Nonplanar Butterfly-Shaped π-Expanded Pyrrolopyrroles was written by Krzeszewski, Maciej;Kodama, Takuya;Espinoza, Eli M.;Vullev, Valentine I.;Kubo, Takashi;Gryko, Daniel T.. And the article was included in Chemistry – A European Journal in 2016.Recommanded Product: Benzo[b]thiophen-3-ylboronic acid This article mentions the following:
Large aza-analogs of curved polycyclic aromatic hydrocarbons with a double-helicene structure present unique features for mol. photonics. We present the preparation and characterization of three such structures. The synthesis of these heterocyclic nanographenes involves only a few high-yield steps that use readily available starting materials. X-ray anal. revealed that each of these new dyes has three conformational isomers: one diastereoisomer in a meso form and two enantiomers in twisted forms [(P,P)] and [(M,M)]. The low energy barriers between the conformers, however, prevent their separation by using chiral HPLC, and the NMR spectra show only one set of signals for each of these curved compounds D. functional theory (DFT) calculations quantify the small energy difference and the small energy barriers between the chiral and meso forms, which fully supports the exptl. results. Their optical absorption lacks any sensitivity to the solvent environment, whereas their fluorescence features exhibit pronounced solvatochromism. This rarely observed solvatofluorochromism of centrosym. mols. without either electron-withdrawing groups or -donating substituents was probed by using time-resolved spectroscopy. These studies suggest that, similar to 9,9′-bianthryl, the nonpolar locally excited state shows negligible solvatochromism, whereas the charge-transfer state is sensitive to solvent polarity. In the experiment, the researchers used many compounds, for example, Benzo[b]thiophen-3-ylboronic acid (cas: 113893-08-6Recommanded Product: Benzo[b]thiophen-3-ylboronic acid).
Benzo[b]thiophen-3-ylboronic acid (cas: 113893-08-6) belongs to benzothiophene derivatives. Benzothiophenes are valuable heterocycles that are widely used in medicines, agrochemicals, and materials science. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.Recommanded Product: Benzo[b]thiophen-3-ylboronic acid
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem