Driving Coordination Polymer Monolayer Formation by
Competitive Reactions at the Air/Water Interface
Version 2 2018-09-20, 18:50
Version 1 2018-09-20, 18:45
Posted on 2018-09-20 - 18:50
We
have developed a novel approach enabling us to follow and facilitate
the formation of two-dimensional coordination polymer monolayers directly
at the air/water interface without the need of complex instrumentation.
The method is based on the use of a surface active ligand that, when
spread at the air/water interface, progressively undergoes hydrolysis
with consequent gradual decrease in surface pressure. Notably, if
the aqueous subphase contains metal ions capable of coordinating the
ligand, coordination competes with hydrolysis, resulting in a lower
surface pressure decrease. As a consequence, the formation of the
coordination polymer monolayer can be verified simply by surface pressure
measurements. Competition between hydrolysis and coordination was
investigated as a function of the main experimental parameters affecting
the two reactions, enabling the formation of stable coordination polymer
monolayers with controlled density. Finally, the formation of continuous
rigid 2D layers was confirmed by compression isotherms and ex situ
morphological characterization. This work will simplify the verification
of coordination polymer monolayer formation; thus, it will boost the
synthesis of novel and innovative 2D materials.
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Tuccitto, Nunzio; Amato, Tiziana; Gangemi, Chiara Maria Antonietta; Sfrazzetto, Giuseppe Trusso; Puglisi, Roberta; Pappalardo, Andrea; et al. (2018). Driving Coordination Polymer Monolayer Formation by
Competitive Reactions at the Air/Water Interface. ACS Publications. Collection. https://doi.org/10.1021/acs.langmuir.8b02607
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AUTHORS (10)
NT
Nunzio Tuccitto
TA
Tiziana Amato
CG
Chiara Maria Antonietta Gangemi
GS
Giuseppe Trusso Sfrazzetto
RP
Roberta Puglisi
AP
Andrea Pappalardo
FB
Francesco P. Ballistreri
GM
Grazia M. L. Messina
GL
Giovanni Li-Destri
GM
Giovanni Marletta
KEYWORDS
coordination polymer monolayer formationnovel approachcoordination polymer monolayers2 D materialssurface pressure decrease2 D layerssurface pressure measurementsCompetitive ReactionsCoordination Polymer Monolayer Formationmetal ionscoordination polymer monolayerhydrolysissurface pressurecompression isotherms