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1349683-00-6

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1349683-00-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1349683-00-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,9,6,8 and 3 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1349683-00:
(9*1)+(8*3)+(7*4)+(6*9)+(5*6)+(4*8)+(3*3)+(2*0)+(1*0)=186
186 % 10 = 6
So 1349683-00-6 is a valid CAS Registry Number.

1349683-00-6Relevant articles and documents

Preparation and acid-responsive photophysical properties of T-shaped π-conjugated molecules containing a benzimidazole junction

Inouchi, Toshifumi,Nakashima, Takuya,Toba, Masaya,Kawai, Tsuyoshi

, p. 3020 - 3027 (2011)

T-shaped π-conjugated molecules with an N-methyl-benzimidazole junction have been synthesized and their acid-responsive photophysical properties owing to the change in the π-conjugation system are discussed. T-shaped π-conjugated molecules consist of two orthogonal π-conjugated systems including a phenyl thiophene extended from the 2-position and alkyl phenylenes connected through various π-spacers from the 4,7-positions of the N-methyl-benzimidazole junction. The π-spacers, such as thiophene, ethyne, and ethane, have an effect on the acid response of photophysical properties in terms of changes in conformation, excited-state energy and charge-transfer (CT) characteristics. In particular, the π-conjugated molecule with ethynyl spacers exhibited a marked redshift in the fluorescence spectrum with a large Stokes shift upon the addition of acid, whereas the other molecules showed substantial quenching. The redshift in emission was studied in detail by temperature-dependent fluorescence measurements, which indicated the transition to a CT state over the finite activation energy at the excited state. The change in the frontier molecular orbitals upon acid addition was further discussed by means of DFT calculations.

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