Diastereoselective self-assembly of a triple-stranded europium helicate with light modulated chiroptical properties was written by Zhang, Zhihui;Zhou, Yanyan;Gao, Ting;Yan, Pengfei;Zou, Xiaoyan;Li, Hongfeng. And the article was included in Dalton Transactions in 2021.Formula: C9H7BrS This article mentions the following:
Chiroptical photoswitches are of increasing interest for their potential in advanced information technologies. Herein, an achiral bis-β-diketonate ligand (o-L) with a photoresponsive diarylethene moiety as a linker was designed, which co-assembled with Eu3+ ions and R- and S-bis(diphenylphosphoryl)-1,10-binaphthyl (R/S-BINAPO) as chiral ancillaries to form dinuclear triple-stranded helicates, [Eu2(o-L)3(R/S-BINAPO)2]. The helicates in the enantiopure form were confirmed by 1H, 19F, 31P NMR and DOSY NMR analyses. Also, the mirror-image CD and CPL spectra also demonstrate the existence of stable ground- and excited-state chiralities in solution When exposed to alternate UV and visible light, the helicates showed reversible color variations from colorless to purple, followed by the presence of light-triggered quadruple optical and chiroptical outputs, named CD, PL, CPL and glum switches. With these light-modulated optical outputs, the possibility for the fabrication of IMPLICATION and INHIBIT logic gates is discussed. In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Formula: C9H7BrS).
3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene scaffolds are of great importance due to its increased presence in bioactive molecules. Due to its aromaticity, thiophenes do not exhibit the same properties as conventional thioethers.Formula: C9H7BrS
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem