In:
Chemistry – A European Journal, Wiley, Vol. 27, No. 37 ( 2021-07-02), p. 9535-9541
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.202100906
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
1478547-X
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