Influence of Dissolved O2 in Organic Solvents on CuOEP Supramolecular Self-Assembly on Graphite

Yibo Hao; Robert S. Weatherup; Baran Eren; Gabor A. Somorjai; Miquel Salmeron

doi:https://doi.org/10.1021/acs.langmuir.6b01580

Influence of Dissolved O₂ in Organic Solvents on CuOEP Supramolecular Self-Assembly on Graphite

Yibo Hao, Robert S. Weatherup, Baran Eren, Gabor A. Somorjai, Miquel Salmeron

Research output: Contribution to journal › Article › peer-review

Abstract

The supramolecular self-assembly of copper(II) octaethylporphyrin (CuOEP) and octaethylporphyrin (H₂OEP) on graphitic surfaces immersed in organic solvents (dichlorobenzene, dodecane) is studied using scanning tunneling microscopy (STM) and Raman spectroscopy. STM reveals that the self-assembled structure of CuOEP in 1,2-dichlorobenzene is significantly altered by dissolved oxygen within the solvent. Raman spectroscopy reveals that the presence of the oxygen alters the molecule-substrate interaction, which is attributed to the adsorption of oxygen on the Cu center of the CuOEP, which is facilitated by electron transfer from the graphitic surface. Such oxygen-induced changes are not observed for H₂OEP, indicating that the metal center of CuOEP plays a critical role. When the solvent is dodecane, we find that solvation effects dominate. CuOEP adsorbed on graphitic surfaces provides a model system relevant to the study of the transport and activation of oxygen by enzymes and other complexes.

Original language	English
Pages (from-to)	5526-5531
Number of pages	6
Journal	Langmuir
Volume	32
Issue number	22
DOIs	https://doi.org/10.1021/acs.langmuir.6b01580
State	Published - 7 Jun 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Spectroscopy
General Materials Science
Surfaces and Interfaces
Electrochemistry

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title = "Influence of Dissolved O2 in Organic Solvents on CuOEP Supramolecular Self-Assembly on Graphite",

abstract = "The supramolecular self-assembly of copper(II) octaethylporphyrin (CuOEP) and octaethylporphyrin (H2OEP) on graphitic surfaces immersed in organic solvents (dichlorobenzene, dodecane) is studied using scanning tunneling microscopy (STM) and Raman spectroscopy. STM reveals that the self-assembled structure of CuOEP in 1,2-dichlorobenzene is significantly altered by dissolved oxygen within the solvent. Raman spectroscopy reveals that the presence of the oxygen alters the molecule-substrate interaction, which is attributed to the adsorption of oxygen on the Cu center of the CuOEP, which is facilitated by electron transfer from the graphitic surface. Such oxygen-induced changes are not observed for H2OEP, indicating that the metal center of CuOEP plays a critical role. When the solvent is dodecane, we find that solvation effects dominate. CuOEP adsorbed on graphitic surfaces provides a model system relevant to the study of the transport and activation of oxygen by enzymes and other complexes.",

author = "Yibo Hao and Weatherup, {Robert S.} and Baran Eren and Somorjai, {Gabor A.} and Miquel Salmeron",

note = "Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, of the U.S. Department of Energy (DOE) [DE-AC02-05CH11231]; St. John's College, Cambridge; EU Marie Sklodowska-Curie Individual Fellowship from the European Union [656870]; Swiss National Science Foundation (SNF)",

year = "2016",

month = jun,

day = "7",

doi = "https://doi.org/10.1021/acs.langmuir.6b01580",

language = "الإنجليزيّة",

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T1 - Influence of Dissolved O2 in Organic Solvents on CuOEP Supramolecular Self-Assembly on Graphite

AU - Hao, Yibo

AU - Weatherup, Robert S.

AU - Eren, Baran

AU - Somorjai, Gabor A.

AU - Salmeron, Miquel

N1 - Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, of the U.S. Department of Energy (DOE) [DE-AC02-05CH11231]; St. John's College, Cambridge; EU Marie Sklodowska-Curie Individual Fellowship from the European Union [656870]; Swiss National Science Foundation (SNF)

PY - 2016/6/7

Y1 - 2016/6/7

N2 - The supramolecular self-assembly of copper(II) octaethylporphyrin (CuOEP) and octaethylporphyrin (H2OEP) on graphitic surfaces immersed in organic solvents (dichlorobenzene, dodecane) is studied using scanning tunneling microscopy (STM) and Raman spectroscopy. STM reveals that the self-assembled structure of CuOEP in 1,2-dichlorobenzene is significantly altered by dissolved oxygen within the solvent. Raman spectroscopy reveals that the presence of the oxygen alters the molecule-substrate interaction, which is attributed to the adsorption of oxygen on the Cu center of the CuOEP, which is facilitated by electron transfer from the graphitic surface. Such oxygen-induced changes are not observed for H2OEP, indicating that the metal center of CuOEP plays a critical role. When the solvent is dodecane, we find that solvation effects dominate. CuOEP adsorbed on graphitic surfaces provides a model system relevant to the study of the transport and activation of oxygen by enzymes and other complexes.

AB - The supramolecular self-assembly of copper(II) octaethylporphyrin (CuOEP) and octaethylporphyrin (H2OEP) on graphitic surfaces immersed in organic solvents (dichlorobenzene, dodecane) is studied using scanning tunneling microscopy (STM) and Raman spectroscopy. STM reveals that the self-assembled structure of CuOEP in 1,2-dichlorobenzene is significantly altered by dissolved oxygen within the solvent. Raman spectroscopy reveals that the presence of the oxygen alters the molecule-substrate interaction, which is attributed to the adsorption of oxygen on the Cu center of the CuOEP, which is facilitated by electron transfer from the graphitic surface. Such oxygen-induced changes are not observed for H2OEP, indicating that the metal center of CuOEP plays a critical role. When the solvent is dodecane, we find that solvation effects dominate. CuOEP adsorbed on graphitic surfaces provides a model system relevant to the study of the transport and activation of oxygen by enzymes and other complexes.

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DO - https://doi.org/10.1021/acs.langmuir.6b01580

M3 - مقالة

SN - 0743-7463

VL - 32

SP - 5526

EP - 5531

JO - Langmuir

JF - Langmuir

IS - 22

ER -

Influence of Dissolved O₂ in Organic Solvents on CuOEP Supramolecular Self-Assembly on Graphite

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