Synthesis, characterization and optical properties of merocyanines derived from malononitrile dimer
- 作者：Silvia Alí ; as ; Raquel Andreu ; Miguel Angel Cerdá ; n ; Santiago Franco ; Javier Garí ; n ; Jesú ; s Orduna ; Pilar Romero ; Belé ; n Villacampa
- 关键词：Malononitrile dimer ; Merocyanines ; Proaromaticity ; Nonlinear optics
- 刊名：Tetrahedron Letters
- 出版年：2007
- 期刊代码：109_00404039
- 类别：ch
- 出版时间：10 September 2007
- 卷：48
- 期：37
- 页码：6539-6542
- 文件大小：142 K
摘要
The reaction between malononitrile dimer and 1,3-dithiole-derived polyenals affords push–pull systems with (Z)-geometry around the newly formed C
C bond. In one instance, an unexpected shortening of the merocyanine chain takes place. These push–pull derivatives have weakly alternated structures and moderate optical nonlinearities, which can be modified by functionalization of the amino group.