{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T21:49:30Z","timestamp":1784929770494,"version":"3.55.0"},"reference-count":68,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2023,9,17]],"date-time":"2023-09-17T00:00:00Z","timestamp":1694908800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Systematic studies of crystalline compounds formed in aqueous systems containing aliphatic diamines, divalent transition metal halides, and selenious acid resulted in the discovery of a large family of new complex species corresponding to several new structure types. With ethylenediamine (en), layered (enH2)[M(HSeO3)2X2] compounds are the most commonly formed species which constitute a significant contribution to the family of layered hydrogen selenites containing neutral [M(HSeO3)2] (M = Mg, Mn, Co, Ni, Cu, Zn, Cd) 2D building blocks. In contrast to some previous suggestions, piperazine (pip), as well as its homologue N-methylpiperazine, mostly give rise to quite different, sometimes more complex, structures of varied dimensionality while the (pipH2)[M(HSeO3)2X2] compounds are formed only with M = Cu and Cd. In addition, metal-, halide-, or selenium-free by-product species are observed. The SeIV can be present in a multitude of forms, including H2SeO3, HSeO3\u2212, SeO32\u2212, and Se2O52\u2212, reflecting amazing adaptability to the shape of the templating cations.<\/jats:p>","DOI":"10.3390\/ijms241814202","type":"journal-article","created":{"date-parts":[[2023,9,17]],"date-time":"2023-09-17T23:25:26Z","timestamp":1694993126000},"page":"14202","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Protonated Organic Diamines as Templates for Layered and Microporous Structures: Synthesis, Crystal Chemistry, and Structural Trends among the Compounds Formed in Aqueous Systems Transition Metal Halide or Nitrate\u2013Diamine\u2013Selenious Acid"],"prefix":"10.3390","volume":"24","author":[{"given":"Dmitri O.","family":"Charkin","sequence":"first","affiliation":[{"name":"Inorganic Chemistry Division, Chemistry Department, Moscow State University, Vorobievy Gory, 1-3, 199991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evgeny V.","family":"Nazarchuk","sequence":"additional","affiliation":[{"name":"Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, 199034 St. Petersburg, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dmitri N.","family":"Dmitriev","sequence":"additional","affiliation":[{"name":"Inorganic Chemistry Division, Chemistry Department, Moscow State University, Vorobievy Gory, 1-3, 199991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vasili Yu.","family":"Grishaev","sequence":"additional","affiliation":[{"name":"Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, 199034 St. Petersburg, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timofey A.","family":"Omelchenko","sequence":"additional","affiliation":[{"name":"Inorganic Chemistry Division, Chemistry Department, Moscow State University, Vorobievy Gory, 1-3, 199991 Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2823-0986","authenticated-orcid":false,"given":"Darya V.","family":"Spiridonova","sequence":"additional","affiliation":[{"name":"X-ray Diffraction Resource Center, St. Petersburg State University, 199034 St. Petersburg, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1908-3152","authenticated-orcid":false,"given":"Oleg I.","family":"Siidra","sequence":"additional","affiliation":[{"name":"Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, 199034 St. Petersburg, Russia"},{"name":"Kola Science Center, Russian Academy of Sciences, Fersman Str. 14, 184209 Apatity, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2774","DOI":"10.1021\/acs.accounts.6b00452","article-title":"Toward the rational design of novel noncentrosymmetric materials: Factors influencing the framework structures","volume":"49","author":"Ok","year":"2016","journal-title":"Acc. 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