Chlormethylierung in der Thiophenreihe V. Über die Alkoxylierung von Thiophen

Janda, M.

doi:10.1135/cccc19632524

Cited by 12 publications

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“…Die qualitative und quantitative elektrochemische Detektion von organischen Kationen mittels ionenselektiver Membranen ist in der Literatur seit 1970 dokumentiert [1]. Neben den klassischen anorganischen lonen sind heute auch eine Vielzahl von pharmazeutisch und medizinisch wichtigen organischen lonen, wie z.…”

Section: Alkaloides / Biosensors / Electrochemistry / Lon-selective-eunclassified

“…One of the possibilities is the selective anodic cleavage according to Eq. (1), which was found with the parent compound thiophene at platinum [1,2] and at lead dioxide [3,4]: (1) In the course of our systematic investigation into the employment of a carbon black slurry electrode as a model for a possible large scale anodic oxidation of milled coal in aqueous electrolytes, we found the current voltage behaviour of these slurry electrodes to be highly characteristic for the carbon black itself. If some important parameters of the slurry electrode as carbon black concentration, stirring intensity or voltage scan rate are held constant, a simple method is available for the study of the carbon black.…”

Section: Introductionmentioning

confidence: 98%

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Cyclovoltammetric Characterization of Carbon Black Slurry Electrodes

Heydecke¹,

Beck²

1988

Ber Bunsenges Phys Chem

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Carbon Black / Electrochemistry / Slurry Electrode / Surfaces Slurry electrodes in 1 M H lP04 , made from carbon blacks with a specific surface ranging from 28 to 1475 m 2 g-t, were studied by cyclovoltammetry (5 mV S-I) at potentials between -0.1 V and +2.3 V vs. SHE. A large anodic peak and a small cathodic one is found, with an extreme peak separation (1.5 V) and with a charge ratio of 3: 1 to 5: 1. Charge transfer at the feeder is hindered by insulating surface layers on the carbon black. Part of the anodic peak is due to the irreversible oxidation of the solid. The initial curves are governed by the large capacity of the system. -This slurry electrode differs widely from that made with metal powders or hard graphite. The particles strongly adhere to the feeder and build up a porous system. The exchange with the dispersed particles is poor. In spite of this, the curves are reproducible, they reflect the specific surface and it is possible to recognize features with respect to the anodic oxidation of carbon black.

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Section: Alkaloides / Biosensors / Electrochemistry / Lon-selective-eunclassified

Section: Introductionmentioning

confidence: 98%

Cyclovoltammetric Characterization of Carbon Black Slurry Electrodes

Heydecke¹,

Beck²

1988

Ber Bunsenges Phys Chem

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Section: Introductionunclassified

“…Almost fifty years ago Glemser [1] had discovered a series of four hydrogen molybdenum bronzes HxMoO) (0 < x < 2). Since that time the compounds have been characterised by different physical and chemical methods, among which especially IH_ and 2D-NMR [2][3][4][5] as well as X-ray [6] and Table 1 Phases Intercalation type H2 -pressure In the two phase region ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Herstellung eines Berberin‐Sensors und seine Eigenschaften

Aubeck¹,

Hampp²,

Bräuchle³

1988

Ber Bunsenges Phys Chem

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The fabrication and the properties of a berberine‐sensitive electrode are reported. It is based on a highly lipophilic ion pair from berberine and tetraphenylborate (BerbTPB). PVC liquid membranes containing 10% BerbTPB were characterized by use of a newly developed transducer (BIOBRID‐module). The detection limit of the berberine‐sensor is 10−8 mol/l, the linear response range is observed from 10−7 to 10−5 mol/l. Interference of inorganic cations like Na+, K+, Li+, Mg2+ and Ca2+ is negligible (Apotij < 10−4). The logarithmic cross selectivity coefficients for some structural related alkaloids show that BerbTPB is a suitable selective ion pair for the manufacture of a liquid membrane based potentiometric berberine sensor (Coralyne 10−0.6, Papaverine 10−2.1, Atropine 10−4.2).

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Physical Properties of Thiophene Derivatives

Gronowitz

Hörnfeldt

1991

Chemistry of Heterocyclic Compounds: A Series of Monographs

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Chlormethylierung in der Thiophenreihe V. Über die Alkoxylierung von Thiophen

Cited by 12 publications

References 0 publications

Cyclovoltammetric Characterization of Carbon Black Slurry Electrodes

Cyclovoltammetric Characterization of Carbon Black Slurry Electrodes

Herstellung eines Berberin‐Sensors und seine Eigenschaften

Physical Properties of Thiophene Derivatives

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