Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures
Femtosecond two-photon absorption (2PA) spectra were measured of a series of butadiynelinked zinc-porphyrin oligomers assembled in single- and double-strand linear and cyclic structures containing 6, 12 or 24 porphyrin units, in the excitation wavelength range 900–1600 nm. We observe s...
| Main Authors: | , , , , , |
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| Format: | Journal article |
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American Chemical Society
2016
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| _version_ | 1797101783817912320 |
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| author | Mikhaylov, A Kondratuk, D Cnossen, A Anderson, H Drobizhev, M Rebane, A |
| author_facet | Mikhaylov, A Kondratuk, D Cnossen, A Anderson, H Drobizhev, M Rebane, A |
| author_sort | Mikhaylov, A |
| collection | OXFORD |
| description | Femtosecond two-photon absorption (2PA) spectra were measured of a series of butadiynelinked zinc-porphyrin oligomers assembled in single- and double-strand linear and cyclic structures containing 6, 12 or 24 porphyrin units, in the excitation wavelength range 900–1600 nm. We observe strong enhancement of the 2PA cross-section in the Soret region, with maximum values up to σ2PA ~10^5 GM depending on the geometry of the construct, which we quantitatively explain in terms of a three essential energy level model and cooperative enhancement of the transition dipole moments between the states. The Zn-coordinated templatebound ring of 6 porphyrin units, which resembles some natural light-harvesting systems, results in the highest 2PA cross-section per porphyrin unit (~10^4 GM). It is remarkable that this molecule gives such strong σ2PA ,when the S₀-S₁(0-0) transition is essentially forbidden. |
| first_indexed | 2024-03-07T05:56:46Z |
| format | Journal article |
| id | oxford-uuid:eac999f1-5c65-440f-9cf5-2c40af25baa3 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:56:46Z |
| publishDate | 2016 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:eac999f1-5c65-440f-9cf5-2c40af25baa32022-03-27T11:05:00ZCooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructuresJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:eac999f1-5c65-440f-9cf5-2c40af25baa3Symplectic Elements at OxfordAmerican Chemical Society2016Mikhaylov, AKondratuk, DCnossen, AAnderson, HDrobizhev, MRebane, AFemtosecond two-photon absorption (2PA) spectra were measured of a series of butadiynelinked zinc-porphyrin oligomers assembled in single- and double-strand linear and cyclic structures containing 6, 12 or 24 porphyrin units, in the excitation wavelength range 900–1600 nm. We observe strong enhancement of the 2PA cross-section in the Soret region, with maximum values up to σ2PA ~10^5 GM depending on the geometry of the construct, which we quantitatively explain in terms of a three essential energy level model and cooperative enhancement of the transition dipole moments between the states. The Zn-coordinated templatebound ring of 6 porphyrin units, which resembles some natural light-harvesting systems, results in the highest 2PA cross-section per porphyrin unit (~10^4 GM). It is remarkable that this molecule gives such strong σ2PA ,when the S₀-S₁(0-0) transition is essentially forbidden. |
| spellingShingle | Mikhaylov, A Kondratuk, D Cnossen, A Anderson, H Drobizhev, M Rebane, A Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title | Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title_full | Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title_fullStr | Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title_full_unstemmed | Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title_short | Cooperative enhancement of two-photon absorption in self-assembled zinc-porphyrin nanostructures |
| title_sort | cooperative enhancement of two photon absorption in self assembled zinc porphyrin nanostructures |
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