Results 181 to 190 of about 6,902 (225)

Spectroscopic studies on merocyanine photoisomers. III. Redox potentials and spectral shifts of merocyanine photoisomers.

NIPPON KAGAKU KAISHI, 1989
ジメチン型メロシアニンは可視光によってシス-トランス異性化を起こし, シス化にともなって極大吸収波長はすべて長波長シフトする。ポリメチンでは短波長シフトする例が多いとされているが, メロシアニンではどのような機構により逆の性質が現われるのかを調べるため, HOMO, LUMO と強い相関がある酸化電位 (Eox), 還元電位 (Ered) を測定した。光異性化にともなう酸化還元電位の変化を測定した例はこれがはじめてである。熱異性化速度がいちじるしく遅いため光異性体を唯一単離しえた MD-CO の Eox は trans-, cis- でそれぞれ 0.362, 0.340V (vs.
Hitoshi FUNAKOSHI, Keietsu TAMAGAKE, Yuzaburo FUJITA   +2 more
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Merocyanine Aggregation in Mesoporous Networks

Journal of the American Chemical Society, 1996
Nanocrystalline films of TiO2, Al2O3, and ZrO2 were used as hosts for the merocyanine 3-acetyl-5-(2-(3-ethyl-2-benzothiazolidinylidene)ethylidene)rhodanine (Mc2) to scrutinize templating effects in the accommodation of the dye within their porous network.
F. Nüesch, J. E. Moser, V. Shklover, M. Grätzel   +3 more
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Merocyanine-type dyes from barbituric acid derivatives

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
The preparation and the solvatochromic behavior of two dyes, obtained by condensation of N,N'-dimethylbarbituric acid with dimethylaminobenzaldehyde and with 4,4'-bis(N,N-dimethylamino)benzophenone (Michler's ketone) are described. The latter dye is rather sensitive to the polarity of the medium, and in particular, to the hydrogen-bond-donor ability of
M C, Rezende, P, Campodonico, E, Abuin, J, Kossanyi   +3 more
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Fundamental Studies on Brooker's Merocyanine

Journal of the American Chemical Society, 1997
The spectroscopic properties of solvent soluble derivatives of Brooker's simple merocyanine 4-[(1-methyl-4(1H)-pyridinylidene)ethylidene]-2,5-cyclohexadien-1-one, which can in principle exist in two distinct canonical forms, have been assessed both experimentally and theoretically using molecular orbital methods.
John O. Morley, Richard M. Morley, Robert Docherty, Michael H. Charlton   +3 more
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Photochemical Activity of Merocyanine Dyes

International Journal of Thermophysics, 2009
Time-resolved photothermal responses of merocyanine dyes were used to estimate such parameters as the quenching rate constant of dye triplet states and dye capability of singlet oxygen generation, which are helpful in explanation of the dye photochemical activity.
A. Dudkowiak, E. Teślak, B. Olejarz
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Distribution of merocyanine 540 in phospholipid membranes

Journal of Fluorescence, 1993
The interaction of the fluorescent photosensitizer merocyanine 540 (MC-540) with model phospholipid membranes was studied. Two different-colored species (monomers and dimers) of MC-540 were registered in phospholipid liposomes. Variations in both phospholipid composition (DMPC, DPPC, POPC, egg PC) and temperature (15-60°C) resulted in changes in the MC-
L, Sikurová, R, Franková
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Interaction of merocyanine 540 with charged membranes

Bioelectrochemistry, 2002
In this work, phospholipid liposomes were used to investigate the influence of lipid negative charge on the interaction of merocyanine 540 (MC540) with model membranes. Liposomes were prepared from a mixture of neutral dimyristoyl lecithin (DMPC) and negatively charged dimyristoyl phosphatidic acid (DMPA).
Anton, Mateasik, Libusa, Sikurová, Dusan, Chorvát   +2 more
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Carotenoid and Merocyanine Probes in Chromatophore Membranes

1975
Increasing awareness of the vast amount of information that can be obtained from intrinsic and extrinsic probes of membrane phenomena has led to a wide-ranging survey of the properties of both types of probe. Intrinsic probes of photosynthetic membranes are provided by the carotenoid pigments.
Britton Chance, Margareta Baltscheffsky, W. K. Cheng   +2 more
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Highly Fluorescent Merocyanine and Cyanine PMMA Copolymers

Macromolecular Rapid Communications, 2018
AbstractPolymerizable merocyanine and cyanine dye monomers are synthesized and applied in a statistical copolymerization with methylmethacrylate, giving a series of highly fluorescent poly(methyl methacrylate) (PMMA) copolymers. Photophysical properties of yellow to red merocyanine‐ and of pink to dark purple cyanine‐containing copolymers are studied ...
Peter Pasch, Julian Papadopoulos, Andreas Goralczyk, Marc L. Hofer, Monir Tabatabai, Thomas J. J. Müller, Laura Hartmann   +6 more
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Destruction of membranes by merocyanine 540

Journal of Luminescence, 1997
Abstract The effect of a photosensitizer merocyanine 540 (MC 540) on the bilayer structure of model phospholipid membranes was studied using diphenylhexatriene (DPH) fluorescence anisotropy and light-scattering techniques. A pronounced reduction of DPH anisotropy decay within 60 min of DPH incubation was induced by the presence of MC 540 in lecithin ...
L. Šikurová, B. Čunderlíková
openaire   +1 more source