Novel NLO-phores with proaromatic donor and acceptor groups |
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| Authors: | Andreu Raquel Garín Javier Orduna Jesús Alcalá Rafael Villacampa Belén |
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| Institution: | Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain. |
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| Abstract: | reaction: see text] Novel D-pi-A NLO-phores based on the 1,3-dithiol-2-ylidene donor and the thiobarbituric acceptor moieties have been prepared. Modification of the length and rigidity of the pi-spacer allows the first systematic study of the second-order nonlinear optical properties of doubly proaromatic merocyanines. The pi-electron donor efficiency of the 1,3-dithiol-2-ylidene group is superior to that of the tetrathiafulvalenyl group. |
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