Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces

Gaby Avila-Bront, Christopher Fleming, Mark C. Whitfield, Lieve G. Teugals, S. J. Sibener

Research output: Contribution to conferenceAbstract

Abstract

The self-assembly of nickel tetraphenyl porphyrin (NiTPP) on achiral Au(111), which includes randomly located kinked steps, and chiral Au(1036 1070 1035) and (1036 1035 1070) surfaces has been studied using UHV scanning tunneling microscopy. The clean surfaces of the achiral and chiral gold crystals were characterized with STM. Subsequently, NiTPP molecules were deposited on each surface. On achiral Au(111), the porphyrins assemble into racemic mixtures of enantiomerically resolved domains. It is concluded that, on large flat terraces, intermolecular interactions are the dominant factor in the chiral assembly. Moreover, it is found that the chirality of the molecular array can be guided using the handedness of locally kinked step edges. Preliminary work has begun on the chiral crystal surfaces. Initial findings suggest that the chirality of the kinked step edges induces formation of a single-handed domain of molecules across a terrace.

Conference

Conference245th National Meeting of the American-Chemical-Society (ACS)
CountryUnited Kingdom
CityNew Orleans, LA
Period7/04/1311/04/13

Fingerprint

Porphyrins
Chirality
Nickel
Crystals
Molecules
Scanning tunneling microscopy
Gold
Self assembly

Keywords

  • enantiomeric porphyrin domains
  • chiral stepped surfaces
  • nickel tetraphenyl porphyrin
  • achiral and chiral gold

Cite this

Avila-Bront, G., Fleming, C., Whitfield, M. C., Teugals, L. G., & Sibener, S. J. (2013). Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces. Abstract from 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, LA, United Kingdom.
Avila-Bront, Gaby ; Fleming, Christopher ; Whitfield, Mark C. ; Teugals, Lieve G. ; Sibener, S. J. / Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces. Abstract from 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, LA, United Kingdom.
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abstract = "The self-assembly of nickel tetraphenyl porphyrin (NiTPP) on achiral Au(111), which includes randomly located kinked steps, and chiral Au(1036 1070 1035) and (1036 1035 1070) surfaces has been studied using UHV scanning tunneling microscopy. The clean surfaces of the achiral and chiral gold crystals were characterized with STM. Subsequently, NiTPP molecules were deposited on each surface. On achiral Au(111), the porphyrins assemble into racemic mixtures of enantiomerically resolved domains. It is concluded that, on large flat terraces, intermolecular interactions are the dominant factor in the chiral assembly. Moreover, it is found that the chirality of the molecular array can be guided using the handedness of locally kinked step edges. Preliminary work has begun on the chiral crystal surfaces. Initial findings suggest that the chirality of the kinked step edges induces formation of a single-handed domain of molecules across a terrace.",
keywords = "enantiomeric porphyrin domains, chiral stepped surfaces, nickel tetraphenyl porphyrin, achiral and chiral gold",
author = "Gaby Avila-Bront and Christopher Fleming and Whitfield, {Mark C.} and Teugals, {Lieve G.} and Sibener, {S. J.}",
year = "2013",
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note = "245th National Meeting of the American-Chemical-Society (ACS) ; Conference date: 07-04-2013 Through 11-04-2013",

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Avila-Bront, G, Fleming, C, Whitfield, MC, Teugals, LG & Sibener, SJ 2013, 'Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces' 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, LA, United Kingdom, 7/04/13 - 11/04/13, .

Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces. / Avila-Bront, Gaby; Fleming, Christopher; Whitfield, Mark C.; Teugals, Lieve G.; Sibener, S. J.

2013. Abstract from 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, LA, United Kingdom.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces

AU - Avila-Bront, Gaby

AU - Fleming, Christopher

AU - Whitfield, Mark C.

AU - Teugals, Lieve G.

AU - Sibener, S. J.

PY - 2013/4/7

Y1 - 2013/4/7

N2 - The self-assembly of nickel tetraphenyl porphyrin (NiTPP) on achiral Au(111), which includes randomly located kinked steps, and chiral Au(1036 1070 1035) and (1036 1035 1070) surfaces has been studied using UHV scanning tunneling microscopy. The clean surfaces of the achiral and chiral gold crystals were characterized with STM. Subsequently, NiTPP molecules were deposited on each surface. On achiral Au(111), the porphyrins assemble into racemic mixtures of enantiomerically resolved domains. It is concluded that, on large flat terraces, intermolecular interactions are the dominant factor in the chiral assembly. Moreover, it is found that the chirality of the molecular array can be guided using the handedness of locally kinked step edges. Preliminary work has begun on the chiral crystal surfaces. Initial findings suggest that the chirality of the kinked step edges induces formation of a single-handed domain of molecules across a terrace.

AB - The self-assembly of nickel tetraphenyl porphyrin (NiTPP) on achiral Au(111), which includes randomly located kinked steps, and chiral Au(1036 1070 1035) and (1036 1035 1070) surfaces has been studied using UHV scanning tunneling microscopy. The clean surfaces of the achiral and chiral gold crystals were characterized with STM. Subsequently, NiTPP molecules were deposited on each surface. On achiral Au(111), the porphyrins assemble into racemic mixtures of enantiomerically resolved domains. It is concluded that, on large flat terraces, intermolecular interactions are the dominant factor in the chiral assembly. Moreover, it is found that the chirality of the molecular array can be guided using the handedness of locally kinked step edges. Preliminary work has begun on the chiral crystal surfaces. Initial findings suggest that the chirality of the kinked step edges induces formation of a single-handed domain of molecules across a terrace.

KW - enantiomeric porphyrin domains

KW - chiral stepped surfaces

KW - nickel tetraphenyl porphyrin

KW - achiral and chiral gold

M3 - Abstract

ER -

Avila-Bront G, Fleming C, Whitfield MC, Teugals LG, Sibener SJ. Guiding the formation of single-handed enantiomeric porphyrin domains using kinked and chiral stepped surfaces. 2013. Abstract from 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, LA, United Kingdom.