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本文对所合成的具有 [(PO4 ) 2 Mo5O1 5]簇骼的 3种新颖的有机 磷钼酸盐簇合物(NH3CH2 CH2 NH3) 2 5[(PO4 ) (HPO4 )Mo5O1 5]·7 5H2 O (Ⅰ ) ,(H3NCH2 CH2 NH3) 3·[(PO4 ) 2 Mo5O1 5]·3H2 O (Ⅱ )和(H3NCH2 CH2 NH3) 2 ·[Cu(en) ][(PO4 ) 2 Mo5O1 5]·5H2 O (Ⅲ )用FTIR ,NIR Raman ,紫外 可见漫反射光谱 (UV VisDRS)和荧光光谱等研究手段 ,对其进行光谱研究 ,探讨其结构和性能的关系。在这些化合物中 ,化合物Ⅰ和Ⅱ具有孤立的 [(PO4 ) 2 Mo5O1 5]簇骼基元 ,而化合物Ⅲ的 [(PO4 ) 2 Mo5O1 5]簇骼基元是由 [Cuen]基团桥联成链 ;磷钼酸盐的特征振动频率和这些化合物的结构相关 ;UV VisDRS显示 ,在 2 0 0和 2 6 0nm左右有两个杂多化合物的特征吸收谱带 ;化合物的稳态荧光光谱中 ,观察到以 2 4 0nm激发 ,在大约 4 0 0nm附近出现的由金属氧簇Oμ→Mo跃迁激发所引起的较强的发射峰 ,在化合物 (Ⅲ )中 ,还观察到通过 [Cuen]的荷移跃迁的以 5 70nm激发所产生的 6 0 4nm的发射峰。
In this paper, three kinds of novel organic phosphomolybdate clusters (NH3CH2CH2NH3) 2 5 [(PO4) (HPO4) Mo5O1 5] 7 5H2O with [(PO4) 2 Mo5O1 5] (PO 4) 2 Mo 5 O 1 5] · 3H 2 O (II) and (H3NCH 2 CH 2 NH 3) 2 · [Cu (en)] [(PO 4) 2 Mo 5 O 1 5] · 5H 2 O (Ⅲ) Spectroscopic studies were carried out using FTIR, NIR Raman, UV VisDRS and fluorescence spectroscopy, and the relationship between structure and properties was investigated. Of these compounds, compounds I and II have isolated [(PO4) 2 Mo5O1 5] cluster motifs and [(PO4) 2 Mo5O1 5] cluster motifs of compound III are bridged by [Cuen] groups The characteristic vibrational frequencies of phosphomolybdates were related to the structures of these compounds. The UV VisDRS showed that there were two characteristic absorption bands of two heteropoly compounds around 200 and 260 nm. The steady state fluorescence spectra of the compounds , A strong emission peak due to the excitation transition of the metal oxygen cluster Oμ → Mo appearing around about 400 nm was observed at 240 nm excitation. In the compound (III), a strong emission peak due to [Cuen] The emission peak at 600 nm generated by the 5 70 nm excitation of the charge-transfer transition.