三取代Keggin结构杂多化合物的相转移化学研究  

Phase Transfer Chemical Research of Trisubstituted Keggin-Type Heteropoly Compounds

作　　者：黄如丹[1] 张淑云[1] 王恩波[1] 余新武 毕丽华[1] 沈恩洪[1] 

机构地区：[1]东北师范大学化学系

出　　处：《东北师大学报（自然科学版）》1998年第4期101-104,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：利用相转移试剂四庚基溴化铵，将含过渡金属三取代Ｋｅｇｇｉｎ结构杂多钨酸盐〔ＸＷ９Ｏ３７Ｚ３（Ｈ２Ｏ）３〕ｎ－（Ｘ＝Ｇａ；Ｓｉ；Ｚ＝Ｃｏ，Ｍｎ，Ｎｉ，Ｃｕ，Ｃｒ；ｎ＝４～１１），从水相转移到非极性溶剂有机相苯中，并根据电子光谱、红外光谱的变化，进一步考察了它们在有机相苯中的配位水脱去，形成配位不饱和杂多阴离子的情况，同时详细研究了该类杂多阴离子所含表面配位水与若干无机阴离子及有机配体的取代反应，实验表明杂多阴离子由水相转移到有机相苯后，较易脱去配位水形成溶剂配位不饱和离子，当加入Ｌｅｗｉｓ碱时，可迅速恢复饱和配位．杂多阴离子的表面配位水分子也易被若干无机阴离子取代，取代反应发生后溶液颜色常发生明显变化，并伴随沉淀现象发生．With the aid of phase transfer agent, tetraheptylammonium bromide, trisubstituted Keggin type heteropoly compounds containing transition metal. XW 9O 37 Z 3(H 2O) 3 n- (X=Ga,Si;Z=Co,Mn,Ni,Cu,Cr; n =4～11),can be transferred from aqueous solution to the non-polar solvent(benzene). The loss of coordinative water molecules was extensively examined by UV Vis and IR. At the meantime, researched the substitution reactions of with inorganic anions and organic ligands. The experiments show that after the heteropoly anions are transferred from aqueous solution to benzene, it is very easy for them to remove coordinative water molecules and form unsaturated anions. When Lewis bases are added, they can restore their saturated structure. Coordinative water molecules are easily subastituted by a lot of inorganic anions and organie ligands. After the substitution reactions, the color of the solutions often have significant change and also with precipitation

关 键 词：杂多化合物 KEGGIN结构 相转移 取代反应 

分 类 号：O641.4[理学—物理化学]