Unsymmetrical squaraine dyes and applications thereof
AssigneeCouncil of Scientific and Industrial Research
InventorsJayaraj Nithyanandhan, Ambarish Kumar Singh, Amrita Singh
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Abstract
The present invention relates to an unsymmetrical squaraine dye of formula (I) and process for the preparation thereof. The process includes dissolving a 3-cycloalkene-1,2-dione compound in acetone and aqueous HCl to afford a semisquaraine compound. The process includes refluxing the semisquaraine compound and phenyl carboxylic acid dissolved in solvent to afford the unsymmetrical squaraine dye. Further, the present invention relates to an electronic device with an enhanced device efficiency containing a dye of formula (I) co-sensitized with a squaraine dye.
Claims15
An unsymmetrical squaraine dye of formula (I):
- wherein
- each of R1 to R3, independently, is selected from the group consisting of hydrogen, straight or branched chain C1 to C20 alkyl, C1 to C20 alkoxy, aryl, arylalkyl, fused aryl polyethylene glycol units, C1 to C10 perfluoroalkyl chains, halides, cyano;
- and trifluoromethyl;
- and
- R4 is hydrogen, C1 to C20 alkyl, or phenyl.
Dependencies are inferred from the claim text.