TY  - JOUR
A1  - Hänsel, Marc
A1  - Barta, Christoph
A1  - Rietze, Clemens
A1  - Utecht, Manuel Martin
A1  - Rueck-Braun, Karola
A1  - Saalfrank, Peter
A1  - Tegeder, Petra
T1  - Two-Dimensional Nonlinear Optical Switching Materials
BT  - Molecular Engineering toward High Nonlinear Optical Contrasts
JF  - The journal of physical chemistry : C, Nanomaterials and interfaces
N2  - Combining photochromism and nonlinear optical (NLO) properties of molecular switches-functionalized self-assembled monolayers (SAMs) represents a promising concept toward novel photonic and optoelectronic devices. Using second harmonic generation, density functional theory, and correlated wave function methods, we studied the switching abilities as well as the NLO contrasts between different molecular states of various fulgimide-containing SAMs on Si(111). Controlled variations of the linker systems as well as of the fulgimides enabled us to demonstrate very efficient reversible photoinduced ring-opening/closure reactions between the open and closed forms of the fulgimides. Thus, effective cross sections on the order of 10(-18) cm(-2) are observed. Moreover, the reversible switching is accompanied by pronounced NLO contrasts up to 32%. Further molecular engineering of the photochromic switches and the linker systems may even increase the NLO contrast upon switching.
Y1  - 2018
U6  - https://doi.org/10.1021/acs.jpcc.8b08212
SN  - 1932-7447
SN  - 1932-7455
VL  - 122
IS  - 44
SP  - 25555
EP  - 25564
PB  - American Chemical Society
CY  - Washington
ER  -