Maximum quantity allowed is 999
Poly(Fe-btpyb) Purple (Product No. P2789) is a metallo-coordination polymer exhibiting an electrochromic property (EC), and an applying voltage shows a color change from purple to colorless. One particular property is ‘memory effect’ in which the displayed color is maintained upon power off. An EC device using Poly(Fe-btpyb) Purple involves potential applications toward light control glass and light control film.
This product was developed for research and development use.
Please contact National Institute for Materials Science (NIMS), Japan (contract_administrator@nims.go.jp), if you purchase it for purpose of industrial use.
Poly(Fe-btpyb) Purple is a purple powder. The color is caused by an absorption around 580 nm of metal-to-ligand charge transfer (MLCT) transition from Fe(II) to the ligand. The MLCT absorption disappears by the electrochemical oxidation of Fe(II) to Fe(III).*1
*1 Working: an ITO glass coated with Poly(Fe-btpyb) Purple; Counter: Pt wire; Reference: Ag/Ag+; Electrolyte: an acetonitrile solution with LiClO4
Potential applications toward light control glass and light control film 1)
① Prepare two ITO glasses (glasses coated with ITO) (Size: 10 × 10 cm; Sheet resistance: <10 Ω/sq)
② Coat Poly(Fe-btpyb) Purple on ITO glass either by spray or spin coating the methanol solution (3 mg/mL)*2*3
*2 An uncoated part (5-10 mm) is required to connect with a battery
*3 Counter layer is prepared on another ITO glass, if needed 2)
③ Load the gel electrolyte*4*5 on another ITO glass and spread it uniformly*6
*4 A mixture of LiClO4 (1.5 g), propylene carbonate (10 mL), and PMMA powder (10 g) (Degassing by stirring the gel for 2 hours at rt under reduced pressure is recommended before use)
*5 Amount: 10-20 g
*6 An uncoated part (5-10 mm) is required to connect with a battery
④ Bond the two glasses of ② and ③ together so that the Poly(Fe-btpyb) Purple layer and the gel electrolyte layer face each other*7
*7 Bond the two glasses of ② and ③ together so that the Poly(Fe-btpyb) Purple layer and the gel electrolyte layer face each other
⑤ Clip the stacked glasses and anneal it for 5 minutes at 100 ºC
⑥ Remove the clips to obtain the electrochromic (EC) device
① Prepare two AA batteries, a battery holder, and two alligator clips
② Connect the series-connected batteries to two bear parts of the ITO glasses using the alligator clips.*8
③ The original purple color disappears when (+) of the battery is connected to the ITO glass coated with Poly(Fe-btpyb) Purple.*8
*8 Power off once the color change ends, to prevent the degradation of the device
An image can be displayed on the device when a transparent film with the image cut is put on a Poly(Fe-btpyb) Purple layer during the device fabrication.*9
*9 The film-coated part does not show any color changes, because the film prevents anion transfer to the Poly(Fe-btpyb) Purple layer.
