An unprecedented switching of the second-order nonlinear optical response in aggregate bis(salicylaldiminato)zinc(II) Schiff-base complexes |
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| Authors: | Di Bella Santo Oliveri Ivan Pietro Colombo Alessia Dragonetti Claudia Righetto Stefania Roberto Dominique |
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| Institution: | Dipartimento di Scienze Chimiche, Università di Catania, I-95125 Catania, Italy. sdibella@unict.it |
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| Abstract: | A luminescent bis(salicylaldiminato)zinc(II) Schiff-base complex, 1, is characterized by a concentration dependent second-order nonlinear optical response, related to the degree of aggregation of the complex in a dichloromethane solution. The formation of the monomeric adduct, by addition of a Lewis base, such as pyridine, to concentrated solutions of 1, leads to a switch-on of the quadratic hyperpolarizability. This represents an unprecedented mode of NLO switching in molecular materials. |
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