Photoconduction of Adenosine in Various Morphological Forms

Abstract

OPTICALLY clear films can be cast on a substrate when a neutral adenosine aqueous solution is slowly evaporated at about 60° C. Along the perimeter of the film, white needle-shaped crystallites are observed. If the film is exposed afterwards to high humidity, its clear portion will become cloudy. When viewed under the microscope between crossed nicols, this cloudy portion is seen to consist entirely of spherulites as shown in Fig. 1. The infra-red spectra of: (1) potassium bromide pellet of powdered needle-shaped crystallites; (2) non-spherulitic clear film; (3) spherulitic film of adenosine are shown in Fig. 2. From these spectra it is evident that the molecular arrangements of adenosine in these three morphological forms are different. Further work has to be done in order to elucidate the structures of the material in these various forms. In the present work it is intended to report some results on semi- and photo-conduction of the three different morphological forms of adenosine surface cells.