Five new rare-earth coordination polymers (CPs) were designed in order to offer a remarkable platform that contains light-harvesting antennas and catalytic active centers to achieve solar-energy conversion as green alternatives in the synthesis of imines. These five new spirobifluorene-containing Ln-CPs, named [Er₃(Hsfdc)₃(sfdc)₃(H₂O)]·xH₂O (RPF-30-Er), [Ln(Hsfdc)(sfdc)(EtOH)]·S (RPF-31-Ln, where Ln = La, Nd, and Sm and S = H₂O or EtOH), and [Ho(Hsfdc)(sfdc)(H₂O)] (RPF-32-Ho) (RPF = rare-earth polymeric framework and H₂sfdc = 9,9′-spirobi[9H-fluorene]-2,2′-dicarboxylic acid), have been solvothermally synthesized, and their structural features can be described as follows: (i) RPF-30-Er shows a 3D framework in which the inorganic trimers (secondary building units) are cross-linked by Hsfdc^– and sfdc^2– linkers displaying a pcu topology. (ii) The isostructural RPF-31-Ln series of materials, together with RPF-32-Ho, exhibit a 1D network of chains growing along the a axis with a ribbon-of-rings topology type. The photocatalytic activity of the RPF-n materials was tested in the oxidative coupling of amines using molecular oxygen and air as oxidizing agents under warm light. Among the materials investigated, RPF-31-Nd was chosen to further investigate the approach in the selectivity of different amine derivates.

中文翻译：

---

高效稀土基配位聚合物作为绿色光催化剂，在室温下合成亚胺

设计了五种新型稀土配位聚合物（CP），以提供一个出色的平台，该平台包含光收集天线和催化活性中心，可实现太阳能转换，成为亚胺合成中的绿色替代品。这五个新的含螺二芴的Ln-CP分别命名为[Er ₃（Hsfdc）₃（sfdc）₃（H ₂ O）]· x H ₂ O（RPF-30-Er），[Ln（Hsfdc）（sfdc）（ EtOH）]·S（RPF-31-Ln，其中Ln = La，Nd和Sm，S = H ₂ O或EtOH），以及[Ho（Hsfdc）（sfdc）（H ₂ O）]（RPF-32 -Ho）（RPF =稀土聚合物骨架和H ₂sfdc = 9,9'-spirbibi [9 H-芴] -2,2'-二羧酸），已经溶剂热合成，其结构特征可描述如下：（i）RPF-30-Er显示3D框架，其中无机三聚体（二级建筑单元）通过显示pcu拓扑的Hsfdc ^–和sfdc ^{2 –}连接器进行交联。（ii）同构的RPF-31-Ln系列材料与RPF-32-Ho一起显示一维链状网络，该链状网络沿着带环的拓扑类型的a轴生长。RPF- n的光催化活性在温暖的光线下，使用分子氧和空气作为氧化剂，在胺的氧化偶合中测试了这些材料。在研究的材料中，选择了RPF-31-Nd来进一步研究不同胺衍生物的选择性方法。