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Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting

Self-assembly of chlorophyll-a (Chl-a) molecules within a protein environment serves as the key factor behind controlled and efficient light energy harvesting in natural photosystems. Long-range ordering among supramolecular structures in terms of spin–orbit coupling and edge effect helps in untrapp...

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Autores principales: Mandal, Pubali, Manna, Jhimli S., Das, Debmallya, Maiti, Ramaprasad, Mitra, Manoj K., Chakravorty, Dipankar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9083083/
https://www.ncbi.nlm.nih.gov/pubmed/35541073
http://dx.doi.org/10.1039/c8ra04612c
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author Mandal, Pubali
Manna, Jhimli S.
Das, Debmallya
Maiti, Ramaprasad
Mitra, Manoj K.
Chakravorty, Dipankar
author_facet Mandal, Pubali
Manna, Jhimli S.
Das, Debmallya
Maiti, Ramaprasad
Mitra, Manoj K.
Chakravorty, Dipankar
author_sort Mandal, Pubali
collection PubMed
description Self-assembly of chlorophyll-a (Chl-a) molecules within a protein environment serves as the key factor behind controlled and efficient light energy harvesting in natural photosystems. Long-range ordering among supramolecular structures in terms of spin–orbit coupling and edge effect helps in untrapping of excitons in the disordered energy landscape. Mimicking the photosynthetic machinery would give a new paradigm for organic photovoltaic material design where a large amount of disorder exists. In this paper, we report the experimental evidence of room temperature magnetic domain wall formation and edge effect along with spin flop canting in self-assembled Chl-a within hydrogel matrix via SQUID magnetometry. This was further correlated with intermolecular coupling and exciton delocalization through specific arrangements of self-assembly as evident from NMR spectral and photophysical characteristics. The data cumulatively suggest electronic backscattering protection which is also substantiated by the ferroelectric behavior coming from coexisting symmetry lowering. Here the polarization evolves through primary distribution of π electronic density along with a photoresponsive IV loop, similar to the photoprotection of photosynthesis. This work thus proposes a promising design principle for room temperature Chl-a based biomimetic systems efficient in photoharnessing.
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spelling pubmed-90830832022-05-09 Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting Mandal, Pubali Manna, Jhimli S. Das, Debmallya Maiti, Ramaprasad Mitra, Manoj K. Chakravorty, Dipankar RSC Adv Chemistry Self-assembly of chlorophyll-a (Chl-a) molecules within a protein environment serves as the key factor behind controlled and efficient light energy harvesting in natural photosystems. Long-range ordering among supramolecular structures in terms of spin–orbit coupling and edge effect helps in untrapping of excitons in the disordered energy landscape. Mimicking the photosynthetic machinery would give a new paradigm for organic photovoltaic material design where a large amount of disorder exists. In this paper, we report the experimental evidence of room temperature magnetic domain wall formation and edge effect along with spin flop canting in self-assembled Chl-a within hydrogel matrix via SQUID magnetometry. This was further correlated with intermolecular coupling and exciton delocalization through specific arrangements of self-assembly as evident from NMR spectral and photophysical characteristics. The data cumulatively suggest electronic backscattering protection which is also substantiated by the ferroelectric behavior coming from coexisting symmetry lowering. Here the polarization evolves through primary distribution of π electronic density along with a photoresponsive IV loop, similar to the photoprotection of photosynthesis. This work thus proposes a promising design principle for room temperature Chl-a based biomimetic systems efficient in photoharnessing. The Royal Society of Chemistry 2018-07-24 /pmc/articles/PMC9083083/ /pubmed/35541073 http://dx.doi.org/10.1039/c8ra04612c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Mandal, Pubali
Manna, Jhimli S.
Das, Debmallya
Maiti, Ramaprasad
Mitra, Manoj K.
Chakravorty, Dipankar
Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title_full Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title_fullStr Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title_full_unstemmed Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title_short Magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
title_sort magnetic response of chlorophyll self-assembly within hydrogel: a mechanistic approach towards enhanced photoharvesting
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9083083/
https://www.ncbi.nlm.nih.gov/pubmed/35541073
http://dx.doi.org/10.1039/c8ra04612c
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