Jablonski photophysical diagram

Jablonski s diagram, lifetimes of the basic photophysical processes and deexcitation pathways from the lowest-lying excited states of a molecule... 

Figure 3.2 Jablonski diagram for an organic molecule, illustrating excited-state photophysical processes...

The primary photophysical processes occuring in a conjugated molecule can be represented most easily in the Jablonski diagram (Fig. 1). Absorption of a photon by the singlet state So produces an excited singlet state S . In condensed media a very fast relaxation occurs and within several picoseconds the first excited singlet state Si is reached, having a thermal population of its vibrational levels. The radiative lifetime of Si is in the order of nanoseconds. Three main routes are open for deactivation ... 

Figure 2.12 Modified Jablonski diagram illustrating the typical photophysical pathways for a molecule in a condensed medium fluor, fluorescence phos, phosphorescence IC, internal conversion ISC, intersystem crossing VR, vibrational relaxation...

In the rest of this work, individual photophysical processes ensuing photon absorption will be discussed, following the generalized Jablonski diagram shown in Fig. 2. 

The various unimolecular photophysical processes may be envisaged in a rather illuminating way with the help of the Jablonski diagram shown in Fig-... 

Figure 12.1 Modified Jablonski diagram showing photophysical processes that can occur following absorption of a photon of light by a drug molecule. S0 is the ground state S, and S2 are excited singlet states and T, T2, and T3 are excited triplet states.

Fig. 1. Jablonski diagram showing absorption and subsequent photophysical modes of excited state decay. Abbreviations are as follows IC = internal conversion ISC = intersystem crossing VR = vibrational relaxation S = singlet and T = triplet. The subscripts (i.e., 0, 1, and 2) indicate ground, first, and second states, respectively, and the arrows in the boxes indicate electron spins.

FIG. 3 Jablonski energy level diagram for a regular porphyrin, illustrating the photophysical... 

Scheme 52, in an extended Jablonski diagram, summarizes photophysical and photochemical processes that in the case study of ort/io-quinol acetates have been observed. 

Figure 4.1 Jablonski diagram of the important unimolecular photophysical processes of excitation energy dissipation absorption (A), fluorescence (F), phosphorescence (P), internal conversion (IC), intersystem crossing (ISC), vibrational relaxation (VR). Sq is the singlet ground state, Sj and S2 are excited singlet states and Tj is the excited...

Figure 7 Generalized Jablonski diagram depicting relevant photophysical processes in molecular chromophores.

Figure 8 Simplified Jablonski diagram showing the sensitization pathway from the chromophoric hgand L to the lanthanide ion Ln " via the triplet state T of the sensitizer. The k values are the rate constants for aU photophysical phenomena involved. Absorption by the sensitizer, intersystem crossing kisc of the sensitizer, and energy transfer k from the triplet state of the sensitizer to the lanthanide ion (to one of its excited spectroscopic level) resulting in an...

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