7 research outputs found
Analyzer of liquid chemical substances
Článek popisuje pr
incipy analýzy znečišťujících látek ve vodě poímocí molekulární absorpční spektrometrie, pro
analýzu se využívá spektrometr.
Součástí práce je i n
ávrh a implementace softwaru pro vyhodnocování analýzy
vody.
S
oftware je navržen
o tak, aby bylo možné analýzu
a získávání dat provádět velmi jednoduše.
Pozornost
analyze vody je
zaměřena především na dusičnany. Detekce se zaměřuje na stanovení koncentrací jednotlivých
složek,
látka se rozpoznává s využiítím vhodného algoritmu
.The article
describes the
principles of analysis
of pollutants in water
by molecular
absorption
spectrometry
.
The
spectrometer is
used
for analysis.
Design and implementation of
software
for the evaluation of
water analysis
is
part of the work
.
The s
oftware is
designed
with ease of use
and retrieval
of data.
Analysis of
water
is mainly
focused on
nitrates.
The detection
is focused on
determining
levels of particular components,
suitable
algorithm
recognizes the
substance
Femtosecond fluorescence Anisotropy kinetics as a signature of ultrafast electronic energy transfer in bichromophoric molecules
Ultrafast time resolved fluorescence anisotropy decay measurements were performed to gain insight into the energy gap dependence of donor-acceptor inter-chromophoric coupling within one supra-molecule. Three new compounds, each consisting of two semi-rigidly linked and strongly coupled chromophores, were designed and synthesized for this study. Their general structure is donor-spacer-acceptor, where "donor" is phenylamino, pyrenylamino, or benzanthronylamino moiety, and acceptor is aminobenzanthrone. While being similar structurally, the compounds differ significantly in the excitation energy difference of the two chromophores in a supra-molecule. Experimental data show an ultrafast initial fluorescence emission anisotropy decrease (within less then I ps) when the excited state energies of the interacting chromophores are close to each other or equal. No such fast fluorescence anisotropy dynamics is observed for a compound with a large energy gap
Femtosecond fluorescence Anisotropy kinetics as a signature of ultrafast electronic energy transfer in bichromophoric molecules
Ultrafast time resolved fluorescence anisotropy decay measurements were performed to gain insight into the energy gap dependence of donor-acceptor inter-chromophoric coupling within one supra-molecule. Three new compounds, each consisting of two semi-rigidly linked and strongly coupled chromophores, were designed and synthesized for this study. Their general structure is donor-spacer-acceptor, where "donor" is phenylamino, pyrenylamino, or benzanthronylamino moiety, and acceptor is aminobenzanthrone. While being similar structurally, the compounds differ significantly in the excitation energy difference of the two chromophores in a supra-molecule. Experimental data show an ultrafast initial fluorescence emission anisotropy decrease (within less then I ps) when the excited state energies of the interacting chromophores are close to each other or equal. No such fast fluorescence anisotropy dynamics is observed for a compound with a large energy gap