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Ultrafast Third-Order Nonlinear Optical Response of Organic-Inorganic Hybrid Materials (C19H25N2)7Hn [P2Mo18-n Vn O62] 下载免费PDF全文
We have measured the third-order optical nonlinearity of the organic-inorganic hybrid materials of supermolecules (C19H25N2)7Hn [P2Mo18-n Vn O62] (n = 1, 2, 4, 5) and their reactants (C19H25N2) Br and Hn 6[P2Mo18-n Vn O62] by using the ultrafast optical Kerr effect at 830 nm wavelength, with time resolution of 115fs. By comparing the γ values of the supermolecules and their reactants, it is concluded that the charge-transfer eahanced remarkably the third-order optical nonlinearity of the compounds. With the increment of the number of the vanadium atoms,the electron distribution changed strongly and the γ value decreased dramatically. 相似文献
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采用紫外-可见光谱和荧光光谱滴定方法研究了钌(II)配合物[Ru(bpy)(H2iip)2](ClO4)2 [bpy=2,2’-联吡啶, H2iip=2-吲哚基-咪唑并[4,5-f][1,10]-邻菲罗啉]在DMSO溶液中对卤素离子的识别性质. 结果表明该配合物能比色和荧光双重光谱高选择性识别F-. 相似文献
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一个新型钌(Ⅱ)配合物的合成、表征与DNA的键合及溶剂变色性质 总被引:2,自引:0,他引:2
合成和表征了1个新的钌(Ⅱ)配合物[Ru(bpy)2(dpapz)](ClO4)2,其中bpy=2,2'-联吡啶,dpapz=联吡啶并[3,2-a:2,'3-'c]-6-氮杂-吩嗪.通过紫外可见光谱、荧光光谱、与溴化乙锭的竞争键合实验和粘度测量研究了该配合物与小牛胸腺DNA的键合性质,并研究了该配合物的紫外可见光谱和荧光光谱的溶剂变色性质.结果表明,该配合物是具有键合常数Kb=6.9×105L/mol(50mmol/LNaCl)的DNA嵌入键合试剂和优良的荧光溶剂传感分子. 相似文献
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Low-Dimensional Forest-Like and Desert-Like Fractal Patterns Formed in a DDAN Molecular System 总被引:2,自引:0,他引:2 下载免费PDF全文
Two kinds of forest-like and desert-like patterns are formed by thermal evaporation of 4-dicyanovinyl-N, Ndimethylamino-1-naphthalene (DDAN) onto SiO2 substrates. Based on thermal kinetics of the molecules on the substrate the transformation between the forest and desert patterns is due to two factors. The first one is the diffusion length, which is related to the deposition rate, the diffusion potential energy barrier and the substrate temperature. The second one is the strong interaction between the two polarity chemical groups of the molecules, which is beneficial to the formation of branches. Totally different patterns are also found on mica substrates, and are attributed to the anisotropic diffusion and the stronger interaction between DDAN molecules and the mica surface. 相似文献
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稀土钼钒磷杂多酸半菁盐的合成,表征和催化性能 总被引:2,自引:0,他引:2
用降解法首次制得Dawson结构的稀土钼钒磷酸钾。通过它们与溴化(E)-1-丁基-4-[2-(4-二甲氨基苯)乙烯基]吡啶反应,制备了种未见文献报道的具有下列组成的新型稀土杂多配合物的有机衍生物,研究了其红外、紫外,可见光谱、X射线光电子能谱、X射线粉末衍射及热重-差热谱,以镧配合物为催化剂,对乙酸与正丁醇、异戊醇的酯化反应进行了初步研究。 相似文献
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合成了一种含咔唑基团的新颖配合物Re(CO)_3CLL[L=1-乙基-2-(N-乙基-咔唑 并-4-)咪唑并[4.5-f]1,10-邻菲咯啉],通过元素分析、红外光谱、紫外光谱、~1H NMR、荧光光谱和循环伏安学对其进行了表征,制备了基于真空沉积膜的双层电致 发光器件:ITO/TPD (30 nm)/Re(Co)_3CLL (10 nm)/Mg_(0.9)Ag_(0.1) (110 nm) /Ag(60 nm)该器件启动电压为5V,在电压为9V时达到最大亮度113cd/m~2,发出桔 红色的光。 相似文献
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合成了一个新的Ru(II)配合物[Ru(bpy)2(H2iip)](ClO4)2•5H2O [bpy=2,2'-联吡啶, H2iip=2-吲哚基-咪唑并[4,5-ƒ][1,10]-邻菲罗啉]. 通过酸碱滴定发射光谱测定了该配合物的表观电离常数; 用紫外可见光谱、荧光光谱、稳态荧光淬灭、溴化乙锭竞争键合、粘度测量和DNA裂解实验研究了配合物与DNA的相互作用性质. 结果表明配合物以经典的插入模式与DNA键合, 键合常数Kb=(5.97±0.27)×105 mol-1•L (50 mmol/L NaCl). 相似文献
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双偶极半菁衍生物/H4SiW12O40自组装多层膜的研究 总被引:3,自引:0,他引:3
通过交替吸附H_4SiW_(12)O_(40)和双偶极半菁衍生物制备了一个新颖的无机- 有机杂化自组装多层膜。紫外可见光谱和X射线衍射研究证实了半菁衍生物 /H_4SiW_(12)O_(40)多层膜可被均匀沉积厚达至少12层,具有平均膜厚5.3nm(半菁 阳离子层加SiW_(12)O_(40)~(4-)层)的二维有序结构,膜中半菁衍生物与H_4SiW_ (12)O_(40)间发生了较强的电荷转移作用。循环伏安研究表明,薄膜具有较好的电 化学活性。 相似文献