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Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials

In this work, we present a spin-crossover (SCO) complex molecular formulation Fe(L-n)(2)](BF4)(2) in an electrochemical single couple solution. A Seebeck voltage arises when an electrochemical single couple solution is subjected to a temperature difference, resulting in a single couple reaction at e...

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Main Authors: Che Hassan, Hazirah, Mohd Said, Suhana, Nik Ibrahim, Nik Muhd Jazli, Megat Hasnan, Megat Muhammad Ikhsan, Mohd Noor, Ikhwan Syafiq, Zakaria, Rozalina, Mohd Salleh, Mohd Faiz, Md. Noor, Nur Linahafizza, Abdullah, Norbani
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Published: Royal Society of Chemistry 2021
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QD Chemistry
Online Access:http://eprints.um.edu.my/34165/
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spelling my.um.eprints.341652022-09-06T04:05:53Z http://eprints.um.edu.my/34165/ Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials Che Hassan, Hazirah Mohd Said, Suhana Nik Ibrahim, Nik Muhd Jazli Megat Hasnan, Megat Muhammad Ikhsan Mohd Noor, Ikhwan Syafiq Zakaria, Rozalina Mohd Salleh, Mohd Faiz Md. Noor, Nur Linahafizza Abdullah, Norbani QD Chemistry In this work, we present a spin-crossover (SCO) complex molecular formulation Fe(L-n)(2)](BF4)(2) in an electrochemical single couple solution. A Seebeck voltage arises when an electrochemical single couple solution is subjected to a temperature difference, resulting in a single couple reaction at either terminal of the electrochemical cell. The ultrahigh Seebeck coefficients were obtained due to a number of molecular optimisation strategies. The Fe(L-16)(2)](BF4)(2) complex demonstrated a maximum Seebeck coefficient of 8.67 mV K-1, achieved through a six-pronged approach to maximise entropy during the transition from low spin (LS) to high spin (HS) through: (i) a change in spin state, (ii) a change in physical liquid crystalline state, (iii) the spin Seebeck effect, (iv) the kosmotropic and chaotropic effect, (v) the fastener effect and (vi) thermal heat absorbance. A reduction of the Seebeck coefficient to 1.68 mV K-1 during the HS-LS transition at higher temperatures is related to the single spin state transition entropy change. In summary, this paper presents a systematic study to identify the contributing factors in the production of a sensor with an ultrahigh Seebeck coefficient for energy harvesting through the optimisation of its molecular entropy elements. Royal Society of Chemistry 2021-06-23 Article PeerReviewed Che Hassan, Hazirah and Mohd Said, Suhana and Nik Ibrahim, Nik Muhd Jazli and Megat Hasnan, Megat Muhammad Ikhsan and Mohd Noor, Ikhwan Syafiq and Zakaria, Rozalina and Mohd Salleh, Mohd Faiz and Md. Noor, Nur Linahafizza and Abdullah, Norbani (2021) Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials. RSC Advances, 11 (34). pp. 20970-20982. ISSN 2046-2069, DOI https://doi.org/10.1039/d1ra01387d <https://doi.org/10.1039/d1ra01387d>. 10.1039/d1ra01387d
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Che Hassan, Hazirah
Mohd Said, Suhana
Nik Ibrahim, Nik Muhd Jazli
Megat Hasnan, Megat Muhammad Ikhsan
Mohd Noor, Ikhwan Syafiq
Zakaria, Rozalina
Mohd Salleh, Mohd Faiz
Md. Noor, Nur Linahafizza
Abdullah, Norbani
Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
description In this work, we present a spin-crossover (SCO) complex molecular formulation Fe(L-n)(2)](BF4)(2) in an electrochemical single couple solution. A Seebeck voltage arises when an electrochemical single couple solution is subjected to a temperature difference, resulting in a single couple reaction at either terminal of the electrochemical cell. The ultrahigh Seebeck coefficients were obtained due to a number of molecular optimisation strategies. The Fe(L-16)(2)](BF4)(2) complex demonstrated a maximum Seebeck coefficient of 8.67 mV K-1, achieved through a six-pronged approach to maximise entropy during the transition from low spin (LS) to high spin (HS) through: (i) a change in spin state, (ii) a change in physical liquid crystalline state, (iii) the spin Seebeck effect, (iv) the kosmotropic and chaotropic effect, (v) the fastener effect and (vi) thermal heat absorbance. A reduction of the Seebeck coefficient to 1.68 mV K-1 during the HS-LS transition at higher temperatures is related to the single spin state transition entropy change. In summary, this paper presents a systematic study to identify the contributing factors in the production of a sensor with an ultrahigh Seebeck coefficient for energy harvesting through the optimisation of its molecular entropy elements.
format Article
author Che Hassan, Hazirah
Mohd Said, Suhana
Nik Ibrahim, Nik Muhd Jazli
Megat Hasnan, Megat Muhammad Ikhsan
Mohd Noor, Ikhwan Syafiq
Zakaria, Rozalina
Mohd Salleh, Mohd Faiz
Md. Noor, Nur Linahafizza
Abdullah, Norbani
author_facet Che Hassan, Hazirah
Mohd Said, Suhana
Nik Ibrahim, Nik Muhd Jazli
Megat Hasnan, Megat Muhammad Ikhsan
Mohd Noor, Ikhwan Syafiq
Zakaria, Rozalina
Mohd Salleh, Mohd Faiz
Md. Noor, Nur Linahafizza
Abdullah, Norbani
author_sort Che Hassan, Hazirah
title Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
title_short Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
title_full Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
title_fullStr Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
title_full_unstemmed Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials
title_sort ultra-high seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of fe(ii) spin-crossover (sco) materials
publisher Royal Society of Chemistry
publishDate 2021
url http://eprints.um.edu.my/34165/
_version_ 1744649160889466880
score 13.211869

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