[Impulse photoconductivity of solutions of ohlorophyll and its analogs. III. Photoconductivity of hexanol solutions of chlorophyll a in the presence of n-benzoquinone. Kinetic and temperature measurements].
It is shown that an increase deltasigma of electroconductivity of chlorophyll "a" (Chlalpha) solution in hexanole in the presence of n-benzoquinone (Q) under impulse illumination of solution is proportional to flash intensity: deltasigma=1(0,99+/-0,07). Dependence deltasigma on solution temperature is of an exponential character with the activation energy Esigma=0,30+/-0,01 ev. In the temperature range studied (248--298 degrees K) the ratio between the recombination velocity constant and the mobility of ion-radicals Chlalpha+ and Q-(Kp/mu) is shown to be equal (8+/-1)X 10(-8) cm-v. The activation energy for the dissociation of coulomb pair (Chlalpha+Q-) into free ion-radicals Epiapproximately0,1 ev is evaluated. The value of total mobility of negative and positive ion-radicals is calculated from the date obtained and literature ones: mu=(1,0+/-0,2)X10(-5) cm2/v-sec.
D002734:Chlorophyll; D004553:Electric Conductivity; D000441:Hexanols; D007700:Kinetics; D008027:Light; D011809:Quinones; D013696:Temperature
D000441:Hexanols; D011809:Quinones; D002734:Chlorophyll
Impul'snaia fotoprovodimost' rastvorov khlorofilla i ego analogov. III. Fotoprovodimost' geksanolovykh rastvorov khlorofilla a v prisutstvii n-benzokhinona. Kineticheskie i temperaturnye izmereniia