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444727-22-4

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444727-22-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 444727-22-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,4,7,2 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 444727-22:
(8*4)+(7*4)+(6*4)+(5*7)+(4*2)+(3*7)+(2*2)+(1*2)=154
154 % 10 = 4
So 444727-22-4 is a valid CAS Registry Number.

444727-22-4Relevant articles and documents

Synthesis and optical characterization of unsymmetrical oligophenylenevinylenes

Freydank, Anke C,Humphrey, Mark G,Friedrich, Reiner W,Luther-Davies, Barry

, p. 1425 - 1432 (2007/10/03)

An efficient route to highly soluble unsymmetrical oligo(phenylenevinylenes) (OPVs) has been developed. The OPVs are end-substituted with donor alkoxy and acceptor sulfonyl groups for charge polarization and incorporate a methacrylate unit suitable for co-polymerization. The absorption and excitation spectra of the OPVs and their precursors have been examined; vibronic features are noted, and π-system lengthening and introduction of polarizing substituents red-shift the spectral maxima.

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