{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,9,30]],"date-time":"2023-09-30T05:41:03Z","timestamp":1696052463768},"reference-count":35,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,11,28]],"date-time":"2013-11-28T00:00:00Z","timestamp":1385596800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Photochem &amp; Photobiology"],"published-print":{"date-parts":[[2014,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We synthesized two molecular systems, in which an endofullerene C<jats:sub>60<\/jats:sub>, incarcerating one hydrogen molecule (H<jats:sub>2<\/jats:sub>@C<jats:sub>60<\/jats:sub>) and a nitroxide radical are connected by a folded 3<jats:sub>10<\/jats:sub>\u2010helical peptide. The difference between the two molecules is the direction of the peptide orientation. The nuclear spin relaxation rates and the <jats:italic>para \u2192 ortho<\/jats:italic> conversion rate of the incarcerated hydrogen molecule were determined by <jats:sup>1<\/jats:sup>H <jats:styled-content style=\"fixed-case\">NMR<\/jats:styled-content> spectroscopy. The experimental results were analyzed using <jats:styled-content style=\"fixed-case\">DFT<\/jats:styled-content>\u2010optimized molecular models. The relaxation rates and the conversion rates of the two peptides fall in the expected distance range. One of the two peptides is particularly rigid and thus ideal to keep the H<jats:sub>2<\/jats:sub>@C<jats:sub>60<\/jats:sub>\/nitroxide separation, <jats:italic>r<\/jats:italic>, as large and controlled as possible, which results in particularly low relaxation and conversion rates. Despite the very similar optimized distance, however, the rates measured with the other peptide are considerably higher and thus are compatible with a shorter effective distance. The results strengthen the outcome of previous investigations that while the <jats:italic>para \u2192 ortho<\/jats:italic> conversion rates satisfactorily obey the Wigner's theory, the nuclear spin relaxation rates are in excellent agreement with the Solomon\u2013Bloembergen equation predicting a 1\/<jats:italic>r<\/jats:italic><jats:sup>6<\/jats:sup> dependence.<\/jats:p>","DOI":"10.1111\/php.12191","type":"journal-article","created":{"date-parts":[[2013,10,17]],"date-time":"2013-10-17T18:30:57Z","timestamp":1382034657000},"page":"439-447","source":"Crossref","is-referenced-by-count":3,"title":["Interaction of H<sub>2<\/sub>@C<sub>60<\/sub> and Nitroxide through Conformationally Constrained Peptide Bridges"],"prefix":"10.1111","volume":"90","author":[{"given":"Luca","family":"Garbuio","sequence":"first","affiliation":[{"name":"Department of Chemistry University of Padova Padova Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongjun","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Chemistry Columbia University New York NY"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sabrina","family":"Antonello","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Padova Padova Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 A.","family":"Gasc\u00f3n","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Connecticut Storrs CT"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ronald G.","family":"Lawler","sequence":"additional","affiliation":[{"name":"Department of Chemistry Brown University Providence RI"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuegong","family":"Lei","sequence":"additional","affiliation":[{"name":"Department of Chemistry Columbia University New York NY"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasujiro","family":"Murata","sequence":"additional","affiliation":[{"name":"Institute for Chemical Research Kyoto University Kyoto Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicholas J.","family":"Turro","sequence":"additional","affiliation":[{"name":"Department of Chemistry Columbia University New York NY"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Flavio","family":"Maran","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Padova Padova Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,11,28]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1106185"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/ar900223d"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1039\/c0cs00225a"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja076104s"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja206383n"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsta.2011.0628"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsta.2012.0490"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsta.2012.0475"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja305704n"},{"key":"e_1_2_6_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/jz100645w"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRev.99.559"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.1731684"},{"key":"e_1_2_6_14_1","doi-asserted-by":"publisher","DOI":"10.1021\/jz200192s"},{"key":"e_1_2_6_15_1","first-page":"28","article-title":"Concerning the paramagnetic conversion of para\u2010ortho Hydrogen","volume":"23","author":"Wigner E. 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