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EN
The review summarizes one decade of research carried out in the Stępień Laboratory at the University of Wrocław. We focus on the group’s contributions to pyrrole chemistry, notably the development of donor-acceptor pyrrole hybrids and their use as building blocks in the synthesis of porphyrins, small-molecule dyes, and nanographene analogues.
EN
In presented work internal structures of intraocular lenses were analyzed in terms of defectiveness degree. Studies were conducted by means of positron annihilation lifetime spectroscopy method PALS. The aim of the work was determination of basic parameters describing annihilation centers in research materials, such as positron lifetime in bulk material, mean positron lifetime in the internal structure, positron trapping rate by trapping centers as well as free volumes dimensions. In obtained results differences in free volumes and positron traps concentrations between hydrophilic and hydrophobic materials were noted. Furthermore, comparison of materials with and without blue light chromophores revealed differences in positron trapping rate by multivacancy-like free spaces. Achieved results were referenced for mechanical properties of the studied materials.
PL
Przy użyciu programu obliczeniowego GAUSSIAN 98 przeprowadzone zostały obliczenia kwantowo-chemiczne polaryzowalności [alfa], hiperpolaryzowalności [beta]° oraz momentu dipolowego [mi] dla benzoimidazolowych, bbenzoitazolowych i etylokarbazolowych pochodnych diazowych p-nitroaniliny, sulfatiazolu oraz sulfadiazyny. Najwyżwsze wartości [beta]° otrzymano dla pochodnych etylokarbazolowych (CARB-1) 63,56 10-30 esu, najniższe zaś dla pochodnych benzoimidazolowych (BIM-2) 19,70 10-30 esu. Wykazano wpływ budowy cząsteczki chromoforu zarówno na wielkość drugiej hiperpolaryzowalności jak i wielkości kryterium FOM (figure of merit). Udział wielkości [beta]° w kryterium FOM dla wszystkich chromoforów z wyjątkiem CARB-1 zawiera się w granicach 0,5-5%.
EN
The polarizability [alfa], first hyperpolarizability [beta]° and dipole moments [mi] of benzoimidazoles, benzothiazoles and ethylcarbazoles derivatives of p-nitroaniline, sulfathiazole and sulfadiazine was evaluated by ab initio (GAUSSIAN 98) quantum-chemical calculations. The highest values of [beta]° were obtained for ethylcarbazoles (CARB-1) 63,56 10-30 esu, the lowest results were obtained for benzoimidazole derivatives (BIM-2) 19,70 x 10-30 esu. Basing of the results of the quantum-chemical calculations the influence of the molecular structure of chromofores on hyperpolarizobility and FOM (figure of merit) was discussed. For the chromofore in question the contribution of [beta]° in FOM is in range of 0,5-5%, except for CARB-1.
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