title: Metallo supramolecular assemblies of bis-squaraines by allosteric Ca2+ ion binding.
abstract: Alkyl chain tethered bis-squaraines bind to Ca2+ ions through the participation of the negatively charged oxygen of the central cyclobutene moiety to form folded H-type aggregates. The initially formed Ca2+ complex is preorganized to facilitate cooperative allosteric binding of Ca2+, resulting in the formation of extended supramolecular arrays. The electronic absorption, IR, and ESI-MS studies support the formation of metallo supramolecular architectures of the folded H-type dimers of the bis-squaraines.
authors: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka, Japan. yagi@chem.osakafu-u.ac.jp
authors: Shigeyuki
authors: S
authors: Yagi
authors: Yutaka
authors: Y
authors: Hyodo
authors: Masahiko
authors: M
authors: Hirose
authors: Hiroyuki
authors: H
authors: Nakazumi
authors: Yoshiaki
authors: Y
authors: Sakurai
authors: Ayyappanpillai
authors: A
authors: Ajayaghosh