184 



LIGHT AND LIFE 



Structure and Chemiluminescence 

 The cheniihiniinescence ol luminol was first reported in 1928 by 

 Albrecht (1) . Since that time, a large number of hydrazides have been 

 tested for their chemiluminescence activity but none has been found 

 to surpass kmiinol in this respect. A knowledge of relationships 

 between structure and activity has resulted from these investigations, 

 however (Fig. 2) . The substituted luminol III, for example, proved 



N— NH, 



NH^ O 



NH2 O 



IV 



NH2 O 



VI 



VII 



R=H o. 0_^_ 



XI 



rx 



xw 



