两种半乳糖醇氯化钆配合物的制备与表征

与羟基配位是金属离子的一种重要的存在形式. 我们得到了两种半乳糖醇氯化钆配合物, 其中一种为金属离子与配体为2:1的配合物,钆离子与半乳糖醇的三个羟基及六个水分子配位, 其它水分子以结晶水的形式存在, 氯离子不参加配位;另一种配合物根据红外, 元素分析, 差热热重, 远红外以及太赫兹光谱推测可能是钆离子与两个半乳糖醇分子的六个羟基以及三个水分子配位, 形成1:1配合物. 实验结果说明半乳糖醇与稀土离子之间可以形成多种配合物, 金属离子与糖的羟基存在着复杂的相互作用.     

石墨炉原子吸收光谱中GdCl3,Gd（NO3）3基体的背景吸收

研究了石墨炉原子吸收光谱中ＧｄＣｌ３、Ｇｄ（ＮＯ３）３基体的背影吸收影响。背景吸收波长特性的研究表明，ＧｄＣｌ３和Ｇｄ（ＮＯ３）３的背景吸收都具有明显的波长特性。蒸发行为研究表明ＧｄＣｌ３的背景吸收主要来自ＧｄＣｌ３的分子蒸气，Ｇｄ（ＮＯ３）３的背景吸收主要来自ＮＯ。钆基体的背景吸收峰高与灰化有关，ＧｄＣｌ３背上曲线轮廓与原子化温度和原子化方式有关。Ｇｄ（ＮＯ３）３的背景吸收远小于ＧｄＣｌ３。本文     

FTIR and optical properties for irradiated PVA–GdCl3 and its possible use in dosimetry

There are various chemical and physical changes caused when polymers are exposed to a source of radiation. In the present work, four films of polyvinyl alcohol (PVA) doped with 2, 4, 6 and 8 wt% of gadolinium chloride (GdCl₃) have been irradiated by low-dose fast neutrons using Am-241/Be-9. The structural properties of the synthesized films have been investigated pre- and post-irradiation on the basis of Fourier transform infrared technique. The optical properties of the PVA–GdCl₃ films have been investigated for doses up to 1.2 KGy. The energy gap of the synthesized films showed a neutron dose dependence and was decreased by 0.81 eV after exposing to 1.2 kGy. At a wavelength of 1000 nm, the refractive index of the PVA doped with 8 wt% GdCl₃ has been increased by nearly 16%. The results suggested the possible use of PVA--GdCl₃ as a dosimeter for the neutron beams.