{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T09:11:55Z","timestamp":1771492315872,"version":"3.50.1"},"reference-count":39,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2012,2,14]],"date-time":"2012-02-14T00:00:00Z","timestamp":1329177600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2012,3,19]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The proposed role of anthocyanins in protecting plants against excess solar radiation is consistent with the occurrence of ultrafast (5\u201325\u2005ps) excited\u2010state proton transfer as the major de\u2010excitation pathway of these molecules. However, because natural anthocyanins absorb mainly in the visible region of the spectra, with only a narrow absorption band in the UV\u2010B region, this highly efficient deactivation mechanism would essentially only protect the plant from visible light. On the other hand, ground\u2010state charge\u2010transfer complexes of anthocyanins with naturally occurring electron\u2010donor co\u2010pigments, such as hydroxylated flavones, flavonoids, and hydroxycinnamic or benzoic acids, do exhibit high UV\u2010B absorptivities that complement that of the anthocyanins. In this work, we report a comparative study of the photophysics of the naturally occurring anthocyanin cyanin, intermolecular cyanin\u2013coumaric acid complexes, and an acylated anthocyanin, that is, cyanin with a pendant coumaric ester co\u2010pigment. Both inter\u2010 and intramolecular anthocyanin\u2013co\u2010pigment complexes are shown to have ultrafast energy dissipation pathways comparable to those of model flavylium cation\u2013co\u2010pigment complexes. However, from the standpoint of photoprotection, the results indicate that the covalent attachment of co\u2010pigment molecules to the anthocyanin represents a much more efficient strategy by providing the plant with significant UV\u2010B absorption capacity and at the same time coupling this absorption to efficient energy dissipation pathways (ultrafast internal conversion of the complexed form and fast energy transfer from the excited co\u2010pigment to the anthocyanin followed by adiabatic proton transfer) that avoid net photochemical damage.<\/jats:p>","DOI":"10.1002\/chem.201102247","type":"journal-article","created":{"date-parts":[[2012,2,14]],"date-time":"2012-02-14T15:33:57Z","timestamp":1329233637000},"page":"3736-3744","source":"Crossref","is-referenced-by-count":43,"title":["Photoprotection and the Photophysics of Acylated Anthocyanins"],"prefix":"10.1002","volume":"18","author":[{"given":"Palmira","family":"Ferreira\u2005da\u2005Silva","sequence":"first","affiliation":[]},{"given":"Lu\u00edsa","family":"Paulo","sequence":"additional","affiliation":[]},{"given":"Arianna","family":"Barbafina","sequence":"additional","affiliation":[]},{"given":"Fausto","family":"Elisei","sequence":"additional","affiliation":[]},{"given":"Frank H.","family":"Quina","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nio L.","family":"Ma\u00e7anita","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2012,2,14]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1104\/pp.010063"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-8137.2002.00482.x"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1071\/FP03118"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1104\/pp.103.027631"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1155\/S1110724304406147"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1104\/pp.105.066845"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1093\/treephys\/26.5.613"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jtbi.2007.08.008"},{"key":"e_1_2_6_9_2","first-page":"314","volume":"73","author":"Steyn W. 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