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1346523-59-8

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1346523-59-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1346523-59-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,6,5,2 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1346523-59:
(9*1)+(8*3)+(7*4)+(6*6)+(5*5)+(4*2)+(3*3)+(2*5)+(1*9)=158
158 % 10 = 8
So 1346523-59-8 is a valid CAS Registry Number.

1346523-59-8Relevant articles and documents

Non-conjugated dendrimers with a porphyrin core and coumarin chromophores as peripheral units: Synthesis and photophysical properties

Mao, Mao,Song, Qin-Hua

, p. 975 - 981 (2012/03/27)

Three porphyrin-cored dendrimers with non-conjugated coumarins as dendrons have been synthesized and characterized. The photophysical properties of the title compounds were investigated by means of UV/Vis absorption and fluorescence spectroscopy in dilute CH2Cl2 solutions and in thin neat films. The intramolecular energy transfer from the coumarin units to the porphyrin core clearly reveals two factors influencing energy-transfer efficiency. Firstly, a better spectral overlap between the absorption spectrum of porphyrin core and the emission spectrum of the coumarin moiety results in high energy-transfer efficiency. Secondly, a long alkyl side-chain improves solubility of dendrimers, but also prevents the coumarins from self-quenching. Hence, the dendrimer with N-octyl groups possesses a higher efficiency than that with N-ethyl groups. The dendrimers emit red light with higher fluorescence quantum yields over the free porphyrin.

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