超分子纳米环的凝聚态多样性与电子跃迁起源
Diversity of coherences and origin of electronic transitions of supermolecular nanoring
摘要：
量子相干性与复杂分子体系的光化学功能密切相关。电子和/或振动相干性的共存和混合，而从来没有明确的实验确定，已被提出负责这种现象。多维光谱分析的合成带状分子六卟啉纳米环与内模板清楚地显示了巨大的多样性，可分离的电子，振动和混合cohesive和他们的合作塑造的光学响应。结果产生明确的电子和振动态的分配，估计的激发转移速率，和退相干时间。理论研究证明，纳米环激发光谱的激发动力学和光谱特征的复杂性是由于循环对称性、小的几何变形和电子振动耦合的综合作用。
英文摘要：
Quantum coherence is highly involved in photochemical functioning of complex molecular systems. Co-existence and intermixing of electronic and/or vibrational coherences, while never unambiguously identified experimentally, has been proposed to be responsible for this phenomenon. Analysis of multidimensional spectra of a synthetic belt-shaped molecular six-porphyrin nanoring with an inner template clearly shows a great diversity of separable electronic, vibrational and mixed coherences and their cooperation shaping the optical response. The results yield clear assignment of electronic and vibronic states, estimation of excitation transfer rates, and decoherence times. Theoretical considerations prove that the complexity of excitation dynamics and spectral features of the nanoring excitation spectrum is due to combined effect of cyclic symmetry, small geometrical deformations, and vibronic coupling.
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