微波水热法合成不同维数磷酸锌化合物的研究（英文）

Microwave-Assisted Hydrothermal Synthesis of Zinc Phosphates of Varying Dimensionality

利用微波辅助水热合成的方法,在醋酸锌-磷酸-咪唑-水体系中获得了一维链状磷酸锌,Zn(C_3N_2H_4)HPO4(化合物Ⅰ)和二维层状磷酸锌,Zn_4P_3O_(11)(OH)·3C_3N_2H_4(化合物Ⅱ)。通过单晶X射线衍射分析确定其结构,并利用粉末XRD和SEM对产物进行了进一步的研究。结果表明,两种不同结构、不同维数的化合物,具有相同的构筑单元。当晶化温度较低或反应时间较短时,易得到一维磷酸锌(化合物I);在前驱体溶液的原料配比不变的前提下,提升晶化温度或延长反应时间会得到二维磷酸锌(化合物Ⅱ)。此外,通过控制反应温度和反应时间可以实现化合物Ⅰ到化合物Ⅱ的转变。

By applying microwave-assisted heating approach, a one-dimensional （ 1D ） chained zinc phosphate structure, Zn（ C3 N2H4 ） HPO4 （ Compound I ）,and a two-dimensional （2D） layered zinc phosphate,Zn4P3On （ OH） .3C3N2H4 （ Compound 1 ）,have been obtained in the Zn（ OAc）2-H3 PO4-Imidazole-H2O hydrothermal reaction system. Their structures were deter-mined by single-crystal X-ray difraction and furtlier characterized by powder XRD and SEM analy-sis. The results indicate that the compounds composed of the same construction units possess dif-ferent structures and dimensions. One-dimensional zinc phosphate （ Compound I ） is easilyobtained when the crystallization temperature is low or the reaction time is short. Under the premise of constant raw material ratio of the precursor solution, two-dimensional zinc phosphate （ Compound 1 ） can be obtained by increasing the crystallization temperature or prolonging the reaction time. Inaddition,the transformation of compound I to 1 can be achieved by adjusting the reactiontemperature and reaction time.