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Addition of 1 equiv AgX to the corresponding preformed [M(tpt)2]X2 salt in concentrated MeNO2 solution affords thixotropic gels. Gelation was not observed in analogous reactions using [Mn(tpt)2][ClO4]2, or from reactions in other, more donating solvents. Scanning electron microscopy (SEM) images from dilute solutions of the reagents confirmed the fibrous microstructure of the gels and their homogeneous elemental composition. However, energy-dispersive X-ray data show a reduced Fe\/Ag ratio compared to the Co\/Ag and Ni\/Ag gels, where a 1:1 ratio of metals is evident. More concentrated gels decomposed to silver nanoparticles during SEM sample preparation. Mass spectrometry and 1H NMR indicate that silver induces partial ligand displacement reactions in [Fe(tpt)2]2+ and [Co(tpt)2]2+, but not in [Ni(tpt)2]2+. Hence, the strength of the gels, which follows the order M = Mn (no gel) &amp;lt; Fe &amp;lt; Co &amp;lt; Ni, correlates with the stability of octahedral [M(tpt)2]2+ under gelation conditions. Iron(II) complexes of the related ligands 2,4,6-tri{pyrazol-1-yl}pyridine (tpp) and 2,4,6-tri{pyrazol-1-yl}pyrimidine (tpym) did not undergo gelation with silver salts under the above conditions. The unique properties of tpt as a gelator in this work may reflect the crystallographically observed ability of metal-coordinated tpt to chelate to exogenous silver ions, through its pendant pyrazolyl group and triazinyl N donors. In contrast, the pendant azolyl substituents in silver complexes of the nongelators tpp and tpym only bind exogenous silver in monodentate fashion.<\/jats:p>","DOI":"10.1021\/acsomega.8b02508","type":"journal-article","created":{"date-parts":[[2018,12,27]],"date-time":"2018-12-27T09:01:50Z","timestamp":1545901310000},"page":"18466-18474","source":"Crossref","is-referenced-by-count":15,"title":["Heterometallic Coordination Polymer Gels Supported\nby 2,4,6-Tris(pyrazol-1-yl)-1,3,5-triazine"],"prefix":"10.1021","volume":"3","author":[{"given":"Izar Capel","family":"Berdiell","sequence":"first","affiliation":[{"name":"University of Leeds , , Woodhouse Lane , ,","place":["Leeds, U.K., LS2 9JT"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2798-9301","authenticated-orcid":true,"given":"Alexander N.","family":"Kulak","sequence":"additional","affiliation":[{"name":"University of Leeds , , Woodhouse Lane , ,","place":["Leeds, U.K., LS2 9JT"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stuart L.","family":"Warriner","sequence":"additional","affiliation":[{"name":"University of Leeds , , Woodhouse Lane , ,","place":["Leeds, U.K., LS2 9JT"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7491-9034","authenticated-orcid":true,"given":"Malcolm A.","family":"Halcrow","sequence":"additional","affiliation":[{"name":"University of Leeds , , Woodhouse Lane , ,","place":["Leeds, U.K., LS2 9JT"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2018,12,27]]},"reference":[{"key":"2026090408093879600_cit1","doi-asserted-by":"publisher","first-page":"1982","DOI":"10.1021\/ar5000456","article-title":"Supramolecular Polymers\nConstructed from Macrocycle-Based Host-Guest Molecular Recognition\nMotifs","volume":"47","author":"Dong","year":"2014","journal-title":"Acc. 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