Langmuir-Blodgett Films of Asymmetrically Phenyl-Substituted Lutetium Bisphthalocyanines. Spectroscopy and Gas-Sensing Properties

Gorbunova, Yulia G.; Rodrı́guez-Méndez, M.L.; Souto, J.; Tomilova, Larisa G.; Saja, J.A. de

doi:10.1021/cm00056a007

Cited by 35 publications

(27 citation statements)

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“…In the range from 1.0 V to +1.0 V they show two reversible redox pairs associated to the one electron oxidation and the one electron reduction of the phthalocyanine ring respectively [1]. A variety of LnPc 2 have been investigated as the sensing material for voltammetric electrodes [18,19,72]. The lutetium derivative, LuPc has been considered as the model to illustrate the electrochemical and sensing behavior of lanthanide bisphthalocyanines and has been the subject of many studies.…”

Section: Case Study: Electrochemical Sensors Based On Bisphthalocyanines For the Detection Of Phenols With Improved Performancementioning

confidence: 99%

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Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines

Rodrı́guez-Méndez

Medina-Plaza

García-Hernández

et al. 2016

J. Porphyrins Phthalocyanines

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Voltammetric sensors based on phthalocyanines have been used to detect a variety of compounds. In this paper, the state of the art of sensors prepared using classical techniques will be revised. Then, new strategies to improve the performance of the sensors will be described using as example sensors chemically modified with lutetium bisphthalocyanine (LuPc[Formula: see text] dedicated to the detection of phenols of interest in the food industry. Classical LuPc2 carbon paste electrodes can detect phenols such as catechol, caffeic acid or pyrogallol with limits of detection in the range of 10[Formula: see text]–10[Formula: see text] M. The performance can be improved by using nanostructured Langmuir–Blodgett (LB) or Layer by Layer (LbL) films. The enhanced surface to volume ratio produce an increase in the sensitivity of the sensors. Limits of detection of 10[Formula: see text]–10[Formula: see text] M are attained, which are one order of magnitude lower than those obtained using conventional carbon paste electrodes. Moreover, these techniques can be used to co-immobilize two electrocatalytic materials in the same device. The limits of detection obtained in LB sensors combining LuPc2/AuNPs or LuPc2/CNT are further improved. Finally, the LB technique has been used to prepare biosensors where a phenol oxydase (such as tyrosinase or lacasse) is immobilized in a biomimetic environment that preserves the enzymatic activity. Moreover, LuPc2 can be co-immobilized with the enzyme in a lipidic film formed by arachidic acid (AA). LuPc2 can act as an electron mediator facilitating the electron transfer. These biomimetic sensors formed by LuPc2/AA/enzyme show Limits of detection of 10[Formula: see text] M and an enhanced selectivity.

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Section: Case Study: Electrochemical Sensors Based On Bisphthalocyanines For the Detection Of Phenols With Improved Performancementioning

confidence: 99%

“…with improved electrocatalytic properties. Further more, traditional sensing materials such as phthalocy anines can be deposited as nanostructured films using selfassembling [15], or by the Layer by Layer (LbL) [16] or the Langmuir-Blodgett (LB) techniques [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines

Rodrı́guez-Méndez

Medina-Plaza

García-Hernández

et al. 2016

J. Porphyrins Phthalocyanines

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“…At the same time SERS and SERRS have been applied to study a variety of LB film properties. For instance, they were used to determine the molecular organization and/or molecular aggregation [70][71][72][73][74][75][76] , to distinguish dye monomer and aggregates 77 , in molecular recognition 78,79 and interactions between LB film and distinct analytes either in gas or solution 42,71,76,80,81 . The reversible adsorption of NO on phthalocyanine LB monolayers deposited on 4 nm evaporated Au island films was monitored with SERRS spectroscopy 82 .…”

Section: Blodgett Filmsmentioning

confidence: 99%

“…Other applications of SERS involve basic spectroscopic studies to infer chemical information through vibrational assignments 81,[85][86][87][88][89][90] . Berno et al 91 studied the effect of the laser line excitation energies (1064; 647.1; 514.5 and 488 nm) on enhanced Raman spectra (in and out of resonance with the target molecule), some of these spectra are shown in Figure 13.…”

Section: Blodgett Filmsmentioning

confidence: 99%

Surface-Enhanced Raman Scattering: Metal Nanostructures Coated With Langmuir-Blodgett Films

Aléssio

Constantino

Aroca

et al. 2010

J. Chil. Chem. Soc.

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on leave from the department of chem. and biochem, university of windsor, windsor, ontario, canada. (Received: August 30, 2010 -Accepted: November 16, 2010) aBStract This review deals with surface-enhancved Raman scattering (SERS) employing Langmuir-Blodgett (LB) films, which serve as model systems for developing theoretical and experimental studies to elucidate the SERS effect. In addition, LB films have be used as integral parts of molecular architectures for SERS-active substrates. On the other hand, SERS and surface-enhaced resonant Raman scattering (SERRS) have allowed various properties of LB films to be investigated, especially those associated with molecular-level interactions. In the paper, emphasis is placed on single molecule detection (SMD), where the target molecule is diluted on an LB matrix of spectral silent material (low Raman cross section). The perspectives and challenges for combining SERS and LB films are also discussed.

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“…It is known that a particular feature of coordination chem istry of rare-earth elements (REEs) is the possibility of formation of sandwich complexes alongside monophthalocyaninates. Due to the presence of several macrocyclic rings capable of multiple reversible redox transitions, such compounds are promising as compo nents of multichromic displays, sensors (including bio sensors), and conducting materials [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Supramolecular associates of double-decker lanthanide phthalocyanines with macromolecular structures and nanoparticles as the basis of biosensor devices

Лобанов

Gromova

Gorbunova

et al. 2014

Prot Met Phys Chem Surf

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The electronic spectroscopy technique is used to study the properties of solutions of double decker diphthalocyanine complexes of lanthanides LnPc 2 (Ln = Ho, Er, Yb, Lu) in chloroform, dimethyl formamide, water-micellar systems, solutions of proteins, and polymers, as well as on the surface of silica nanoparticles. In all the studied systems, a correlation is established between the positions of maxima of absorption bands of LnPc 2 and the ionic radius of the complexing metal. Redox processes determined by the nature of the solubilizer are detected in supramolecular associates of LnPc 2 with macrocompounds and nano particles. Finally, prototypes of sensor systems are suggested for determination of albumin and silica nano particles in solutions. Films of polyvinyl pyrrolidone and polyvinyl alcohol containing LuPc 2 and YbPc 2 are obtained, for which sensor response to albumin and nanosilica is also established. On the whole, the results show good prospects for development of sensor devices based on the studied systems.

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Langmuir-Blodgett Films of Asymmetrically Phenyl-Substituted Lutetium Bisphthalocyanines. Spectroscopy and Gas-Sensing Properties

Cited by 35 publications

References 0 publications

Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines

Improvement of electrocatalytic effect in voltammetric sensors based on phthalocyanines

Surface-Enhanced Raman Scattering: Metal Nanostructures Coated With Langmuir-Blodgett Films

Supramolecular associates of double-decker lanthanide phthalocyanines with macromolecular structures and nanoparticles as the basis of biosensor devices

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