Effective and efficient photoluminescence of salicylate-ligating terbium(III) clusters stabilized by multiple phenyl-phenyl interactions.
A luminescent nonanuclear terbium(III) hydroxo cluster, Tb(9)(Hesa)(16)(mu-OH)(10)(NO(3)) (Hesa: hexyl salicylate), stabilized by unique two-way phenyl ring interactions, pi-pi stackings (d = 3.482-3.599 A) and C-H-pi interactions (d = 2.75-3.03 A) between adjacent pairs of salicylates, was structurally characterized based on X-ray analysis, and the favourable absorption change and efficient photoluminescent characteristic were rationalized as being due to J-type pi-pi stackings, which are dramatically enhanced by hexyl groups in hexyl salicylate ligands.
Manseki
Kazuhiro
K
Center for Advanced Science and Innovation, Osaka University, 2-1, Yamada-oka, Suita, Osaka 565-0871, Japan. k-manseki@casi.osaka-u.ac.jp
Yanagida
Shozo
S