Applied Coordination Chemistry Lab.

            Department of Materials and Life Science.

Staff Members

list of publications

Photochemistry of metal complexes.

Many metal complexes have their own color.  That means they absorb energy of visible light and go into excited states.  The properties of the excited states of the metal complexes are interesting.  Some of which are redox active, and some cause substitution reactions.  The structure in excited states may be different from that in the ground state.   But most of metal complexes has very short life-time of the excited-states (< 10-11s), in such complexes, it is too short to collide with other molecules.   Although the number of the emissive metal complexes has been remarkably increasing in recent years, relatively small number of metal complexes are known to luminesce especially in solution.

We have been studying photochemistry and photophysics of d10 metal complexes.  For example, [Pt(binap)2] shown below was found to have long-lived luminescent triplet state in solution.  The photocphysics and phtochemical reactions with alcohols and organo halides have been studied.



Synthesis and reactions of macrocyclic complexes

There are many macrocyclic complexes showing important activities in plants and animals, such as chlorophyl and hem.  Many macrocyclic metal complexes have been prepared and studied.  We are trying to prepare new macrocyclic compound of novel properties.  

One example is a dinuclear organopalladium complexes encapsulated in a 20-membered macrocycle with N4C2 coordination.  The catalysis using the complex has been studying.


Red, green, brown atoms denote palladium, nitroge, and bromine, respectively.  The structure shown is the Z-shaped isomer.  Another isomer is called "U-shaped".  We are currently investigating the difference in the acitivity of the two isomers.

go to Japanese page