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137842-48-9

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137842-48-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137842-48-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,4 and 2 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 137842-48:
(8*1)+(7*3)+(6*7)+(5*8)+(4*4)+(3*2)+(2*4)+(1*8)=149
149 % 10 = 9
So 137842-48-9 is a valid CAS Registry Number.

137842-48-9Downstream Products

137842-48-9Relevant articles and documents

PHOTOCODUCTIVITY OF POLY(ARYLENEVINYLENE)S AND POLY(HETARYLENEVINYLENE)S

Lang, Michael,Kretzschmann, Holger,Meier, Herbert

, p. 11 - 18 (2007/10/02)

The intramolecular condensation of aromatic Schiff bases leads under strong alkaline conditions to the poly(arylenevinylene)s and poly(hetarylenevinylene)s A-H.Due to the extreme stereoselectivity the resulting products are rigid, (E)-configurated polymers.The broad band gap of the unsubstituted intrinsic insulators is decreased by alkoxy substituents.Investigations of the photoconductivity and the photoreactivity, as well as of the AC-conductivity of some undoped, doped and quaternized systems are performed. - Keywords: poly(arylene vinylene), poly(hetarylene vinylene), steroeselectivity, conductivity, photoconductivity, reactivity, prepolymers

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