Photoreaction of matrix-isolated Dihydroazulene-functionalized molecules on Au{111}

Bala Krishna Pathem; Yue Bing Zheng; Seth Morton; Michael Åxman Petersen; Yuxi Zhao; Choong-Heui Chung; Yang Yang; Lasse Jensen; Mogens Brøndsted Nielsen; Paul S. Weiss

doi:10.1021/nl304102n

Photoreaction of matrix-isolated Dihydroazulene-functionalized molecules on Au{111}

Bala Krishna Pathem, Yue Bing Zheng, Seth Morton, Michael Åxman Petersen, Yuxi Zhao, Choong-Heui Chung, Yang Yang, Lasse Jensen, Mogens Brøndsted Nielsen, Paul S. Weiss

Department of Chemistry

18 Citations (Scopus)

Abstract

Dihydroazulenes are photochromic molecules that reversibly switch between two distinct geometric and conductivity states. Molecular design, surface attachment, and precise control over the assembly of such molecular machines are critical in order to understand molecular function and motion at the nanoscale. Here, we use surface-enhanced Raman spectroscopy on special atomically flat, plasmonically enhanced substrates to measure the photoreaction kinetics of isolated dihydroazulene-functionalized molecules assembled on Au{111}, which undergo a ring-opening reaction upon illumination with UV light and switch back to the initial isomer via thermal relaxation. Photokinetic analyses reveal the high efficiency of the dihydroazulene photoreaction on solid substrates compared to other photoswitches. An order of magnitude decrease in the photoreaction cross section of surface-bound dihydroazulenes was observed when compared with the cross sections of these molecules in solution.

Original language	English
Journal	Nano Letters
Volume	13
Issue number	2
Pages (from-to)	337-343
Number of pages	7
ISSN	1530-6984
DOIs	https://doi.org/10.1021/nl304102n
Publication status	Published - 13 Feb 2013

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title = "Photoreaction of matrix-isolated Dihydroazulene-functionalized molecules on Au{111}",

abstract = "Dihydroazulenes are photochromic molecules that reversibly switch between two distinct geometric and conductivity states. Molecular design, surface attachment, and precise control over the assembly of such molecular machines are critical in order to understand molecular function and motion at the nanoscale. Here, we use surface-enhanced Raman spectroscopy on special atomically flat, plasmonically enhanced substrates to measure the photoreaction kinetics of isolated dihydroazulene-functionalized molecules assembled on Au{111}, which undergo a ring-opening reaction upon illumination with UV light and switch back to the initial isomer via thermal relaxation. Photokinetic analyses reveal the high efficiency of the dihydroazulene photoreaction on solid substrates compared to other photoswitches. An order of magnitude decrease in the photoreaction cross section of surface-bound dihydroazulenes was observed when compared with the cross sections of these molecules in solution.",

author = "Pathem, {Bala Krishna} and Zheng, {Yue Bing} and Seth Morton and Petersen, {Michael {\AA}xman} and Yuxi Zhao and Choong-Heui Chung and Yang Yang and Lasse Jensen and Nielsen, {Mogens Br{\o}ndsted} and Weiss, {Paul S.}",

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doi = "10.1021/nl304102n",

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TY - JOUR

T1 - Photoreaction of matrix-isolated Dihydroazulene-functionalized molecules on Au{111}

AU - Pathem, Bala Krishna

AU - Zheng, Yue Bing

AU - Morton, Seth

AU - Petersen, Michael Åxman

AU - Zhao, Yuxi

AU - Chung, Choong-Heui

AU - Yang, Yang

AU - Jensen, Lasse

AU - Nielsen, Mogens Brøndsted

AU - Weiss, Paul S.

PY - 2013/2/13

Y1 - 2013/2/13

N2 - Dihydroazulenes are photochromic molecules that reversibly switch between two distinct geometric and conductivity states. Molecular design, surface attachment, and precise control over the assembly of such molecular machines are critical in order to understand molecular function and motion at the nanoscale. Here, we use surface-enhanced Raman spectroscopy on special atomically flat, plasmonically enhanced substrates to measure the photoreaction kinetics of isolated dihydroazulene-functionalized molecules assembled on Au{111}, which undergo a ring-opening reaction upon illumination with UV light and switch back to the initial isomer via thermal relaxation. Photokinetic analyses reveal the high efficiency of the dihydroazulene photoreaction on solid substrates compared to other photoswitches. An order of magnitude decrease in the photoreaction cross section of surface-bound dihydroazulenes was observed when compared with the cross sections of these molecules in solution.

AB - Dihydroazulenes are photochromic molecules that reversibly switch between two distinct geometric and conductivity states. Molecular design, surface attachment, and precise control over the assembly of such molecular machines are critical in order to understand molecular function and motion at the nanoscale. Here, we use surface-enhanced Raman spectroscopy on special atomically flat, plasmonically enhanced substrates to measure the photoreaction kinetics of isolated dihydroazulene-functionalized molecules assembled on Au{111}, which undergo a ring-opening reaction upon illumination with UV light and switch back to the initial isomer via thermal relaxation. Photokinetic analyses reveal the high efficiency of the dihydroazulene photoreaction on solid substrates compared to other photoswitches. An order of magnitude decrease in the photoreaction cross section of surface-bound dihydroazulenes was observed when compared with the cross sections of these molecules in solution.

U2 - 10.1021/nl304102n

DO - 10.1021/nl304102n

M3 - Journal article

C2 - 23286277

SN - 1530-6984

VL - 13

SP - 337

EP - 343

JO - Nano Letters

JF - Nano Letters

IS - 2

ER -

Photoreaction of matrix-isolated Dihydroazulene-functionalized molecules on Au{111}

Abstract

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