Efficient photogeneration of nonacene on nanostructured graphene

被引：9

作者：

Ayani, Cosme G. ^{[1
,2
]}

Pisarra, Michele ^{[2
,3
]}

Urgel, Jose I. ^{[2
,4
]}

Navarro, Juan Jesus ^{[1
,2
,8
]}

Diaz, Cristina ^{[3
,5
,9
]}

Hayashi, Hironobu ^{[6
]}

Yamada, Hiroko ^{[6
]}

Calleja, Fabian ^{[2
]}

Miranda, Rodolfo ^{[1
,2
,5
]}

Fasel, Roman ^{[4
,7
]}

Martin, Fernando ^{[1
,3
,5
]}

Vazquez de Parga, Amadeo L. ^{[1
,2
,5
]}

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat Condensada, Canto Blanco 28049, Madrid, Spain

[2] IMDEA Nanociencia, Calle Faraday 9, Canto Blanco 28049, Madrid, Spain

[3] Univ Autonoma Madrid, Dept Quim Modulo 13, Canto Blanco 28049, Madrid, Spain

[4] Swiss Fed Labs Mat Sci & Technol, Empa, CH-8600 Dubendorf, Switzerland

[5] Condensed Matter Phys Ctr IFIMAC, Canto Blanco 28049, Madrid, Spain

[6] Nara Inst Sci & Technol NAIST, Grad Sch Sci & Technol, 8916-5 Takayama Cho, Ikoma 6300192, Japan

[7] Univ Bern, Dept Chem & Biochem, Freiestr 3, CH-3012 Bern, Switzerland

[8] Max Planck Gesell, Fritz Haber Inst, Dept Interface Sci, D-14195 Berlin, Germany

[9] Univ Complutense Madrid, Fac CC Quim, Dept Quim Fis, Madrid 28040, Spain

来源：

NANOSCALE HORIZONS | 2021年 / 6卷 / 09期

基金：

瑞士国家科学基金会;

关键词：

ON-SURFACE SYNTHESIS; TOTAL-ENERGY CALCULATIONS; ACENES; HEPTACENE; STABILITY; DYNAMICS; STATES;

D O I：

10.1039/d1nh00184a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The on-surface photogeneration of nonacene from alpha-bisdiketone precursors deposited on nanostructured epitaxial graphene grown on Ru(0001) has been studied by means of low temperature scanning tunneling microscopy and spectroscopy. The presence of an unoccupied surface state, spatially localized in the regions where the precursors are adsorbed, and energetically accessible in the region of the electromagnetic spectrum where n-pi* transitions take place, allows for a 100% conversion of the precursors into nonacenes. With the help of state-of-the-art theoretical calculations, we show that such a high yield is due to the effective population of the surface state by the incoming light and the ensuing electron transfer to the unoccupied states of the precursors through an inelastic scattering mechanism. Our findings are the experimental confirmation that surface states can play a prominent role in the surface photochemistry of complex molecular systems, in accordance with early theoretical predictions made on small molecules.

引用

页码：744 / 750

页数：7

共 53 条

[1]

AMBRUST N, 2021, PHYS REV LETT, V108

[2] The larger acenes: Versatile organic semiconductors [J].