XPost: sci.chem   
   From: a202010@lycos.com-   
      
   Salmon Egg wrote:   
      
   >  Timothy Sutter wrote:   
      
   > > meaning, i'd wonder if a single dye molecule could   
   > > be varied likrabbit ears, but a series of differently   
   > > sized dye molecules could be varied like rabbit ears,   
   > > but this would be difficult.   
      
   > When I was active in using passive Q-switching, the Soviets published on   
   > shifting phthalocyanine absorption for Q-witching by using Lewis acids.   
   > That was based on earlier work of French scientists.   
      
   my guess is that the phthalocyanine is a lewis base   
   and a metal center would be the lewis acid, but, that,   
   you could still hang other ligands on the metal center   
   which would be other lewis bases, so i don't know exactly   
   how this would line up with the sensitizer/activator   
   chromophore/auxochrome routine.   
      
   maybe i'll learn something   
      
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