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Optical nonlinearity of pentadecylphenoxyl substituted sandwich–type metallophthalocyanines in the presence of Ag–CdSeTe/ZnTeSe nanocrystals: Effects of conjugation and central metals
Dyes and Pigments ( IF 4.1 ) Pub Date : 2018-01-09 , DOI: 10.1016/j.dyepig.2018.01.009
David O. Oluwole , Tebello Nyokong

Novel pentadecylphenoxyl substituted homoleptic sandwich–type metallophthalocyanines: bis (complexes 2 and 4 containing Eu and Dy, respectively) and tris (complexes 3 and 5 containing Eu and Dy, respectively) 2,9,16,23–tetrakis–(3–pentadecylphenoxyl) phthalocyanines and cadmium based (Ag–CdSeTe/ZnTeSe) nanocrystals (NCs) were synthesized. The nonlinear optical (NLO) behavior of the metallophthalocyanines and their composites with NCs were investigated using the open aperture Z–scan technique at excitation wavelength of 532 nm with 10 ns pulse. All of the samples exhibited interesting NLO attributes: among all the sandwich–type complexes, complex 5 afforded the most efficient NLO features accounting for large nonlinear absorption coefficient (βeff) value of 3500 cm/GW and limiting threshold (Ilim) value of 0.43 J cm−2. Overall, the composites of the triple decker sandwich–type complexes with Ag–CdSeTe/ZnTeSe yielded the best NLO characteristics with 3 and 5 accounting for the largest βeff value of 5500 cm/GW and Ilim value of 0.09 J cm−2. The synthesized complexes and their composites with NCs could be viable and efficient NLO absorber due to their interesting NLO activities.



中文翻译:

Ag-CdSeTe / ZnTeSe纳米晶体存在下十五烷基苯氧基取代的夹心型金属酞菁的光学非线性:共轭和中心金属的影响

新颖的十五烷基苯氧基取代的均相夹心型金属酞菁:bis(分别含有Eu和Dy的络合物24)和tris(分别含有Eu和Dy的络合物35)2,9,16,23-四(3-)-十五烷基苯氧基)合成了酞菁和镉基(Ag-CdSeTe / ZnTeSe)纳米晶体(NCs)。使用开孔Z扫描技术在10 ns脉冲的激发波长532 nm下研究了金属酞菁及其与NCs的复合材料的非线性光学(NLO)行为。所有样本均表现出有趣的NLO属性:在所有夹心型复合物中,复合物5由于非线性吸收系数(eff)值为3500 cm / GW,极限阈值(I lim)值为0.43 J cm -2,因此提供了最有效的NLO特性。总体而言,三重双层夹心型配合物的Ag-CdSeTe / ZnTeSe的复合材料中产生最好的NLO特性与35占最大β EFF 5500厘米/ GW和I值LIM 0.09Ĵ厘米值-2。合成的配合物及其与NCs的复合物由于其有趣的NLO活性,可能是可行且有效的NLO吸收剂。

更新日期:2018-01-09
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