排序方式: 共有68条查询结果,搜索用时 31 毫秒
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在磺化金属萘酞菁的荧光光谱和电子吸收光谱的Q谱带上观察到激基缔合物的荧光光谱峰和基态聚集物的吸收光谱峰。荧光光谱和吸收光谱实验说明 ,溶液中聚体分子和单体分子同时存在 ;聚体放出或吸收光子后都解离为单体 ;在荧光光谱中金属萘酞菁的激基缔合物荧光峰相对于单体荧光峰发生红移 ,在吸收光谱中金属萘酞菁基态聚集体的吸收峰相对于单体吸收峰发生蓝移 ,聚集体的荧光光谱和吸收光谱有镜像对称关系。磺化萘酞菁钴浓度较大时 ,其荧光光谱的猝灭较大。 相似文献
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Two novel anthracene derivatives containing 4-vinylpyridine (FPEA) and 2-vinylpyridine (TPEA) poly(methyl methacrylate) films are prepared on quartz glass substrates. Their nonlinear absorption properties are investigated by using a 120-fs, 800-nm Ti:sapphire femtosecond pulsed laser operating at a 1-kHz repetition rate. The unique nonlinear absorption properties of these new compounds are observed by utilizing a Z-scan system. These two-photon absorption (TPA) properties are proven by the two-photon fluorescence excited at 800 nm. The FPEA and TPEA films have nonlinear TPA coefficients of 0.164 and 0.148 cm/GW and the TPA cross sections of 3.345 × 10-48 and 3.081 × 10-48 cm4 ·s/photon, respectively. The influence of the chemical structures on the nonlinear TPA properties of the compounds is also discussed. The highly nonlinear TPA activities of the films implied that the new anthracene derivatives are suitable materials with promising applications in super-high-density three-dimensional data storage and nano- or microstructure fabrication. 相似文献
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α-异噁唑偶氮基-β-二酮类衍生物及其互变异构体的光谱 总被引:1,自引:0,他引:1
研究了5种新型的具有不同结构的aα-异噁唑偶氮基-β-二酮类衍生物的红外光谱和紫外光谱,讨论了它们的酮式-烯醇式以及偶氮式.腙式之间的互变异构化现象。结果表明,所有化合物无论以固体形式或在溶液中均以腙式二酮体和偶氮式烯醇体的混合形式存在。各化合物的紫外吸收谱均呈双峰状,峰值分别处于246~262nm和326~339nm之间,其中,高波长吸收峰的强度明显高于低波长吸收峰强度,说明了各化合物中偶氮式烯醇体形式均多于腙式二酮体形式,其原因是由于各化合物中偶氮式烯醇体的异构体较多,且易以分子内氢键形式形成六元环,有利于结构稳定。 相似文献
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Green-Light Static Rewritable Optical Storage Properties of a Novel CuTCNQ Derivative Thin Film 下载免费PDF全文
A novel charge-transfer complex film: copper-(n-propyl ester 7,7,8,8- tetracyanoquinodimethane-2,5-ylene-(3-propionic acid)) (Cu-TCNQ(C2H4 COOC3H7)2 ) was prepared by spin-coating. Absorption spectra, green-light (514.5nm) static rewritable optical recording properties and rewritable mechanism of this film were studied.The results show that there are two strong absorption peaks at 388nm and 675nm, which can be assigned to electronic transitions in anion radical TCNQ( C2H4 COOC3H7 )2^-. Green-fight optical storage experimental results of this film were as follows: write-in power was 9mW, pulse duration was 80ns; erasing power was 4mW, pulse duration was 500ns; the reflectivity contrast C ≥ 15%; number of write-erase cycles N ≥ 100. It is found that the realization of rewritable optical storage of the Cu-TCNQ(C2H4COOCsH7)2 film is related to the reversible changes of the optical properties, which is caused by the reversible charge transfer between copper and n-propyl ester 7, 7,8,8- tetracyanoquinodimethane-2,5-ylene-(3-propionic acid) in the complex through inducement of laser irradiation. 相似文献
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采用无金属四氮杂卟啉与金属盐回流的方法合成了2种四叔丁基四氮杂卟啉配合物,其中四叔丁基四氮杂卟啉铅(II)配合物未见文献报道。研究了该2种配合物及其配体的电子吸收光谱行为、热稳定性及在532 nm对8 ns激光的光限幅特性。结果表明:该类配合物的Q带的最大吸收峰值λmax在570~630 nm之间,B带的最大吸收峰值λmax在330~350 nm之间,随中心金属离子不同,Q带吸收峰位置有明显差异;配合物在氮气气氛中的起始分解温度大于250 ℃,其在热重图上的失重过程对应着4个取代基(-C(CH3)3)的脱去,共轭大环在500 ℃以下没有分解;它们的光限幅机制属于激发三重态的反饱和吸收(RSA),其中四氮杂卟啉铅配合物具有更强的光限幅效应,这与铅的重原子效应有关。 相似文献
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应用Z扫描技术,在波长为532nm、脉宽为8ns条件下,对一种新型亚酞菁配合物三-α-(2,4-二甲基-3-戊氧基)溴硼亚酞菁的三阶非线性光学特性进行了研究,结果发现,该新化合物有较强的反饱和吸收(β=3.7×10-10 m/W)效应和非线性自聚焦折射效应(n2=7.2×10-11esu),其三阶非线性极化率χ(3)=1.1×10-11esu.分析了溴硼亚酞菁配合物特殊的锥形分子结构和重原子溴的轴向配位等因素对其三阶非线性光学性质的重要影响.
关键词:
亚酞菁
Z扫描
三阶光学非线性 相似文献
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