Adsorption of phenylphosphonic acid on rutile TiO2(110)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10423191" target="_blank" >RIV/00216208:11320/20:10423191 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1xq9owg8NI" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1xq9owg8NI</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.susc.2020.121612" target="_blank" >10.1016/j.susc.2020.121612</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Adsorption of phenylphosphonic acid on rutile TiO2(110)

Popis výsledku v původním jazyce

Binding of functionalized organic molecules to oxide surfaces is an important step in the rational design of molecular devices. In the present investigation, we used synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy to determine the binding mode, electronic structure and adsorption geometry of phenylphosphonic acid (PPA) on TiO2(110)-(1 x 1). We found that PPA multilayers desorb below 380 K leaving a compact PPA monolayer adsorbed on the surface, which remains stable up to 780 K. In the 380-520 K temperature range, molecules are anchored to the surface via a single P-O-Ti covalent bond (monodentate configuration). Furthermore, the phenyl ring is tilted similar to 45 degrees with respect to the surface plane and it either forms 45 degrees or is randomly oriented with respect to [001] crystallographic direction. Raising the temperature above 520 K partially transforms the monodentate configuration to a mixed one-and twofold deprotonated bidentate binding mode, presumably after surface hydroxyl groups leave the surface as water molecules. This change in molecular binding does not alter the molecular electronic structure nor the adsorption geometry, which remain essentially unchanged.

Název v anglickém jazyce

Adsorption of phenylphosphonic acid on rutile TiO2(110)

Popis výsledku anglicky

Binding of functionalized organic molecules to oxide surfaces is an important step in the rational design of molecular devices. In the present investigation, we used synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy to determine the binding mode, electronic structure and adsorption geometry of phenylphosphonic acid (PPA) on TiO2(110)-(1 x 1). We found that PPA multilayers desorb below 380 K leaving a compact PPA monolayer adsorbed on the surface, which remains stable up to 780 K. In the 380-520 K temperature range, molecules are anchored to the surface via a single P-O-Ti covalent bond (monodentate configuration). Furthermore, the phenyl ring is tilted similar to 45 degrees with respect to the surface plane and it either forms 45 degrees or is randomly oriented with respect to [001] crystallographic direction. Raising the temperature above 520 K partially transforms the monodentate configuration to a mixed one-and twofold deprotonated bidentate binding mode, presumably after surface hydroxyl groups leave the surface as water molecules. This change in molecular binding does not alter the molecular electronic structure nor the adsorption geometry, which remain essentially unchanged.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2015057" target="_blank" >LM2015057: Laboratoř fyziky povrchů – Optická dráha pro výzkum materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface Science

ISSN

0039-6028

e-ISSN

—

Svazek periodika

698

Číslo periodika v rámci svazku

Aug

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

121612

Kód UT WoS článku

000541373200002

EID výsledku v databázi Scopus

2-s2.0-85085543219