Ultrafast photophysics and photochemistry of [Ni]-bateriochlorophyll a
Article Abstract:
A study investigated the excited-state dynamics upon excitation of the (Ni)-BChl bacteriochlorophyll pigments in toluene and pyridine solution, with particular attention being focused on the influence of the central metal ion and its coordination state on the excited state dynamics. Results indicated that the excited state dynamics of the (Ni)-BChl showed a complex kinetic behavior with characteristic time constraints ranging from 100 fs to 25 ps in toluene and 150 fs to > 2 ns in pyridine. Other results and conclusions are discussed.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Time-resolved spectral investigation of bacteriochlorophyll a and its transmetalated derivatives (Zn)-bacteriochlorophyll a and (Pd)-bacteriochlorophyll a
Article Abstract:
Research was conducted to examine the lowest excited singlet and triplet states of bacteriochlorophyll a (BChl) and its central metal derivatives (Zn)- and (Pd)-BChl using femtosecond time-resolved absorption and fluorescence spectroscopy. No short kinetic components were observed for BChl and (Zn)-BChl provided that photochemical changes of the pigments caused by multiple excitation are avoided. Results demonstrate that (Pd)-BChl is a highly efficient photosensitizer for photodynamic tumor therapy.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Effects of threonine 203 replacements on excited-state dynamics and fluorescence properties of the green fluorescent protein (GFP)
Article Abstract:
Research designed to produce a systematic analysis of spectroscopic effects of packing, pi-pi interactions and hydrogen-bonding effects based on a set of single-site aromatic and aliphatic mutations at the position 203 is presented. The ground-state equilibrium between the protonated and deprotonated forms RH and R- is affected by at least two modes of stabilization.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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