Electrochemistry and photophysics of donor-substituted triarylboranes: symmetry breaking in ground and excited state was written by Stahl, Rainer;Lambert, Christoph;Kaiser, Conrad;Wortmann, Ruediger;Jakober, Ruth. And the article was included in Chemistry – A European Journal in 2006.Computed Properties of C8H8Br2 This article mentions the following:
We synthesized a series of amino substituted triarylboranes (TABs) by copper(I)-catalyzed cross-coupling reactions. The title compounds were investigated by means of cyclic voltammetry (CV) and UV-visible absorption and fluorescence spectroscopy. Electrochem. oxidation of tris(4-carbazolyl-2,6-dimethylphenyl)borane (3) leads to the formation of an electroactive polymer film on the electrode surface. The charge-transfer (CT) absorption band of all three TABs shows a pronounced neg. solvatochromism, while the emission is pos. solvatochromic. By combining Jortner’s theory, AM1 computations, and electrooptical absorption measurements (EOAM), this unexpected behavior was shown to be due to a dipole inversion upon S0→S1 excitation. Furthermore, polarized steady-state fluorescence spectroscopy and EOAM prove that the ground-state geometry of 3 is of lower symmetry than D3 and that the excitation energy can be transferred from one subchromophore to another within the lifetime of the excited state. Exciton-coupling theory was used to quant. analyze this excitation transfer. In the experiment, the researchers used many compounds, for example, 2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2Computed Properties of C8H8Br2).
2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Computed Properties of C8H8Br2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary