Formation and phase behavior of porphyrin/arachidic acid mixed systems and morphology study of Langmuir-Schaefer thin films

Al-Alwani, Ammar J.; Mironyuk, V N; Pozharov, M. V.; Gavrikov, M. V.; Glukhovskoy, E. G.

doi:10.1080/1539445x.2022.2028829

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…The ∆𝑉-𝐴 and 𝜇 ⊥ -𝐴 isotherms for 2100 𝜇l of C4 and C6, as shown in Figure 6 reveal the orientation of molecules during compression. The progressive increase of ∆𝑉 is caused by 𝜇 ⊥ during the compression due to the stretching out of the hydrophobic region of calixarenes at the air-water interface, resulting in a change in molecular orientation (Al-Alwani et al, 2022). When the monolayer changes its state from 2-D gaseous to 2-D liquid, and 2-D liquid to 2-D solid, the flexures occur in the isotherm.…”

Section: Surface Potential-area (∆𝑉-𝐴) Isotherm and Effective Dipole ...mentioning

confidence: 99%

Host-Guest Sensing Interactions of Calixarene-Entrapped Para-Aminobenzoic Acid Using the Langmuir Technique

Wong,

Supian,

Abd Karim

et al. 2023

JSML

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Calixarenes are frequently studied as the host supramolecule in drug carrier applications. The ability to encapsulate and control drug delivery is due to their unique structures with a hydrophobic upper rim and a hydrophilic lower rim. Para-aminobenzoic acid (PABA) is a drug used as the main ingredient in sunscreen products with photoallergic contact dermatitis effects. This study has been motivated by the necessity of developing a PABA sensor even at a deficient concentration. In this work, the uses of two calixarenes, calix[4]arene (C4) and calix[6]arene (C6), in entrapping the PABA drug have been studied using the Langmuir technique. In the Langmuir-Blodgett trough, calixarenes in solution form were prepared and spread on the subphase to form the Langmuir monolayer. The formation of Langmuir films by C4 and C6 has been investigated based on the surface pressure-area ( - ) isotherm and surface potential-area ( - ) isotherm recorded using Langmuir apparatus KSV 2000 System 2. The differences and changes of the isotherms with the presence of para-aminobenzoic acid (PABA) in the subphase during the formation of Langmuir films have been observed and studied. The interactions between calixarenes and PABA have been shown by the effective dipole moment ( ) of the calixarene-PABA complexes calculated based on the results using the Helmholtz equation. Host-guest interaction shown by the sensing of PABA by calixarenes happens most probably at the lower rim of calixarenes due to the amphiphilic property of calixarenes. The findings of this study can be applied to the potential application of drug sensors using C4 and C6.

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Section: Surface Potential-area (∆𝑉-𝐴) Isotherm and Effective Dipole ...mentioning

confidence: 99%

Host-Guest Sensing Interactions of Calixarene-Entrapped Para-Aminobenzoic Acid Using the Langmuir Technique

Wong,

Supian,

Abd Karim

et al. 2023

JSML

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“…Further, these compounds can be engineered and regulated as molecular Legos in supramolecular networks [10,11] conferring indispensable and superior features for detection systems development based on electrochemical, optical and gravimetric transduction modes [12,13]. In this context, porphyrins integration within thin layers has been reported through several self-assembly approaches, including Langmuir-Blodgett (LB) techniques, the Langmuir-Schaefer (LS) approach, drop casting, spin coating, and layer by layer [14][15][16]. LB and LS, above all, are self-assembly humid deposition techniques, known Chemosensors 2022, 10, 331 2 of 11 to guarantee high control of the deposition parameters and high reproducibility of the induced molecular organization from the air-aqueous subphase interface towards the solid support [17,18].…”

Section: Introductionmentioning

confidence: 99%

Proline Enantiomers Discrimination by (L)-Prolinated Porphyrin Derivative Langmuir–Schaefer Films: Proof of Concept for Chiral Sensing Applications

et al. 2022

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A porphyrin derivative functionalized with the L-enantiomer of proline amino acid was characterized at the air–pure water interface of the Langmuir trough. The porphyrin derivative was dissolved in dichloromethane solution, spread at the air–subphase interface and investigated by acquiring the surface pressure vs. area per molecule Langmuir curves. It is worth observing that the behavior of the molecules of the porphyrin derivative floating film was substantially influenced by the presence of L-proline amino acid dissolved in the subphase (10−5 M); on the contrary, the physical chemical features of the floating molecules were only slightly influenced by the D-proline dissolved in the subphase. Such an interesting chirality-driven selection was preserved when the floating film was transferred onto solid supports by means of the Langmuir–Schaefer method, but it did not emerge when a spin-coating technique was used for the layering of the tetrapyrrolic derivatives. The obtained results represent proof of concept for the realization of active molecular layers for chiral discrimination: porphyrin derivatives, due to their intriguing spectroscopic and supramolecular properties, can be functionalized with the chiral molecule that should be detected. Moreover, the results emphasize the crucial role of the deposition technique on the features of the sensing layers.

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Interfacial self-assembly of Cd2+-tetraphenylethylene coordination polymers and their photophysical properties in Langmuir-Blodgett films

Wang

Qian

2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Formation and phase behavior of porphyrin/arachidic acid mixed systems and morphology study of Langmuir-Schaefer thin films

Cited by 5 publications

References 31 publications

Host-Guest Sensing Interactions of Calixarene-Entrapped Para-Aminobenzoic Acid Using the Langmuir Technique

Host-Guest Sensing Interactions of Calixarene-Entrapped Para-Aminobenzoic Acid Using the Langmuir Technique

Proline Enantiomers Discrimination by (L)-Prolinated Porphyrin Derivative Langmuir–Schaefer Films: Proof of Concept for Chiral Sensing Applications

Interfacial self-assembly of Cd2+-tetraphenylethylene coordination polymers and their photophysical properties in Langmuir-Blodgett films

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