EAN: 9783031012631

SYNTHESIS LECTURES ON MATERIALS AND OPTICS SI...

Singlet Oxygen  the lowest electronically excited state of molecular oxygen  is highly reactive
and involved in many chemical and biological processes. It is one major mediator during
photosensitization  which has been used by mankind since ancient times  even though the
mechanisms behind it were understood only about half a century ago. The combination of high
reactivity and very long natural lifetime allows for direct optical detection of singlet oxygen
and its interactions using its characteristic phosphorescence at around 1270 nm. Since this
emission is very weak  optical detection was technically very challenging for a long time.
Therefore  even today  most laboratories only exploit the high reactivity to observe the
interaction with sensor molecules  rather than singlet oxygen emission itself. However  in
recent years highly sensitive optical detection was developed  the authors being major
contributors. This book is dedicated to the detection of singlet oxygen  discussing
possibilities  pitfalls and limits of the various methods with a special focus on time-resolved
phosphorescence and the kinetics of singlet oxygen generation and decay including involved and
related processes  discussing investigated systems with various complexity from solutions over
in vitro to in vivo. The long-standing paradigm that singlet oxygen phosphorescence is a
benchmark for detection systems rather than an option for process observation is still
ubiquitous and this book hopes to contribute in overcoming this still prevailing bias.

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