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, DOI https://doi.org/10.1039/c5ra07100c.
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Abstract
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.
| Item Type: | Article |
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| Funders: | Malaysia Ministry of Education: UM.C/625/1/HIR/MOHE/05; UM.C/625/1/HIR/MOHE/ENG/29, University of Malaya: RP014A-13AET; PV056-2012A; PG114-2014B |
| Additional Information: | ISI Document Delivery No.: CK5YA Times Cited: 0 Cited Reference Count: 31 Cited References: Abdullah N., 2015, SCI WORLD J, DOI 10.1155/2015/860537, DOI 10.1155/2015/860537 Abdullah N, 2015, J MATER CHEM C, V3, P2491, DOI 10.1039/c4tc02923b Abraham TJ, 2013, ENERG ENVIRON SCI, V6, P2639, DOI 10.1039/c3ee41608a Atmani C, 2010, COORDIN CHEM REV, V254, P1559, DOI 10.1016/j.ccr.2009.11.004 Bodenthin Y, 2009, COORDIN CHEM REV, V253, P2414, DOI 10.1016/j.ccr.2008.10.019 Bomben PG, 2012, COORDIN CHEM REV, V256, P1438, DOI 10.1016/j.ccr.2012.02.005 BURROWS B, 1976, J ELECTROCHEM SOC, V123, P154, DOI 10.1149/1.2132776 Bushuev MB, 2012, POLYHEDRON, V43, P81, DOI 10.1016/j.poly.2012.05.039 DEACON GB, 1980, COORDIN CHEM REV, V33, P227, DOI 10.1016/S0010-8545(00)80455-5 Dupouy G, 2009, CHEM COMMUN, P3404, DOI 10.1039/b902339a Ferrere S, 2002, INORG CHIM ACTA, V329, P79, DOI 10.1016/S0020-1693(01)00743-5 Ferrere S, 1998, J AM CHEM SOC, V120, P843, DOI 10.1021/ja973504e Ferrere S, 2000, CHEM MATER, V12, P1083, DOI 10.1021/cm990713k Gaspar AB, 2009, J MOL STRUCT, V924-26, P9, DOI 10.1016/j.molstruc.2008.11.021 Gunes S., 2008, INORG CHIM ACTA, V361, P581, DOI DOI 10.1016/J.ICA.2007.06.042 Gutlich P, 2000, CHEM SOC REV, V29, P419, DOI 10.1039/b003504l GUTLICH P, 1981, STRUCT BOND, V44, P83 Gutlich P., 2004, TOP CURR CHEM, P233 Hagfeldt A, 2010, CHEM REV, V110, P6595, DOI 10.1021/cr900356p Hagfeldt A, 2000, ACCOUNTS CHEM RES, V33, P269, DOI 10.1021/ar980112j Heider S, 2013, EUR J INORG CHEM, P2382, DOI 10.1002/ejic.201201443 Kahn O, 1999, NATURE, V399, P21, DOI 10.1038/19862 Kahn O, 1996, ACS SYM SER, V644, P298 Kahn O., 1993, MOL MAGNETISM Kang TJ, 2012, ADV FUNCT MATER, V22, P477, DOI 10.1002/adfm.201101639 Komatsu Y, 2012, EUR J INORG CHEM, P2769, DOI 10.1002/ejic.201101040 MOITA MFR, 1994, J CHEM SOC FARADAY T, V90, P2953, DOI 10.1039/ft9949002953 O'Donnell RM, 2013, INORG CHEM, V52, P6839, DOI 10.1021/ic302339a Real J. A., 1999, TRANSITION METALS SU, P51 Sekars N, 2010, RESONANCE, V15, P819 Wei RJ, 2013, EUR J INORG CHEM, P916, DOI 10.1002/ejic.201200541 Abdullah, Norbani Elsheikh, Mohamed Hamid Ibrahim, Nik Muhd Jazli Nik Said, Suhana Mohd Sabri, Mohd Faizul Mohd Hassan, Masjuki Haji Marlina, Anita Engineering, Faculty /I-7935-2015; MOHD SABRI, MOHD FAIZUL/B-9084-2010 Engineering, Faculty /0000-0002-4848-7052; MOHD SABRI, MOHD FAIZUL/0000-0001-8096-2709 Malaysia Ministry of Education UM.C/625/1/HIR/MOHE/05, UM.C/625/1/HIR/MOHE/ENG/29; University of Malaya RP014A-13AET, PV056-2012A, PG114-2014B The authors thank Malaysia Ministry of Education for High Impact Research Grants (UM.C/625/1/HIR/MOHE/05 and UM.C/625/1/HIR/MOHE/ENG/29) and University of Malaya for research grants (RP014A-13AET, PV056-2012A and PG114-2014B). 0 ROYAL SOC CHEMISTRY CAMBRIDGE RSC ADV |
| Uncontrolled Keywords: | Sensitized solar-cells; Spin-crossover; Photosensitization; tio2 |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering |
| Depositing User: | Mr Jenal S |
| Date Deposited: | 08 Apr 2016 03:01 |
| Last Modified: | 19 Oct 2018 02:39 |
| URI: | http://eprints.um.edu.my/id/eprint/15755 |
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