Aryl, bi-functionalised imidazo[4,5-f]-1,10-phenanthroline ligands and their luminescent rhenium(I) complexes

Bonello, R. Owen; Pitak, Mateusz B.; Tizzard, Graham J.; Coles, Simon J.; Fallis, Ian A.; Pope, Simon J. A.

doi:10.1016/j.poly.2022.116179

Cited by 1 publication

(1 citation statement)

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“…[43] As compared to tune the absorption wavelength by modifying the π-conjugation system, it is still a challenge to tune the magnitude of the triplet state lifetime. Although the common intuitions states that the triplet state lifetime (such as T 1 state) is dependent on the spin orbit coupling (SOC) magnitude, [4,[44][45][46][47][48] the experimental evidence or exemplars to clearly show the trend is rare. For instance, previously elusive triplet state lifetimes trend was observed for a typical visible light-harvesting chromophore, perylenebisimide (PBI).…”

Section: Introductionmentioning

confidence: 99%

Long‐lived Triplet Excited State of Perylenemonoimide (PMI) in a Diimine Pt(II) Bis‐acetylide Complex: Preparation and Study of the Photophysical Property with Transient Spectra

Wang

et al. 2023

Eur J Inorg Chem

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We prepared a N^N Pt(II) bisacetylide complex that has strong absorption of visible light (molar absorption coefficients ϵ=6.7×104 M−1 cm−1 at 570 nm), and the singlet oxygen quantum yield (ΦΔ) is up to 78 %. Femtosecond transient absorption spectra show the intersystem crossing (ISC) of the complex takes 81.8 ps, nanosecond transient absorption spectra show the triplet excited state lifetime is 7.6 μs. Density functional theory (DFT) computation demonstrated that the S1 and T1 states are mainly localized on the perylenemonoimide (PMI) ligands, although the involvement of the Pt(II) centre is noticeable. The complex was used as triplet photosensitizer to generate delayed fluorescence with perylenebisimide (PBI) as the triplet state energy acceptor and emitter, via the intermolecular triplet‐triplet energy transfer (TTET) and triplet‐triplet annihilation (TTA), the delayed fluorescence lifetime is up to 52.5 μs under the experimental conditions.

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Section: Introductionmentioning

confidence: 99%

Long‐lived Triplet Excited State of Perylenemonoimide (PMI) in a Diimine Pt(II) Bis‐acetylide Complex: Preparation and Study of the Photophysical Property with Transient Spectra

Wang

et al. 2023

Eur J Inorg Chem

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show abstract

Aryl, bi-functionalised imidazo[4,5-f]-1,10-phenanthroline ligands and their luminescent rhenium(I) complexes

Cited by 1 publication

References 91 publications

Long‐lived Triplet Excited State of Perylenemonoimide (PMI) in a Diimine Pt(II) Bis‐acetylide Complex: Preparation and Study of the Photophysical Property with Transient Spectra

Long‐lived Triplet Excited State of Perylenemonoimide (PMI) in a Diimine Pt(II) Bis‐acetylide Complex: Preparation and Study of the Photophysical Property with Transient Spectra

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