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Krug M, Stangel C, Zieleniewska A, Clark T, Torres T, Coutsolelos AG, Guldi DM. Combining Zinc Phthalocyanines, Oligo(p-Phenylenevinylenes), and Fullerenes to Impact Reorganization Energies and Attenuation Factors. Chemphyschem 2019; 20:2806-2815. [PMID: 31471925 DOI: 10.1002/cphc.201900780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 01/11/2023]
Abstract
A study on electron transfer in three electron donor-acceptor complexes is reported. These architectures consist of a zinc phthalocyanine (ZnPc) as the excited-state electron donor and a fullerene (C60 ) as the ground-state electron acceptor. These complexes are brought together by axial coordination at ZnPc. The key variable in our design is the length of the molecular spacer, namely, oligo-p-phenylenevinylenes. The lack of appreciable ground-state interactions is in accordance with strong excited-state interactions, as inferred from the quenching of ZnPc centered fluorescence and the presence of a short-lived fluorescence component. Full-fledged femtosecond and nanosecond transient absorption spectroscopy assays corroborated that the ZnPc ⋅ + -C60 ⋅ - charge-separated state formation comes at the expense of excited-state interactions following ZnPc photoexcitation. At a first glance, the ZnPc ⋅ + -C60 ⋅ - charge-separated state lifetime increased from 0.4 to 86.6 ns as the electron donor-acceptor separation increased from 8.8 to 29.1 Å. A closer look at the kinetics revealed that the changes in charge-separated state lifetime are tied to a decrease in the electronic coupling element from 132 to 1.2 cm-1 , an increase in the reorganization energy of charge transfer from 0.43 to 0.63 eV, and a large attenuation factor of 0.27 Å-1 .
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Affiliation(s)
- Marcel Krug
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Christina Stangel
- Department of Chemistry, University of Crete, Laboratory of Bioinorganic Chemistry, Voutes Campus, 71003, Heraklion, Crete, Greece.,Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens, 11635, Greece
| | - Anna Zieleniewska
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Timothy Clark
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
| | - Tomás Torres
- IMDEA-Nanociencia, C/Faraday, 9, Cantoblanco, 28049 -, Madrid, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Athanassios G Coutsolelos
- Department of Chemistry, University of Crete, Laboratory of Bioinorganic Chemistry, Voutes Campus, 71003, Heraklion, Crete, Greece
| | - Dirk M Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nuernberg, Egerlandstr. 3, 91058, Erlangen, Germany
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Seidenkranz DT, Pluth MD. Fluorescent Arylethynyl Hamilton Receptors for Barbiturate Sensing. J Org Chem 2019; 84:8571-8577. [DOI: 10.1021/acs.joc.9b00978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Daniel T. Seidenkranz
- Department of Chemistry and Biochemistry, Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
| | - Michael D. Pluth
- Department of Chemistry and Biochemistry, Materials Science Institute, University of Oregon, Eugene, Oregon 97403, United States
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Cuesta V, Urbani M, de la Cruz P, Welte L, Nierengarten JF, Langa F. Regioselective preparation of a bis-pyrazolinofullerene by a macrocyclization reaction. Chem Commun (Camb) 2016; 52:13205-13208. [DOI: 10.1039/c6cc06549j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A single isomer of a pyrazolinofullerene bis-adduct was prepared by tether-directed remote functionalization. This bis-adduct has a lower LUMO than C60.
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Affiliation(s)
- Virginia Cuesta
- Universidad de Castilla la Mancha
- Instituto de Nanociencia
- Nanotecnología y Materiales Moleculares (INAMOL)
- 45071-Toledo
- Spain
| | - Maxence Urbani
- Laboratoire de Chimie des Matériaux Moléculaires
- Ecole Européenne de Chimie
- Polymères et Matériaux
- Université de Strasbourg et CNRS (UMR 7509)
- 67087-Strasbourg
| | - Pilar de la Cruz
- Universidad de Castilla la Mancha
- Instituto de Nanociencia
- Nanotecnología y Materiales Moleculares (INAMOL)
- 45071-Toledo
- Spain
| | - Lorena Welte
- Universidad de Castilla la Mancha
- Instituto de Nanociencia
- Nanotecnología y Materiales Moleculares (INAMOL)
- 45071-Toledo
- Spain
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires
- Ecole Européenne de Chimie
- Polymères et Matériaux
- Université de Strasbourg et CNRS (UMR 7509)
- 67087-Strasbourg
| | - Fernando Langa
- Universidad de Castilla la Mancha
- Instituto de Nanociencia
- Nanotecnología y Materiales Moleculares (INAMOL)
- 45071-Toledo
- Spain
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