ground-state chemistry: excited-state chemistry (singlets):

Ground-state chemistry:

A (S0)Nu E

HOMO

LUMO

A

1. Redox reactivity

(POOR)

2. Exchange

interaction

(Weak and

Forbidden)

3. Nucleophilic

interaction

(o.k.)

4. Electrophilic

interaction

(o.k.)

e-

e-

continuum / electrodes

Excited-state chemistry (singlets):

A* (S1)

1. Redox reactivity

(MUCH HIGHER)

2. Fluorescence

3. Energy transfer

e-

e-

continuum / electrodes

hF

A´ (S0)

FRET

Excited-state chemistry (triplets):

A* (T1)Nu E

HOMO

LUMO

A

1. Redox reactivity

(MUCH HIGHER)

2. Exchange

interaction

(Attractive and

allowed)

3. Nucleophilic

interaction

(Nu = Donor)

4. Electrophilic

interaction

(E = Acc)

e-

e-

continuum / electrodes

Reactions:

A* (T1)Nu E

HOMO

LUMO

A

1. PET

2. Photo:

- cycloaddition

- group abstraction

- cyclization

- rearrangement

3. Photo-

oxidation (PET)

4. Photoreduction

(PET)

e-

e-

continuum / electrodes

First published on the web: 29 May 2008Photochemistry of allyloxybenzophenones: a pseudo-Paternò–Büchi rearrangement accompanied by hydrogen transfer induced 1,5-cyclization

Raúl Pérez-Ruiz, Olga Hinze, Jörg-M. Neudörfl, Dirk Blunk, Helmut Görner and Axel G. Griesbeck,  Photochem. Photobiol. Sci., 2008DOI: 10.1039/b807889k