Abstract
AbstractAfter a brief review of modulation methods in chemistry experiments with modulated excitation in the field like infrared (MEIR) and electron spin resonance (MESR) are discussed. These will be discussed in the frame work of a simple Jablonski diagram comprising ground and first excited singlet, first excitet triplet and irreversible photo chemical transformations; for the latter arbitrary first order systems may be assumed. Basing on approximate solutions of the kinetic equations it is shown that the modulated component of the populations of the particles of the system follow basically simple amplitude‐phase relation ships, which are analogs of the well known Bode relations for linear electrical networks. MEIR and MESR studies of the photooxidation of polyhydroxy benzenes show that both ground state, hydrogen bond associated dimers and photo radicals follow simple amplitude‐phase dependence on modulation frequency from which information about mechanism and reaction rate constants may be derived. Finally a brief discussion of the general problem of the reconstruction of linear chemical systems from amplitude‐phase measurements is given.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Berichte der Bunsengesellschaft für physikalische Chemie
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
