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We found strong dependency of the photophysical property of the dyads on the amino substitution positions of the Np chromophores in the dyads\n                    <jats:bold>1,8\u2010DaNp\u2010Rho<\/jats:bold>\n                    and\n                    <jats:bold>2,3\u2010DaNp\u2010Rho<\/jats:bold>\n                    . Nanosecond transient absorption (ns\u2010TA) spectra show the population of the\n                    <jats:sup>3<\/jats:sup>\n                    LE state (lifetime: 47 \u03bcs) for\n                    <jats:bold>2,3\u2010DaNp\u2010Rho<\/jats:bold>\n                    , however, long\u2010lived\n                    <jats:sup>3<\/jats:sup>\n                    CS state was observed (\n                    <jats:italic>\u03c4<\/jats:italic>\n                    <jats:sub>CS<\/jats:sub>\n                    =0.62\u2005\u03bcs) for\n                    <jats:bold>AQ\u2010Rho<\/jats:bold>\n                    , with a CS quantum yield of\n                    <jats:italic>\u03a6<\/jats:italic>\n                    <jats:sub>CS<\/jats:sub>\n                    =58\u2009%. Based on femtosecond transient absorption (fs\u2010TA) spectra, spin orbit charge transfer ISC (SOCT\u2010ISC) is proposed to be responsible for the formation of the triplet states. Time\u2010resolved electron paramagnetic resonance (TREPR) spectra of\n                    <jats:bold>AQ\u2010Rho<\/jats:bold>\n                    indicate the presence of two states, a\n                    <jats:sup>3<\/jats:sup>\n                    LE state with zero field splitting (ZFS)\n                    <jats:italic>D<\/jats:italic>\n                    parameter of 1400\u2005MHz and\n                    <jats:italic>E<\/jats:italic>\n                    parameter of \u2212410\u2005MHz, formed via radical pair ISC (RP\u2010ISC) and SOCT\u2010ISC mechanism; and a\n                    <jats:sup>3<\/jats:sup>\n                    CS state with the electron spin\u2010spin interaction in the regime of spin\u2010correlated radical pair (SCRP).\n                  <\/jats:p>","DOI":"10.1002\/chem.202403758","type":"journal-article","created":{"date-parts":[[2024,11,20]],"date-time":"2024-11-20T22:15:45Z","timestamp":1732140945000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Intersystem Crossing, Photo\u2010Induced Charge Separation and Regioisomer\u2010Specific Excited State Dynamics in Fully Rigid Spiro Rhodammine\u2010Naphthalene\/Anthraquinone Electron Donor\u2010Acceptor Dyads"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2543-9485","authenticated-orcid":false,"given":"Kaiyue","family":"Ye","sequence":"first","affiliation":[{"name":"State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart Materials School of Chemical Engineering Dalian University of Technology  Dalian 116024 P. 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