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Content available 30 lat Zespołu Chemii Porfiryn i Metaloporfiryn
EN
In 1990, a new research group was constituted in the Institute of Chemistry, University of Wrocław. The team led by D.Sc. Lechosław Latos-Grażyński focused on the synthesis of novel macrocycles from the porphyrin family and their coordination abilities. The article describes the origins, development, and 30 years of activity of Porphyrin and Metalloporphyrin Chemistry Group.
2
EN
Optical chemical sensors enlarge the definition of a classical chemical sensor; they present results in two-dimensional (2D) or three-dimensional (3D) aspect. They can determine parameters of micro and macro scale objects without using a lot of electronic equipment. This article is focused on sensors based on porphyrin derivatives and europium complexes, being the most frequently used substances sensitive to oxygen concentration, pressure and temperature changes. Along with the presentation of characteristics of substances employed to sensors’ construction, also the general principle of luminescent sensors operation, composition and operation range of selected mono- and bifunctional luminescent sensors are described; moreover the selected achievements, such as the “traffic light” sensor are shown.
PL
Praca doktorska nagrodzona w 2005 roku przez Komitet Chemii Analitycznej PAN za najlepszą pracę doktorska z dziedziny chemii analitycznej, ufundowana przez firmę Merck.
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Content available remote Zastosowanie reakcji kompleksowania metali porfirynami w analizie chemicznej
EN
The porphyrin molecules contain four pyrrole rings linked via methane bridges. They are tetradentate ligand, in which the space available for the coordinated metal ion has a maximum diameter of approximately 3.7 Å. Porphyrins and their complexes with metal ions play important role in several biological as well as catalytic systems. They are involved in dioxygen transport and storage, photosynthesis or electron transfer. Due to strong complexing properties and catalytic behaviour, porphyrins and metaloporphyrins have found numerous applications in analytical chemistry. Several porphyrins become useful as the high sensitive chromogenic reagents. The stable complexes between transition metals and porphyrin ligands enable coordinating interaction with additional ligands above and below the molecule plane, so these compounds are used as components of membranes of ion selective electrodes in potentiometry and voltammetry. Several porphyrins find applications as optical sensors and biosensors. Due to the mixed mechanism of interaction between porphyrin macrocycle and various solutes, porphyrins find interesting applications as stationary phases in HPLC for separation of aromatic carboxylates, sulfonates, polycyclic aromatic hydrocarbons, fullerenes as well as amino acids and peptides. In capillary electrophoresis these compounds found application as the derivatizing agents. Porphyrins could be also used as a modifier in solid phase extraction technique or the selective ligands for enrichment of some transition metals.
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Content available remote Chemi-1 biosensory optyczne wykorzystujące porfiryny
PL
Omówiono szerokie możliwości wykorzystania porfiryn jako elementów aktywnych chemi- i bioczujników. Porfiryny to odgrywające olbrzymią rolę w przyrodzie związki makro cykliczne, których analityczne właściwości można modyfikować przez odpowiedni dobór podstawników makrocyklicznego pierścienia lub metalu wprowadzonego do wnętrza pierścienia. Zaprezentowano wykorzystanie i dalsze możliwości zastosowania porfiryn i metaloporfiryn w czujnikach zol-żelowych służących do oznaczania jonów metali, anionów, gazów, pH, związków organicznych oraz związków biologicznie czynnych.
EN
The porphyrins, naturally occuring macrocyclic compounds have in the last several years, gained increasing interest in chemistry of the sensors. The porphyrins play a pivotal role in many natural processes and their properties can be modified by the change of the substituents of the macrocyclic ring or by the kind of the metal inserted into the ring. This review based on original literature references, presents application of the porphyrin and metalloporphyrin sensors to detection of metal cations, anions, gases, pH, organic compounds and biomolecules.
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