Process for the preparation of tetraselenotetracene halides and electrically conductive polymer compositions
US5417911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1993 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Feb 10, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B1/121
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of tetraselenotetracene chlorides or bromides of formula I, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another H or F; R.sub.1 is CH.sub.3 and R.sub.2, R.sub.3 and R.sub.4 are H; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each CH.sub.3 ; or R.sub.1 and R.sub.2 are CH.sub.3 or Cl, and R.sub.3 and R.sub.4 are H, and X is Cl or Br, which process includes reacting a tetraselenotetracene of formula II ##STR2## in a polar aprotic solvent, with stoichiometric amounts of an ammonium hydrochloride or hydrobromide, in the presence of oxygen at elevated temperature. An organic binder may be dissolved in the reaction solution and a substrate coated with this solution. After evaporation of the solvent, electrically conductive coatings are obtained that consist of a network of crystal needles of compounds of formula I in the binder matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.