1800 



SPECTROSCOPY AND FLUORESCENCE OF PIGMENTS CHAP. 37C 



I 

 O 



K 



z 



380 



400 420 440 460 480 500 520 540 560 580 600 620 640 660 



Fig. 37C.4. Absorption .spectrum of ethyl chlorophyllide h in etlier (after Holt and 



Jacobs 1954). 



"I — ' — 1 — I — I — 1 — I — I — I — ' — I — ' — r 



_L 



■ I I I 1 I I 1 L. 



"T — ' — r 



1 1 r- 



220 240 260 280 300 320 340 360 380 



380 400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700 



Fig. 37C.5. Absorption spectrum of ethyl pheophorbide a in ether (after Holt and 



Jacobs 1954). 



phyll a is located at much shorter waves than in any other solvent. They 

 found it at 642.5 m/i; it was 35% lower than in ether, while the blue peak 

 was 65% higher. Evaporating and re-dissolving in ether did not bring 

 the band back to its normal position, indicating an irreversible chemical 



