radiationless transition

简明释义

无辐射跃迁

英英释义

例句

1.Molecules with high vibrational energy levels often undergo radiationless transition 无辐射跃迁 to release energy without emitting photons.

具有高振动能级的分子通常会经历radiationless transition 无辐射跃迁以释放能量而不发射光子。

2.The presence of heavy atoms in a molecule can enhance the rate of radiationless transition 无辐射跃迁 due to spin-orbit coupling.

分子中重原子的存在可以通过自旋-轨道耦合增强radiationless transition 无辐射跃迁的速率。

3.In fluorescence spectroscopy, the efficiency of light emission can be affected by the occurrence of radiationless transition 无辐射跃迁.

在荧光光谱中，光发射的效率可能会受到发生的radiationless transition 无辐射跃迁的影响。

4.The study of radiationless transition 无辐射跃迁 is crucial in understanding non-radiative decay processes in photophysics.

研究radiationless transition 无辐射跃迁对于理解光物理中的非辐射衰变过程至关重要。

5.In organic solar cells, radiationless transition 无辐射跃迁 can limit the efficiency of energy conversion.

在有机太阳能电池中，radiationless transition 无辐射跃迁可能限制能量转换的效率。

作文

In the field of quantum mechanics and molecular physics, the concept of radiationless transition plays a crucial role in understanding how molecules interact with light and energy. A radiationless transition refers to a process where an excited molecule returns to its ground state without emitting a photon. This phenomenon is significant because it allows for energy dissipation through non-radiative pathways, which can influence various physical and chemical processes. To better understand this, let's consider the example of fluorescence. When a molecule absorbs light, it gets excited to a higher energy level. Typically, one would expect that as it returns to its ground state, it would release energy in the form of light. However, in some cases, the molecule can undergo a radiationless transition, meaning that instead of emitting light, it loses energy through vibrations or collisions with other molecules. This process is critical in many biological systems, such as in photosynthesis, where plants convert light energy into chemical energy efficiently.The efficiency of radiationless transitions can be influenced by several factors, including the molecular structure, temperature, and the surrounding environment. For instance, in a dense medium, the likelihood of collisions increases, enhancing the probability of a radiationless transition. This has practical implications in fields like photochemistry and material science, where controlling energy transfer at the molecular level is essential.Moreover, radiationless transitions are also relevant in the context of photophysics. They can lead to phenomena such as internal conversion and intersystem crossing, which are crucial for understanding the behavior of excited states in molecules. Internal conversion involves a transition between states of the same multiplicity, while intersystem crossing involves a transition between states of different multiplicities. Both processes can significantly affect the lifetime of excited states and the overall efficiency of light absorption and emission in materials.In conclusion, the concept of radiationless transition is vital for comprehending how energy moves through molecular systems without the emission of radiation. Its implications extend across various scientific disciplines, influencing everything from the efficiency of solar cells to the design of new materials for optoelectronics. As research continues to uncover the complexities of these transitions, our ability to harness and manipulate energy at the molecular level will undoubtedly advance, leading to innovations that could transform technology and our understanding of the natural world.

在量子力学和分子物理学领域，无辐射跃迁的概念在理解分子如何与光和能量相互作用方面发挥着关键作用。无辐射跃迁指的是一种过程，其中激发态的分子在不发射光子的情况下返回到基态。这种现象的重要性在于它允许通过非辐射路径耗散能量，这可能影响各种物理和化学过程。为了更好地理解这一点，我们可以考虑荧光的例子。当分子吸收光时，它会被激发到更高的能级。通常，人们会期望它在返回到基态时以光的形式释放能量。然而，在某些情况下，分子可以经历无辐射跃迁，这意味着它没有发出光，而是通过振动或与其他分子的碰撞失去能量。这个过程在许多生物系统中至关重要，例如在光合作用中，植物有效地将光能转化为化学能。无辐射跃迁的效率可以受到多种因素的影响，包括分子结构、温度和周围环境。例如，在密集介质中，碰撞的可能性增加，从而增强无辐射跃迁的概率。这在光化学和材料科学等领域具有实际意义，因为在分子水平上控制能量转移至关重要。此外，无辐射跃迁在光物理学的背景下也相关。它们可能导致内部转换和系间交叉等现象，这对于理解分子中激发态的行为至关重要。内部转换涉及同一重度的状态之间的跃迁，而系间交叉涉及不同重度的状态之间的跃迁。这两个过程都可能显著影响激发态的寿命以及材料中光吸收和发射的整体效率。总之，无辐射跃迁的概念对于理解能量如何在分子系统中移动而不发射辐射至关重要。其影响跨越多个科学学科，影响从太阳能电池的效率到新型光电材料的设计。随着研究继续揭示这些跃迁的复杂性，我们在分子水平上利用和操控能量的能力无疑会得到提升，从而带来可能改变技术和我们对自然世界理解的创新。