Properties of Calix4-Lead(Pb) Films Using Langmuir-Blodgett (LB) Technique as an Application of Ion Sensor

Azahari, Noor Azyyati; Supian, Faridah Lisa; Richardson, T.; Malik, Syed Abdul

doi:10.4028/www.scientific.net/amr.895.8

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…The ∆𝑉-𝐴 and 𝜇 ⊥ -𝐴 isotherms for C4-PABA and C6-PABA shown in Figure 7 show the same behaviour as well, that the rearrangement and reorientation of molecules are indicated by the flexures. (Azahari et al, 2014;Supian et al, 2010). The ∆𝑉 𝑚𝑎𝑥 and 𝜇 ⊥ 𝑚𝑎𝑥 determined based on the ∆𝑉-𝐴 and 𝜇 ⊥ -𝐴 isotherms presented in Table 2, Figure 8, and Figure 9 reveal the interaction between C4 and C6 with PABA molecules in the range of detectable concentrations, as discussed in the previous section.…”

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

confidence: 62%

“…This happens due to the rearrangement and reorientation of molecules during the compression. Then, the maximum values of ∆𝑉 and 𝜇 ⊥ is achieved, denoted by ∆𝑉 𝑚𝑎𝑥 and 𝜇 ⊥ 𝑚𝑎𝑥 determined by interpolating the 𝜇 ⊥ 𝑚𝑎𝑥 towards the ∆𝑉-𝐴 isotherm as shown in Figure 6, indicate the most vertical orientation of molecules (Azahari et al, 2014). A reorientation of the 𝜇 is indicated by the decrease of ∆𝑉 and 𝜇 ⊥ upon further compression, followed by the collapsing of the monolayer (Bland et al, 2019;Chachaj-Brekiesz et al, 2021;.…”

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

confidence: 98%

“…The formation of Langmuir films could be applied to measure the host-guest interaction (Jurak et al, 2021;Yang et al, 2017). The application of calixarenes by forming a Langmuir monolayer in the sensor field due to its insolubility in water and solubility in a volatile solvent is worth studying (Razali et al, 2021;Supian et al, 2021;Azahari et al, 2014). C4 and C6 were prepared in the form of solution and spread on the subphase in the Langmuir-Blodgett trough.…”

Section: Introductionmentioning

confidence: 99%

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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 ...supporting

confidence: 62%

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

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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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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“…The ionophore surface pressure-area isotherms were acquired at the air/water interface via the surface pressure (Π) recording (expressed in mN/m) against the molecular area variations (Å 2 ). To ensure both the stability and the reproducibility of all Langmuir isotherms, each experiment was repeated at least 3 times; the result comparison showed a good stability, as well as noble reproducibility (Azahari et al 2014)…”

Section: Resultsmentioning

confidence: 99%

Application of the Langmuir Technique to Study the Response of C-dec-9-en-1-ylcalix[4]resorcinarene and C-undecylcalix[4]resorcinarene Ultra-thin Films' Interactions with Cd2+, Hg2+, Pb2+, and Cu2+ Cations Present in the Subphase

Eddaif

Shaban

Telegdi

2019

Water Air Soil Pollut

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The calix [4]resorcinarene macrocycles are excellent oligomers for the design of amphiphilic derivatives; they can form self-assemblies and stable sensing networks. Owing to their favorable properties, they are the focus of many exploitations and studies ranging from biological controls to heavy metal ion sensing. In this perspective, two calix[4]resorcinarene derivatives, namely: C-dec-9-en-1-ylcalix[4]resorcinarene (ionophore I) and C-undecylcalix[4]resorcinarene (ionophore II) were used to form stable ultra-thin Langmuir monolayer films at the air/water interface; their interactions with different harmful metal cations (Cd 2+ , Pb 2+ , Hg 2+ , and Cu 2+ ) were studied and highlighted via the pressurearea (Π-A) isotherms. The obtained results in the current investigation showed a dependence of both macrocycle interactions on the metal cation concentration in the subphase, confirming their complexation. In addition, the ionophore (I) exhibited high selectivity towards Pb 2+ and Cu 2+ cations, whereas the ionophore (II) showed tendency to bind with Cu 2+ cations over others, approving the potential applicability of these macrocycles as ion selective chemical sensors.

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“…Calixarenes are shaped like a cup with a defined hydrophobic upper rim and a hydrophilic lower rim, together with a hydrophobic cavity. The unique structure and properties of calixarenes make them capable of holding different substances, including ions and neutral molecules [4], [5]. This contributes to the outstanding sensing ability [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Study on the Reactivity and Stability of Calix[n]arene-paba Complexes: Drug Sensor Application

Yeong Yi Wong,

Faridah Lisa Supian,

Afiq Radzwan

et al. 2024

IJNeaM

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As drug carriers, calixarenes are often investigated and employed in numerous sectors as host molecules. The use of calixarenes in drug delivery systems is a relatively new notion, despite the fact that countless studies have been conducted on calixarenes and their various applications. It is worthwhile to research the computational investigation of the host-guest interaction between calixarenes and para-aminobenzoic acid (PABA) in terms of their binding energy and band gap. The first principles study of PABA sensing by calix [4] arene (C4) and calix [6] arene (C6) based on density functional theory (DFT) was carried out in this study using Quantum ESPRESSO software. By using the computational method, the binding energy, as well as the band gap of C4, C6, PABA, and the novel complexes, C4-PABA, and C6-PABA, were calculated. Different interaction distances were used in the formation of complexes. Our results demonstrate the reduction of the band gap for both complexes. Furthermore, the calculated binding energy shows the promising stability of the complexes. This demonstrates the sensing ability of calixarenes towards PABA and the potential anti-cancer properties of calixarene-PABA in sunscreens.

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Properties of Calix4-Lead(Pb) Films Using Langmuir-Blodgett (LB) Technique as an Application of Ion Sensor

Cited by 7 publications

References 8 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

Application of the Langmuir Technique to Study the Response of C-dec-9-en-1-ylcalix[4]resorcinarene and C-undecylcalix[4]resorcinarene Ultra-thin Films' Interactions with Cd2+, Hg2+, Pb2+, and Cu2+ Cations Present in the Subphase

Density Functional Theory Study on the Reactivity and Stability of Calix[n]arene-paba Complexes: Drug Sensor Application

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