COLOURINGS CHEMISTRY

Author: HERANCE CAMACHO JOSÉ RAUL.
Year: 2004.
University: AUTÓNOMA DE BARCELONA [www.uab.es].
Place of defense: FACULTAD DE CIENCIAS.
Place of preparation: ESCUELA DE POSTGRADO UNIVERSIDAD AUTÓNOMA DE BARCELONA.

Summary: In this thesis is divided into two parts, one devoted to the nonlinear optics and specifically to the second harmonic generation (GSA) is a compound which radiates with light wavelength and it is capable of returning to the medium light wavelength * / 2. The other side is dedicated to the study of complex Meisenheimer, which are the intermediates that arise from the reaction of Replacement Nucleófila Aromática. The link of both parties are porous aluminosilicates used in the case of nonlinear optical processes such as porous media and in the case of complex Meisenheimer as stabilizers such intermediates. In the section on non-linear optics comprises three types of study GSA: 1, the green-Malaquita counterparts. 2-p-nitroanilina incorporated into zeolites. 3-C60. For the first study was conducted synthesis counterpart malachite green, and then they conducted tests GSA in the form of film and sound microcristalino. The second studied the influence of the zeolite channels, p-nitroanilina incorporated in obtaining GSA. Finally, we performed studied d eGSA of C60 incorporated into aluminosilicates and polymers. The second part took place three types of study: 1-Study of the mechanism of decomposition of a complex Meisenheimer activated by irradiation and / or O2. 2-Stabilization of a complex Meisenheiemer in zeolites and hidrotalcitas. 3-Study of the mechanism of transfer between a hydride complex Meisenheimer and oxidizing agents aceptores hydride.

Author: ROS LIS JOSE VICENTE.
Year: 2004.
University: POLITÉCNICA DE VALENCIA [www.upv.es].
Place of defense: Dep. Quimica.
Place of preparation: Universidad Politécnica de Valencia.

Summary: This thesis has been focused on the development of sensors and chemical reagents cromogénicos and fluorogénicos for the detection and identification of species of interest analytical, biological and environmental selectively. Four families have been studied groups of signal generators, bisterpiridinas of osmium, quinones, escuaridnas and azo dyes which covers the whole range of the visible area. The type of species whose identification has been achieved has been very extensive, and includes sensors and reagents for cations (Cu2 +, Ba2 +, Pb2 +, Hg2 +) anion (CN, HSO4-, ATP, F, carboxilatos), and neutral molecules ( thiol, cysteine, polycyclic aromatic compounds), both in solution and in phase gas (O2, thiol and amine).

Author: BASURTO SÁEZ SARA.
Year: 2006.
University: BURGOS [www.ubu.es].
Place of defense: FACULTAD DE CIENCIAS.
Place of preparation: FACULTAD DE CIENCIAS.

Summary: The chemical sensor type cromogénico allow the detection of different analytes spot quickly and easily. Its main advantage is that it is not necessary to use aircraft, and that the analysis can be done with the naked eye because of the color change experienced in the presence of substrate of interest. This work has focused on the study of the properties of new chemical sensors type cromogénico contained in its structure indene groups or groups ferroceno. Those are systems that have a combined amino group with a group attractor and having a band of charge transfer which is responsible for the color changes of species in solution. The coordination of different cations to the nitrogen atom of this band interrupted, causing color changes in the original dissolution. With respect to Type Sensors indénico, studied the properties of different derivatives amino-sustituidos using different techniques: UV-Visible, magnetic resonance and electrochemical techniques. It has been observed that the incorporation of amines present Coordinating several atoms in the structure indénica improves the selectivity of these sensors. In addition, the various derivatives indénicos behave like chemical dosimeters specific CN in organic media. A second line of work focuses on the design and study of new colorimetric sensors that contain at least one group ferroceno in its structure. The group acts as a spacer and support for the reconnaissance unit itself. Of all derivatives ferrocénicos synthesized, which have better properties such as chemical sensors are derivatives 1.1 '-disustituidos with the same or different groups, possessing various barbiturates and amine groups in its structure. The type of complex is formed in each case was determined by UV-Visible and proton nuclear magnetic resonance, while in some cases the formation of complex type gripper.