Electro-optical properties of DNA

Bertolotto, J. A.; Roston, Graciela B.; Ascheri, María Eva

doi:10.1007/b97076

Cited by 8 publications

(14 citation statements)

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“…In their work, Bertolotto et al [12] reported the existence of a model which adequately describes the steady-state electro-optical behavior of DNA. In another work, Park and Stroud [13] described a model for structural development of a DNA/gold nanoparticle aggregate and calculated its optical properties.…”

Section: Resultsmentioning

confidence: 97%

Static first order hyperpolarizabilities of DNA base pairs: A configuration interaction study

Seal

Jha

Chakrabarti

2008

Journal of Molecular Structure: THEOCHEM

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Section: Resultsmentioning

confidence: 97%

Static first order hyperpolarizabilities of DNA base pairs: A configuration interaction study

Seal

Jha

Chakrabarti

2008

Journal of Molecular Structure: THEOCHEM

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“…The flexibility of the molecules is included considering the solution of flexible BRM as a mixture of rigid BRM with a conformational distribution function G{%) [5].…”

Section: F(0v) = Tz + [H Q (E\ir)]e + [S Q (E\ir) + Sa I (E\ir)]ementioning

confidence: 99%

“…In order to explain the sign reversal of the electric birefringence, in Bertolotto et al [5], we considered a solution of molecules represented by charged BRM, polarizable but not polar. The orientational distribution function, that is solution of the Fokker-Planck equation of the system at the steady state, is given in powers of E until the second order for the terms that depend on the electric charge q and until the forth order for the ones involving the electric polarizability.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, on the basis of the theory developed in previous works [4], [5], [7], [8] we calculate the electric dichroism of DNA fragments modeled as flexible charged and polarizable BRM. The orientational distribution function of the molecules is obtained from the Fokker-Planck equation of the system by means of a perturbation method until the fourth order of field E both for the terms involving q and for the ones depending on the electric polarizability.…”

Section: Introductionmentioning

confidence: 99%

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Reduced Electric Linear Dichroism of DNA Fragments in Aqueous Solutions

Bertolotto¹,

Roston²,

Corral³

et al. 2007

AIP Conference Proceedings

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Articles you may be interested in DNA translocation through short nanofluidic channels under asymmetric pulsed electric field Biomicrofluidics 8, 024114 (2014); 10.1063/1.4871595Electric and hydrodynamic stretching of DNA-polymer conjugates in free-solution electrophoresis A Brownian dynamics-finite element method for simulating DNA electrophoresis in nonhomogeneous electric fields Abstract. We calculate the reduced electric linear dichroism at the steady state for DNA fragments in aqueous solutions modeled as flexible broken rod molecules (BRM). The electrical and optical properties of the BRM are characterized by the corresponding tensors and by a charge q with a uniform linear distribution. Each rod has N monomers that are chromophore groups with an average transition probability tensor. The reduced electric linear dichroism of BRM solution is calculated from the anisotropy in the absorption of each molecule, integrating over all the orientations, employing the steady-state orientational distribution function of the system. We first obtain the analytical solution of the Fokker-Planck equation for the system by using a perturbation method where the orientational distribution function is expanded in powers of the perturbation parameter until the fourth order. Then we solve the differential equation for each order of perturbation applying the Fourier method for expanding series. Finally, we compare the results of this theory with experimental curves of reduced electric linear dichroism as a function of the electric field for aqueous solutions of DNA fragments.

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“…Nowadays, the influence of hydrodynamic coupling on the electro-optical effects (electric birefringence and dichroism) of DNA fragments has been studied through Brownian dynamic simulation [3][4][5] and theoretical methods. [6][7][8][9][10][11][12][13][14][15] Theoretical analytic results have been reported only for the limit of low electric field strength because the study of the orientational process induced by electric field has mathematical difficulties. Simulation studies early made are applied for arbitrary electric field strength but they have a disadvantage; they require computer simulations that are too extensive.…”

Section: Introductionmentioning

confidence: 99%

Electric linear dichroism transients of bent DNA fragments

Umazano

Bertolotto

2013

The Journal of Chemical Physics

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We study the effect of translational-rotational hydrodynamic coupling on the transient electric linear dichroism of DNA fragments in aqueous solution. As opposed to previous theoretical works, where analytic solutions valid in the limit of low electric field were reported, we present here a numerical approach which allows to obtain numerical results valid independently from the applied electric field strength. Numerical procedures here used are an extension to the transient-state of those developed in a previous work for the study of the problem in the steady-state. The molecular orientational processes induced by an electric field is characterized with statistical arguments solving the FokkerPlanck equation by means of the finite difference method to know the orientational distribution function of molecules.

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Electro-optical properties of DNA

Cited by 8 publications

References 1 publication

Static first order hyperpolarizabilities of DNA base pairs: A configuration interaction study

Static first order hyperpolarizabilities of DNA base pairs: A configuration interaction study

Reduced Electric Linear Dichroism of DNA Fragments in Aqueous Solutions

Electric linear dichroism transients of bent DNA fragments

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