Olefin [2+2] photocycloaddition reactions based on coordination-bond templates provide numerous advantages for the selective synthesis of cyclobutane compounds. This review outlines the recent advances in the design and construction of single crystal platforms of olefinic coordination polymers for precise organic synthesis, in situ exploration of reaction mechanisms, and possible developments as comprehensively as possible. Numerous examples are presented to illustrate how the arrangements of the olefin pairs influence the solid-state photoreactivity and examine the types of cyclobutane products. Furthermore, the photocycloaddition reaction mechanisms are investigated by combining advanced techniques such as single crystal X-ray diffraction, powder X-ray diffraction, nuclear magnetic resonance, infrared spectroscopy, fluorescence spectroscopy, laser scanning confocal microscopy and theoretical calculations. Finally, potential applications resulting from promising physicochemical properties before and after photoreactions are discussed, and existing challenges and possible solutions are also proposed.

中文翻译：

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烯烃配位聚合物单晶平台的构建：精准有机合成、反应机理原位探索等

基于配位键模板的烯烃[2+2]光环加成反应为环丁烷化合物的选择性合成提供了许多优势。本文概述了用于精确有机合成的烯烃配位聚合物单晶平台的设计和构建、反应机理的原位探索以及尽可能全面的可能发展的最新进展。提供了许多例子来说明烯烃对的排列如何影响固态光反应性并检查环丁烷产物的类型。此外，结合单晶X射线衍射、粉末X射线衍射、核磁共振、红外光谱、荧光光谱、激光扫描共焦显微镜和理论计算等先进技术，研究了光环加成反应机理。最后，讨论了光反应前后有前景的物理化学性质所带来的潜在应用，并提出了现有的挑战和可能的解决方案。