Room-Temperature Phosphorescence Emitters Exhibiting Red to Near-Infrared Emission Derived from Intermolecular Charge-Transfer Triplet States of Naphthalenediimide−Halobenzoate Triad Molecules

Toshikazu Ono, Kazuki Kimura, Megumi Ihara, Yuri Yamanaka, Miori Sasaki, Hirotoshi Mori, Yoshio Hisaeda

研究成果: Contribution to journalArticle査読

抄録

Room-temperature phosphorescence (RTP) emitters have attracted significant attention. However, purely organic RTP emitters in red to near-infrared region have not been properly investigated. In this study, a series of naphthalenediimide−halobenzoate-linked molecules are synthesized, one of which exhibits efficient RTP properties, showing red to near-infrared emission in solid and aqueous dispersion. Spectroscopic studies and single-crystal X-ray diffraction analysis have shown that the difference in the stacking modes of compounds affects the optical properties, and the formation of intermolecular charge-transfer complexes of naphthalenediimide−halobenzoate moiety results in a bathochromic shift of absorption and RTP properties. The time-dependent density functional theory calculations showed that the formation of charge-transfer triplet states and the external heavy atom effect of the halogen atom enhance the intersystem crossing between excited singlet and triplet states.

本文言語英語
ページ(範囲)9535-9541
ページ数7
ジャーナルChemistry - A European Journal
27
37
DOI
出版ステータス出版済み - 7 2 2021

All Science Journal Classification (ASJC) codes

  • 触媒
  • 有機化学

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