以Na2S、Na2 SnO3、稀盐酸及水合肼为原料成功合成了锡硫化合物(Metal ehalcogenidometalates,MCCs).该化合物在离子溶液中解离出SnS44或Sn2 S64,这两种低聚阴离子因其电子空间结构特殊而具有配位作用,故能置换CdSe量子点表面原有的长链有机配体,从而实现量子点从有机相到无机相的转移.配体交换后的量子点可以较好地分散在水、氨水、水合肼和二甲亚砜等一系列极性溶剂中.我们分别用透射电子显微镜(TEM)、紫外吸收光谱(UV)、荧光发射光谱(PL)和红外吸收光谱(FTIR)表征了CdSe的分散性、光学性质及表面配体情况.
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