{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T21:59:29Z","timestamp":1776808769844,"version":"3.51.2"},"reference-count":46,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,3,17]],"date-time":"2020-03-17T00:00:00Z","timestamp":1584403200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>A relatively unexplored synthetic route in redox-active Mn(II\/III) coordination chemistry has been employed toward the preparation of a new mixed-valence MnII\/III 1-D linear chain from the reaction of [MnIII(sacb)2]\u2212 precursor with a MnII source, where sacbH2 is the Schiff base ligand N-salicylidene-2-amino-5-chlorobenzoic acid. The mononuclear (Pr2NH2)[MnIII(sacb)2] (1) compound was obtained in excellent yields (&gt;85%) from the 1:2:3 reaction of Mn(O2CMe)2\u22194H2O, sacbH2 and Pr2NH, respectively. In 1, the two doubly deprotonated sacb2\u2212 ligands act as Ocarboxylate,Nimine,Ophenoxide-tridentate chelates, while the second carboxylate O atom of sacb2\u2212 is dangling and H-bonded to the Pr2NH2+ countercation. Complex 1 was subsequently used as a \u2018ligand\u2019 to react stoichiometrically with the \u2018metal\u2019 Mn(NO3)2\u22194H2O, thus leading to the 1-D coordination polymer {[MnIIMnIII(sacb)2(H2O)2(MeOH)2](NO3)}n (2) in good yields (~50%). The removal of Pr2NH2+ from the vicinity of the [MnIII(sacb)2]\u2212 metalloligand has rendered possible (vide infra) the coordination of the second Ocarboxylate of sacb2\u2212 to neighboring {MnII(H2O)2(MeOH)2}2+ units, and consequently the formation of the 1-D polymer 2. Direct-current (dc) magnetic susceptibility studies revealed the presence of very weak antiferromagnetic exchange interactions between alternating MnIII and MnII atoms with a coupling constant of J = \u22120.08 cm\u22121 for g = 2.00. The combined results demonstrate the potential of the \u2018metal complexes as ligands\u2019 approach to yield new mixed-valence Mn(II\/III) coordination polymers with interesting structural motifs and physicochemical properties.<\/jats:p>","DOI":"10.3390\/ma13061352","type":"journal-article","created":{"date-parts":[[2020,3,18]],"date-time":"2020-03-18T08:13:27Z","timestamp":1584519207000},"page":"1352","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["\u2018Metal Complexes as Ligands\u2019 for the Synthesis of Coordination Polymers: A MnIII Monomer as a Building Block for the Preparation of an Unprecedented 1-D {MnIIMnIII}n Linear Chain"],"prefix":"10.3390","volume":"13","author":[{"given":"Konstantinos N.","family":"Pantelis","sequence":"first","affiliation":[{"name":"Chemistry Department, University of Patras, 265 04 Patras, Greece"}]},{"given":"Georgios","family":"Karotsis","sequence":"additional","affiliation":[{"name":"Department of Chemistry, 1812 Sir Isaac Brock Way, Brock University, L2S 3A1 St. Catharines, ON L2S 3A1, Canada"}]},{"given":"Christos","family":"Lampropoulos","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of North Florida, 1 UNF Dr., Jacksonville, FL 32224, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9229-1412","authenticated-orcid":false,"given":"Lu\u00eds","family":"Cunha-Silva","sequence":"additional","affiliation":[{"name":"LAQV\/REQUIMTE &amp; Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6274-6866","authenticated-orcid":false,"given":"Albert","family":"Escuer","sequence":"additional","affiliation":[{"name":"Departament de Quimica Inorg\u00e0nica i Org\u00e0nica, Secci\u00f3 Inorg\u00e0nica and Institut de Nanoci\u00e8ncia i Nanotecnologia (IN2UB), Universitat de Barcelona, Mart\u00ed Franqu\u00e9s 1-11, 08028 Barcelona, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9798-9331","authenticated-orcid":false,"given":"Theocharis C.","family":"Stamatatos","sequence":"additional","affiliation":[{"name":"Chemistry Department, University of Patras, 265 04 Patras, Greece"},{"name":"Department of Chemistry, 1812 Sir Isaac Brock Way, Brock University, L2S 3A1 St. Catharines, ON L2S 3A1, Canada"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1597","DOI":"10.1039\/C5CS00590F","article-title":"Filling the gap between the quantum and classical worlds of nanoscale magnetism: Giant molecular aggregates based on paramagnetic 3d metal ions","volume":"45","author":"Papatriantafyllopoulou","year":"2016","journal-title":"Chem. 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