Projekteja vuodessa
Abstrakti
Crystalline diphosphonium iodides [MeR2P-spacer-R2Me]I with phenylene (1, 2), naphthalene (3, 4), biphenyl (5) and anthracene (6) as aromatic spacers, are photoemissive under ambient conditions. The emission colors (λem values from 550 to 880 nm) and intensities (Φem reaching 0.75) are defined by the composition and substitution geometry of the central conjugated chromophore motif, and the anion-π interactions. Time-resolved and variable-temperature luminescence studies suggest phosphorescence for all the titled compounds, which demonstrate observed lifetimes of 0.46–92.23 μs at 297 K. Radiative rate constants kr as high as 2.8×105 s−1 deduced for salts 1–3 were assigned to strong spin-orbit coupling enhanced by an external heavy atom effect arising from the anion-π charge-transfer character of the triplet excited state. These rates of anomalously fast metal-free phosphorescence are comparable to those of transition metal complexes and organic luminophores that utilize triplet excitons via a thermally activated delayed fluorescence mechanism, making such ionic luminophores a new paradigm for the design of photofunctional and responsive molecular materials.
Alkuperäiskieli | Englanti |
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Artikkeli | e202305108 |
Sivumäärä | 9 |
Julkaisu | Angewandte Chemie - International Edition |
Vuosikerta | 62 |
Numero | 36 |
Varhainen verkossa julkaisun päivämäärä | 16 kesäk. 2023 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 4 syysk. 2023 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Sormenjälki
Sukella tutkimusaiheisiin 'Fast and Tunable Phosphorescence from Organic Ionic Crystals'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Tietoaineistot
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CCDC 2206830: Experimental Crystal Structure Determination
Partanen, I. (Creator), Al-Saedy, O. (Creator), Eskelinen, T. (Creator), Karttunen, A. J. (Creator), Saarinen, J. J. (Creator), Mrózek, O. (Creator), Steffen, A. (Creator), Belyaev, A. (Creator), Chou, P.-T. (Creator) & Koshevoy, I. O. (Creator), Cambridge Crystallographic Data Centre , 2023
DOI - pysyväislinkki: 10.5517/ccdc.csd.cc2d2d2z, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc2d2d2z&sid=DataCite
Tietoaineisto: Dataset
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CCDC 2206828: Experimental Crystal Structure Determination
Partanen, I. (Creator), Al-Saedy, O. (Creator), Eskelinen, T. (Creator), Karttunen, A. J. (Creator), Saarinen, J. J. (Creator), Mrózek, O. (Creator), Steffen, A. (Creator), Belyaev, A. (Creator), Chou, P.-T. (Creator) & Koshevoy, I. O. (Creator), Cambridge Crystallographic Data Centre , 2023
DOI - pysyväislinkki: 10.5517/ccdc.csd.cc2d2d0x, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc2d2d0x&sid=DataCite
Tietoaineisto: Dataset
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CCDC 2206827: Experimental Crystal Structure Determination
Partanen, I. (Creator), Al-Saedy, O. (Creator), Eskelinen, T. (Creator), Karttunen, A. J. (Creator), Saarinen, J. J. (Creator), Mrózek, O. (Creator), Steffen, A. (Creator), Belyaev, A. (Creator), Chou, P.-T. (Creator) & Koshevoy, I. O. (Creator), Cambridge Crystallographic Data Centre , 2023
DOI - pysyväislinkki: 10.5517/ccdc.csd.cc2d2czv, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc2d2czv&sid=DataCite
Tietoaineisto: Dataset
Projektit
- 1 Aktiivinen
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LUMICOIN: Optical and photophysical properties of luminescent coinage-metal compounds
Karttunen, A. (Vastuullinen tutkija), Albrecht, E. (Projektin jäsen), Eklund, K. (Projektin jäsen) & Eskelinen, T. (Projektin jäsen)
01/09/2021 → 31/08/2025
Projekti: Academy of Finland: Other research funding