Employment of the organic 2‐(pyridin‐4‐yl)quinoline‐4‐carboxylic acid ligand with extended coordination capabilities leads to the formation of the one‐dimensional copper(II) coordination polymer catena‐poly[[diaquacopper(II)]‐bis[μ‐2‐(pyridin‐4‐yl)quinoline‐4‐carboxylato]‐κ²N²:O;κ²O:N], {[Cu(C₁₅H₉N₂O₂)₂(H₂O)₂]·2H₂O}_n, under hydrothermal conditions. The ligand, isolated as its hydrochloride salt, namely, 4‐(4‐carboxyquinolin‐2‐yl)pyridinium chloride monohydrate, C₁₅H₁₁N₂O₂⁺·Cl⁻·H₂O, reveals a pseudosymmetry element (translation a/2) in its crystal structure. The additional pyridyl N atom, in comparison with the previously reported analogues with an arene ring instead of the pyridyl ring in the present ligand molecule, promotes the formation of a one‐dimensional coordination polymer, rather than discrete molecules. This polymer shows photoluminescent properties with bathochromic/hypsochromic shifts of the ligand absorption bands, leading to a single band at 479 nm. The Cu^II ions are involved in weak antiferromagnetic interactions within dimeric units, as evidenced by SQUID magnetometry.

中文翻译：

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一种新的光致发光配位聚合物，该聚合物由具有扩展的配位能力的N-供体配体构成，该配位能力来自喹啉和吡啶。

有机2-（吡啶-4-基）喹啉-4-羧酸与扩展协调能力引线配体与一维铜的形成的雇佣（II）配位聚合物系列-聚[[diaquacopper（II）] -双[μ-2-（吡啶-4-基）喹啉-4-羧酸根]-κ ² ñ ²：ø ;κ ² ø：ñ ]，{[铜（C ₁₅ H ^ ₉ ñ ₂ ö ₂）₂（H ₂ O）₂ ]·2H ₂ O} _n在热液条件下。的配体，分离为它的盐酸盐，即，4-（4- carboxyquinolin -2-基）吡啶鎓氯化物一水合物，C ₁₅ ħ ₁₁ Ñ ₂ ö ₂ ⁺ ·氯^- ·H ₂ O，揭示了一个伪对称元件（翻译一个/ 2）的晶体结构。与先前报道的本发明配体分子中具有芳烃环而不是吡啶基环的类似物相比，额外的吡啶基N原子可促进一维配位聚合物的形成，而不是离散分子的形成。该聚合物显示出光致发光特性，配体吸收带发生了红移/深移，导致在479 nm处出现一个单带。如SQUID磁力分析所证明的，Cu ^II离子与二聚体单元中的弱反铁磁相互作用有关。