{"title":"Rigid-flexible-ligand-ornamented lanthanide-incorporated selenotungstates and photoluminescence properties","authors":"","doi":"10.1016/j.cjsc.2024.100370","DOIUrl":null,"url":null,"abstract":"<div><p><span><span>Currently, organic-inorganic hybrid lanthanide-incorporated polyoxometalates (POMs) have emerged as a prominent research area. Herein, we employ a simple raw material assembly method to synthesize two neoteric mixed-organic-ligand-ornamented </span>lanthanide (Ln) incorporated selenotungstates [H</span><sub>2</sub>N(CH<sub>3</sub>)<sub>2</sub>]<sub>16</sub>Na<sub>2</sub>[Ln<sub>4</sub>(H<sub>2</sub>O)<sub>6</sub>(HPZDA)<sub>2</sub>(HFMA)<sub>2</sub>W<sub>8</sub>O<sub>21</sub>][B-<em>α</em>-SeW<sub>9</sub>O<sub>33</sub>]<sub>4</sub>·29H<sub>2</sub>O (Ln = Sm<sup>3+</sup> (<strong>1</strong>), La<sup>3+</sup> (<strong>2</strong>); H<sub>2</sub>PZDA = 2,3-pyrazine dicarboxylic acid, H<sub>2</sub>FMA = fumaric acid). <strong>1</strong> and <strong>2</strong><span> are isomorphic with the polyanions constructed from four trivacant Keggin [B-</span><em>α</em>-SeW<sub>9</sub>O<sub>33</sub>]<sup>8–</sup> ({SeW<sub>9</sub>}) segments and a rigid-flexible-ligand-ornamented dodeca-nuclear W–Ln heterometallic [Ln<sub>4</sub>(H<sub>2</sub>O)<sub>6</sub>(HPZDA)<sub>2</sub>(HFMA)<sub>2</sub>W<sub>8</sub>O<sub>21</sub>]<sup>14+</sup><span> cluster. Moreover, the solid-state fluorescence spectrum of </span><strong>1</strong><span> at room temperature mainly exhibits the characteristic emission peak of Sm</span><sup>3+</sup> cations. Additionally, energy transfer from {SeW<sub>9</sub>} to Sm<sup>3+</sup> ions in <strong>1</strong> has been demonstrated by time-resolved spectroscopy. This work presents a feasible dual-ligand synergistic strategy for constructing novel POM derivatives and POM-based fluorescent materials.</p></div>","PeriodicalId":10151,"journal":{"name":"结构化学","volume":"43 9","pages":"Article 100370"},"PeriodicalIF":5.9000,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"结构化学","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0254586124002113","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Currently, organic-inorganic hybrid lanthanide-incorporated polyoxometalates (POMs) have emerged as a prominent research area. Herein, we employ a simple raw material assembly method to synthesize two neoteric mixed-organic-ligand-ornamented lanthanide (Ln) incorporated selenotungstates [H2N(CH3)2]16Na2[Ln4(H2O)6(HPZDA)2(HFMA)2W8O21][B-α-SeW9O33]4·29H2O (Ln = Sm3+ (1), La3+ (2); H2PZDA = 2,3-pyrazine dicarboxylic acid, H2FMA = fumaric acid). 1 and 2 are isomorphic with the polyanions constructed from four trivacant Keggin [B-α-SeW9O33]8– ({SeW9}) segments and a rigid-flexible-ligand-ornamented dodeca-nuclear W–Ln heterometallic [Ln4(H2O)6(HPZDA)2(HFMA)2W8O21]14+ cluster. Moreover, the solid-state fluorescence spectrum of 1 at room temperature mainly exhibits the characteristic emission peak of Sm3+ cations. Additionally, energy transfer from {SeW9} to Sm3+ ions in 1 has been demonstrated by time-resolved spectroscopy. This work presents a feasible dual-ligand synergistic strategy for constructing novel POM derivatives and POM-based fluorescent materials.
期刊介绍：
Chinese Journal of Structural Chemistry “JIEGOU HUAXUE ”, an academic journal consisting of reviews, articles, communications and notes, provides a forum for the reporting and discussion of current novel research achievements in the fields of structural chemistry, crystallography, spectroscopy, quantum chemistry, pharmaceutical chemistry, biochemistry, material science, etc. Structural Chemistry has been indexed by SCI, CA, and some other prestigious publications.
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