【作者】 陈义平； 张汉辉； 黄长沧； 杨齐瑜； 孙瑞卿；

【Author】 CHEN Yi-ping~1,ZHANG Han-hui~(1,2*),HUANG Chang-cang~1,YANG Qi-yu~1,SUN Rui-qing~1 1.Department of Chemistry,Fuzhou University,Fuzhou 350002,China 2.State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences,Fuzhou 350002,China

【机构】 福州大学化学系； 中国科学院物构所结构化学国家重点实验室；

【摘要】 合成了两种具有含有β-[Mo₈O₂₆]^4-簇阴离子的新型化合物:[H（4,4’-bipy）]₂[K₂Mo₈O₂₆]（Ⅰ）和H₃[NaMo₈O₂₆]（4,4’-bipy）₅（H₂O）₄（Ⅱ）,用FTIR、NIR-Raman、UV-Vis和荧光光谱等研究手段进行光谱研究,探讨其结构与性能的关系。虽然这两个化合物中阴离子类似,都含有β-[Mo₈O₂₆]^4-簇骼基元,但它们与碱金属的连接方式不同,其FTIR和NIR-Raman光谱的特征振动频率与其结构相关;化合物Ⅰ和Ⅱ的UV-Vis光谱显示,在250～300 nm左右有宽的紫外吸收谱带;化合物Ⅰ的稳态荧光光谱观察到分别以350nm激发下在510～575 nm处产生一个宽的发射峰;化合物Ⅱ在325 nm激发下在437 nm处产生一个发射峰。化合物Ⅰ不同温度下稳态固体荧光光谱随着温度的下降,荧光发射强度增强,化合物Ⅰ在不同温度下时间分辨固体荧光光谱,其荧光寿命随着温度的降低而增长。更多还原

【Abstract】 Two compounds of organic molybdate-alkali salt:[H（4,4’-bipy）]₂[K₂Mo₈Q（26）]（I ）and H₃[NaMo₈O₂₆]（4,4’-bipy）₅ （H₂O）₄（Ⅱ）,withβ-[Mo₈O₂₆]^4- anion,have been synthesized.The relationship between their properties and structures was studied by using FTIR,Raman,NIR-Vis and fluorescence.They possess isolatingβ-[Mo₈O₂₆]^4- anion,whose terminal O atoms combine with alkali;The researches of their FTIR and Raman spectra are shown that the vibrational frequencies of the group related to the structure of the materials.In UV-Vis spectra of compound（Ⅰ） and（Ⅱ）,there is characteristic wild peak at 250-300 nm.The fluorescence spectra of compound（Ⅰ） and（Ⅱ） has been studies,it is showed that the wild emission peak is at 510-575 nm excited by 350nm for compound（Ⅰ）,and the emission peak at 437 nm excited by 325nm for compound（Ⅱ）.For compound（Ⅰ）,the intension of emission becomes stronger with decrease of temperature,and so does the fluorescence lifetime.更多还原