Crystal engineering with the uranyl cation III. Mixed aliphatic dicarboxylate/aromatic dipyridyl coordination polymers: Synthesis, structures, and speciation

Kerr A.T.; Cahill C.L.

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Crystal engineering with the uranyl cation III. Mixed aliphatic dicarboxylate/aromatic dipyridyl coordination polymers: Synthesis, structures, and speciation

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Seven novel U(VI)-bearing compounds have been synthesized using hydrothermal conditions and characterized via single crystal X-ray diffraction. These materials are the result of systematically pairing aliphatic dicarboxylic acids and dipyridyl (1,2-bis(4-pyridyl)ethane and trans-1,2-bis(4-pyridyl) ethylene) molecules with the uranyl cation and are a conclusion to parts I and II of this study. A common factor of this family of materials is that the carboxylate group preferentially coordinates to the uranyl center, whereas the dipyridyl plays one of two roles: space filling or direct coordination uranyl cation. The role of the dipyridyl appears to be directly related not only to the length of the aliphatic dicarboxylate with which it is paired but also to the rigidity of the dipyridyl species. Further, this family of materials shows a tendency toward specific primary and secondary building units formed by the oligomerization of the uranyl cation despite the diversity suggested by other studies. This tendency appears to be due to the affinity of the ligand(s) for smaller building units.

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《Crystal growth & design》 |2011年第12期|5634-5641|共8页
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Kerr A.T.; Cahill C.L.;
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Department of Chemistry, George Washington University, 725 21st Street N.W., Washington, DC 20052, United States;

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正文语种英语
中图分类晶体学;
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Crystal engineering with the uranyl cation III. Mixed aliphatic dicarboxylate/aromatic dipyridyl coordination polymers: Synthesis, structures, and speciation

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