Stereoselectivity and electrostatics in charge-transfer Mn- and Cs-TCNQ4 networks on Ag(100)

Abdurakhmanova, Nasiba, Floris, Andrea, Tseng, Tzu-Chun , Comisso, Alessio, Stepanow, Sebastian, De Vita, Alessandro and Kern, Klaus (2012) Stereoselectivity and electrostatics in charge-transfer Mn- and Cs-TCNQ4 networks on Ag(100). Nature Communications, 3 . p. 940. ISSN 2041-1723

Full content URL:

22794 ncomms1942.pdf
22794 ncomms1942.pdf - Whole Document
Available under License Creative Commons Attribution.

Item Type:Article
Item Status:Live Archive


Controlling supramolecular self-assembly is a fundamental step towards molecular
nanofabrication, which involves a formidable reverse engineering problem. It is known that
a variety of structures are efficiently obtained by assembling appropriate organic molecules
and transition metal atoms on well-defined substrates. Here we show that alkali atoms bring
in new functionalities compared with transition metal atoms because of the interplay of local
chemical bonding and long-range forces. Using atomic-resolution microscopy and theoretical
modelling, we investigate the assembly of alkali (Cs) and transition metals (Mn) co-adsorbed
with 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules, forming chiral superstructures
on Ag(100). Whereas Mn-TCNQ4 domains are achiral, Cs-TCNQ4 forms chiral islands. The
specific behaviour is traced back to the different nature of the Cs- and Mn-TCNQ bonding,
opening a novel route for the chiral design of supramolecular architectures. Moreover, alkali
atoms provide a means to modify the adlayer electrostatic properties, which is important for
the design of metal–organic interfaces.

Subjects:F Physical Sciences > F321 Solid state Physics
Divisions:College of Science > School of Mathematics and Physics
ID Code:22794
Deposited On:06 Jun 2016 21:04

Repository Staff Only: item control page