TiO 2 photocatalytic 2e 2 -reduction of azobenzene to hydrazobenzene is found to occur at l ex > 300 nm while loading of nanometer-sized Pt particles on TiO 2 induces NNN bond cleavage via 4e 2 -reduction; only photoisomerization occurs in the absence of TiO 2 .

No abstract

No abstract

No abstract

A Novel Approach Toward Bacteriochlorophylls-e and f.-The transformation of the methyl to a formyl group at the 7-position of the chlorin moiety in (I) provides an alternative route for the synthesis of the title pigments.