open access

https://hdl.handle.net/2115/90156

Effective Photosensitization in Excited-State Equilibrium: Brilliant Luminescence of Tb-III Coordination Polymers Through Ancillary Ligand Modifications

英語

triplet state

2022-10

Wiley-Blackwell

ChemPlusChem

87(10)

e202200151

Molecular photosensitizers provide efficient light-absorbing abilities for photo-functional materials. Herein, effective photosensitization in excited-state equilibrium is demonstrated using five Tb-III coordination polymers. The coordination polymers are composed of Tb-III ions (emission center), hexafluoroacetylacetonato (photosensitizer ligands), and phosphine oxide-based bridges (ancillary ligands). The two types of ligand combinations induces a rigid coordination structure via intermolecular interactions, resulting in high thermal stability (with decomposition temperatures above 300 degrees C). Excited-triplet-state lifetimes of photosensitizer ligands (tau=120-1320 mu s) are strongly dependent on the structure of the ancillary ligands. The photosensitizer with a long excited-triplet-state lifetime (tau >= 1120 mu s) controls the excited state equilibrium between the photosensitizer and Tb-III, allowing the construction of Tb-III coordination polymer with high Tb-III emission quantum yield (>= 70 %).

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Y. Kitagawa, R. Moriake, T. Akama, K. Saito, K. Aikawa, S. Shoji, K. Fushimi, M. Kobayashi, T. Taketsugu, Y. Hasegawa, ChemPlusChem 2022, 87, e202200151, which has been published in final form at https://doi.org/10.1002/cplu.202200151. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

2192-6506