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Fast electron transfer reactions in porphyrins
Başlık:
Fast electron transfer reactions in porphyrins
Yazar:
Pearce, Barry, author.
ISBN:
9780438083790
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (229 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-08C.
Özet:
Photon induced electron transfer was studied in a series of porphyrins capped by a pyromellitimide acceptor group using transient absorption and fluorescence methods. The forward and back electron transfer rates were obtained as the free energy, solvent, separation, metallation state and conformation were varied systematically. The fall in rate at high exoergicity known as the inverted region was observed as predicted by both classical and quantum theories. The solvent dielectric response is seen to limit the rate of electron transfer in some solutions. Additionally the operation of an electron transfer "switch" is demonstrated. The rotational relaxation of a number of vapour phase aromatics was observed directly using time resolved multiphoton ionisation. The molecules studied behave according to the rigid rotor approximation on the picosecond time scale of the measurements. The experiments were performed using pulses from a lab-built laser spectrometer incorporating a multi-stage dye laser amplifier. The extension of the operating range of the spectrometer to other wavelengths from those used previously is discussed.
Notlar:
School code: 1543
Tüzel Kişi Ek Girişi:
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(686887.1) | 686887-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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