Molecular organization and syn⇆anti conformational equilibria in ethane-bridged bis(zinc porphyrin) floating films at the air–water interface

Borovkov, Victor; Casilli, Serena; Conoci, Sabrina; Inoue, Yoshihisa; Sortino, Salvatore; Valli, Ludovico

doi:10.1016/j.susc.2004.08.022

Cited by 10 publications

(14 citation statements)

References 20 publications

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“…From then on, a phase transition is seen and a long process with a less marked slope takes place. Borovkov et al 9 and Valli et al 6 also observed the same phase transition working with Langmuir films of bis(zinc porphyrin) and zinc porphyrin, respectively. Borovkov et al 9 attributed the existence of these two phases to the increase in size of three-dimensional aggregates.…”

Section: Film Characterizationmentioning

confidence: 60%

“…Borovkov et al 9 and Valli et al 6 also observed the same phase transition working with Langmuir films of bis(zinc porphyrin) and zinc porphyrin, respectively. Borovkov et al 9 attributed the existence of these two phases to the increase in size of three-dimensional aggregates. Nevertheless, there are not significant changes in the surface pressure that indicate the monolayer collapse.…”

Section: Film Characterizationmentioning

confidence: 60%

“…The presence of large domains is still predominant into the gas-phase reached at low surface pressures (π = 2 mN/m) by compressing the monolayer. Borovkov et al 9 also observed the co-existence of gas and condensed domains in Langmuir films of an bis(zinc porphyrin) and also attributed this event to the presence of aggregates on the water surface. The increase of surface pressure toward the liquid-phase (π = 10 mN/m) and condensed-phase (π = 30 mN/m) increases the Langmuir monolayer uniformity and large domains are no longer observed.…”

Section: Znppix-dme Langmuir Filmsmentioning

confidence: 93%

“…Porphyrins are versatile molecules which physicochemical properties are very sensitive to the modification of their electronic distribution on the pyrrole ring 3 . They have been frequently employed as vapor sensors once their optical spectra can be modified as a result of the interaction between the porphyrin ring and the vapor molecule [4][5][6][7][8][9] . Specifically, metalloporphyrins have been used as amine vapor sensors due to the specific affinity between the metallic atom and the amine moiety 4 .…”

Section: Introductionmentioning

confidence: 99%

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Supramolecular arrangements of an organometallic forming nanostructured films

et al. 2014

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Drganometallic materials have become subject of intensive research on distinct technological applications. The Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) techniques have proven to be suitable to address challenges inherent to organic devices, in which the film properties can be tuned at molecular level. Here, we report on the supramolecular arrangement of zinc(OO)-protoporphyrin(OX) dimethyl ester (ZnPPOX-DME) using the Langmuir, LB and LS techniques, leading to nanostructured films. The π-A isotherms showed that π-π stacking interaction among ZnPPOX-DME molecules takes place at the air/water interface, favoring the formation of Langmuir films closely packed. The controlled growth of the LB and LS films was monitored via UV-Vis absorption spectroscopy, with the thickness per monolayer within 1.3 and 1.7 nm. The homogeneous topography found at microscale is no longer preserved at nanoscale, which is found rougher according to AFM data. The FTOR indicated that the ZnPPOX-DME is isotropically arranged on both LB and LS films.

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Section: Film Characterizationmentioning

confidence: 60%

Section: Film Characterizationmentioning

confidence: 60%

Section: Znppix-dme Langmuir Filmsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Supramolecular arrangements of an organometallic forming nanostructured films

et al. 2014

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“…In our previous studies [8], a chloroform solution of ZnPP was spread on an ultrapure water (MilliQ grade) subphase of a Langmuir trough and the floating film was characterized by means of reflection spectroscopy and then transferred onto a quartz substrate by Langmuir-Schaefer (LS) deposition technique [9]. The Langmuir-Schaefer deposition was carried out on a NIMA trough apparatus (area of 450 cm 2 ) and by spreading ZnPP chloroform solution onto a subphase of ultrapure water (resistivity larger than 18 MX cm) obtained by a Milli-Q system.…”

mentioning

confidence: 88%

Conformational switching in bis(zinc porphyrin) Langmuir–Schaefer film as an effective tool for selectively sensing aromatic amines

Giancane

Borovkov

Inoue

et al. 2012

Journal of Colloid and Interface Science

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A Versatile Bisporphyrinoid Motif for Supramolecular Chirogenesis

Borovkov

Inoue

2009

Eur J Org Chem

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During the last decade there has been continuously growing interest in the phenomenon of supramolecular chirogenesis, which is a smart combination of chirality and supramolecular chemistry effectively used for investigations of various aspects of living organisms, modern physical and naturalsciences, and also for technological applications. Thanks to their spectral, chemical, and physicochemical properties, porphyrinoids have been found to be one of the best suited classes of compounds for study of this subject. Out of a vast number of the porphyrinoid‐based supramolecular systems employed for this purpose, a bisporphyrinoid motif has been shown to be the simplest, yet widely applicable, structural element that satisfies the requirements for the desired chirogenic properties and ease of synthetic methodology. The aim of this microreview is to highlight the advantages and versatility of this type of chromophoric arrangement for supramolecular chirogenesis.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

show abstract

Molecular organization and syn⇆anti conformational equilibria in ethane-bridged bis(zinc porphyrin) floating films at the air–water interface

Cited by 10 publications

References 20 publications

Supramolecular arrangements of an organometallic forming nanostructured films

Supramolecular arrangements of an organometallic forming nanostructured films

Conformational switching in bis(zinc porphyrin) Langmuir–Schaefer film as an effective tool for selectively sensing aromatic amines

A Versatile Bisporphyrinoid Motif for Supramolecular Chirogenesis

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