Optical spectroscopy studies of the complexation of chromogenic azo-calix[4]arene with Eu3+, Ag+ and Cu2+ ions

Rouis, A.; Mlika, R.; Dridi, C.; Davenas, J.; Ouada, H. Ben; Halouani, Hatem; Bonnamour, Isabelle; Jaffrezic, N.

doi:10.1016/j.msec.2005.10.081

Cited by 24 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shift in the absorption band of the LB film may be the result of some kind of molecular aggregation which takes place during film formation, such as dimerization [33,34]. UV-vis spectra have been used to monitor the effect of the solvent on the complexation properties between chromogenic calix [4]arene derivatives and metallic cations with extensive studies being made in solvents such as tetrahydrofuran, chloroform, methanol, acetone, ethanol, acetonitrile, dimethylformamide and dimethyl sulfoxide [35]. These results showed that the UV-vis spectra of the calixarenes are highly solvent dependent because the position, intensity and the shape of the absorbance bands of each compound in solution, have varied with changes in solvent and a red shift is commonly observed.…”

Section: Isotherm Graphmentioning

confidence: 99%

Characterization of Langmuir–Blodgett films of a calix[8]arene and sensing properties towards volatile organic vapors

Çapan

Özbek

Göktaş

et al. 2010

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

a b s t r a c tWithin this article, we report the characterization and organic vapor sensing properties of Langmuir-Blodgett (LB) thin films of calix[8]arenes. Surface pressure-area isotherms show that very stable monolayers are formed at the air-water interface. The LB film could be deposited onto different substrates which allowed the films to be characterized by UV, quartz crystal microbalance (QCM), surface plasmon resonance (SPR) and atomic force microscopy (AFM). The results indicate that good quality, uniform LB films can be prepared with transfer ratios of over 0.95. QCM results showed that the deposited mass of calix[8]arene monolayer onto a quartz crystal decreased from 693 to 204 ng as the number of layers is increased. AFM studies showed a smooth, and void free surface morphology with a rms value of 1.202 nm. The sensing abilities of this LB film towards the development of room temperature organic vapor sensing devices are also studied. Responses of the LB films to various vapors are fast, large, and reversible. It was found that the obtained LB film is significantly more sensitive to chloroform than other vapors. It can be concluded that this molecule could have a potential application in the research area of room temperature vapor sensing devices.

show abstract

Section: Isotherm Graphmentioning

confidence: 99%

Characterization of Langmuir–Blodgett films of a calix[8]arene and sensing properties towards volatile organic vapors

Çapan

Özbek

Göktaş

et al. 2010

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

show abstract

“…Thus, a calixarene scaffold can be made selective for aa particular application by modifying its functionality of the upper and lower rims [36]. Hence, a variety of calixarene derivatives are available and are applied successfully in metal complexation [37], liquid membranes [38,39], and potentiometric and optical systems [40]. The primary benefit of the calixarene motif is the availability of a cavity decorated with functionalized rims, which can create specific interaction with the guest.…”

Section: Introductionmentioning

confidence: 99%

Comparison of silica and novel functionalized silica-based cellulose acetate hybrid membranes in gas permeation study

et al. 2015

View full text Add to dashboard Cite

Cellulose acetate (CA) is a widely applied glassy polymer in the preparation of gas separation membranes. In the present study, hybrid membranes were prepared by incorporating silica (Si) and silica functionalized with ptetranitrocalix[4]arene (Si-CL) into the CA matrix, and their gas permeation abilities were explored with regard to CO 2 , N 2 and CH 4 gases. The diffusion-induced phase separation (DIPS) method was adopted to make pure CA, CA/Si, and CA/Si-CL hybrid membranes. The concentration of Si-CL was varied as 10 wt%, 20 wt% and 30 wt% in the hybrid membranes. The analytical techniques employed for membrane characterization were Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), and X ray-diffraction (XRD) analysis. The proper interaction of Si and Si-CL was confirmed by FTIR analysis. However, the homogenous surface textures of CA/Si, and CA/Si-CL hybrid membranes were evaluated through SEM. Furthermore, AFM analysis was performed to examine the surface roughness of these hybrid membranes. The changes in the crystallinity of CA were also examined by XRD analysis after adding Si and Si-CL. Moreover, the tensile strength of the CA/Si hybrid membrane was found to be better than that of CA/Si-CL hybrid membranes. CO 2 , CH 4 and N 2 gases were used for gas permeation experiments at 400 kPa. Among CO 2 and CH 4 gases, the permeability of N 2 was high in CA/Si-CL hybrid membranes, and N 2 /CO 2 selectivity of these membranes was 22.6.

show abstract

“…The attractive potentialities of such nanocomposite membranes in complexing cations will be exploited to develop chemical sensors exhibiting simultaneously an electrical and optical response. The study of the optical detection is reported in previous papers [39,40] and will be developed for the realization of optodes. …”

Section: Resultsmentioning

confidence: 99%

Impedance spectroscopic investigations of ITO modified by new Azo-calix[4]arene immobilised into electroconducting polymer (MEHPPV)

Rouis

Mlika

Davenas

et al. 2007

Journal of Electroanalytical Chemistry

Self Cite

View full text Add to dashboard Cite

Optical spectroscopy studies of the complexation of chromogenic azo-calix[4]arene with Eu3+, Ag+ and Cu2+ ions

Cited by 24 publications

References 19 publications

Characterization of Langmuir–Blodgett films of a calix[8]arene and sensing properties towards volatile organic vapors

Characterization of Langmuir–Blodgett films of a calix[8]arene and sensing properties towards volatile organic vapors

Comparison of silica and novel functionalized silica-based cellulose acetate hybrid membranes in gas permeation study

Impedance spectroscopic investigations of ITO modified by new Azo-calix[4]arene immobilised into electroconducting polymer (MEHPPV)

Contact Info

Product

Resources

About