In 2019,Journal of Photochemistry and Photobiology, A: Chemistry included an article by Heydari, Zahra; Rashidi-Ranjbar, Parviz. Electric Literature of C8H8Br2. The article was titled 《Synthesis and photophysical properties of a new carbazole-based acidochromic molecular switch》. The information in the text is summarized as follows:
A reversible color-changing and fluorescence mol. switch was designed and synthesized based on carbazole fluorophores and amino group receptors. The crab shape mol. 1 is not soluble in most organic solvents and showslow solubility in acetic acid and DMSO (1 mg/mL in DMSO). The solution of 1 in DMSO performed as single on/off switch triggered by acidic protons. The colorless solution in basic and neutral conditions turned to yellow upon addition of a small amount of acid together with quench in fluorescence emission. The solid state of 1 has a dual-mode fluorescence switching property. The creamy white powder of 1has an emission λmax at 398 nm but when exposed to acidic vapors or suspended into acidic mediathe color of the powder changed to yellow and its emission λmax appeared at 516 nm. Monte-Carlo simulation has been performed to search the conformational space of the neutral and acidic forms. The frontier MOs of the most stable conformers has been calculated using DFT/B3LYP method using 6-31 g (d) basis set in attempt to explain the difference in electronic transition of 1 and its porotonated form.1,4-Bis(bromomethyl)benzene(cas: 623-24-5Electric Literature of C8H8Br2) was used in this study.
1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Electric Literature of C8H8Br2 The most pervasive is the naturally produced bromomethane.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary