色素分子吸收光子后电极势的变化  

The Change of Electrode Potential After Pigment Molecules Absorbed Photons

作　　者：高志崇[1] 

机构地区：[1]泰山学院化学与环境科学系,山东泰安271021

出　　处：《辽宁大学学报（自然科学版）》2010年第3期266-268,共3页Journal of Liaoning University：Natural Sciences Edition

摘　　要：推导了吉布斯自由能、电动势、电极势与光子的能量之间的关系,表达式为ΔrGm=-FE=-F[φ(A+|A*)-φ(A+|A)]=0.1λ196.利用该公式计算了基态P680和P700吸收光子变成激发态P6*80和P7*00后电极势的变化,计算值为φ(P3+80|P6*80)-φ(P6+80|P680)=-1.82V,φ(P7+00|P7*00-φ(P6+700|P700)=-1.77V.计算值与测量值完全相同.另外,计算支持紫色光合细菌光系统中B875把S1态的能量转移给D.The relation among the change of Gibbs energy, electromotive force, electrode potential and photon energy was deduced, The formula was ΔrGm=-FE=-F[φ（A＋｜A＊）-φ（A＋｜A）]=0.1196/λ. The changes of electrode potential for ground state P680 and P700 to absorb photons to be turned into excited state P600 and P700 were calculated, the results were φ （ P680＋ ｜ P680 ＊ ） - φ （ P680＋ ｜ P700 ） = - 1.82V, φ （ P700＋ ｜ P700 ＊ ） - φ （ P6700 ＋ ｜P700 ） = - 1.77V. The calculated results were exactly the same with measured values. Also, the energy transmission from state S1 of B875 to D in the photosystem of purple photosynthetic bacteria was surpported bythe calculation.

关 键 词：光化学 光合作用 电化学 吉布斯自由能 波长 

分 类 号：O644.11[理学—物理化学]