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Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands

Three iron(II) complexes with conjugated multidonor ligands (L1 and L2) studied as thermally stable magnetic and thermoelectric materials were Fe-2(CH3COO)(4)(L1)(2) (1), Fe(L1)(3)(BF4)(2)center dot 4H(2)O (2), and {Fe-2(CH3COO)(4)(L2)center dot 2H(2)O}(n) (3). These complexes have low optical band...

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Main Authors:	Abdullah, Norbani, Elsheikh, Mohamed Hamid, Ibrahim, Nik Muhd Jazli Nik, Said, Suhana Mohd, Sabri, Mohd Faizul Mohd, Masjuki, Haji Hassan, Marlina, Anita
Format:	Article
Language:	English
Published:	Royal Society of Chemistry 2015
Subjects:	Q Science (General) QD Chemistry T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.um.edu.my/15755/1/Magnetic%2C_thermal%2C_mesomorphic_and_thermoelectric_properties_of_mononuclear%2C.pdf http://eprints.um.edu.my/15755/ http://pubs.rsc.org/en/content/articlepdf/2015/ra/c5ra07100c
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spelling	my.um.eprints.157552018-10-19T02:39:53Z http://eprints.um.edu.my/15755/ Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands Abdullah, Norbani Elsheikh, Mohamed Hamid Ibrahim, Nik Muhd Jazli Nik Said, Suhana Mohd Sabri, Mohd Faizul Mohd Masjuki, Haji Hassan Marlina, Anita Q Science (General) QD Chemistry T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering Three iron(II) complexes with conjugated multidonor ligands (L1 and L2) studied as thermally stable magnetic and thermoelectric materials were Fe-2(CH3COO)(4)(L1)(2) (1), Fe(L1)(3)(BF4)(2)center dot 4H(2)O (2), and {Fe-2(CH3COO)(4)(L2)center dot 2H(2)O}(n) (3). These complexes have low optical band gaps (1.9 eV for 1 and 2, and 2.2 eV for 3) and were magnetic with 57% high-spin Fe(II) in 1, 33% in 2, and 100% in 3 at 25 degrees C. Complex 1 melted at 57.2 degrees C and exhibited mesomorphism, while 2 melted at 96.9 degrees C, defining it as an ionic liquid. The thermal stabilities of 1 (T-dec = 199 degrees C) and 3 (T-dec = 191 degrees C) were lower than 2 (T-dec = 248 degrees C). Their Seebeck coefficients, S-e (in mV K-1) were -0.65 for 1, -0.54 for 2, and +0.25 for 3, identifying them as potential thermoelectric materials. Complex 1 formed stable thin films on quartz by the spin coating technique. The films formed at aging time t = 0 (F1) and t = 7 days (F2) were made up of monomers of 1. The optical band gaps of the films (1.39 eV for F1 and 1.57 eV for F2) were lower than 1. The films were free of cracks and have a fairly homogeneous morphology. The films with the best morphology were F1 annealed at 40 degrees C and F2 annealed at 60 degrees C. Royal Society of Chemistry 2015 Article PeerReviewed application/pdf en http://eprints.um.edu.my/15755/1/Magnetic%2C_thermal%2C_mesomorphic_and_thermoelectric_properties_of_mononuclear%2C.pdf Abdullah, Norbani and Elsheikh, Mohamed Hamid and Ibrahim, Nik Muhd Jazli Nik and Said, Suhana Mohd and Sabri, Mohd Faizul Mohd and Masjuki, Haji Hassan and Marlina, Anita (2015) Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands. RSC Advances, 5 (63). pp. 50999-51007. ISSN 2046-2069 http://pubs.rsc.org/en/content/articlepdf/2015/ra/c5ra07100c doi:10.1039/c5ra07100c
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/
language	English
topic	Q Science (General) QD Chemistry T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	Q Science (General) QD Chemistry T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TK Electrical engineering. Electronics Nuclear engineering Abdullah, Norbani Elsheikh, Mohamed Hamid Ibrahim, Nik Muhd Jazli Nik Said, Suhana Mohd Sabri, Mohd Faizul Mohd Masjuki, Haji Hassan Marlina, Anita Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
description	Three iron(II) complexes with conjugated multidonor ligands (L1 and L2) studied as thermally stable magnetic and thermoelectric materials were Fe-2(CH3COO)(4)(L1)(2) (1), Fe(L1)(3)(BF4)(2)center dot 4H(2)O (2), and {Fe-2(CH3COO)(4)(L2)center dot 2H(2)O}(n) (3). These complexes have low optical band gaps (1.9 eV for 1 and 2, and 2.2 eV for 3) and were magnetic with 57% high-spin Fe(II) in 1, 33% in 2, and 100% in 3 at 25 degrees C. Complex 1 melted at 57.2 degrees C and exhibited mesomorphism, while 2 melted at 96.9 degrees C, defining it as an ionic liquid. The thermal stabilities of 1 (T-dec = 199 degrees C) and 3 (T-dec = 191 degrees C) were lower than 2 (T-dec = 248 degrees C). Their Seebeck coefficients, S-e (in mV K-1) were -0.65 for 1, -0.54 for 2, and +0.25 for 3, identifying them as potential thermoelectric materials. Complex 1 formed stable thin films on quartz by the spin coating technique. The films formed at aging time t = 0 (F1) and t = 7 days (F2) were made up of monomers of 1. The optical band gaps of the films (1.39 eV for F1 and 1.57 eV for F2) were lower than 1. The films were free of cracks and have a fairly homogeneous morphology. The films with the best morphology were F1 annealed at 40 degrees C and F2 annealed at 60 degrees C.
format	Article
author	Abdullah, Norbani Elsheikh, Mohamed Hamid Ibrahim, Nik Muhd Jazli Nik Said, Suhana Mohd Sabri, Mohd Faizul Mohd Masjuki, Haji Hassan Marlina, Anita
author_facet	Abdullah, Norbani Elsheikh, Mohamed Hamid Ibrahim, Nik Muhd Jazli Nik Said, Suhana Mohd Sabri, Mohd Faizul Mohd Masjuki, Haji Hassan Marlina, Anita
author_sort	Abdullah, Norbani
title	Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
title_short	Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
title_full	Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
title_fullStr	Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
title_full_unstemmed	Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands
title_sort	magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(ii) complexes with conjugated ligands
publisher	Royal Society of Chemistry
publishDate	2015
url	http://eprints.um.edu.my/15755/1/Magnetic%2C_thermal%2C_mesomorphic_and_thermoelectric_properties_of_mononuclear%2C.pdf http://eprints.um.edu.my/15755/ http://pubs.rsc.org/en/content/articlepdf/2015/ra/c5ra07100c
_version_	1643690128078536704
score	13.211869

Magnetic, thermal, mesomorphic and thermoelectric properties of mononuclear, dimeric and polymeric iron(II) complexes with conjugated ligands

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