The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Circular dichroisms (CDs) of neutral and protonated [3.3]anthracenopyridinophane (1 and 1‐H+) were investigated experimentally and theoretically. Introducing an anthracene moiety with extended conjugation affected the cyclophane structure with the bent angles being appreciably reduced from those of parent [3.3]pyridinophane. The Cotton effects (CEs) observed at the 1Bb band for both 1 and 1‐H+ were...
Isophthalic and terephthalic acid monoesters of cyclic nigerosyl‐(1→6)‐nigerose (CNN), a cyclic tetrasaccharide composed of four d‐glucopyranosyl residues connected by alternating α‐1,3‐ and α‐1,6‐linkages, were synthesized as novel chiral supramolecular sensitizers for enantiodifferentiating photoisomerization of (Z)‐cyclooctene (1Z) to planar chiral (E)‐isomer (1E). Despite the saucer‐shaped shallow...
For mechanistic elucidation of the photosensitized cyclization of 5‐hydroxy‐1,1‐diphenylpentene (1), its methyl ether (4) was synthesized as an unreactive “dummy” substrate and used as a quencher of the sensitizer fluorescence to reveal the intervention of an exciplex intermediate that was unable to detect when reactive substrate 1 was used as a quencher/reactant In the enantiodifferentiating photocyclization...
The electronic circular dichroism (CD) spectra of donor–acceptor binaphthyls were investigated experimentally and theoretically. The enantiomerically pure forms of 1‐(2‐methoxy‐1‐naphthyl)‐ and 1‐(2,3‐dimethoxy‐1‐naphthyl)‐2‐methylisoquinolinium tetrafluoroborates (DA and D′A) were prepared, and their UV–vis and CD spectra were compared. The donor–acceptor interaction was apparent from the absorption...
The electronic circular dichroism (CD) spectra were recorded for three diastereomeric eclipsed–staggered pairs of charge‐transfer cyclophanes with different substituents, i.e., (4Rp;12Rp)‐ and (4Sp;12Rp)‐12,15‐dimethoxy[2.2]paracyclophane‐4,7‐dicarboxylic acid derivatives (1a‐c and 2a‐c, where a, b, and c denote methyl ester, carboxylic acid, and carboxylate, respectively). The effects of altering...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.