Liquid-phase epitaxy of multicomponent layer-based porous coordination polymer thin films of [M(L)(P)0.5] type: importance of deposition sequence on the oriented growth.
The progressive liquid-phase layer-by-layer (LbL) growth of anisotropic multicomponent layer-based porous coordination polymers (PCPs) of the general formula [M(L)(P)(0.5)] (M: Cu(2+), Zn(2+); L: dicarboxylate linker; P: dinitrogen pillar ligand) was investigated by using either pyridyl- or carboxyl-terminated self-assembled monolayers (SAMs) on gold substrates as templates. It was found that the deposition of smooth, highly crystalline, and oriented multilayer films of these PCPs depends on the conditions at the early growth cycles. In the case of a two-step process with an equimolar mixture of L and P, growth along the [001] direction is strongly preferred. However, employing a three-step scheme with full separation of all components allows deposition along the [100] direction on carboxyl-terminated SAMs. Interestingly, the growth of additional layers on top of previously grown oriented seeding layers proved to be insensitive to the particular growth scheme and full retention of the initial orientation, either along the [001] or [100] direction, was observed. This homo- and heteroepitaxial LbL growth allows full control over the orientation and the layer sequence, including introduction of functionalized linkers and pillars.
Inorganic Chemistry II-Organometallics & Materials, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44870 Bochum, Germany.
Denise
D
Zacher
Kirill
K
Yusenko
Angèlique
A
Bétard
Sebastian
S
Henke
Mariusz
M
Molon
Tatjana
T
Ladnorg
Osama
O
Shekhah
Björn
B
Schüpbach
Teresa
T
de los Arcos
Michael
M
Krasnopolski
Mikhail
M
Meilikhov
Jörg
J
Winter
Andreas
A
Terfort
Christof
C
Wöll
Roland A
RA
Fischer