Synthesis and NLO Properties of Chromophores with 1,8-Dimethoxy-9,10-dihydroanthracene and Thiobarbituric acid Moieties

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2008,（3）
• 页码范围: 571-574
• 页数: 4页
• 语种: 英文

摘要

The new chromophore molecules with nonlinear optical (NLO) properties were prepared by Knoevenagel condensation from 4,5-diformyl-1,8-dimethoxy-9,10-dihydroanthracene and thiobarbituric acid derivatives in the presence of piperidine and acetic acid. In these chromophores, the ring-locked triene employed as a conjugation bridge and the thiobarbituric acid moiety was as an electron acceptor in a D-π-A units. The solvatochromism and UV spectra indicate that they have higher second-order nonlinear polarizability μβ values than the corresponding reference compound, without causing a large red shift of the charge transfer band.