical behavior of n-tuple decker phthalocyanines at the nanosecond regime: investigation of change in mechanisms

Sekhosana

Nyokong

2019

RSC Adv.

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“…e.g. ZnO (structure 34 in Chart 6) [86], the synergistic effect on the OL action of the resulting combination can be still observed ( Figure 10). The combination of a zinc phthalocyanine anchored to Au NPs via amino groups (structure 35 in Chart 6) has been also reported for OL purposes and the relative results are presented in Figure 11 [87].…”

Section: Chartmentioning

confidence: 96%

Conjugated macrocyclic materials with photoactivated optical absorption for the control of energy transmission delivered by pulsed radiations

Calvete

Dini

2018

Journal of Photochemistry and Photobiology C: Photochemistry Re

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The control of the transmission of the energy transported by optical waves is of extreme importance for the realization of those advanced technologies which require high speed of operation and fast switching. Such a task can be approached through the design and preparation of materials that possess modulable optical properties. In the present review the aspect of material science behind the realization of the effect of optical limiting, OL (or optical power limiting, OPL), will be considered focusing on those materials based on conjugated metallo-macrocycles like porphyrins, phthalocyanines and derivatives. The choice of these molecular materials for OL purposes is motivated by the fact that the optical properties of such annulated systems can be finely modulated in a controlled fashion by changing the chemical structure of the complex. These changes involve the variation of the central metal, the extent of electronic conjugation of the ring, the nature and the number of peripheral ligands, and the eventual introduction of axial ligands coordinated by a central metals with a valence higher than +2. An attempt will be made to establish relationships between the structure of the macrocyclic complex and the relative OL properties taking into account the most recent developments in the field. During this analysis we will also discuss the aspect of optically passivity, i.e. the characteristic of the OL materials of undergoing fast changes of optical properties according to an internal mechanism of self-activation.

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“…The ESR band width obtained for complex 2 at 298 K was~8.01 G, which is quite broader compared to the other neodymium based phthalocyanines. [64] On the other hand, complex 3 exhibited no ESR signal ( Figure S4). Similar behavior was observed for complexes 4 and 5 ( Figure S4).…”

Section: Electronic Ground State Absorption Spectroscopymentioning

confidence: 99%

The Primary Demonstration of Exciton Coupling Effects on Optical Limiting Properties of Blue Double‐Decker Lanthanide Phthalocyanine Salts

2018

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In this manuscript, novel green and blue sandwich-type rareearth phthalocyanines (LnPc 2 ) are presented. This parent green LnPc 2 complex is named bis-{2(3),9(10),16(17),23(24)-tetra(4tert-buylphenoxy) phthalocyaninato} neodymium (III) (2) and modified into blue LnPc 2 complexes (3), (4) and (5) based on hexadecyltrimethylammonium ion, mononeodymium(III) diacetate and monodysprosium(III) diacetate as counter ions, respectively. These stable blue lanthanide Pc salts are highly soluble in many organic and inorganic solvents. All complexes 2, 3, 4 and 5 were studied for optical limiting for the first time using Z-scan at nanosecond regime in the visible absorption spectral wavelength (532 nm). Our studies reveal the advantage of exciton coupling in blue sandwich-type rare-earth phthalocyanines over the p-radicals (characterized by blue valence at 485 nm) in the green counterpart which are in resonance with the 532 nm wavelength for optical limiting application. Large singlet ground state to excited state absorption cross section ratios were found, particularly for complex 5 in comparison to that of complex 2.[a] Dr.

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Nonlinear optical behavior of neodymium mono- and bi-nuclear phthalocyanines linked to zinc oxide nanoparticles and incorporated into poly acrylic acid

Cited by 16 publications

References 43 publications

Nonlinear optical behavior of n-tuple decker phthalocyanines at the nanosecond regime: investigation of change in mechanisms

Nonlinear optical behavior of n-tuple decker phthalocyanines at the nanosecond regime: investigation of change in mechanisms

Conjugated macrocyclic materials with photoactivated optical absorption for the control of energy transmission delivered by pulsed radiations

The Primary Demonstration of Exciton Coupling Effects on Optical Limiting Properties of Blue Double‐Decker Lanthanide Phthalocyanine Salts

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