Electron vs Energy Transfer in Arrays Featuring Two Bodipy Chromophores Axially Bound to a Sn(IV) Porphyrin via a Phenolate or Benzoate Bridge
| dc.contributor.author | Lazarides, T. | en |
| dc.contributor.author | Kuhri, S. | en |
| dc.contributor.author | Charalambidis, G. | en |
| dc.contributor.author | Panda, M. K. | en |
| dc.contributor.author | Guldi, D. M. | en |
| dc.contributor.author | Coutsolelos, A. G. | en |
| dc.date.accessioned | 2015-11-24T16:57:39Z | |
| dc.date.available | 2015-11-24T16:57:39Z | |
| dc.identifier.issn | 0020-1669 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/10602 | |
| dc.rights | Default Licence | - |
| dc.subject | sensitized solar-cells | en |
| dc.subject | polarizable continuum model | en |
| dc.subject | crystal-structures | en |
| dc.subject | photophysical properties | en |
| dc.subject | transfer mechanisms | en |
| dc.subject | hydrogen-evolution | en |
| dc.subject | redox potentials | en |
| dc.subject | solvent polarity | en |
| dc.subject | quantum yields | en |
| dc.subject | complexes | en |
| dc.title | Electron vs Energy Transfer in Arrays Featuring Two Bodipy Chromophores Axially Bound to a Sn(IV) Porphyrin via a Phenolate or Benzoate Bridge | en |
| heal.abstract | In this report we describe the synthesis of multichromophore arrays consisting of two Bodipy units axially bound to a Sn(IV) porphyrin center either via a phenolate (3) or via a carboxylate (6) functionality. Absorption spectra and electrochemical studies show that the Bodipy and porphyrin chromophores interact weakly in the ground state. However, steady-state emission and excitation spectra at room temperature reveal that fluorescence from both the Bodipy and the porphyrin of 3 are strongly quenched suggesting that, in the excited state, energy and/or electron transfer might occur. Indeed, as transient absorption experiments show, selective excitation of Bodipy in 3 results in a rapid decay (tau approximate to 2 ps) of the Bodipy-based singlet excited state and a concomitant rise of a charge-separated state evolving from the porphyrin-based singlet excited state. In contrast, room-temperature emission studies on 6 show strong quenching of the Bodipy-based fluorescence leading to sensitized emission from the porphyrin moiety due to a transduction of the singlet excited state energy from Bodipy to the porphyrin. Emission experiments at 77 K in frozen toluene reveal that the room-temperature electron transfer pathway observed in 3 is suppressed. Instead, Bodipy excitation in 3 and 6 results in population of the first singlet excited state of the porphyrin chromophore. Subsequently, intersystem crossing leads to the porphyrin-based triplet excited state. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1021/Ic2026472 | - |
| heal.identifier.secondary | <Go to ISI>://000302186600040 | - |
| heal.identifier.secondary | http://pubs.acs.org/doi/pdfplus/10.1021/ic2026472 | - |
| heal.journalName | Inorg Chem | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2012 | - |
| heal.publisher | American Chemical Society | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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