Enhanced catalytic activity of Fe phthalocyanines linked to Au(111) via conjugated self-assembled monolayers of aromatic thiols for O2 reduction

Ponce, Ingrid; Silva, J. Francisco; Oñate, Rubén; Rezende, Marcos Caroli; Páez, Maritza; Pavez, Jorge; Zagal, José H.

doi:10.1016/j.elecom.2011.08.050

Cited by 31 publications

(19 citation statements)

References 22 publications

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“…Communications atom of MPY. [37,38] TheFePc and MPY interacted with the Ag NPs as an integral whole,a nd the FePc molecule was thus parallel to the surface of the Ag NPs substrate.O nly the modes of out-of-plane vibrations of FePc was selectively enhanced and observed based on SERS selection rules, [20,39] such as the intense bands at 592, 683, 748, and 837 cm À1 (see the Supporting Information, Table S2 for ad etailed assignment of FePc). [40,41] As triking change was observed in the relative intensities of the C = Cstretching modes of MPY in the region of 1530-1650 cm À1 .T he evident decrease of the b 2 mode but the marked increase of the a 1 mode in the SERS spectrum demonstrated that the CT process from the Ag to the MPY was suppressed in the Ag-MPY-FePc system under this condition.…”

Section: Angewandte Chemiementioning

confidence: 99%

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

et al. 2019

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Interfacial charge transfer (CT) is of interest owing to its effect on the performance of molecular photovoltaic (PV) devices. The characteristics and structures of interfacial materials, such as TiO2 nanoparticles (NPs) in some solar cells, are employed to adjust the CT process. In this study, three kinds of interfacial systems, including a solar cell‐like TiO2‐Ag‐ p‐mercaptopyridine (MPY)‐ iron phthalocyanine (FePc) system, are compared to investigate the interfacial CT process using surface‐enhanced Raman scattering (SERS) spectroscopy. The SERS results show the significance of TiO2 NPs in the system on altering the direction and path of the interfacial CT, which is closely associated with the CT enhancement contribution to SERS in such an interfacial system. SERS spectroscopy is expected to be a promising technique for the exploration and estimation of the interfacial CT behavior in PV devices, which may further extend the applications of SERS in the field of solar cells.

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Section: Angewandte Chemiementioning

confidence: 99%

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

et al. 2019

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“…41 On the other hand, this allows the possibility to access towards finite fcc fragments made of group 11 elements, for further understanding the size-dependent behavior and properties of a few atoms section of group 11 M(111) surfaces, which are widely employed as active supporting surfaces. [42][43][44][45][46] 4…”

Section: +1mentioning

confidence: 99%

[M₁₆Ni₂₄(CO)₄₀]^4–: Coinage Metal Tetrahedral Superatoms as Useful Building Blocks Related to Pyramidal Au₂₀ Clusters (M = Cu, Ag, Au). Electronic and Bonding Properties from Relativistic DFT Calculations

et al. 2018

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Characterization of the tetrahedral Au 20 structure in the gas-phase remains as a major landmark in gold cluster chemistry, where further efforts to stabilize this bare 20-electron superatom in solution, to extend and understand its chemistry have failed so far. Here, we account for the structural, electronic and bonding properties of [M 16 Ni 24 (CO) 40 ] 4-(M = Cu, Ag, Au) observed in solution for gold and silver. Our results show a direct electronic relationship with Au 20 , owing that such species share a common tetrahedral [M 16 ] 4central core with a 1S 2 1P 6 1D 10 2S 2 jellium configuration. In the case of Au 20 , the [Au 16 ] 4core is capped by four Au + ions, whereas in [M 16 Ni 24 (CO) 40 ] 4it is capped by four Ni 6 (CO) 10 units. In both cases, the capping entities are full part of the superatom entity where appears that the free (uncapped) [M 16 ] 4species requires to be capped for further stabilization. It follows that the Ni 6 (CO) 10 units in [M 16 Ni 24 (CO) 40 ] 4should not be considered as external ligands as their bonding with the [M 16 ] 4core is mainly associated with a delocalization of the 20 jellium electrons onto the Ni atoms. Thus, the [M 16 Ni 24 (CO) 40 ] 4species can be seen as the solution version of tetrahedral M 20 clusters, encouraging experimental efforts to further develop the chemistry of such complexes as M(111) finite surface section structures, with M=Ag and Au and, and particularly promising with M=Cu. Furthermore, optical properties were simulated to assist future experimental characterization. Relevant computed data for [M 16 ] 4and [M 20 ] clusters (M=Cu, Ag, Au) of jellium configuration 1S 2 1P 6 1D 10 2S 2 , and Kohn-Sham jellium orbitals of [Au ] 4and [Au 20 ]. Major electronic absorption for [M 16 Ni 24 (CO) 40 ] 4-(M = Cu, Ag, Au) computed at the PBE and BP86 levels. This material is available free of charge via the Internet at http://pubs.acs.org.

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“…Zuschriften atom of MPY. [37,38] TheFePc and MPY interacted with the Ag NPs as an integral whole,a nd the FePc molecule was thus parallel to the surface of the Ag NPs substrate.O nly the modes of out-of-plane vibrations of FePc was selectively enhanced and observed based on SERS selection rules, [20,39] such as the intense bands at 592, 683, 748, and 837 cm À1 (see the Supporting Information, Table S2 for ad etailed assignment of FePc). [40,41] As triking change was observed in the relative intensities of the C = Cstretching modes of MPY in the region of 1530-1650 cm À1 .T he evident decrease of the b 2 mode but the marked increase of the a 1 mode in the SERS spectrum demonstrated that the CT process from the Ag to the MPY was suppressed in the Ag-MPY-FePc system under this condition.…”

Section: Angewandte Chemiementioning

confidence: 99%

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

et al. 2019

View full text Add to dashboard Cite

Interfacial charge transfer (CT) is of interest owing to its effect on the performance of molecular photovoltaic (PV) devices.T he characteristics and structures of interfacial materials,s uch as TiO 2 nanoparticles (NPs) in some solar cells,are employed to adjust the CT process.Inthis study,three kinds of interfacial systems,i ncluding as olar cell-like TiO 2 -Ag-p-mercaptopyridine (MPY)-iron phthalocyanine (FePc) system, are compared to investigate the interfacial CT process using surface-enhanced Raman scattering (SERS) spectroscopy.The SERS results show the significance of TiO 2 NPs in the system on altering the direction and path of the interfacial CT, which is closely associated with the CT enhancement contribution to SERS in such an interfacial system. SERS spectroscopyi se xpected to be ap romising technique for the exploration and estimation of the interfacial CT behavior in PV devices,which may further extend the applications of SERS in the field of solar cells.

show abstract

Enhanced catalytic activity of Fe phthalocyanines linked to Au(111) via conjugated self-assembled monolayers of aromatic thiols for O2 reduction

Cited by 31 publications

References 22 publications

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

[M₁₆Ni₂₄(CO)₄₀]^4–: Coinage Metal Tetrahedral Superatoms as Useful Building Blocks Related to Pyramidal Au₂₀ Clusters (M = Cu, Ag, Au). Electronic and Bonding Properties from Relativistic DFT Calculations

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

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Enhanced catalytic activity of Fe phthalocyanines linked to Au(111) via conjugated self-assembled monolayers of aromatic thiols for O2 reduction

Cited by 31 publications

References 22 publications

Effect of TiO2 on Altering Direction of Interfacial Charge Transfer in a TiO2‐Ag‐MPY‐FePc System by SERS

Effect of TiO2 on Altering Direction of Interfacial Charge Transfer in a TiO2‐Ag‐MPY‐FePc System by SERS

[M16Ni24(CO)40]4–: Coinage Metal Tetrahedral Superatoms as Useful Building Blocks Related to Pyramidal Au20 Clusters (M = Cu, Ag, Au). Electronic and Bonding Properties from Relativistic DFT Calculations

Effect of TiO2 on Altering Direction of Interfacial Charge Transfer in a TiO2‐Ag‐MPY‐FePc System by SERS

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Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS

[M₁₆Ni₂₄(CO)₄₀]^4–: Coinage Metal Tetrahedral Superatoms as Useful Building Blocks Related to Pyramidal Au₂₀ Clusters (M = Cu, Ag, Au). Electronic and Bonding Properties from Relativistic DFT Calculations

Effect of TiO₂ on Altering Direction of Interfacial Charge Transfer in a TiO₂‐Ag‐MPY‐FePc System by SERS