Chiroptical and catalytic properties of doubly binaphthyl-strapped chiral porphyrins Chihiro Maeda,*a Kanae Ogawa,a Kosuke Sadanaga,a Kazuto Takaishia and Tadashi Ema*a Author affiliations * Corresponding authors a Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Japan E-mail: cmaeda@okayama-u.ac.jp, ema@cc.okayama-u.ac.jp Abstract Doubly (R)-binaphthyl-strapped porphyrins with methylene chains were synthesized.