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Host–Guest and Photophysical Behavior of Ti 8 L 12 Cube with Encapsulated [Ti(H 2 O) 6 ] Species
Author(s) -
Zhu BangChang,
Fang WeiHui,
Wang Junhui,
Du Yonghua,
Zhou Tianhua,
Wu Kaifeng,
Zhang Lei,
Zhang Jian
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201802930
Subject(s) - supramolecular chemistry , materials science , crystallography , titanium , spectroscopy , excited state , photocurrent , absorption (acoustics) , ultrafast laser spectroscopy , photoluminescence , cube (algebra) , absorption spectroscopy , photochemistry , chemistry , crystal structure , optoelectronics , physics , atomic physics , optics , mathematics , quantum mechanics , combinatorics , metallurgy , composite material
Abstract Titanium‐based coordination cages could be interesting for both supramolecular and photophysical chemistry. This work reports an unprecedented host–guest system, [Ti(H 2 O) 6 ]@Ti 8 L 12 , which is comprised of the first Ti‐based coordination cube and the unusual titanium aquo species. Due to the abundant intra‐cube O−H⋅⋅⋅O hydrogen bonds, the [Ti(H 2 O) 6 ]@Ti 8 L 12 complex is rather stable both in solid and solution states, confirmed by X‐ray diffraction and ESI‐MS analysis. The encapsulated [Ti(H 2 O) 6 ] species shows influence on the light absorption, photoluminescent, and photocurrent properties. Moreover, ultrafast transient absorption spectroscopy has been applied to study the photodynamics of both free and [Ti(H 2 O) 6 ] guest encapsulated Ti 8 L 12 cube, confirming that the host–guest system produces a slightly longer‐lived excited state. Therefore, this work presents the first [Ti 8 L 12 ] cube with unusual [Ti(H 2 O) 6 ] guest and also provides an interesting supramolecular model for the host–guest photophysical study.