Third-order optical nonlinearities of bis(phthalocyanines)

Shirk, James S.; Lindle, J. R.; Bartoli, F. J.; Boyle, Michael E.

doi:10.1021/j100193a038

Cited by 151 publications

(67 citation statements)

References 3 publications

(6 reference statements)

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“…The first report was by Hosada et al who determined the third-order optical susceptibilities for spin-coated films of the free-base and manganese complex by optical third-harmonic generation measurements at a wavelength of 1907 nm and compared the data for this "standard" [18p] porphyrin with the N,N′,N″,Nٞ-tetramethyl-octaethyl [26]porphyrin bistrifluoroacetate 86. [102] This first study on the influence of extension of the p-system in an expanded porphyrin gave a five times larger v 3 value for the expanded system.…”

Section: Third-order Nlo Effects In Porphyrinsmentioning

confidence: 99%

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Nonlinear Optical Properties of Porphyrins

et al. 2007

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Porphyrins and phthalocyanines have outstanding chemical and thermal stability. The macrocyclic structure and chemical reactivity of tetrapyrroles offers architectural flexibility and facilitates the tailoring of chemical, physical and optoelectronic parameters. The specific optical properties of the tetrapyrrole macrocycle combined with the synthetic methodologies now available and the already available theoretical and spectroscopic knowledge on their optical behavior make porphyrins a target of choice for this area. They are versatile organic nanomaterials with a rich photochemistry and their excited state properties are easily modulated through conformational design, molecular symmetry, metal complexation, orientation and strength of the molecular dipole moment, size and degree of conjugation of the π‐systems, and appropriate donor‐acceptor substituents. Here we review the structural chemistry and optical properties of recently synthesized porphyrin derivatives that offer potential for nonlinear optical (NLO) applications and complement existing studies on phthalocyanines. Classes of interest include the classic A4 symmetric tetrapyrroles, while optimized systems include push‐pull porphyrins, oligomeric and supramolecular self‐assembled systems, films and nanoparticle systems, and highly conjugated porphyrin arrays.

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Section: Third-order Nlo Effects In Porphyrinsmentioning

confidence: 99%

“…[25] The effect of the transition and rare-earth metals ( [15,26] The c values were one order of magnitude larger than those of the typical metallophthalocyanines, as expected for such highly delocalized systems. Blau [30] Another recent study investigated the spectral dependence of the 3rd order NLO susceptibility of (phthalocyaninato)zinc((II).…”

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confidence: 99%

Nonlinear Optical Properties of Porphyrins

et al. 2007

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“…Phthalocyanines and related compounds are known as versatile dyestuffs and enjoy various applications in industrial and medical fields [4,5], e.g. non-linear optics [6], optical data storage [7], solar cells [8], charge-generating materials for photocopiers and laserprinters [9], elecrochromic displays [10,11], photosensitizers for solar cells (DSC) [12] and photocatalysts [13], those for photodynamic therapy (PDT) [14] of tumors and photodynamic antimicrobial therapy (PACT) [15], chemical probes for bio-imaging (photodynamic diagnosis (PDD) of cancer) [16], semiconductors [17] and synthetic metals [18], and are also well-known to undergo this kind of phenomenon [14,[19][20][21][22][23][24][25][26][27]. Aggregation of dye molecules is quite an interesting subject from a viewpoint of supramolecular chemistry [28] because this gives rise to significant changes in their physical properties.…”

Section: Introductionmentioning

confidence: 99%

Solvent effects on molecular aggregation of highly water-soluble phthalocyanines

Isago

Fujita

2018

J. Porphyrins Phthalocyanines

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Molecular aggregation phenomena of a highly water-soluble, metal-free phthalocyanine, H 2 Pc, and its copper complex, Cu(Pc); where Pc denotes tetrakis{(2′,6′-dimethyl-4′-sulfonic acid) phenoxy}phthalocyaninate) in water, ethanol, and their mixed solvent systems have been investigated by spectroscopic approach. In both aqueous and ethanolic solutions, H 2 Pc molecules aggregate in a slipped-cofacial manner, although very weakly in ethanol. On the other hand, Cu(Pc) molecules aggregate in a cofacial manner in water while aligning in a slipped-cofacial manner in ethanol. Magnetic circular dichroism spectroscopy was undertaken to investigate aggregation behaviors of Cu(Pc) in water and ethanol. Presence of 4-phenylpyridine in ethanol effectively inhibited aggregation of Cu(Pc) molecules, although little affected the spectra of the monomers. In a mixed solvent system, where water/ethanol = 10/90 (v/v), Cu(Pc) is free from aggregation up to almost 10 -4 M. Driving forces of this molecular aggregation are discussed on the basis of p-p interaction and coordination chemistry involving copper ions. KEYWORDS:water-soluble, phthalocyanine, copper, metal-free, magnetic circular dichroism, aggregation-disaggregation, J-aggregation, solvent effects.

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“… ref is taken to be 4.0X10 -13 esu (Philip et al, 1999;Shrik et al, 1992). The figure of merit F www.intechopen.com was calculated using the equation (3) /   .…”

Section: Polythiophenesmentioning

confidence: 99%