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Title: Manipulation of Origin of Life Molecules: Recognizing Single-Molecule Conformations in β-Carotene and Chlorophyll-a/β-Carotene Clusters

Abstract

Carotenoids and chlorophyll are essential parts of plant leaves and are involved in photosynthesis, a vital biological process responsible for the origin of life on Earth. Here, we investigate how beta-carotene and chlorophyll-a form mixed molecular phases On a Au(111) surface using low-temperature scanning tunneling microscopy and molecular manipulation at the single-molecule level supported by density functional theory calculations. By isolating individual molecules from nanoscale molecular clusters with a scanning tunneling microscope tip, we are able to identify five beta-carotene conformations including a structure exhibiting a three-dimensional conformation. Furthermore, molecular resolution images enable direct visualization of beta-carotene/chlorophyll-a clsuters, with intimate structural details highlighting how they pair: beta-carotene preferentially positions next to chlorophyll-a and induces switching of chlorophyll-a from straight to several bent tail conformations in the molecular clusters.

Authors:
;  [1];  [1]; ; ORCiD logo;  [1]
  1. Nanoscale &, Quantum Phenomena Institute and Physics &, Astronomy Department, Ohio University, Athens, Ohio 45701, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1427482
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English

Citation Formats

Ngo, Anh T., Skeini, Timur, Iancu, Violeta, Redfern, Paul C., Curtiss, Larry A., and Hla, Saw Wai. Manipulation of Origin of Life Molecules: Recognizing Single-Molecule Conformations in β-Carotene and Chlorophyll-a/β-Carotene Clusters. United States: N. p., 2018. Web. doi:10.1021/acsnano.7b05841.
Ngo, Anh T., Skeini, Timur, Iancu, Violeta, Redfern, Paul C., Curtiss, Larry A., & Hla, Saw Wai. Manipulation of Origin of Life Molecules: Recognizing Single-Molecule Conformations in β-Carotene and Chlorophyll-a/β-Carotene Clusters. United States. doi:10.1021/acsnano.7b05841.
Ngo, Anh T., Skeini, Timur, Iancu, Violeta, Redfern, Paul C., Curtiss, Larry A., and Hla, Saw Wai. Thu . "Manipulation of Origin of Life Molecules: Recognizing Single-Molecule Conformations in β-Carotene and Chlorophyll-a/β-Carotene Clusters". United States. doi:10.1021/acsnano.7b05841.
@article{osti_1427482,
title = {Manipulation of Origin of Life Molecules: Recognizing Single-Molecule Conformations in β-Carotene and Chlorophyll-a/β-Carotene Clusters},
author = {Ngo, Anh T. and Skeini, Timur and Iancu, Violeta and Redfern, Paul C. and Curtiss, Larry A. and Hla, Saw Wai},
abstractNote = {Carotenoids and chlorophyll are essential parts of plant leaves and are involved in photosynthesis, a vital biological process responsible for the origin of life on Earth. Here, we investigate how beta-carotene and chlorophyll-a form mixed molecular phases On a Au(111) surface using low-temperature scanning tunneling microscopy and molecular manipulation at the single-molecule level supported by density functional theory calculations. By isolating individual molecules from nanoscale molecular clusters with a scanning tunneling microscope tip, we are able to identify five beta-carotene conformations including a structure exhibiting a three-dimensional conformation. Furthermore, molecular resolution images enable direct visualization of beta-carotene/chlorophyll-a clsuters, with intimate structural details highlighting how they pair: beta-carotene preferentially positions next to chlorophyll-a and induces switching of chlorophyll-a from straight to several bent tail conformations in the molecular clusters.},
doi = {10.1021/acsnano.7b05841},
journal = {ACS Nano},
issn = {1936-0851},
number = 1,
volume = 12,
place = {United States},
year = {2018},
month = {1}
}