{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T08:48:56Z","timestamp":1769762936710,"version":"3.49.0"},"reference-count":45,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T00:00:00Z","timestamp":1676505600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["PIDDAC\u2014UIDB\/00100\/2020"],"award-info":[{"award-number":["PIDDAC\u2014UIDB\/00100\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["UIDP\/00100\/2020"],"award-info":[{"award-number":["UIDP\/00100\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["UIDP\/04028\/2020"],"award-info":[{"award-number":["UIDP\/04028\/2020"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["LA\/P\/0056\/2020"],"award-info":[{"award-number":["LA\/P\/0056\/2020"]}]},{"name":"Associate Laboratory","award":["PIDDAC\u2014UIDB\/00100\/2020"],"award-info":[{"award-number":["PIDDAC\u2014UIDB\/00100\/2020"]}]},{"name":"Associate Laboratory","award":["UIDP\/00100\/2020"],"award-info":[{"award-number":["UIDP\/00100\/2020"]}]},{"name":"Associate Laboratory","award":["UIDP\/04028\/2020"],"award-info":[{"award-number":["UIDP\/04028\/2020"]}]},{"name":"Associate Laboratory","award":["LA\/P\/0056\/2020"],"award-info":[{"award-number":["LA\/P\/0056\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Hydrogen sulfide (H2S) and nitric oxide (NO) are especially known as toxic and polluting gases, yet they are also endogenously produced and play key roles in numerous biological processes. These two opposing aspects of the gases highlight the need for new types of materials to be developed in addition to the most common materials such as activated carbons and zeolites. Herein, a new imine-linked polymer organic framework was obtained using the inexpensive and easy-to-access reagents isophthalaldehyde and 2,4,6-triaminopyrimidine in good yield (64%) through the simple and catalyst-free Schiff-base reaction. The polymeric material has microporosity, an ABET surface area of 51 m2\/g, and temperature stability up to 300 \u00b0C. The obtained 2,4,6-triaminopyrimidine imine-linked polymer organic material has a higher capacity to adsorb NO (1.6 mmol\/g) than H2S (0.97 mmol\/g). Release studies in aqueous solution showed that H2S has a faster release (3 h) from the material than NO, for which a steady release was observed for at least 5 h. This result is the first evaluation of the possibility of an imine-linked polymer organic framework being used in the therapeutic release of NO or H2S.<\/jats:p>","DOI":"10.3390\/ma16041655","type":"journal-article","created":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T04:51:46Z","timestamp":1676523106000},"page":"1655","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Evaluation of an Imine-Linked Polymer Organic Framework for Storage and Release of H2S and NO"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1707-8854","authenticated-orcid":false,"given":"S\u00edlvia","family":"Carvalho","sequence":"first","affiliation":[{"name":"CERENA, Departamento de Engenharia Qu\u00edmica, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Campus Alameda, 1049-001 Lisboa, Portugal"},{"name":"CQE, Centro de Qu\u00edmica Estrutural, Institute of Molecular Sciences, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8374-558X","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Pires","sequence":"additional","affiliation":[{"name":"CQE, Centro de Qu\u00edmica Estrutural, Institute of Molecular Sciences, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9276-6788","authenticated-orcid":false,"given":"Cristina","family":"Moiteiro","sequence":"additional","affiliation":[{"name":"CQE, Centro de Qu\u00edmica Estrutural, Institute of Molecular Sciences, Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3061-9632","authenticated-orcid":false,"given":"Mois\u00e9s L.","family":"Pinto","sequence":"additional","affiliation":[{"name":"CERENA, Departamento de Engenharia Qu\u00edmica, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Campus Alameda, 1049-001 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1038\/s42004-021-00549-4","article-title":"Evolution of porous materials from ancient remedies to modern frameworks","volume":"4","author":"Day","year":"2021","journal-title":"Commun. 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