Synthesis and Characterization of Three New Zipper‐like Lanthanide [Ln = TmIII,NdIII, CeIII] Coordination Polymers Containing 1,3‐Benzenedicarboxylate and 2‐Phenyl‐1H‐1,3,7,8‐tetraazacyclopenta[l]phenanthrene Ligands |
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Authors: | Xiang‐Cheng Wang Chun‐Bo Liu Jing Chen Xiu‐Ying Li Prof. Dr. Guang‐Bo Che Prof. Dr. Yong‐Sheng Yan |
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Affiliation: | 1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China;2. Key Laboratory of Preparation and, Applications of Environmental Friendly Materials, Chinese Ministry of Education, Siping 136000, P. R. China;3. College of Environmental Engineering, Jilin Normal University, Siping 136000, P. R. China |
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Abstract: | Reaction of the ligands 2‐phenyl‐1H‐1,3,7,8‐tetraazacyclopenta[l]phenanthrene (PTCP) and benzene‐1,3‐dicarboxylic acid (m‐H2BDC) with Ln2O3 under hydrothermal conditions lead to three isomorphous coordination polymers [Ln2(PTCP)2(m‐BDC)3·H2O]n (Ln = Tm, 1 ; Nd, 2 ; Ce, 3 ). The coordination polymers crystallize in monoclinic, space group P21/m with a = 9.8340(2), b = 17.9140(4), c = 15.6050(3) Å, β = 100.51(3)° for 1 , with a = 9.8423(3), b = 18.3562(4), c = 15.6209(3) Å, β = 102.138(3)° for 2 , and with a = 9.8620(2), b = 18.4960(4), c = 15.6530(3) Å, β = 102.42(3)° for 3 , respectively. The metal ions (Ln3+) are located in an octacoordinated environment and the dinuclear [Ln2O12N4] units act as octahedral secondary building units (SBU), which are bridged in two coordination modes by six m‐BDC ligands to form a three‐strand‐like chain. These chains are decorated by PTCP ligands and form unique three zipper‐like structures, which are further assembled into three‐dimensional supramolecular nets by π ··· π stacking interactions. Additionally, hydrogen bonds are observed in the structures. Furthermore, compounds 1 – 3 were studied by IR spectrocopy and thermogravimetric analyses. |
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Keywords: | Lanthanides Benzene‐1,3‐dicarboxylic acid 2‐Phenyl‐1H‐1,3,7,8‐tetraazacyclopenta[l]phenanthrene Hydrothermal synthesis X‐ray diffraction |
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