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Engineering geometric metamorphosis in {P_(6)M_(2)Mo_(16)O_(73)}-based high-nuclearity metal superclusters: from tetrahedral to square assemblies via topological transformations
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作者 Xiaoyan Zhang Hui Li +2 位作者 Na Xu Xiaodong Liu Xiu-Li Wang 《Inorganic Chemistry Frontiers》 2025年第11期3823-3832,共10页
The synthesis of superclusters is vital for understanding their self-assembly mechanisms,requiring precise control over composition,orientation,and connectivity.The tenets of reticular chemistry afford a systematic ap... The synthesis of superclusters is vital for understanding their self-assembly mechanisms,requiring precise control over composition,orientation,and connectivity.The tenets of reticular chemistry afford a systematic approach to the architectural design and regulation of molecular entities,thereby enabling the fulfillment of preconceived structural objectives.Herein,the strategic introduction of transition metal ions,CoⅡand NiⅡ,has enabled the controlled formation of two novel closely related anionic superclusters based on the{Sr⊂P_(6)M_(2)Mo_(16)O_(73)}clusters:Co_(12)Sr_(4)Mo_(80)P_(36)(1)and Na_(4)Ni_(23)Sr_(4)Mo_(88)P_(52)(2).The former manifests a tetrahedral structure,while the latter,derived from topological transformations of cluster 1,exhibits a unique square geometry.Structural elucidation revealed that the integration of MoV ions in a reduced state,in concert with distinct transition metal ions(CoⅡ and NiⅡ),plays a pivotal role in determining the geometric profiles of these superclusters.Furthermore,clusters 1 and 2 demonstrate efficacy as heterogeneous catalysts,significantly promoting the transformation of methyl phenyl sulfide(MPS)to methyl phenyl sulfoxide(MPSO). 展开更多
关键词 architectural design regulation molecular entitiesthereby reticular chemistry anionic superclust high nuclearity metal superclusters transition metal ionsco fulfillment preconceived structural objectiveshereinthe geometric metamorphosis synthesis superclusters
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“预想论”:现代汉语顺序的认知研究 被引量:21
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作者 鲁川 《世界汉语教学》 CSSCI 北大核心 2005年第1期32-43,共12页
本文尝试从认知的视角用"预想论"来解释现代汉语顺序的理据性.现代汉语呈现明显的"象似性"跟汉族人的认知模式相关.一个简单句(事件)由一个"中枢语块"和若干个"周边语块"构成,汉语句子把"... 本文尝试从认知的视角用"预想论"来解释现代汉语顺序的理据性.现代汉语呈现明显的"象似性"跟汉族人的认知模式相关.一个简单句(事件)由一个"中枢语块"和若干个"周边语块"构成,汉语句子把"预想"的周边语块排在"中枢语块"之前,把"未预想(待晓)"的周边语块排在"中枢语块"之后.文章用"预想论"对汉语研究所关注的问题作了新的解释.建议把"认知模式对比"纳入对外汉语的教材之中. 展开更多
关键词 语块 现代汉语 汉语句子 象似性 理据性 对外汉语 汉语研究 简单句 认知模式 教材
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