Two-photon absorption properties of push–pull oxazolones derivatives

Rodrigues, Catarina A. B.; Mariz, Inês F. A.; Maçôas, Ermelinda; Afonso, Carlos A. M.; Martinho, J. M. G.

doi:10.1016/j.dyepig.2012.06.005

Cited by 53 publications

(24 citation statements)

References 57 publications

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“…The field of pyrazolone and its metal complexes in chemistry is developing very rapidly because of its importance in the area of coordination chemistry [9,[11][12][13][14]. The pyrazolone have also found applications outside the pharmaceutical field, such as in the solvent extraction of metal ions [15], ligands in complexes with catalytic activity [16] and optical characteristics [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Correlation between ionic radii of metal azodye complexes and electrical conductivity

El-Ghamaz

El‐Sonbati

Diab

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Introductionmentioning

confidence: 99%

Correlation between ionic radii of metal azodye complexes and electrical conductivity

El-Ghamaz

El‐Sonbati

Diab

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…σ 2PA is calculated by using equation 7 From linear spectrocopic data and the other properties like refractive index of solvent molar extinction coefficient two photon absorption (TPA) cross section is calculated. Also, the transition dipole moment is obtained from Stokes shift is used for the TPA cross section

true σ_{((), ν)}^{2} = \frac{12}{5} \frac{l n 10 π 10^{3} L^{4}}{N_{A} h c^{2} n^{2}} ((), \frac{ϵ_{10 ((), ν)}}{υ_{10}}) Δ μ_{10}^{2}

true L = ((), \frac{2 n^{2} + 2}{3})

…”

Section: Resultsmentioning

confidence: 99%

Coumarin and Hydroxyl Decorated Viscosity Sensitive Triphenylamine Derivatives: Synthesis, Photophysical Properties, Viscosity Sensitivity, TD‐DFT, and NLO Properties

2019

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Three novel hydroxyl substituted and triphenylamine sidearm coumarin decorated molecules were prepared to examine the effect of adjacent hydroxyl substituent as well as coumarin units on the photophysical linear and nonlinear optical properties. Both hydroxyl function adjacent to the phenyl ring and extra coumarin unit is attributed to the red shifted absorption (435‐487 nm) and emission (496‐578 nm) compared to the plain triphenylamine based coumarin derivatives. Positive solvatochromism around 70 nm was observed in solvents with different polarity polarities and it is reinforced by solvent polarity plots and multilinear regression study. Very high viscosity induced emission enhancement (5.7 – 8.2 fold) was observed for in ethanol/polyethylene glycol‐400 system, highlighting their capability to act as efficient fluorescent molecular rotors (FMRs). The nonlinear optical properties were investigated by solvatochromism as well as a computational method using B3LYP 6–311++G (d, p) basis set. All these compounds exhibited large magnitudes of first order (65‐208x10 −30e.s.u) and second order (560‐2120x10 −36e.s.u) hyperpolarizability.

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“…Typical two photon absorption compounds are exclusively D‐π‐A molecules with rigidified acceptor and different donors. In the present work, σ 2PA for the synthesized fluorophores are studied through the solvatochromsim method . On the basis of the two‐level model described in the supporting information, σ 2PA were calculated for 5 a‐c using the equation ( S7 ) and are summarized in Table .…”

Section: Resultsmentioning

confidence: 99%

N‐Ethyl Carbazole Derived D‐π‐A‐π‐D Based Fluorophores: Consolidated Spectroscopic, Viscosity and DFT Studies

2019

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This article reports design and synthesis of three new fluorophores (5 a‐c) with the donor‐π‐acceptor‐π‐donor motif, where dicyano vinylene group is the central acceptor, N‐ethyl carbazole group is a fixed donor and varying the N‐substituted secondary donors so as to study their photophysical behavior. Based on the systematic photophysical and theoretical reconnaissances, the fluorophores structure‐property relationships are defined. Their spectral and photophysical behaviors are affected by the solvent polarity, with a significant bathochromic shift in emission and large Stoke shifts being observed in polar solvents. Contrary to dipolar asymmetric analogue this system shows an efficient intramolecular charge transfer as observed from various solvent polarity plots. For 5 a, 5 b, and 5 c, the viscosity induced emission studies show respectively 3.78, 6.53, and 6.82 times enhancement in their fluorescence intensity and hence act as a fluorescent molecular rotor (FMR). The structure and electronic properties of these fluorophores were evaluated using density functional theory computations using B3LYP/6‐311++G(d,p). The frontier molecular orbitals and the optimized geometry reveal that secondary donors in each fluorophore donate the electron and not the N‐ethyl carbazole group which is more twisted. The non‐linear and linear optical properties were determined employing solvatochromic and computational methods in solvents of varying polarities with results falling within the expected limiting values. The linear and non‐linear optical properties of the fluorophores change with the strength of different secondary donors used and solvent polarity. The two photon absorption cross‐section described using two level approximation is highest for 5 b (115‐172 GM).

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Two-photon absorption properties of push–pull oxazolones derivatives

Cited by 53 publications

References 57 publications

Correlation between ionic radii of metal azodye complexes and electrical conductivity

Correlation between ionic radii of metal azodye complexes and electrical conductivity

Coumarin and Hydroxyl Decorated Viscosity Sensitive Triphenylamine Derivatives: Synthesis, Photophysical Properties, Viscosity Sensitivity, TD‐DFT, and NLO Properties

N‐Ethyl Carbazole Derived D‐π‐A‐π‐D Based Fluorophores: Consolidated Spectroscopic, Viscosity and DFT Studies

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