Electric field induced changes in the optical absorption of a merocyanine dye

Bücher, H.; Wiegand, J.; Snavely, B.B.; Beck, K.H.; Kuhn, Hans

doi:10.1016/0009-2614(69)85046-3

Cited by 46 publications

(9 citation statements)

References 10 publications

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“…Furthermore, the second‐order contribution is much smaller than the first‐order contribution (Supporting Information Table S2), and thereby the first‐order Stark effect is dominant, in good agreement with previous experimental and theoretical studies . Experimentally, the first‐ and second‐order effect has been observed for Stark (electroabsorption) spectroscopy in some cases from ordered Langmuir–Blodgett films . Particularly, Ardo et al provided evidence that energetics of the absorption bands of dye anchored to the semiconductor surface could be perturbed by an electric field directly along the dipole moment of the sensitizers that is created by the interfacial charge separation …”

Section: Resultssupporting

confidence: 82%

Quantitative investigation of local electric field through absorption spectrum in dye‐sensitized solar cells: Atomistic simulations

Zhang

2017

Int J of Quantum Chemistry

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The local transient electric field in dye‐sensitized solar cells (DSSCs), created by heterointerfacial charge transfer on illumination, exerts an important role in the internal photoelectronic processes occurring at dye/semiconductor heterointerface in the time‐resolved measurement, for example, transient absorption spectroscopy. Herein, on the basis of theoretical simulations, we proposed a general strategy to quantitatively examine the nature of local electric field (microscopic nature) through absorption spectra of adsorbed dye molecule (macroscopic observation). A controllably modulated external electric field is imposed on the sensitized system to couple to local electric field, resulting in the absorption spectrum shift of ground‐state dye molecules. By fitting absorption spectrum under applied external electric field with Gauss–Stark equation, the quantitative property of local electric field would be obtained. The Gauss–Stark equation reflects the quantitative relationship between the local electric field and absorption spectrum shift of adsorbed ground‐state dye molecule. Our study not only provides origin and magnitude of Stark effect in DSSCs but also offers a promising route to explore the elementary photoelectronic processes experimentally and theoretically.

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Section: Resultssupporting

confidence: 82%

Quantitative investigation of local electric field through absorption spectrum in dye‐sensitized solar cells: Atomistic simulations

Zhang

2017

Int J of Quantum Chemistry

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“…(4) The dye's spectrum may shift due to an electrochromic effect (Bücher et al, 1969;Liptay, 1969;Platt, 1969). In this case, the sign of the fluorescence response would not change with polarization but the magnitude may.…”

Section: Resultsmentioning

confidence: 99%

Mechanism of the membrane potential sensitivity of the fluorescent membrane probe merocyanine 540

Dragsten¹,

Webb²

1978

Biochemistry

164

127

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The fluorescence and optical absorption of the membrane-staining dye merocyanine 540 (M-540) have been widely used to measure cellular transmembrane potentials. We have studied the molecular mechanisms of these optical changes by measuring the fluorescence polarization of M-540 and its response to membrane potential changes in hemispherical lipid bilayer membranes. The fluorescence responds to a potential step in two distinct time scales: a fast response with a rise time less than the instrumental capability of 6 micromilligram and a slow response with a time constant around 10(-1) s. Both response amplitudes are proportional to the amplitude of the membrane potential change and both require an asymmetrical distribution of M-540 across the membrane. The slow response is ascribed to a net change of the dye concentration in the membrane. The fast response appears to be dominated by a change in the distribution of orientations of the dye molecules in the membrane, with a concomitant perturbation of a monomer-dimer equilibrium, due to interaction of the applied electric field with the permanent molecular dipol moment of M-540. The amplitude of the fast fluorescence response is concentration dependent and can be modeled by including membrane saturation effects and the presence of a nonfluorescent dimer species in the membrane at high dye concentrations. Absorbance changes reported by other investigators are consistent with this model mechanism.

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“…The complicated explanation invoked by Tasaki et al (1973 a, b), to explain the different behaviour of 2,6-TNS and 1,8-ANS involving movement of Ca 2+ during the activity of the nerve does not seem to be convincing after the observation that in phospholipid membranes the same changes are observed (Conti & Malerba, 1972). Brooker et al (1951) have synthesized a number of merocyanine dyes which have been shown to respond to electric fields in model systems (Bucher et al 1969). Davila et al (1973) have utilized a merocyanine dye in a squid giant axon.…”

Section: (B) Transmembrane Potentialsmentioning

confidence: 99%

The application of fluorescent probes in membrane studies

Azzi

1975

Quart. Rev. Biophys.

228

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Fluorescence has been used in biochemical studies for many years but only recently has the information content and the practical applicability of the fluorescence method been fully realized.Following the early studies of Newton (1954) and Weber (11954) and after the initial utilization of fluorescent probes by Chance and coworkers (Azziet al.1969) and Tasakiet al.(1968), in the study of membranes, the use of fluorescence to provide structural information at microscopic or molecular levels in biological membranes has become widespread. widespread. The application of the fluorescence technique to biological systems has progressed parallel to the development of a theoretical basis for fluorescence data interpretation and the synthesis of a large number of fluorescent probes, organic molecules having fluorescence characteristics that are dependent on their environment.

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Electric field induced changes in the optical absorption of a merocyanine dye

Cited by 46 publications

References 10 publications

Quantitative investigation of local electric field through absorption spectrum in dye‐sensitized solar cells: Atomistic simulations

Quantitative investigation of local electric field through absorption spectrum in dye‐sensitized solar cells: Atomistic simulations

Mechanism of the membrane potential sensitivity of the fluorescent membrane probe merocyanine 540

The application of fluorescent probes in membrane studies

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