Three kinds of chiral cyclic compounds and their mirror‐image isomers are described. The cover was created by using a “kaleidoscope” motif to project the three pairs of enantiomers in the central hexagon. The kaleidoscope is an optical device invented in the 19th century as a result of experiments on polarized light; the word “kaleidoscope”, derived from the Greek kalos “beautiful”, was used to represent the beautiful and circularly polarized luminescent (CPL) molecules. More information can be found in the Research Article by M. Hasegawa, Y. Mazaki, and co‐workers (DOI: 10.1002/chem.202202218).

This cover represents the three kinds of chiral cyclic compounds and their mirror-image isomers described in the paper. The cover was created by using a "kaleidoscope" motif to project the three pairs of enantiomers in the central hexagon. The kaleidoscope (from the Greek kalos "beautiful"), an optical device invented in the 19th century as a result of experiments on polarized light, was used to represent the aesthetically pleasing and circularly polarized luminescent (CPL) molecules. Note that spiral arrows released from the S isomers correspond to right-handed CPL, whereas those from the R isomers correspond to left-handed CPL.

A structurally constrained, double-helical S,C-bridged tetraphenyl-para-phenylenediamine (TPPD) has been synthesized. The stable radical cation of the S,C-bridged TPPD was generated by chemical oxidation, and the electron spin was found to...

Chiral macrocyclic dimers, trimers, and tetramers composed of paraphenylene and tethered binaphthyl were synthesized, and their molecular structures and chiroptical properties were investigated. X-ray analysis and theoretical calculations revealed that multiple twisted molecular structures -dimers, trimers, and tetramers -adopt figure-of-eight, Möbius triangle, and concave rectangle structures, respectively. These homologues have large ɛ values in their UV-vis absorption spectra because of the π-conjugation of the naphthalene-phenylene-naphthalene frameworks. Owing to the shape-persistent ring structure and tethering with À OCH 2 CH 2 OÀ , high fluorescence quantum yields and a relatively high dissymmetry factor g CPL in circularly polarized luminescence (CPL) spectra were achieved. This results in CPL brightness (B CPL ) of over 100, which is greater than that of the conventional organic CPL dye.