芴酮-芳香醛-双腙的合成、晶体结构及光限幅性能

Synthesis,crystal structure and optical limiting properties of fluorenone-aromatic aldehyde-dihydrazone

合成了4种新的标题化合物,通过红外光谱、核磁共振、质谱及元素分析对它们结构进行了表征,并通过单晶X射线衍射确定了芴酮-N,N-二甲基苯甲醛-双腙的结构,结果表明该晶体为正交晶系,属Pbca空间群,具有较大的共轭体系和良好的平面性。采用Z-扫描技术测试了4种化合物的光限幅性能,研究表明其中3种化合物对532nm激光有良好的光限幅性能,其双光子吸收截面分别为3.19×10-46、3.96×10-46和4.31×10-46cm4.s/photon。

Four novel organic fluorenone-aromatic aldehyde-dihydrazone compounds were synthesized and characterized by IR,1HNMR,MS and elemental analysis.The structure of fluorenone-4-（N-dimethylamino）benzaldehyde-dihydrazone was confirmed by the single crystal X-ray diffraction analysis.The results showed that the molecule fluorenone-4-（N-dimethylamino）benzaldehyde-dihydrazone with orthorhombic crystal system and Pbca space group had high delocalization of π electrons and good planarity.Optical limiting capability of these compounds was measured by means of the Z-scan technique.The test results showed that compounds fluorenone-benzaldehyde-dihydrazone,fluorenone-4-（methyl-oxide）benzaldehyde-dihydrazone and fluorenone-4-（N-dimethylamino）benzaldehyde-dihydrazone had good optical limiting ability to 532 nm wavelength light of Nd：YAG pumping laser and their two photon absorption cross-section σ was 3.19×10^-46 cm4·s/photon,3.96×10^-46 cm4·s/photon and 4.31×10^-46 cm^4·s/photon,respectively.