{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T04:53:26Z","timestamp":1787028806998,"version":"build-2736575974"},"reference-count":87,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2020,11,28]],"date-time":"2020-11-28T00:00:00Z","timestamp":1606521600000},"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>The reaction of 2,6-diformyl-4-methylphenol (DFMF) with 1-amino-2-propanol (AP) and tris(hydroxymethyl)aminomethane (THMAM) was investigated in the presence of Cobalt(II) salts, (X = ClO4\u2212, CH3CO2\u2212, Cl\u2212, NO3\u2212), sodium azide (NaN3), and triethylamine (TEA). In one pot, the variation in Cobalt(II) salt results in the self-assembly of dinuclear, tetranuclear, and H-bonding-directed polynuclear coordination complexes of Cobalt(III), Cobalt(II), and mixed-valence CoIICoIII: [Co2III(H2L\u22121)2(AP\u22121)(N3)](ClO4)2 (1), [Co4(H2L\u22121)2(\u00b53-1,1,1-N3)2(\u00b5-1,1-N3)2Cl2(CH3OH)2]\u03874CH3OH (2), [Co2IICo2III(HL\u22122)2(\u00b5-CH3CO2)2(\u00b53-OH)2](NO3)2\u03872CH3CH2OH (3), and [Co2IICo2III (H2L12\u2212)2(THMAM\u22121)2](NO3)4 (4). In 1, two cobalt(III) ions are connected via three single atom bridges; two from deprotonated ethanolic oxygen atoms in the side arms of the ligands and one from the1-amino-2-propanol moiety forming a dinuclear unit with a very short (2.5430(11) \u00c5) Co-Co intermetallic separation with a coordination number of 7, a rare feature for cobalt(III). In 2, two cobalt(II) ions in a dinuclear unit are bridged through phenoxide O and \u03bc3-1,1,1-N3 azido bridges, and the two dinuclear units are interconnected by two \u03bc-1,1-N3 and two \u03bc3-1,1,1-N3 azido bridges generating tetranuclear cationic [Co4(H2L\u22121)2(\u00b53-1,1,1-N3)2(\u00b5-1,1-N3)2Cl2(CH3OH)2]2+ units with an incomplete double cubane core, which grow into polynuclear 1D-single chains along the a-axis through H-bonding. In 3, HL2\u2212 holds mixed-valent Co(II)\/Co(III) ions in a dinuclear unit bridged via phenoxide O, \u03bc-1,3-CH3CO2\u2212, and \u03bc3-OH\u2212 bridges, and the dinuclear units are interconnected through two deprotonated ethanolic O in the side arms of the ligands and two \u03bc3-OH\u2212 bridges generating cationic tetranuclear [Co2IICo2III(HL\u22122)2(\u00b5-CH3CO2)2(\u00b53-OH)2]2+ units with an incomplete double cubane core. In 4, H2L1\u22122 holds mixed-valent Co(II)\/Co(III) ions in dinuclear units which dimerize through two ethanolic O (\u03bc-RO\u2212) in the side arms of the ligands and two ethanolic O (\u03bc3-RO\u2212) of THMAM bridges producing centrosymmetric cationic tetranuclear [Co2IICo2III (H2L1\u22122)2(THMAM\u22121)2]4+ units which grow into 2D-sheets along the bc-axis through a network of H-bonding. Bulk magnetization measurements on 2 demonstrate that the magnetic interactions are completely dominated by an overall ferromagnetic coupling occurring between Co(II) ions.<\/jats:p>","DOI":"10.3390\/ma13235425","type":"journal-article","created":{"date-parts":[[2020,11,29]],"date-time":"2020-11-29T21:00:57Z","timestamp":1606683657000},"page":"5425","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["One-Pot Self-Assembly of Dinuclear, Tetranuclear, and H-Bonding-Directed Polynuclear Cobalt(II), Cobalt(III), and Mixed-Valence Co(II)\/Co(III) Complexes of Schiff Base Ligands with Incomplete Double Cubane Core"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0992-4392","authenticated-orcid":false,"given":"Santokh S.","family":"Tandon","sequence":"first","affiliation":[{"name":"Department of Chemistry and Biochemistry, Kent State University - Salem Campus, Salem, OH 44460, USA"},{"name":"Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neil","family":"Patel","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9325-0794","authenticated-orcid":false,"given":"Scott D.","family":"Bunge","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esther C.","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachel","family":"Thompson","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44242, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laurence K.","family":"Thompson","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Memorial University, St. John\u2019s, NL A1B 3X7, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2817","DOI":"10.1039\/b820283b","article-title":"Combining supramolecular chemistry with biology","volume":"39","author":"Uhlenheuer","year":"2010","journal-title":"Chem. 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