conjugation, have been extensively studied vis-à-vis the NLO properties. The change in these properties by virtue of the molecular structure has been elucidated in this work as the structure activity relationship. Optical nonlinearity is studied using ultrafast (100 fs) laser pulses at 800 nm, employing the open aperture Z-scan technique. The compounds exhibit large effective three-photon absorption (3PA)
随着对非线性光学(NLO)应用中有机分子的兴趣不断增长,我们已经基于DA-π-D设计合成了九种新颖的噻吩基查耳酮。为了建立身份,已对这些特征进行了详细描述。在遵循基于设计的综合路线之后,我们集中在两个主要的比较标准上。即二次谐波产生(SHG)和非线性吸收。在这项工作中,已经针对NLO性质广泛研究了吸电子基团,给电子基团和扩展的共轭作用。通过分子结构解释了这些性质的变化,作为结构活性关系。使用开孔Z扫描技术,使用800 nm的超快(100 fs)激光脉冲研究光学非线性。−28 m 3 / W 2。这些观察结果表明,这些化合物具有用于全光学限位和转换装置的潜力。
Design and synthesis of spiro derivatives containing a thiophene ring and evaluation of their Anti-microbial activity
作者:Geethanjali Kanagaraju、AArumugam Thangamani
DOI:10.13005/ojc/300421
日期:2014.12.31
Synthesis of a series of novel spiro pyrrolidines has been accomplished by 1, 3-dipolar cycloaddition reaction of azomethine ylide generated from phenylalanine and isatin with dipolarophiles in good yield. The reaction proceeded with high regio and stereoselectivity. The products have been characterized by elemental analyses and spectroscopic techniques, namely IR, 1H NMR and 13C NMR spectroscopies. Single crystal analysis of compounds 4k 2D-NMR analysis of compound 4k confirmed the structures of spiropyrrolidine derivatives. These compounds were evaluated for their antimicrobial activity. Most of the synthetic compounds exhibited good activity against microorganisms.