Electric field induced second harmonic generation (EFISH) experiments in the swivel cell: New aspects of an established method

Dworczak, Renate; Kieslinger, Dietmar

doi:10.1039/b005326k

Cited by 17 publications

(11 citation statements)

References 37 publications

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“…The electric-field induced second-harmonic generation (EFISHG) technique is a third-order process characterized by a nonlinear polarization P 2ω . In the presence of an optical field parallel to the applied static electric field, the electric-field-dependent susceptibility is reduced to − where ⟨γ⟩ is the orientationally averaged second hyperpolarizability, and β is the first hyperpolarizability. The scalar product (·), denoted as β vec , defines the vector component projected onto the ground state dipole moment …”

Section: Methodsmentioning

confidence: 99%

Laurdan as a Molecular Rotor in Biological Environments

Osella

Knippenberg

2019

ACS Appl. Bio Mater.

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Laurdan is one of the most used fluorescent probes for lipid membrane phase recognition. Despite its wide use for optical techniques and its versatility as a solvatochromic probe, little is known regarding its use as molecular rotor, for which clear evidence is found in the current study. Although recent computational and experimental studies suggest the existence of two stable conformations of laurdan in different membrane phases, it is difficult to experimentally probe their prevalence. By means of multiscale computational approaches, we prove now that this information can be obtained through the optical properties of the two conformers, ranging from one-photon absorption over two-photon absorption to the first hyperpolarizability. Fluorescence decay and anisotropy analyses are performed as well and stress the importance of laurdan’s conformational versatility. As a molecular rotor and with reference to the distinct properties of its conformers, laurdan can be used to probe biochemical processes that change the lipid orders in cell membranes.

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Section: Methodsmentioning

confidence: 99%

Laurdan as a Molecular Rotor in Biological Environments

Osella

Knippenberg

2019

ACS Appl. Bio Mater.

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“…Compounds 9, 10 and 13 were subjected to EFISH measurements 23 of first hyperpolarizability and dipole moment mb (EFISH output is depicted in Figure 2). The experimental results as well as calculated theoretical values 12 are presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Preparation of Novel Push-Pull Benzothiazole Derivatives with Reverse Polarity: Compounds with Potential Non-Linear Optic Application

Hrobárik¹,

Sigmundová²,

Zahradnı́k³

2004

Synthesis

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P u s h -P u l l B e n z o t h i a z o l e D e r i v a t i v e s w i t h R e v e r s e P o l a r i t y Abstract: The hitherto unknown 6-dimethylaminobenzothiazole-2-carbaldehyde was prepared as a starting compound for the synthesis of novel push-pull benzothiazole derivatives with reverse polarity. These compounds are substituted at the 2-position by strong electron-acceptor groups and at the 6-position by NMe 2 as strong electron-donor. The new method for synthesis of 6-dimethylaminobenzothiazole involved the successful use of sonochemical reductive methylation. Expected non-linear optical properties of target molecules were studied by EFISH method.

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“…[61] Standard approaches for example, "Electric Field Induced Second Harmonic Generation (EFISHG), Hyper-Rayleigh scattering (HRS), [62,63] solvatochromic [56,[64][65][66] and Z-scan method, [52,61,67,68,69] can be used to determine NLO characteristics of molecules. [70,71] The simplicity and sensitivity of the Z-scan method make it more versatile for measuring " third-order nonlinear optical susceptibility(χ 3 ), nonlinear refractive index (� 2 ), optical limiting (OL) values, nonlinear absorption coefficients(β)". [72][73][74][75][76] In the present study, six azo disperse dyes, Disperse Red 343 1 a, 1 c, and 1 e include N-ethyl-N-methylethanamine, and 1 d has N-aryl as a strong donor.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, anthraquinone‐based azo dyes also show improved NLO properties [61] . Standard approaches for example, “Electric Field Induced Second Harmonic Generation (EFISHG), Hyper‐Rayleigh scattering (HRS), [62,63] solvatochromic [56,64–66] and Z‐scan method, [52,61,67,68,69] can be used to determine NLO characteristics of molecules [70,71] . The simplicity and sensitivity of the Z‐scan method make it more versatile for measuring “ third‐order nonlinear optical susceptibility(χ 3 ), nonlinear refractive index (ɳ 2 ), optical limiting (OL) values, nonlinear absorption coefficients(β)“ [72–76] …”

Section: Introductionmentioning

confidence: 99%

NLOphoric Azo Dyes Studied Using Z‐Scan

Ramugade

Ghanavatkar

Mathew³

et al. 2022

ChemistrySelect

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Disperse Red 343((E)‐N‐(2‐((2,6‐dicyano‐4‐methylphenyl) diazenyl) ‐ 5 ‐ (diethylamino) phenyl)methanesulfonamide,1 a), Disperse Red177((E) ‐ methyl3‐((2‐cyanoethyl)(4‐((6‐nitrobenzo [d]thiazol‐2‐yl)diazenyl) phenyl) amino) propanoate,1 b), Disperse Blue 165((E) ‐ N ‐ (2 ‐ ((2,6 ‐ dicyano ‐ 4 ‐nitrophenyl)diazenyl)‐5‐ (diethylamino) phenyl) acetamide, 1 c), Disperse Blue 165.1((E) ‐ N ‐ (5 ‐ (benzyl (ethyl) amino) ‐ 2 ‐ ((2‐cyano ‐ 4,6‐dinitrophenyl) diazenyl) phenyl) acetamide, 1 d), Disperse Blue 366 ((E) ‐ 2 ‐ ((4‐ (diethylamino) ‐ 2 ‐ methylphenyl) diazenyl) ‐ 5 nitroisophthalonitrile, 1 e), and Disperse Blue 148((E) ‐ methyl 3‐(ethyl (4 ‐ ((5 ‐ nitrobenzo [c]I sothiazol‐3‐yl) diazenyl) phenyl) amino) propanoate, 1 f) were examined in solvents for their non‐linear optical properties using Z‐scan technique. Because of their CT characteristics, they have shown positive solvatochromism. As observed in nonpolar solvents, the ground states are more stable than their excited states. Changes in solvating the low‐lying ground state and the state above generate the bathochromic shift in vertical excitation. The dye 1 b produces the maximum x3(7.95×10-134pte.s.u.) due to strong NO2 donor‐ п‐ acceptors systems in DMSO. We found a positive nonlinear refractive index (η2) in both series using the closed aperture (valley‐peak) compared to the other five disperse dyes. Dye 1 c (with two cyano groups) has a ′larger nonlinear susceptibility (χ3)′ in DMSO than in the other two solvents (acetone, ethanol). Dye 1 a–1 f showed LDT (9.109, 6.553,4.641,6.44) W/m2 respectively. The “nonlinear absorptive coefficient (β), nonlinear refractive index (η2), third‐order nonlinear optical susceptibility χ(3) and optical limiting (OL)” of acetone, ethanol, and DMSO are determined using the Z‐scan technique, and the results are significantly better than earlier known dyes.

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Electric field induced second harmonic generation (EFISH) experiments in the swivel cell: New aspects of an established method

Cited by 17 publications

References 37 publications

Laurdan as a Molecular Rotor in Biological Environments

Laurdan as a Molecular Rotor in Biological Environments

Preparation of Novel Push-Pull Benzothiazole Derivatives with Reverse Polarity: Compounds with Potential Non-Linear Optic Application

NLOphoric Azo Dyes Studied Using Z‐Scan

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