RESUMEN
Novel fluorescent mono- and bisboron complexes based on pyrimidine bearing ß-iminoenolate ligands were synthesized, and their fluorescence properties were investigated. The nonsubstituted and trifluoromethyl-substituted monoboron complexes showed higher fluorescence quantum yield in solid state than in solution. The dimethylamino derivative of the monoboron complex exhibited positive solvatochromism in the fluorescence spectra. The bisboron complex showed significantly higher molar absorption coefficient and red-shifted maximum absorption and maximum fluorescence wavelengths than the corresponding monoboron complex.
Asunto(s)
Compuestos de Boro/química , Compuestos de Boro/síntesis química , Fluorescencia , Pirimidinas/química , Pirimidinas/síntesis química , Cristalografía por Rayos X , Modelos Moleculares , Estructura Molecular , Teoría CuánticaRESUMEN
We have identified the following events during the late stage in the mother cell in Bacillus subtilis: spore detachment from the polar site of the mother cell, membrane rupture, cell wall collapse, and release of the free spore. The membrane rupture was followed by mother cell lysis. Moreover, we found that NucB, an extracellular nuclease, is involved in DNA degradation after mother cell lysis.