The charge transfer can be either thermally or optically induced. It can be described by transitions between, or motions on, free energy surfaces (FESs).23 The free energy of the whole electron donor−acceptor system, including the solvent environment, is given as a function of the reaction coordinate (Figure 2). Following the Franck−Condon principle, electron motion is much faster than nuclear motion.As a consequence, optically induced charge transfer occurs from the minimum of the reactant state generated by an increase in the energy along the vertical direction to the product FESs, whereas thermally induced charge transfer can occur only in the transition-state (TS) region。
這段的翻譯:電荷轉(zhuǎn)移可以是熱或光學(xué)誘導(dǎo)。通過在自由能曲面之間或者在其上運(yùn)動(dòng)的過渡來描述。包括在溶劑環(huán)境下,整個(gè)電子供體受體體系的自由能,給出了反應(yīng)坐標(biāo)的函數(shù)(圖2)。遵從弗蘭克−康登原則,電子運(yùn)動(dòng)比原子運(yùn)動(dòng)更快。得出結(jié)果,光誘導(dǎo)電荷轉(zhuǎn)移在能量的加入下,從反應(yīng)態(tài)最小值沿著垂直方向向產(chǎn)物自由能表面移動(dòng),而熱誘導(dǎo)電荷轉(zhuǎn)移僅僅發(fā)生在過渡區(qū)域。
我想問的是1.光誘導(dǎo)電荷是垂直方向傳導(dǎo)的,熱誘導(dǎo)為什么就不是呢?熱誘導(dǎo)難道不是通過電子激活傳遞電荷的么?
2.圖中的過渡區(qū)域是那一塊?我沒看明白,
![文獻(xiàn)中看到的一個(gè)圖,有個(gè)地方?jīng)]太懂]()
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