Multiple Emission of Phosphonium Fluorophores Harnessed by the Pathways of Photoinduced Counterion Migration

Andrey Belyaev*, Bo-Kang Su, Yu-Hsuan Cheng, Zong-Ying Liu, Nasrulla Majid Khan, Antti J. Karttunen*, Pi-Tai Chou*, Igor O. Koshevoy*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

11 Sitaatiot (Scopus)
101 Lataukset (Pure)

Abstrakti

In the emerging field of intramolecular charge transfer induced counterion migration, we report the new insights into photophysical features of luminescent donor–acceptor phosphonium dyes (D−π−)nA+[X] (π=−(C6H4)x−). The unique connectivity of the phosphorus atom affords multipolar molecules with a variable number of arms and the electronic properties of the acceptor group. In the ion-paired form, the transition from dipolar to quadrupolar configuration enhances the low energy migration-induced band by providing the additional pathways for anion motion. The multipolar architecture, adjustable lengths of the π-spacers and the nature of counterions allow for efficient tuning of the emission and achieving nearly pure white light with quantum yields around 30 %. The methyl substituent at the phosphorus atom reduces the rate of ion migration and suppresses the red shifted bands, simultaneously improving total emission intensity. The results unveil the harnessing of the multiple emission of phosphonium fluorophores by anion migration via structure and branching of donor–acceptor arms.

AlkuperäiskieliEnglanti
Artikkelie202115690
Sivumäärä10
JulkaisuAngewandte Chemie - International Edition
Vuosikerta61
Numero19
Varhainen verkossa julkaisun päivämäärä24 helmik. 2022
DOI - pysyväislinkit
TilaJulkaistu - 2 toukok. 2022
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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