{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T14:39:10Z","timestamp":1774276750738,"version":"3.50.1"},"reference-count":48,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2005,11,10]],"date-time":"2005-11-10T00:00:00Z","timestamp":1131580800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Eur J Org Chem"],"published-print":{"date-parts":[[2006,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A series of novel porphyrin\u2013phthalocyanine (Por\u2010Pc) dyads <jats:bold>1<\/jats:bold>\u2013<jats:bold>3<\/jats:bold> have been synthesized by using standard methodologies for unsymmetrically substituted phthalocyanine preparation. These two chromophoric units have been directly linked for the first time, that is, without any spacer, through the \u03b2\u2010pyrrolic position of a <jats:italic>meso<\/jats:italic>\u2010tetraphenylporphyrin, thus allowing a close proximity of the two units in a rigid arrangement. For this, a novel porphyrin\u2013phthalonitrile precursor <jats:bold>4<\/jats:bold> had to be prepared. The UV\/Vis spectra indicate that the basic electronic characteristics of both individual units (i.\u2009e., porphyrin and phthalocyanine) are retained in the hybrid Por\u2010Pc molecules. The short Por\u2010Pc separation in dyads <jats:bold>1<\/jats:bold>\u2013<jats:bold>3<\/jats:bold> leads to strong excitonic coupling and ultrafast energy transfer (ca. 10<jats:sup>12<\/jats:sup> s<jats:sup>\u20131<\/jats:sup>), as determined by femtosecond transient absorption measurements, from the highly energetic <jats:sup>1<\/jats:sup>*(ZnPor) unit to the <jats:sup>1<\/jats:sup>*(ZnPc), which evolves to populate the long\u2010lived <jats:sup>3<\/jats:sup>*(ZnPc) by intersystem crossing. Interestingly, the energy transfer seems to occur more efficiently in dyads <jats:bold>2<\/jats:bold> and <jats:bold>3<\/jats:bold>, which have smaller HOMO\u2013LUMO energy gaps. (\u00a9 Wiley\u2010VCH Verlag GmbH &amp; Co. KGaA, 69451 Weinheim, Germany, 2006)<\/jats:p>","DOI":"10.1002\/ejoc.200500558","type":"journal-article","created":{"date-parts":[[2005,11,16]],"date-time":"2005-11-16T16:27:02Z","timestamp":1132158422000},"page":"257-267","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":52,"title":["Synthesis and Photophysical Studies of New Porphyrin\u2013Phthalocyanine Dyads with Hindered Rotation"],"prefix":"10.1002","volume":"2006","author":[{"given":"Jo\u00e3o P. C.","family":"Tom\u00e9","sequence":"first","affiliation":[]},{"given":"Ana M. V. M.","family":"Pereira","sequence":"additional","affiliation":[]},{"given":"Cristina M. A.","family":"Alonso","sequence":"additional","affiliation":[]},{"given":"Maria G. P. M. S.","family":"Neves","sequence":"additional","affiliation":[]},{"given":"Augusto C.","family":"Tom\u00e9","sequence":"additional","affiliation":[]},{"given":"Artur M. 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