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1240423-29-3

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1240423-29-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240423-29-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,4,2 and 3 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1240423-29:
(9*1)+(8*2)+(7*4)+(6*0)+(5*4)+(4*2)+(3*3)+(2*2)+(1*9)=103
103 % 10 = 3
So 1240423-29-3 is a valid CAS Registry Number.

1240423-29-3Upstream product

1240423-29-3Downstream Products

1240423-29-3Relevant academic research and scientific papers

One-pot synthesis of β-carboxy tetra aryl porphyrins: potential applications to dye-sensitized solar cells

Silviya Reeta,Kandhadi, Jaipal,Lingamallu, Giribabu

, p. 2865 - 2867 (2010)

A facile one-pot conversion of 2-formyl-5,10,15,20-tetra aryl-substituted porphyrins and their zinc derivatives to the corresponding 2-carboxy-5,10,15,20-tetra aryl-substituted porphyrins was achieved for the first time by using hydroxylamine hydrochloride and phthalic anhydride. All these substituted carboxy porphyrins were completely characterized by using mass, CHN analysis, 1H NMR, UV-vis, Fluorescence spectroscopies, and cyclic voltammetry. Both the absorption maxima and emission maxima were red shifted by 5-7 nm. The LUMO of these porphyrins are above the TiO2 conduction band and HOMO was below the redox electrolytes. These carboxy porphyrins are potential applications as sensitizers to dye-sensitized solar cell.

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