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本文发现从螺旋藻(Spirulina platensis)中分离出的变藻蓝蛋白三聚体(αβ)_3在解聚为单体(αβ)时,伴随着明显的光谱学特性的变化。我们利用稳态和皮秒(10~(12)S)瞬态光谱学的方法研究了导致变藻蓝蛋白单体(αβ)和三聚体(αβ)_3光谱学差别的发色团之间的相互作用。计算了变藻蓝蛋白中发色团的吸收和发射跃迁偶极矩之间的夹角。尝试性地建立了用以解释变藻蓝蛋白内发色团之间的相互作用的激子相互作用和弱偶极相互作用的机理模型。
In this paper, it was found that the terpolymer (αβ) _3 isolated from Spirulina platensis was accompanied by obvious spectral changes when depolymerized into monomers (αβ). We used steady-state and picosecond (10 ~ (12) S) transient spectroscopy to investigate the relationship between the chromophores that caused the difference in spectroscopic differences between the altered phycocyanin monomer (αβ) and the trimer (αβ) Interaction. The angle between the absorption and emission dipole moment of the chromophore in the variable phycocyanin was calculated. A mechanistic model was tentatively established for exciton interaction and weak dipole interaction to account for the interaction between chromophores within the variable cyanins.