Quadrupolar dyes

The use of organic dyes with high 2PA cross section in the writing of inorganic structures has been much more limited however, dyes i.l and i.2 (Fig. 21) have been used to write wires of group-10 metals, especially Ag. In this case, donor-substituted dyes, such as q.l, are unsuitable, since the ground state molecule, as well as the excited state, is capable of reducing Ag". However, acceptor-substituted quadrupolar dyes, such as i.l and i.2. 

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