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Ultrafast quenching dynamics of [Re(dmpe)3]2+ beyond the limit of diffusion

Krafft, Mila (2024) Ultrafast quenching dynamics of [Re(dmpe)3]2+ beyond the limit of diffusion. Master's Internship Report, Chemistry.

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The ultrafast charge transfer quenching dynamics of the [Re(dmpe)3] 2+ 2LMCT state by anisole,1-methoxynaphthalene, toluene and benzene are studied with single wavelength femtosecond transient absorption spectroscopy. The quenching rate increases up to 50 vol% of anisole, above which it remains constant. This is considered the close-contact regime where diffusion does not influence charge separation and charge recombination rates. There are indications that the [Re(dmpe)3]2+ excited state undergoes hot charge separation with anisole. In the close-contact regime, the charge separation andcharge recombination kinetics are evaluated for anisole, 1-methoxynaphthalene, toluene and benzene. The charge transfer behaviour of the [Re(dmpe)3]2+ 2LMCT state at high quencher concentrations is explainable with Marcus theory. Charge separation rates follow normal Marcus behavior while charge recombination falls into the inverted Marcus regime.

Item Type: Thesis (Master's Internship Report)
Supervisor name: Tromp, M. and Browne, W.R.
Degree programme: Chemistry
Thesis type: Master's Internship Report
Language: English
Date Deposited: 29 Apr 2024 10:09
Last Modified: 29 Apr 2024 10:09

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