|报告题目:||Medium Matters: Dynamics of Molecules in a Confined Space|
|报 告 人:||V. RAMAMURTHY，Department of Chemistry, University of Miami|
Similar restriction of freedom leads to selectivity in the chemical behavior molecules embedded in biological systems. Extending these well-known concepts supramolecular chemists have established that even small molecules upon confinement in synthetic hosts exhibit behaviour distinctly different from the ones in an isotropic solution.
In this lecture the role a “Medium” in bringing about changes in the well-established behaviour of excited molecules would be illustrated with select examples. Results of steady state and ultrafast experiments will be presented that highlight how the confinement alters the excited state dynamics of stilbenes and azobenzenes, the molecules that act as triggers in various biological systems and man-made devices. Another reaction to be discussed concerns with electron transfer (eT) that plays a fundamental role in a number of biological events including photosynthesis. Examples and ultrafast dynamics of donors, imprisoned within an organic capsule, transferring an electron to an acceptor across a molecular wall would be presented.
The main message of the talk is that molecules like humans behave differently when confined within synthetic cages.