{"title":"AIE active Schiff base derived Pd(II) complex as a ratiometric sensor for fluoride ion","authors":"","doi":"10.1016/j.ica.2024.122411","DOIUrl":null,"url":null,"abstract":"<div><div>A tripodal AIE active Schiff base (<strong>L4</strong>) was synthesized and utilized along with pyridine for the synthesis of Pd(II) metal complex (<strong>MH1</strong>) using a two-step process. X-ray diffraction studies were performed to establish the molecular geometry of the synthesized ligand (<strong>L4</strong>) and its metal complex (<strong>MH1</strong>), which revealed square planar geometry for the Pd(II) complex. DFT studies revealed a reduction in HOMO-LUMO gap upon complexation of the ligand with Pd(II) ion. The compound <strong>L4</strong> displayed aggregation induced emission and viscosity induced emission enhancement was observed in <strong>MH1</strong>. The developed metal complex was utilized for the sensitive and selective recognition of F<sup>−</sup> ion through a ligand exchange reaction. A ratiometric “<em>turn-off</em>” response along with colorimetric change are the characteristic features of the Pd(II) complex (<strong>MH1</strong>). The probe revealed a binding constant of 1.4 * 10<sup>7</sup> M<sup>−1</sup> as calculated using Benesi-Hildebrand equation. Moreover, the binding stoichiometry in the <strong>MH1</strong>-F<sup>−</sup> complex was found to be 1:1. The sensing mechanism was established using mass spectrometry as the presence of fluoride incorporated complex was noticed. The structure of the resulting complex was also established using DFT based studies.</div></div>","PeriodicalId":13599,"journal":{"name":"Inorganica Chimica Acta","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganica Chimica Acta","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020169324005024","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
A tripodal AIE active Schiff base (L4) was synthesized and utilized along with pyridine for the synthesis of Pd(II) metal complex (MH1) using a two-step process. X-ray diffraction studies were performed to establish the molecular geometry of the synthesized ligand (L4) and its metal complex (MH1), which revealed square planar geometry for the Pd(II) complex. DFT studies revealed a reduction in HOMO-LUMO gap upon complexation of the ligand with Pd(II) ion. The compound L4 displayed aggregation induced emission and viscosity induced emission enhancement was observed in MH1. The developed metal complex was utilized for the sensitive and selective recognition of F− ion through a ligand exchange reaction. A ratiometric “turn-off” response along with colorimetric change are the characteristic features of the Pd(II) complex (MH1). The probe revealed a binding constant of 1.4 * 107 M−1 as calculated using Benesi-Hildebrand equation. Moreover, the binding stoichiometry in the MH1-F− complex was found to be 1:1. The sensing mechanism was established using mass spectrometry as the presence of fluoride incorporated complex was noticed. The structure of the resulting complex was also established using DFT based studies.
期刊介绍:
Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews.
Topics covered include:
• chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies;
• synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs);
• reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models;
• applications of inorganic compounds, metallodrugs and molecule-based materials.
Papers composed primarily of structural reports will typically not be considered for publication.