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New structurally diverse photoactive cadmium coordination polymers
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-11-25 , DOI: 10.1039/d1dt03405g Ning Wang 1 , Bing-Fan Long 1 , Xian-Hong Yin 1 , Zhong-Jing Huang 1 , Yan Mi 1 , Fei-Long Hu 1 , David James Young 2
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-11-25 , DOI: 10.1039/d1dt03405g Ning Wang 1 , Bing-Fan Long 1 , Xian-Hong Yin 1 , Zhong-Jing Huang 1 , Yan Mi 1 , Fei-Long Hu 1 , David James Young 2
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Four structurally diverse coordination polymers 1–4 (CP1–CP4) were designed and constructed from Cd(II) ions and various carboxyl ligands (H2oba, 4,4′-oxydibenzoic acid; H2bpa, (E)-4,4′-(ethene-1,2-diyl)dibenzoic acid; H2pbda, 4,4′-((1,3-phenylenebis(methylene))bis(oxy))dibenzoic acid) and the alkene containing ligand (CH3-bpeb, 4,4′-((1E,1′E)-(2,5-dimethyl-1,4-phenylene)bis(ethene-2,1-diyl))dipyridine). CP1–CP4 possess Cd2 binuclear secondary building units (SBUs). The geometry of the dicarboxylate ligands and the reaction conditions determined the final structure with a variety of motifs. CP1 possesses an interdigitated 2D structure, while CP2 consists of a 1D channel-like motif with isolated CH3-bpeb molecules embedded in the channels. The solid-state structure of CP3 consists of two unique layers interpenetrated to form a 2D + 2D → 2D polycatenated backbone, while a 1D channel-like motif filled by isolated CH3-bpeb molecules was observed for CP4. In all four coordination polymers pairs of CH3-bpeb molecules were bound or encapsulated by the Cd2 secondary building units at an appropriate distance and orientation for solid-state [2 + 2] photodimerization of one pair of C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
C bonds. Desolvation of CP3 with heat resulted in a decrease in solid-state fluorescence and a slowing of the rate of solid-state photodimerization.
中文翻译：
新型结构多样的光活性镉配位聚合物
四种结构不同的配位聚合物1–4 ( CP 1 –CP 4 ) 由 Cd( II ) 离子和各种羧基配体（H 2 oba，4,4'-氧二苯甲酸；H 2 bpa，（E）- 4,4'-(乙烯-1,2-二基)二苯甲酸；H 2 pbda, 4,4'-((1,3-亚苯基双(亚甲基))双(氧基))二苯甲酸)和含烯烃的配体(CH 3 -bpeb, 4,4'-((1 E ,1' E )-(2,5-二甲基-1,4-亚苯基)双(乙烯-2,1-二基))二吡啶)。CP 1 –CP 4具有 Cd 2双核二级建筑单元（SBU）。二羧酸配体的几何形状和反应条件决定了具有各种基序的最终结构。CP 1具有交叉的二维结构，而CP 2由一维通道样基序组成，通道中嵌入了孤立的 CH 3 -bpeb 分子。CP 3的固态结构由两个独特的层组成，它们相互渗透以形成 2D + 2D → 2D 多链主链，而CP 4观察到由孤立的 CH 3 -bpeb 分子填充的一维通道状基序。在所有四种配位聚合物对中 CH 3-bpeb 分子被 Cd 2二级构建单元以适当的距离和方向结合或封装，用于一对 CC 键的固态 [2 + 2] 光二聚化。CP 3加热去溶剂化导致固态荧光降低和固态光二聚化速率减慢。
更新日期：2021-12-03
C bonds. Desolvation of CP3 with heat resulted in a decrease in solid-state fluorescence and a slowing of the rate of solid-state photodimerization.
中文翻译：
新型结构多样的光活性镉配位聚合物
四种结构不同的配位聚合物1–4 ( CP 1 –CP 4 ) 由 Cd( II ) 离子和各种羧基配体（H 2 oba，4,4'-氧二苯甲酸；H 2 bpa，（E）- 4,4'-(乙烯-1,2-二基)二苯甲酸；H 2 pbda, 4,4'-((1,3-亚苯基双(亚甲基))双(氧基))二苯甲酸)和含烯烃的配体(CH 3 -bpeb, 4,4'-((1 E ,1' E )-(2,5-二甲基-1,4-亚苯基)双(乙烯-2,1-二基))二吡啶)。CP 1 –CP 4具有 Cd 2双核二级建筑单元（SBU）。二羧酸配体的几何形状和反应条件决定了具有各种基序的最终结构。CP 1具有交叉的二维结构，而CP 2由一维通道样基序组成，通道中嵌入了孤立的 CH 3 -bpeb 分子。CP 3的固态结构由两个独特的层组成，它们相互渗透以形成 2D + 2D → 2D 多链主链，而CP 4观察到由孤立的 CH 3 -bpeb 分子填充的一维通道状基序。在所有四种配位聚合物对中 CH 3-bpeb 分子被 Cd 2二级构建单元以适当的距离和方向结合或封装，用于一对 C
C 键的固态 [2 + 2] 光二聚化。CP 3加热去溶剂化导致固态荧光降低和固态光二聚化速率减慢。
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