Xu, Zhen et al. published their research in European Polymer Journal in 2022 | CAS: 128-08-5

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Product Details of 128-08-5

Color-tuning neutrality for soluble black-to-transmissive electrochromics via solution co-processing was written by Xu, Zhen;Wang, Bozhen;Kong, Lingqian;Zhao, Jinsheng;Zhang, Yan. And the article was included in European Polymer Journal in 2022.Product Details of 128-08-5 This article mentions the following:

Chem. polymerization towards obtaining alternating copolymers ECP-B and ECP-R of the electron-acceptor (2,2′-biindoline)-3,3′-dione or benzotriazole and the electron-donor thiophene derivatives, with or without long alkyl chain substituents serving as solubilization components, was performed in advance. Electrochromic studies demonstrated that ECP-B transformed from neutral-state blue to an oxidized-state transmissive light cyan color, while ECP-R displayed a red color in the neutral state and a transparent light gray color in the oxidized state. Then, the neutral-state black polymer electrochrome (ECP-2) was obtained by blending two donor-π-acceptor (D-π-A) copolymers with complementary spectral absorption via solution co-processing in different mix ratio. The film ECP-2 in 1:2 mass ratio of ECP-R to ECP-B demonstrated a full range of visible absorption, and switched between an improved saturated black neutral state (L* = 57.3, a* = 4, b* = -7) and a light cyan transmissive oxidation state (L* = 77.6, a* = -4, b* = -5) reversibly with the moderate optical contrast of ca. 30%, the fast switching speed as low as 1.2 s, and the high coloration efficiency (222 cm2 ·C-1), which suggested a promising method for large area electrochromic device applications. Besides, a larger contrast (65.9%) in NIR region (1500 nm) for the ECP-2 film concomitant with an outstanding coloring efficiency (515 cm2 ·C-1) and a fast response time (0.6 s) were favorable for many NIR applications. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Product Details of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Product Details of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary