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以ZnSO4·7H2O和苯并咪唑-5,6-二羧酸为原料,采用水热法合成了一种新型的锌配合物{\[Zn(H2-bidc)2(H2O)4]·(H2O)4}n[1 (CCDC: 1007038), H3-bidc=苯并咪唑-5,6-羧酸],产率48%,其结构经IR,元素分析和X-射线单晶衍射表征。结果表明:1属正交晶系,Pnnm空间群,晶胞参数a=9.6451(19) , b=19.459(4) , c=6.6895(13) ,α=β=γ=90°, V=1255.5(4) 3, Dc=1.634 g·cm-3, Z=8。采用FL和TGA研究了1的性能。结果表明:1具有一定的热稳定性,最大发射峰位于420 nm和416 nm, 1的荧光发射属于发射配体荧光。 相似文献
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Lithium ion batteries are important electrochemical energy storage devices for consumer electronics and the most promising candidates for electrical/hybrid vehicles. The surface chemistry influences the performance of the batteries significantly. In this short review, the evolution of the surface structure of the cathode materials at different states of the pristine, storage and electrochemical reactions are summarized. The main methods for the surface modification are also introduced. 相似文献
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从1872年开始,克莱因(F·Klein)在题为<近代几何研究的比较评述>的演讲中,提出了用变换观点来看待几何学,后来称之为"Erlanger rro-gramm"(爱尔兰根纲领).几何变换思想就成为初等几何的现代数学思想. 相似文献
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