Citation: Zhang, Chi; Song, Yinglin; Xu, Yan; Fun, Hoongkun; Fang, Guangyu; Wang, Yuxiao; Xin, Xinquan (2000). Studies on two interesting microporous polymeric clusters {[Et4N]2[MS4Cu4(CN)4]}n (M = Mo or W) with three-dimensional open frameworks: synthesis, structural characterization, strong optical non-linearities and large optical limiting properties. Journal of the Chemical Society, Dalton Transactions, , pp. 2823-.