Transformations of functional groups OCOPh, OCH2Ph, I, NO2, and CO2Me in Blatter's radical derivatives 1-5 were investigated in order to develop synthetic tools for incorporation of the benzo[1,2,4]triazinyl system into complex molecular architectures. Thus, basic hydrolysis of OCOPh or Pd-catalyzed debenzylation of OCH2Ph gave phenol functionality, which was acylated and alkylated. Pd-catalyzed Suzuki, Negishi, Sonogashira, and Heck C-C cross-coupling reactions of iodo derivatives 1c, 1d, and 2d were also successful and efficient. Reduction of NO2 in 1e led to aniline derivative 1t, which was reductively alkylated with hexanal and coupled to l-proline. Selected benzo[1,2,4]triazinyl radicals were characterized by EPR and electronic absorption spectroscopy, and the results were analyzed in tandem with DFT computational methods. Lastly, the mechanism for formation of the 1,4-dihydrobenzo[1,2,4]triazine ring was investigated using the B3LYP/6-31G(2d,p) method.

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MS nanoparticles were prepared with chitosan (CS) as the synthesis template at normal temperature by simulating biomineralization method. ZnS , PbS , and CdS CS nanocomposites as model were prepared by simulating biomineralization method of corresponding twain valent ions into nanoparticles in the presence of CS. The structural and morphological features of MS (M = Zn, Cd, and Pb)-CS were investigated by scanning electron microscopy. Optical characteristics of nanocomposites were studied by the approaches of ultraviolet-visible spectroscopy and fluorescence, from which the conclusions show that the CS matrix offers limited conditions for ZnS to grow, the precursor concentration can also affect the formed particle size, and thus the particle size can be controlled in the CS matrix by these two means. The differential scanning calorimetery result indicated a strong and uniform interaction between CS and nanoparticles. The experimental results indicated that all the nanoparticles aggregated into nanopartical and CS as a template played an important role in the formation of nanopartical. In addition, a possible structure-controlling

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