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1280728-80-4

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1280728-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1280728-80-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,0,7,2 and 8 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1280728-80:
(9*1)+(8*2)+(7*8)+(6*0)+(5*7)+(4*2)+(3*8)+(2*8)+(1*0)=164
164 % 10 = 4
So 1280728-80-4 is a valid CAS Registry Number.

1280728-80-4Downstream Products

1280728-80-4Relevant articles and documents

Synthesis, crystal structures, optical properties, and photocurrent response of heteroacene derivatives

Ren, Tiejun,Xiao, Jinchong,Wang, Wenying,Xu, Wenya,Wang, Sujuan,Zhang, Xuemin,Wang, Xuefei,Chen, Hua,Zhao, Jianwen,Jiang, Li

, p. 1943 - 1949 (2014)

Six 5,9,14,18-tetrathiaheptacene derivatives (1 a-1 f) were synthesized by using a simple ether-ether exchange reaction and fully characterized. In contrast to the planar conformation usually observed in thiophene-fused benzene systems, single-crystal analysis indicates that 7,16-dipropyl-5,9,14,18- tetrathiaheptacene (1 a), 7,16-diphenyl-5,9,14,18-tetrathiaheptacene (1 b), and 7,16-di(4 -chlorophenyl)-5,9,14,18-tetrathiaheptacene (1 c) adopt chair conformations. The as-formed dihedral angle between anthracene and the terminal benzene units are 137.258, 137.855, and 134.912° for 1 a, 1 b, and 1 c, respectively, which is close to the theoretical optimization results (128° for 1 b). Interestingly, the oxidized product of 7,16-di(trifluoromethylphenyl)- 5,9,14,18-tetrathiaheptacene (1 e) has a saddle shape, which results in the formation of column-shaped units in the single crystal. The substituents on the side phenyl group have less effect on their UV/Vis absorption spectra, but a distinct redshift that accounts for the intramolecular charge transfer can be observed in the emission spectra. The electrochemical measurements show that all compounds present two oxidation waves. The photoswitching behavior based on 1 a-1 f was further measured and the experimental results suggest that these heteroacene derivatives are promising semiconductor materials for organic electronics. Pull up a chair! Six 5,9,14,18-tetrathiaheptacene derivatives (1 a-1 f) were synthesized and characterized (see figure). Derivatives 1 a, 1 b, and 1 c adopt a chair conformation and the dihedral angle between anthracene and the terminal benzene units were 137.258, 137.855, and 134.912°, respectively. Moreover, the photoswitching behavior with 1 a-1 f as donors and SWCNT as an acceptor indicated that these heteroacenes are promising organic semiconductor materials.

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