{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T03:23:21Z","timestamp":1773199401716,"version":"3.50.1"},"reference-count":110,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,11,20]],"date-time":"2021-11-20T00:00:00Z","timestamp":1637366400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["CICECO - Aveiro Institute of Materials, UIDB\/50011\/2020 & UIDP\/50011\/2020"],"award-info":[{"award-number":["CICECO - Aveiro Institute of Materials, UIDB\/50011\/2020 & UIDP\/50011\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["Project POCI-01-0145-FEDER-030075), co-financed by national funds through the FCT\/MCTES and the European Union through the European Regional Development Fund under the Portugal 2020 Partnership Agreement"],"award-info":[{"award-number":["Project POCI-01-0145-FEDER-030075), co-financed by national funds through the FCT\/MCTES and the European Union through the European Regional Development Fund under the Portugal 2020 Partnership Agreement"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["D.M.G. (grant ref. 2021.04756.BD) acknowledges the FCT for PhD grant (State Budget, European Social Fund (ESF) within the framework of PORTUGAL2020, namely through the Centro 2020 Regional Operational Programme)"],"award-info":[{"award-number":["D.M.G. (grant ref. 2021.04756.BD) acknowledges the FCT for PhD grant (State Budget, European Social Fund (ESF) within the framework of PORTUGAL2020, namely through the Centro 2020 Regional Operational Programme)"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["M.S.N. (grant ref. 2021.06403.BD) acknowledges the FCT for PhD grant (State Budget, European Social Fund (ESF) within the framework of PORTUGAL2020, namely through the Centro 2020 Regional Operational Programme)"],"award-info":[{"award-number":["M.S.N. (grant ref. 2021.06403.BD) acknowledges the FCT for PhD grant (State Budget, European Social Fund (ESF) within the framework of PORTUGAL2020, namely through the Centro 2020 Regional Operational Programme)"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["R.F.M gratefully acknowledges the FCT for a Junior Research Position (CEECIND\/00553\/2017)"],"award-info":[{"award-number":["R.F.M gratefully acknowledges the FCT for a Junior Research Position (CEECIND\/00553\/2017)"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Catalysts"],"abstract":"<jats:p>There is a considerable practical interest in discovering new ways to obtain organomolybdenum heterogeneous catalysts for olefin epoxidation that are easier to recover and reuse and display enhanced productivity. In this study, the complex salt (H2pytz)[MoO2Cl2(pytz)] (1) (Hpytz = 5-(2-pyridyl)tetrazole) has been prepared, structurally characterized, and employed as a precursor for the hydrolysis-based synthesis of a microcrystalline molybdenum oxide\/organic hybrid material formulated as [MoO3(Hpytz)] (2). In addition to single-crystal X-ray diffraction (for 1), compounds 1 and 2 were characterized by FT-IR and Raman spectroscopies, solid-state 13C{1H} cross-polarization (CP) magic-angle spinning (MAS) NMR, and scanning electron microscopy (SEM). Compounds 1 and 2 were evaluated as olefin epoxidation catalysts using the model reaction of cis-cyclooctene (Cy8) with tert-butyl hydroperoxide (TBHP), at 70 \u00b0C, which gave 100% epoxide selectivity up to 100% conversion. While 1 behaved as a homogeneous catalyst, hybrid 2 behaved as a heterogeneous catalyst and could be recovered for recycling without showing structural degradation or loss of catalytic performance over consecutive reaction cycles. The substrate scope was broadened to monoterpene DL-limonene (Lim) and biobased unsaturated fatty acid methyl esters, methyl oleate (MeOle), and methyl linoleate (MeLin), which gave predominantly epoxide products.<\/jats:p>","DOI":"10.3390\/catal11111407","type":"journal-article","created":{"date-parts":[[2021,11,21]],"date-time":"2021-11-21T20:58:21Z","timestamp":1637528301000},"page":"1407","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["A 5-(2-Pyridyl)tetrazolate Complex of Molybdenum(VI), Its Structure, and Transformation to a Molybdenum Oxide-Based Hybrid Heterogeneous Catalyst for the Epoxidation of Olefins"],"prefix":"10.3390","volume":"11","author":[{"given":"Martinique S.","family":"Nunes","sequence":"first","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7077-8796","authenticated-orcid":false,"given":"Diana M.","family":"Gomes","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9598-1275","authenticated-orcid":false,"given":"Ana C.","family":"Gomes","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1932-4975","authenticated-orcid":false,"given":"Patr\u00edcia","family":"Neves","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8242-324X","authenticated-orcid":false,"given":"Ricardo F.","family":"Mendes","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2051-5645","authenticated-orcid":false,"given":"Filipe A. Almeida","family":"Paz","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Andr\u00e9 D.","family":"Lopes","sequence":"additional","affiliation":[{"name":"Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal"},{"name":"Department of Chemistry and Pharmacy, Faculty of Sciences and Technology, FCT, Gambelas Campus, University of Algarve, UAlg, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3495-2133","authenticated-orcid":false,"given":"Anabela A.","family":"Valente","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2836-7715","authenticated-orcid":false,"given":"Isabel S.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6243-7692","authenticated-orcid":false,"given":"Martyn","family":"Pillinger","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Campus Universit\u00e1rio de Santiago, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1970","DOI":"10.1021\/acs.chemrev.8b00564","article-title":"Tetrazoles via multicomponent reactions","volume":"119","author":"Neochoritis","year":"2019","journal-title":"Chem. 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