Abstract
Three tetra-ferrocenylethynylpyridinyl copper complexes, L4(CuI)4 (1), L4(CuBr)2 (2), L4(CuCl)2 (3) and one ferrocenylethynylpyridinyl Ligand (L) have been investigated for their HOMO and LUMO energy levels. The band gap energy for each material has been calculated using optical absorption spectrum. Cyclic Voltammetry was used to estimate the oxidation potential and energy band diagram consequently. Cyclic voltammetry in dichloroethane showed chemically reversible multiferrocenyl oxidation signals with evidence for product electro-crystallization. We isolated the semi-oxidized products by electrodeposition onto a Pt disc electrode and investigated by scanning electron microscopy (SEM). SEM confirmed the spontaneous formation of crystalline oxidation products with distinctive morphologies for complex 1 & 3. Energy dispersive X-ray elemental analysis shows presence of hexaflurophosphate (counter-ion) with the Fe:P ratio of 2:1, and 2:1 for the electrocrystallized products of 1 and 3, respectively proposing the formulae [1]2+(PF6 -)4 and [3]2+(PF6 -)2 for the electro-crystallized products.
| Original language | English |
|---|---|
| Pages (from-to) | 149-154 |
| Number of pages | 6 |
| Journal | Energy Procedia |
| Volume | 100 |
| DOIs | |
| Publication status | Published - 1 Nov 2016 |
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Keywords
- alkynyls
- electro-deposition
- electrochemistry
- electronic material
- ferrocene
Cite this
Estimation of energy levels of self-assembled ferrocenyls and investigation of charge-driven electro-crystallization of ferricenyl materials. / Shah, Hakikulla H.; Changez, Muhammad; Singh, Vandita; Luqman, Mohammad; Ismail, Yahya; Raithby, Paul R.; Marken, Frank.
In: Energy Procedia, Vol. 100, 01.11.2016, p. 149-154.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Estimation of energy levels of self-assembled ferrocenyls and investigation of charge-driven electro-crystallization of ferricenyl materials
AU - Shah, Hakikulla H.
AU - Changez, Muhammad
AU - Singh, Vandita
AU - Luqman, Mohammad
AU - Ismail, Yahya
AU - Raithby, Paul R.
AU - Marken, Frank
PY - 2016/11/1
Y1 - 2016/11/1
N2 - Three tetra-ferrocenylethynylpyridinyl copper complexes, L4(CuI)4 (1), L4(CuBr)2 (2), L4(CuCl)2 (3) and one ferrocenylethynylpyridinyl Ligand (L) have been investigated for their HOMO and LUMO energy levels. The band gap energy for each material has been calculated using optical absorption spectrum. Cyclic Voltammetry was used to estimate the oxidation potential and energy band diagram consequently. Cyclic voltammetry in dichloroethane showed chemically reversible multiferrocenyl oxidation signals with evidence for product electro-crystallization. We isolated the semi-oxidized products by electrodeposition onto a Pt disc electrode and investigated by scanning electron microscopy (SEM). SEM confirmed the spontaneous formation of crystalline oxidation products with distinctive morphologies for complex 1 & 3. Energy dispersive X-ray elemental analysis shows presence of hexaflurophosphate (counter-ion) with the Fe:P ratio of 2:1, and 2:1 for the electrocrystallized products of 1 and 3, respectively proposing the formulae [1]2+(PF6 -)4 and [3]2+(PF6 -)2 for the electro-crystallized products.
AB - Three tetra-ferrocenylethynylpyridinyl copper complexes, L4(CuI)4 (1), L4(CuBr)2 (2), L4(CuCl)2 (3) and one ferrocenylethynylpyridinyl Ligand (L) have been investigated for their HOMO and LUMO energy levels. The band gap energy for each material has been calculated using optical absorption spectrum. Cyclic Voltammetry was used to estimate the oxidation potential and energy band diagram consequently. Cyclic voltammetry in dichloroethane showed chemically reversible multiferrocenyl oxidation signals with evidence for product electro-crystallization. We isolated the semi-oxidized products by electrodeposition onto a Pt disc electrode and investigated by scanning electron microscopy (SEM). SEM confirmed the spontaneous formation of crystalline oxidation products with distinctive morphologies for complex 1 & 3. Energy dispersive X-ray elemental analysis shows presence of hexaflurophosphate (counter-ion) with the Fe:P ratio of 2:1, and 2:1 for the electrocrystallized products of 1 and 3, respectively proposing the formulae [1]2+(PF6 -)4 and [3]2+(PF6 -)2 for the electro-crystallized products.
KW - alkynyls
KW - electro-deposition
KW - electrochemistry
KW - electronic material
KW - ferrocene
UR - http://www.scopus.com/inward/record.url?scp=85014435324&partnerID=8YFLogxK
UR - http://dx.doi.org10.1016/j.egypro.2016.10.157
UR - http://dx.doi.org10.1016/j.egypro.2016.10.157
U2 - 10.1016/j.egypro.2016.10.157
DO - 10.1016/j.egypro.2016.10.157
M3 - Article
VL - 100
SP - 149
EP - 154
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
ER -