Wang Ying, An Baigang, Li Si, Chen Lijiang, Tao Lin, Fang Timing, Guan Lei
Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province, School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China.
Shandong Chambroad Petrochemicals Co., Ltd., Binzhou 256500, China.
Molecules. 2024 Sep 22;29(18):4495. doi: 10.3390/molecules29184495.
A Dy(III) coordination polymer (CP), [Dy(spasds)(HO)] () (NaHspasds = 5-(4-sulfophenylazo)salicylic disodium salt), has been synthesized using a hydrothermal method and characterized. features a 2D layered structure, where the spasda anions act as pentadentate ligands, adopting carboxylate, sulfonate and phenolate groups to bridge with four Dy centers in -: , -: , and monodentate coordination modes, respectively. It possesses a unique (4,4)-connected net with a Schläfli symbol of {4·6}{4}. The luminescence study revealed that exhibited a broad fluorescent emission band at 392 nm. Moreover, the visual blue color has been confirmed by the CIE plot. can serve as a dual-functional luminescent sensor toward Fe and MnO through the luminescence quenching effect, with limits of detection (LODs) of 9.30 × 10 and 1.19 × 10 M, respectively. The LODs are relatively low in comparison with those of the reported CP-based sensors for Fe and MnO. In addition, also has high selectivity and remarkable anti-interference ability, as well as good recyclability for at least five cycles. Furthermore, the potential application of the sensor for the detection of Fe and MnO was studied through simulated wastewater samples with different concentrations. The possible sensing mechanisms were investigated using Ultraviolet-Visible (UV-Vis) absorption spectroscopy and density functional theory (DFT) calculations. The results revealed that the luminescence turn-off effects toward Fe and MnO were caused by competitive absorption and photoinduced electron transfer (PET), and competitive absorption and inner filter effect (IFE), respectively.
一种镝（III）配位聚合物（CP），[Dy(spasds)(HO)] （）（NaHspasds = 5-(4-磺基苯基偶氮)水杨酸二钠盐），已通过水热法合成并进行了表征。其具有二维层状结构，其中spasda阴离子作为五齿配体，分别采用羧酸盐、磺酸盐和酚盐基团以-:、-:和单齿配位模式与四个Dy中心桥连。它拥有一个独特的（4,4）连接网络，施莱夫利符号为{4·6}{4}。发光研究表明，在392 nm处呈现出宽荧光发射带。此外，通过CIE图证实了其视觉蓝色。通过发光猝灭效应，该配位聚合物可作为对Fe和MnO的双功能发光传感器，检测限（LOD）分别为9.30×10和1.19×10 M。与报道的基于CP的Fe和MnO传感器相比，这些检测限相对较低。此外，该配位聚合物还具有高选择性和显著的抗干扰能力，以及至少五个循环的良好可回收性。此外，通过不同浓度的模拟废水样品研究了该传感器检测Fe和MnO的潜在应用。使用紫外可见（UV-Vis）吸收光谱和密度泛函理论（DFT）计算研究了可能的传感机制。结果表明，对Fe和MnO的发光猝灭效应分别是由竞争吸收和光致电子转移（PET）以及竞争吸收和内滤效应（IFE）引起的。
