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488-86-8

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Gelormini,Artz
p. 2483,2485, 2492
(1930)
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Organic dye compositions and use thereof in photovoltaic cells
The present invention provides in one aspect a composition having at least one croconine derivative. This composition may be disposed on a semiconductor layer which is further disposed on an electrically conductive surface to provide a dye-sensitized electrode. The dye-sensitized electrode can be assembled together with a counter electrode and a redox electrolyte to provide a photovoltaic cell. The photovoltaic cell may be used as a single cell or in tandem with other cells.
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Page/Page column 14

(2010/11/25)

Process for producing croconic acid or salt thereof
Croconic acid or a salt thereof is easily produced at low cost by a reaction of a hydrocarbon compound consisting of a five-membered ring or a hydrocarbon compound consisting of a five-membered ring having an oxo group and/or a monovalent group linked via an oxygen atom with a halogenating agent.
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Page/Page column 4

(2008/06/13)

The photochemistry of the rhodizonate dianion in aqueous solution
The photochemistry of the rhodizonate dianion at 483 nm has been studied in aqueous solution at pH 8.3.In the absence of oxygen no reaction was observed.In the presence of oxygen, 6.2 x 10-5 M, the dianion was consumed with a quantum yield of 0.044.The oxidation apparently did not involve the formation of O2(1Δg).Electron transfer from the excited dianion was observed with methyl viologen.
Iraci, G.,Back, M. H.
p. 1293 - 1294
(2007/10/02)

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Chemical Properties

Appearance/Colour :gold-coloured powder
Melting Point: >300 °C(lit.)
Boiling Point: 291.7 °C at 760 mmHg
Flash Point:144.4 °C
Density: 2.311 g/cm³
Storage Temp.:room temp
Vapor Pressure: 1.98E-06mmHg at 25°C
Refractive Index: 1.619
PKA: 0.92±0.25(Predicted)
BRN: 2043130
PSA: 91.67000
LogP: -0.96510

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