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A helical chain-like organic–inorganic hybrid arsenotungstate with color-tunable photoluminescence†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7dt04608a Hechen Wu 1, 2, 3, 4, 5 , Rong Wan 1, 2, 3, 4, 5 , Yanan Si 1, 2, 3, 4, 5 , Pengtao Ma 1, 2, 3, 4, 5 , Jingping Wang 1, 2, 3, 4, 5 , Jingyang Niu 1, 2, 3, 4, 5
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7dt04608a Hechen Wu 1, 2, 3, 4, 5 , Rong Wan 1, 2, 3, 4, 5 , Yanan Si 1, 2, 3, 4, 5 , Pengtao Ma 1, 2, 3, 4, 5 , Jingping Wang 1, 2, 3, 4, 5 , Jingyang Niu 1, 2, 3, 4, 5
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A 1-D infinite helical chain-like organic–inorganic hybrid arsenotungstate Na4H8[{Pr(H2O)2}2{As2W19O68}{WO2(mal)}2]·24H2O (mal = malate) (1) was prepared, which was characterized by elemental analyses, thermogravimetric (TG) analyses, IR spectroscopy, powder X-ray diffraction (PXRD) and X-ray single-crystal diffraction. Structural characterization revealed that 1 comprises the organo-functionalized [{As2W19O68}{WO2(mal)}2]18− polyanions hinged together by the Pr3+ ions forming a 1-D infinite helical chain-like architecture. The malate ligand may play a vital role to stabilize the structure of 1 by the formation of the five-membered W–O–C–C–O chelate ring. Solid state photoluminescence reveals that 1 features excitation wavelength-dependent emission properties, achieving a reversible emission color switching simply via changing the excitation wavelength. Time-resolved emission spectroscopy (TRES) indicates that the photoexcitation O → M ligand to metal charge transfer (LMCT) of arsenotungstate fragments can sensitize the Pr3+ ions through intramolecular energy transitions in 1.
中文翻译：
螺旋链状有机-无机杂化亚硒酸盐，具有可调节颜色的光致发光†
一维无限螺旋状链状有机-无机杂化亚硒酸钠Na 4 H 8 [{Pr（H 2 O）2 } 2 {As 2 W 19 O 68 } {WO 2（mal）} 2 ]·24H 2 O制备（mal ＝苹果酸）（1），其通过元素分析，热重（TG）分析，IR光谱，粉末X射线衍射（PXRD）和X射线单晶衍射来表征。结构表征表明1包含有机官能化的[{As 2 W 19 O 68 } {WO 2（mal）2 ] 18-聚阴离子通过Pr 3+离子铰接在一起，形成一维无限螺旋状链状结构。苹果酸配体可能通过形成五元W–OC–CC–O螯合物环而对稳定1的结构起至关重要的作用。固态光致发光显示，1设有激发波长有关的发射性能，实现了可逆发光颜色简单地切换通过改变激发波长。时间分辨发射光谱（TRES）表明光激发O→M配体对砷酸非钨酸盐片段的金属电荷转移（LMCT）可以敏化Pr 3+离子通过分子内的能量跃迁在1。
更新日期：2018-01-02
中文翻译：
螺旋链状有机-无机杂化亚硒酸盐，具有可调节颜色的光致发光†
一维无限螺旋状链状有机-无机杂化亚硒酸钠Na 4 H 8 [{Pr（H 2 O）2 } 2 {As 2 W 19 O 68 } {WO 2（mal）} 2 ]·24H 2 O制备（mal ＝苹果酸）（1），其通过元素分析，热重（TG）分析，IR光谱，粉末X射线衍射（PXRD）和X射线单晶衍射来表征。结构表征表明1包含有机官能化的[{As 2 W 19 O 68 } {WO 2（mal）2 ] 18-聚阴离子通过Pr 3+离子铰接在一起，形成一维无限螺旋状链状结构。苹果酸配体可能通过形成五元W–OC–CC–O螯合物环而对稳定1的结构起至关重要的作用。固态光致发光显示，1设有激发波长有关的发射性能，实现了可逆发光颜色简单地切换通过改变激发波长。时间分辨发射光谱（TRES）表明光激发O→M配体对砷酸非钨酸盐片段的金属电荷转移（LMCT）可以敏化Pr 3+离子通过分子内的能量跃迁在1。
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