Triplet Excitons Quenching By Doublet Centers in a Nanoreactor with an External Magnetic Field
The process of spin-selective quenching of a triplet (T) exciton by a fixed spin doublet (D) center in an organic semiconductor nanoparticle (anthracene, tetracene, MEH–PPV) was studied. Random walks of the T-exciton in a spherical nanovolume of a crystal or polymer globule were modeled based on the...
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| Veröffentlicht in: | Journal of applied spectroscopy 2021-05, Vol.88 (2), p.265-273 |
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| creator | Kucherenko, M. G. Penkov, S. A. |
| description | The process of spin-selective quenching of a triplet (T) exciton by a fixed spin doublet (D) center in an organic semiconductor nanoparticle (anthracene, tetracene, MEH–PPV) was studied. Random walks of the T-exciton in a spherical nanovolume of a crystal or polymer globule were modeled based on the solution of the Neumann boundary diffusion condition. Time dependences of the spin-nonselective quenching rate of T-excitations were calculated for different values of geometric and diffusion parameters. Taking into account the spin dynamics of T–D-pair reagents allowed calculating magnetic field effects of T–D-quenching rate, which showed a strong influence of the nanoparticles size and initial position of the T-exciton and doublet sink on the absolute value of the effect. The obtained radial dependences of the magnetic field modulation of the quenching efficiency can be approximated by a superposition of two exponents. |
| doi_str_mv | 10.1007/s10812-021-01168-6 |
| format | Article |
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Taking into account the spin dynamics of T–D-pair reagents allowed calculating magnetic field effects of T–D-quenching rate, which showed a strong influence of the nanoparticles size and initial position of the T-exciton and doublet sink on the absolute value of the effect. The obtained radial dependences of the magnetic field modulation of the quenching efficiency can be approximated by a superposition of two exponents.</description><subject>Analytical Chemistry</subject><subject>Anthracene</subject><subject>Atomic/Molecular Structure and Spectra</subject><subject>Chemical tests and reagents</subject><subject>Diffusion rate</subject><subject>Excitons</subject><subject>Magnetic fields</subject><subject>Nanoparticles</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Quenching</subject><subject>Random walk</subject><subject>Reagents</subject><subject>Semiconductors</subject><subject>Spin dynamics</subject><issn>0021-9037</issn><issn>1573-8647</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kU1LHTEUhoNU6K3tH-gq4MrFaD5mMpmlvdUqaEVrtw2ZzMkYGZPbJIP675vrFMSNZHEg7_McDrwIfaXkkBLSHiVKJGUVYbQilApZiR20ok3LKynq9gNakW3UEd5-RJ9SuieEdJKRFfpzG91mgoxPnozLwSd8PYM3d86P-Nsz_h7mfpuuwWeICTuPNf6pfYigTQ4RP7p8h7Uvesm9nvClHj1kZ_Cpg2n4jHatnhJ8-T_30O_Tk9v1WXVx9eN8fXxRGd6xXFFroGdsaNuOGcFYW9tWN6K2va0NM30vBKNDLxotB1MPdSeA215LTgmvhWz4Htpf9m5i-DtDyuo-zNt7kmINE7IuS3mhDhdq1BMo523IUZvyBnhwJniwrvwfC8mKxDpahIM3QmEyPOVRzymp8183b1m2sCaGlCJYtYnuQcdnRYnalqSWklRpQr2UpESR-CKlAvsR4uvd71j_AAgikvs</recordid><startdate>20210501</startdate><enddate>20210501</enddate><creator>Kucherenko, M. 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A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c392t-1fceb22d7792c62274f7a564fbf4c2cbb6621db65a8dc4d496e3fba8310346853</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Analytical Chemistry</topic><topic>Anthracene</topic><topic>Atomic/Molecular Structure and Spectra</topic><topic>Chemical tests and reagents</topic><topic>Diffusion rate</topic><topic>Excitons</topic><topic>Magnetic fields</topic><topic>Nanoparticles</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Quenching</topic><topic>Random walk</topic><topic>Reagents</topic><topic>Semiconductors</topic><topic>Spin dynamics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kucherenko, M. G.</creatorcontrib><creatorcontrib>Penkov, S. 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Random walks of the T-exciton in a spherical nanovolume of a crystal or polymer globule were modeled based on the solution of the Neumann boundary diffusion condition. Time dependences of the spin-nonselective quenching rate of T-excitations were calculated for different values of geometric and diffusion parameters. Taking into account the spin dynamics of T–D-pair reagents allowed calculating magnetic field effects of T–D-quenching rate, which showed a strong influence of the nanoparticles size and initial position of the T-exciton and doublet sink on the absolute value of the effect. The obtained radial dependences of the magnetic field modulation of the quenching efficiency can be approximated by a superposition of two exponents.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10812-021-01168-6</doi><tpages>9</tpages></addata></record> |
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| subjects | Analytical Chemistry Anthracene Atomic/Molecular Structure and Spectra Chemical tests and reagents Diffusion rate Excitons Magnetic fields Nanoparticles Physics Physics and Astronomy Quenching Random walk Reagents Semiconductors Spin dynamics |
| title | Triplet Excitons Quenching By Doublet Centers in a Nanoreactor with an External Magnetic Field |
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