| Abstract
| - We report the preparation and characterization of new electrochromic polymers containing a4-butyltriphenylamine (BuTPA) unit on the main chain. All polymers were obtained through the Suzuki−Miyaura cross-coupling reaction between 4-butyl-N,N-bis((4,4,5,5-tetramethyl-1,3,2-dioxaborolan-4-phenyl)aniline) and several aryl dibromide molecules to modulate the electronic properties of the resultingcopolymers. 2,5-Dibromothiophene, 2,5-dibromo(3,4-ethylenedioxythiophene), 3,6-dibromo-N-octylcarbazole, bis(6-bromo-N-octylcarbazol-3-yl), and 2,7-dibromo-3,6-dimethoxy-9,9-dihexylfluorene wereused as comonomers and led to five new copolymers, PT(BuTPA), PE(BuTPA), PC(BuTPA),PCC(BuTPA), and PF(BuTPA). These polymers are readily soluble in many common organic solvents,which make them suitable for spray-coating film deposition. Electrochromic cells with the followingconfiguration were assembled: ITO-coated glass or plastic/electrochromic polymer/gel electrolyte/ITO-coated glass or plastic or conducting textile. These copolymers exhibit good optical and electrochemicalproperties for military camouflage needs with color transition from pale yellow to green, transparent tokhaki, or pale green to reddish-brown. Electrochemistry, spectroelectrochemistry, and colorimetricmeasurements of the devices were examined.
- New 4-butyltriphenylamine-based copolymers were obtained through the Suzuki cross-coupling reaction and used as the active layer in transmissive electrochromic cells. All polymers were readily soluble in most common organic solvents and were spray-coated onto ITO-coated glass or plastic electrodes. A conductive textile was used as cathode to obtain hybrid plastic/textile electrochromic cells for adaptive camouflage.
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