Molecular Structure and Monolayer Properties

Hann, R. A.

doi:10.1007/978-1-4899-3716-2_2

Cited by 58 publications

(40 citation statements)

References 178 publications

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“…These porphyrins yield isotherms with an extrapolated area of only 13-17 Å 2 per molecule 1 . This contrasts with an expected value of 225 Å 2 per molecule, if the molecules lie flat on the water surface, and with an expected value of 90 Å 2 per molecule for a vertical packing array of molecules 2 .…”

Section: Introductionmentioning

confidence: 99%

Chemsensor of NO2 gas based on porphyrin of 5, 10, 15, 20-tetraphenylporphyrin LB films and LS films

Sales

Mansur

2008

Mat. Res.

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The sensitivity of 5, 10, 15, 20-tetraphenylporphyrin (H 2 TPP) to the presence of NO 2 gas in diluted solutions and in Langmuir-Blodgett (LB) and Langmuir-Schaefer (LS) films was investigated by UV-visible spectroscopy. The shift of Soret and Q bands were analyzed and the energies involved were calculated. The exposure of LB porphyrin films deposited onto glass slides to NO 2 has performed as an active chemsensor with 7000 ppm gas concentration. Furthermore, the UV-vis dichroism absorption results associated with the Soret bands have given evidence of the tilt angle of the macrocycle related to the substrate. H 2 TPP in LB film was tilted by an angle of 51 ± 5° and in the LS film was tilted by an angle of 36° ± 5° indicating the formation of a preferential organization of the molecular films depending on the deposition method.

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Section: Introductionmentioning

confidence: 99%

Chemsensor of NO2 gas based on porphyrin of 5, 10, 15, 20-tetraphenylporphyrin LB films and LS films

Sales

Mansur

2008

Mat. Res.

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“…Polyethylene, nylon 6, and cellulose acetate substrates were prepared on QCM gold electrodes by spin-coating 14,15 , and arachidic acid was deposited onto the substrates as a model oily soil using the LangmuirBlodgett LB technique 16 . The QCM was subsequently cleaned using ultrasound in aqueous detergent solutions.…”

Section: Quartz Crystal Microbalance Techniquesmentioning

confidence: 99%

Experimental Analysis of Detergency Phenomena and Investigation of a Next-generation Detergency System

Gotoh

2017

J. Oleo Sci.

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“…Monolayers can be compressed or expanded with a hydrophilic movable barrier and parameters such as surface pressure (Φ = γ 0 -γ, where γ 0 and γ are the surface tension in the absence and presence of surfactant), surface potential, and others are measured against the area per surfactant (28,29).…”

Section: Monolayersmentioning

confidence: 99%

Effect of urea on biomimetic aggregates

Florenzano¹,

Politi²

1997

Braz J Med Biol Res

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The effect of urea on biomimetic aggregates (aqueous and reversed micelles, vesicles and monolayers) was investigated to obtain insights into the effect of the denaturant on structured macromolecules. Direct evidence obtained from light scattering (static and dynamic), monolayer maximum isothermal compression and ionic conductivity measurements, together with indirect evidence from fluorescence photodissociation, fluorescence suppression, and thermal reactions, strongly indicates the direct interaction mechanism of urea with the aggregates. Preferential solvation of the surfactant headgroups by urea results in an increase in the monomer dissociation degree (when applied), which leads to an increase in the area per headgroup and also in the loss of counterion affinities.

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Molecular Structure and Monolayer Properties

Cited by 58 publications

References 178 publications

Chemsensor of NO2 gas based on porphyrin of 5, 10, 15, 20-tetraphenylporphyrin LB films and LS films

Chemsensor of NO2 gas based on porphyrin of 5, 10, 15, 20-tetraphenylporphyrin LB films and LS films

Experimental Analysis of Detergency Phenomena and Investigation of a Next-generation Detergency System

Effect of urea on biomimetic aggregates

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