scholarly journals In Situ Electrochemical Polymerization at Air–Water Interface: Surface-Pressure-Induced, Graphene-Oxide-Assisted Preferential Orientation of Polyaniline

2012 ◽  
Vol 116 (26) ◽  
pp. 13997-14004 ◽  
Author(s):  
Ganganahalli K. Ramesha ◽  
A. Vijaya Kumara ◽  
Srinivasan Sampath
Keyword(s):  
Graphene Oxide ◽  
Surface Pressure ◽  
Electrochemical Polymerization ◽  
Preferential Orientation ◽  
Water Interface ◽  
Interface Surface ◽  
Air Water Interface

scholarly journals Unveiling the interaction of DNA–octadecylamine at the air–water interface by ultraviolet-visible reflection spectroscopy

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 5872-5879 ◽  
Author(s):  
A. Mora-Boza ◽  
T. Lopes-Costa ◽  
F. Gámez ◽  
J. M. Pedrosa
Keyword(s):  
Surface Pressure ◽  
Water Interface ◽  
Reflection Spectroscopy ◽  
Air Water Interface ◽  
Pressure Area

In this work, ultraviolet-visible reflection spectroscopy is proposed as a technique that, in combination with classical surface pressure–area isotherms, allows to study in situ the adsorption of DNA to octadecylamine monolayers.

scholarly journals Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4155
Author(s):  
Alexander V. Shokurov ◽  
Daria S. Kutsybala ◽  
Andrey P. Kroitor ◽  
Alexander A. Dmitrienko ◽  
Alexander G. Martynov ◽  
...  
Keyword(s):  
Spin State ◽  
Spin Crossover ◽  
High Spin State ◽  
Water Interface ◽  
Metal Centers ◽  
Axial Coordination ◽  
Vis Spectroscopy ◽  
Air Water Interface ◽  
Nickel Cation

Coordination-induced spin crossover (CISCO) in nickel(II) porphyrinates is an intriguing phenomenon that is interesting from both fundamental and practical standpoints. However, in most cases, realization of this effect requires extensive synthetic protocols or extreme concentrations of extra-ligands. Herein we show that CISCO effect can be prompted for the commonly available nickel(II) tetraphenylporphyrinate, NiTPP, upon deposition of this complex at the air/water interface together with a ruthenium(II) phthalocyaninate, CRPcRu(pyz)2, bearing two axial pyrazine ligands. The latter was used as a molecular guiderail to align Ni···Ru···Ni metal centers for pyrazine coordination upon lateral compression of the system, which helps bring the two macrocycles closer together and forces the formation of Ni–pyz bonds. The fact of Ni(II) porphyrinate switching from low- to high-spin state upon acquiring additional ligands can be conveniently observed in situ via reflection-absorption UV-vis spectroscopy. The reversible nature of this interaction allows for dissociation of Ni–pyz bonds, and thus, change of nickel cation spin state, upon expansion of the monolayer.

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