排序方式: 共有43条查询结果,搜索用时 15 毫秒
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Hydrothermal reaction between 5-bromoisophthalic acid (H2BIPA) and Zn(NO3)2·6H2O at the presence of the second ligand of 2-(2-pyridyl)imidazole (Hpyim) yields a new 3D metal-organic coordination polymer [Zn2(OH)(pyim)(BIPA)]n (1),which has been characterized by single-crystal X-ray diffraction,elemental analysis,IR spectrum and thermal analysis. Complex 1 presents an α-Po net with 41263 topology constructed from tetranuclear clusters and displays strong luminescent emission at room temperature. 相似文献
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单异硫氰基3:1不对称酞菁锌的光谱性质研究 总被引:1,自引:0,他引:1
测定了三种含异硫氰基3:1不对称酞菁锌配合物(RO)6(NCS)PcZn(Ⅱ)(R=n-C4 H9;n-C5 H11;n-C10H21)在五种有机溶剂中的电子吸收光谱,研究了取代基和溶剂对吸收光谱的影响和规律。同时测定它们在有机溶剂中的荧光发射光谱,研究了外部取代基、溶剂和浓度对最大发射波长及荧光强度的影响规律,发现此类配合物具有特定的荧光效应,有望成为光动力诊断和治疗的有效光敏剂。 相似文献
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通过扩散系数(C),聚集指数(I),聚集度指标(L)、K值,CA值五种聚集度指标对樱桃虎象甲卵期的空间格局和抽样技术进行了研究。结果表明,樱桃虎象甲卵在林间的分布呈聚集分布,在空间分布型的基础上提出了理论抽样数。 相似文献
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We investigate the absorption spectra, optical constants and thermal decomposition as well as red-light (650nm) static recording properties of three novel nickel-azo dye films based on 4-methylthiazole, beuzothiazole and 6-methylbenzothiazole. Particularly, we obtain the nickel-azo complex film based on 4-methylthiazole, peaking at 562nm and 613nm, with higher refractive index (n = 2.46) and lower extinction coefficient (k = 0.18) at the wavelength 650nm and a sharp threshold of thermal decomposition at 330℃. The results of the static optical recording test of this dye film indicate that high reflectivity contrast of 51% can be observed at a laser writing power of 5.9mW and pulse width of 350ns. These results imply that the nickel-azo complex based on 4-methvlthiazole is a uromising candidate for a recordinz medium of digital versatile disc-recordable. 相似文献
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三维配合物Ni_2(BTEC)(H_2O)_4·2H_2O的合成及其晶体结构 总被引:2,自引:2,他引:0
以1,2,4,5-苯四甲酸(H4BTEC)为原料,用水热法合成了新的三维配合物Ni2(BTEC)(H2O)4·2H2O(1),其结构经IR,元素分析和X-射线单晶衍射表征.1属三斜晶系,P-1空间群,晶胞参数:a=0.691 5(3) nm, b=0.740 2(3) nm, c=1.554 2(7) nm, α=88.344(6)°, β=85.070(6)°, γ=86.594(6)°, V=0.790 9(6) nm3, Z=2, Mr=475.63 g·mol-1, Dc=1.997 g·cm-3, μ=2.457 mm-1, F(000)=484, R1=0.029 2, wR2=0.064 8, S=1.011. 1中Ni原子均处于倒反中心上,与BTEC4-配体的四个羧基上的4个O原子和两个配位水上的2个O原子配位,形成一个畸变的八面体几何构型.H4BTEC完全去质子化,并以μ6-配位方式桥联6个Ni原子,形成罕见的(4,6)-连接点的三维超分子结构,其拓扑类型为(44.62)2(44.610.8). 相似文献
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