@article{oai:nagasaki-u.repo.nii.ac.jp:00000952,
 author = {Horiuchi, Shinnosuke and Matsuo, Chiharu and Sakuda, Eri and Arikawa, Yasuhiro and Clever, Guido H. and Umakoshi, Keisuke},
 issue = {25},
 journal = {Dalton Transactions},
 month = {May},
 note = {Understanding of encapsulation processes in confined inner spaces of self-assembled hosts is important for the rational creation of supramolecular systems showing unusual reactivities and physical properties through molecular recognition. Herein we report the formation of luminescent supramolecular host-guest complexes consisting of a hydrogen-bonded resorcin[4]arene hexameric capsule and a variety of emissive Ir complex salts. The Ir complexes, accompanied by small counter anions (Cl-, Br-, NO2-, I- and NO3-), are trapped effectively to show large encapsulation-induced emission enhancement (EIEE) behavior, while Ir complexes having large counter anions (ClO4-, PF6- and OTf-) are not stabilized within the capsule, suggesting that the Ir complex cation is trapped together with its counter anion to form an ion-pair in the capsule. Hydrogen-bonding capabilities of the counter anions also contribute to stabilize host-guest association, because the counter anions trapped within the capsule were in contact with the hydrophilic surfaces of the capsule., Dalton transactions, 49(25), pp.8472-8477; 2020},
 pages = {8472--8477},
 title = {Anion-mediated encapsulation-induced emission enhancement of an IrIII complex within a resorcin[4]arene hexameric capsule},
 volume = {49},
 year = {2020}
}