{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T05:59:59Z","timestamp":1760853599561},"reference-count":36,"publisher":"World Scientific Pub Co Pte Ltd","issue":"03","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Porphyrins Phthalocyanines"],"published-print":{"date-parts":[[2012,3]]},"abstract":"<jats:p>The separation and isolation of the four atropisomers of ortho-halogenated tetraarylporphyrins by semi-preparative HPLC is described. Full characterization and assignment of all<jats:sup>1<\/jats:sup>H and<jats:sup>13<\/jats:sup>C resonances of 5,10,15,20-tetrakis(2-fluoro or 2-chlorophenyl)porphyrins and 5,10,15,20-tetrakis(2-fluoro or chloro-5-N-ethylsulfamoylphenyl)porphyrins by 1D and 2D NMR techniques is reported. The outcome is an unequivocal evidence of the chlorosulfonation of meso-tetra(2-haloaryl)porphyrins on the 5\u2032-position.<\/jats:p>","DOI":"10.1142\/s1088424612500368","type":"journal-article","created":{"date-parts":[[2012,4,25]],"date-time":"2012-04-25T11:42:00Z","timestamp":1335354120000},"page":"316-323","source":"Crossref","is-referenced-by-count":6,"title":["Separation and atropisomer isolation of<i>ortho<\/i>-halogenated tetraarylporphyrins by HPLC: Full characterization using 1D and 2D NMR"],"prefix":"10.1142","volume":"16","author":[{"given":"Carlos J.P.","family":"Monteiro","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal"}]},{"given":"Mariette M.","family":"Pereira","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal"}]},{"given":"Nuno P. 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