In this paper, spiropyran-containing metal- and covalent-organic frameworks (MOFs and COFs, respectively) are probed as platforms for fostering photochromic behavior in solid-state materials, while simultaneously promoting directional energy transfer (ET). In particular, Förster resonance energy transfer (FRET) between spiropyran and porphyrin derivatives integrated as linkers in the framework matrix is discussed. The photochromic spiropyran derivatives allow for control over material optoelectronic properties through alternation of excitation wavelengths. Photoinduced changes in the material electronic profile have also been probed through conductivity measurements. Time-resolved photoluminescence studies were employed to evaluate the effect of photochromic linkers on material photophysics. Furthermore, “forward” and “reverse” FRET processes occurring between two distinct chromophores were modeled, and the Förster critical radii and ET rates were estimated to support the experimentally observed changes in material photoluminescence.

中文翻译：

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光响应框架：聚光灯下的能量转移

在本文中，探索了含有螺吡喃的金属和共价有机框架（分别为 MOF 和 COF）作为促进固态材料光致变色行为的平台，同时促进定向能量转移 (ET)。特别是，讨论了作为连接体整合到框架基质中的螺吡喃和卟啉衍生物之间的 Förster 共振能量转移 (FRET)。光致变色螺吡喃衍生物允许通过改变激发波长来控制材料的光电特性。还通过电导率测量探测了材料电子分布的光致变化。时间分辨光致发光研究用于评估光致变色接头对材料光物理学的影响。此外，